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Aerospace Systems Lab

The Aerospace Systems Laboratory conducts research in modeling, simulation, control and estimation of mechanical and aerospace systems from a systems perspective. Over the past few years, we have looked at diverse mechanical and aerospace systems. Our theoretical contributions, numerical simulations, algorithms and software span several applications:

  • Flight dynamics and control
  • Unmanned vehicle systems
  • Morphing wing aircraft structures
  • Air traffic management
  • Reduced order modeling of fluid-structure interactions
  • Cooperative control of large scale interconnected systems subject to communication delays
  • Multi-sensor fusion applied to aircraft guidance and spacecraft navigation
  • Bipedal locomotion
  • Uncertainty characterization in orbital mechanics.
Our research topics include:
  • Robust Adaptive Intelligence Design (RAID) Framework for Biped Walking
  • Intuitive Control - A framework that integrates Adaptation, Optimization and Identification
  • Resident Space Object Estimation and Identification
  • Cooperative Control of Unmanned Vehicles
  • Spacecraft trajectory optimization and attitude control
  • Performance Adaptive Wings for Aircraft
  • Guidance, Navigation and Control (GNC) of atmospheric flight vehicles - Extremum Seeking Formations, Optimal Guidance
  • Analysis of Uncertainties in Next Generation Air Transportation System - Improved RNAV and Trajectory Prediction

Personnel

  • Kamesh Subbarao, Ph.D., Director

Current Students

PhD (In Progress)

  • Paul Quillen
  • Ameya Godbole
  • Rajnish Bhusal
  • Adam Johnson
  • Gowtham Sai Garikipati (joint advisee with Dr. A. Dogan)
  • Diganta Bhattacharjee
  • Katyayani (Kati) Balachandran

M.S.

  • V.N.V. Murali (ME)
  • Roopak Karulkar (ME)
  • Denish Baman (ME)
  • Karan V. Rao (ME)
  • Sachit Kaul (ME)
  • Aditya Jagajampi (ME)
  • Abhishek Bhoraniya (ME)
  • Srushti Desai (AE)
  • Abel Martinez (AE)
  • Prabhjeet Singh Arora (ME)
  • Mitchel Thomas McDonald (AE)
  • Matthew Shaver (AE)

Undergraduate

  • Daniel Palmquist (AE)

Group Alumni

Ph.D.

  • Pengkai Ru (2017) - Nonlinear Model Predictive Control for Cooperative Control and Estimation
  • Tracie Perez (2016) - A Framework for Employing Femtosatellites in Planetary Science Missions, Including a Proposed Mission Concept for Titan
  • Stanley Ryan Sifford (2016) - System Health Monitoring Using Multiple Model Adaptive Estimation Techniques
  • Ghassan Atmeh (2015) - Novel Neuro-Dynamic Methods for Solving Robotic Planning and Control Problems
  • Brian Copp (2015) - Bayesian Statistics and Information Fusion for GPS-Denied Navigation
  • Alok Rege (2015) - Characterization of Flapping Wing Aerodynamics and Flight Dynamics Analysis using Computational Methods
  • Pavan Kumar (2015) - Nuthi Aspects of Intuitive Control: Stabilize, Optimize, Identify
  • Laura Henderson (2014, NSF Graduate Research Fellowship (2011), Amelia Earhart Fellowship (2011-12), currently working at NextGen Aeronautics) - Modeling, Estimation, and Analysis of Unresolved Space Object Tracking and Identification
  • Mousumi Ahmed (2012, Amelia Earhart Fellowship (2011-12), currently working at Lord Microsystems) - Graph-Theoretic Framework Based Cooperative Control of Multiple Unmanned Aerial Vehicles .
  • Jennifer Goss (2009, Amelia Earhart Fellowship (2006-08), currently working at Sikorsky Aircraft) - Optimal-Control Theoretic Methods for Optimization and Boundary Control of Distributed Parameter Systems
  • Abhijit Das (EE, jointly supervised with Prof. Frank L. Lewis), currently working at Caterpillar
  • Jyotirmay Gadewadikar (EE, jointly supervised with Prof. Frank L. Lewis)
  • Puneet Singla (AE, jointly supervised with Prof. John L. Junkins at Texas A & M University), currently an associate professor at the Mechanical and Aerospace Engineering department at SUNY Buffalo 

Visiting Student Researchers

  • Mihir Ravindra Mogra (BS, Junior, College of Engineering, Pune, Maharashtra, India) - Analysis and Implementation of a LIDAR system for Obstacle Detection in Unmanned Ground Vehicle Applications - Summer 2017
  • Ivan Doria Posca (BS, Sophomore, University of Washington, Pullman) - Navigation in GPS denied environment (Wall Following Quadcopter) - Summer 2016
  • Siddharth Nair (BTech, Junior, IIT Mumbai) - Cooperative Control and Consensus under uncertain Time Delays - Summer 2016
  • Marcin Brodecki (MSc, Faculty of Aerospace Engineering at TUDelft, Delft University of Technology, Netherlands) - Formation Flight Control Systems Design Using Advanced Extremum Seeking Algorithms - Maximizing the Drag Reduction Obtained From Flying in Formation . July 2011 - July 2012
  • Pulkit Goyal (BE (AE), Indian Institute of Space Science and Technology, Thiruvananthapuram, Kerala, India via Universities Space Research Administration) - Analysis of Estimation Using Unscented Kalman Filter (UKF) and Batch Estimation using Astrometric and Photometric Measurements for Space Objects . March - June 2011
  • Apoorv Mehta (BE (Avionics), Indian Institute of Space Science and Technology, Thiruvananthapuram, Kerala, India via Universities Space Research Administration) - Vision based Estimation using the Unscented Kalman Filter for Autonomous Rendezvous of Spacecraft . March - June 2011
  • Erik de Vries (MSc, Faculty of Aerospace Engineering at TUDelft, Delft University of Technology, Netherlands) - Cooperative Control of a Swarm of Unmanned Aerial Vehicles using potential functions and quadrotor models . October 2009 - September 2010

M.S.

  • Shashank Hariharapura (2015, AE) - Autonomous Carrier Landing System for V/STOL Aircraft using L_1 Adaptive and Optimal Control.
  • Ameya Godbole (2015, ME) - Dynamics and Control of the Smart Maintenance and Inspection Robotic Free-Flyer (SMIRFF). 
  • Andrew Swift (2015. AE) - GPS INS Fusion Techniques.
  • Aaron Cain (2014, AE) - Adaptive Kalman Filter.
  • Tyler Rainey (2014, AE) - Loss-Of-Control Prediction And Fault Tolerant Control – An Adaptive Control Framework.
  • Pankaj Sarda (2012, ME) - Control of a Teleoperating Robotic Arm Subject to Time Delays . 
  • Carlos Tule (2012, AE) - Trajectory Generation and Constrained Control of Quadrotors. 
  • Alok Ashok Rege (2012, AE) - CFD based Aerodynamic Modeling to Study Flight Dynamics of a Flapping Wing Micro Air Vehicle.
  • Ghassan Atmeh (2012, AE) - Guidance and Control of Unmanned Airships for Waypoint Navigation in the Presence of Wind.
  • Ifeolu Ogunleye (2011, AE) - Online Reference Trajectory Modification in the Presence of Actuator Faults. 
  • Lee Christiansen (2011, AE) - Multi-mode Kalman Filter Target Tracking Algorithm.
  • Elizabeth Copelin (2010, AE) - Using Doppler Effect with Phantom Track Generation. 
  • Divya Bhatia (2010, AE) - Constrained Dynamics Approach for Motion Synchronization and Consensus.
  • Manju Nag (2010, AE) - Trajectory Uncertainty Analysis for the Development of a Queuing Model for the National Airspace System. 
  • Kartik Kiran Parikh (2009, ME, jointly advised by Prof. Atilla Dogan) - CAE Tools for Modeling Inertia and Aerodynamic Properties of an R/C Airplane.
  • Borna Obradovic (2009, AE) - Modeling and Simulation of the Flight Dynamics of Morphing Wing Aircraft. 
  • Brandon Shippey (2008, AE) - Trajectory Optimization Using Collocation and Evolutionary Programming for Constrained Nonlinear Dynamical Systems.
  • Abhijit Supekar (2007, ME) - Design, Analysis and Development of a Morphable Wing Structure for Unmanned Aerial Vehicle Performance Augmentation.
  • Jonathan McDonald (2006, AE) - Multi-Sensor Fusion based Control for Autonomous Operations: Rendezvous and Docking of Spacecraft.
  • Praveen Muralidhar (2006, EE) - Observer Synthesis for Linear/Nonlinear Dynamical Systems subject to Measurement Delays.
  • Jolanta Matusewicz (2006, AE, Amelia Earhart Fellowship, 2008) - Uncertainty Characterization of Orbital Debris.
  • Jeffery Ginn (2006, AE) - Spacecraft Formation Flight: Analysis of the Perturbed Modified Hill-Clohessy-Wiltshire Equations.
  • Jennifer D. Goss (2005, AE) - Sensitivity Analysis and Optimization of Hypersonic Inlet Performance subject to Magnetohydrodynamic Effects.
  • Ken McKinney (2005, AE) - Optimal Thrust Vectoring Strategies.
  • Rahul Rajvanshi (2004, AE) - Optimal Strategies for Cooperative Air Traffic Conflict Detection and Resolution.
  • Sam James Welsh (2004, AE, Texas Space Grant Consortium Graduate Fellowship recipient, 2004) - Adaptive Synchronization and Control of Nonlinear Dynamical Systems.

Undergraduate Research

  • Daniel Palmquist (2016, AE)
  • Tyler Wright (2016, AE)
  • Madhu Gautam (2015, ME)
  • Caleb Liebman (2014, ME)
  • Siddharth Kashyap (2013, ME)
  • Alex Graves (2012, AE)
  • Laura Henderson (2010, AE)
  • Ronak Patel (2010, AE)
  • Manuj Awasthi (2010, AE)
  • Sakurako Takahashi (2009, AE)
  • Hisashi Inoue (2006, AE)
  • Michael Byron Webb (2004, AE)

Visiting Student Researchers

  • Mihir Ravindra Mogra (B.S., Junior, College of Engineering, Pune, Maharashtra, India) - Analysis and Implementation of a LIDAR system for Obstacle Detection in Unmanned Ground Vehicle Applications
  • Ivan Doria Posca (B.S., Sophomore, University of Washington) - Navigation in GPS denied environment (Wall Following Quadcopter)
  • Siddharth Nair (B.Tech., Junior, IIT Mumbai) - Cooperative Control and Consensus under uncertain Time Delays
  • Marcin Brodecki (M.Sc., Faculty of Aerospace Engineering at Delft University of Technology, Netherlands) - Formation Flight Control Systems Design Using Advanced Extremum Seeking Algorithms: Maximizing the Drag Reduction Obtained From Flying in Formation
  • Pulkit Goyal (B.E. (AE), Indian Institute of Space Science and Technology, via Universities Space Research Administration) - Analysis of Estimation Using Unscented Kalman Filter (UKF) and Batch Estimation using Astrometric and Photometric Measurements for Space Objects
  • Apoorv Mehta (B.E. (Avionics), Indian Institute of Space Science and Technology, via Universities Space Research Administration) - Vision based Estimation using the Unscented Kalman Filter for Autonomous Rendezvous of Spacecraft.
  • Erik de Vries (M.Sc., Faculty of Aerospace Engineering, Delft University of Technology, Netherlands) - Cooperative Control of a Swarm of Unmanned Aerial Vehicles using potential functions and quadrotor models.

Selected Publications

2016

Journal

  • Laura Henderson, Kamesh Subbarao, "Inverse Crime' and Model Integrity in Lightcurve Inversion applied to unresolved Space Object Identification", The Journal of the Astronautical Sciences, (Online First), Publication Date: 12/2016
  • Kamesh Subbarao, Pavan Nuthi, Ghassan Atmeh, "Reinforcement Learning based Computational Adaptive Optimal Control and System Identification for Linear Systems", Annual Reviews in Control 42C (2016) pp. 319-331, DOI information: 10.1016/j.arcontrol.2016.09.021
  • Pavan Nuthi, Kamesh Subbarao, "Computational Adaptive Optimal Control of Spacecraft Attitude Dynamics with Inertia Matrix Identification", AIAA Journal of Guidance, Control and Dynamics (In Press, October 2016)
  • Kamesh Subbarao, Mousumi Ahmed, "Target Tracking using Multiple Unmanned Aerial Vehicles: Graph Theoretic Nonlinear Control Approach", Journal of Aerospace Engineering (Proceedings of the Institution of Mechanical Engineers 'G') (In Press, March 2016)
  • Mousumi Ahmed, Kamesh Subbarao, "Target Tracking in 3-D Using Estimation Based Nonlinear Control Laws for UAVs",Aerospace, 2016, 3(1), 5; doi:10.3390/aerospace3010005
  • Ghassan Atmeh, Kamesh Subbarao, "Guidance, Navigation and Control of Unmanned Airships under Time-Varying Wind for Extended Surveillance",Aerospace , 2016, 3(1), 8; doi:10.3390/aerospace3010008

Conference

  • Hariharapura Ramesh, S., Subbarao, K., "Autonomous Carrier Landing System for the A/V-8B Harrier like UAV", In Proceedings of the 4th International Conference on Advances in Control and Optimization of Dynamical Systems, NIT Tiruchirapalli, India, February 1-5, 2016
  • Atmeh, G., Subbarao, K., "A Dynamic Neural Network with Feedback for Trajectory Generation", In Proceedings of the 4th International Conference on Advances in Control and Optimization of Dynamical Systems, NIT Tiruchirapalli, India, February 1-5, 2016
  • Subbarao, K., Nuthi, P., "Computational Adaptive Optimal Control of Spacecraft Attitude Dynamics with Inertia Matrix Identification", American Control Conference, Boston, MA, July 2016
  • Quillen, P., Subbarao, K., Munoz, J., "Guidance and Control of a Mobile Robot via Numerical Navigation Functions and Backstepping for Planetary Exploration Missions ", AIAA SPACE, September, 2016, Ca, USA

2015

Journal

  • Nuthi, P., Subbarao, K., "Implementation and Testing of Adaptive Augmentation Techniques on a 2DOF Helicopter", ASME Journal of Dynamic Systems, Measurement and Control, 2015; 137(6):0645010645016; DS131520; doi: 10.1115/1.4029273
  • Brodecki, M., Subbarao, K., "In-Flight Sweet Spot Estimation for Autonomous Formation Flight", AIAA Journal of Guidance, Control and Dynamics, Vol. 38, No. 6 (2015), pp. 10831096. doi:10.2514/1.G000220
  • Brian Copp and Kamesh Subbarao, "Nonlinear Adaptive Filtering in Terrain Referenced Navigation", IEEE Transactions in Aerospace Electronics and Systems, vol. 51, no. 4, pp. 3461-3469, Oct. 2015; doi:10.1109/TAES.2015.140826

Conference

  • Kamesh Subbarao, Carlos Tule, Pengkai Ru, "Nonlinear Model Predictive Control Trajectory Tracking Applied to Unmanned Aerial Vehicles '', AIAA Atmospheric Flight Mechanics Conference, Aviation Forum, Dallas, TX, June 2015.
  • Alok Rege, Brian Dennis, Kamesh Subbarao, "Force Production by Wing Flapping: The Role of Stroke Angle of Attack and Local Reynolds Number'', AIAA Atmospheric Flight Mechanics Conference, Aviation Forum, Dallas, TX, June 2015.
  • Brian Copp, Kamesh Subbarao, "Adaptive Estimation of Altitude Bias in Terrain Referenced Navigation", ION GNSS+ Conference, Tampa, FL, September 2015
  • Tracie Perez, Kamesh Subbarao, "A Miniature Satellite Mission Case Study: Observation of Titan's Dynamic Ionosphere '', AIAA Space Forum, Pasadena CA, September 2015.
  • Brian Copp, Kamesh Subbarao, "Nonlinear Adaptive Filtering in Terrain-Referenced Navigation'', American Control Conference, Chicago, IL, July 2015

2014

Conference

  • Ghassan M. Atmeh, Isura Ranatunga, Dan O. Popa, Kamesh Subbarao, Frank Lewis, and Patrick Rowe, "Implementation of an Adaptive, Model Free, Learning Controller on the Atlas Robot", American Control Conference, Portland, OR, June 2014.
  • Ghassan Atmeh, Isura Ranatunga, Dan Popa, Kamesh Subbarao, "Indoor Quadrotor State Estimation using Visual Markers", The 7th ACM International Conference on Pervasive Technologies Related to Assistive Environments (PETRA), May 27-30, 2014, Rhodes, Greece.
  • Nuthi, P., and Subbarao, K., "Computation of Safe Sets for Model-Free Dynamical Systems: Aircraft Longitudinal Dynamics", AIAA Atmospheric Flight Mechanics Conference, AIAA 2014-0895, AIAA SciTech 2014, National Harbor, MD.
  • Nuthi, P., and Subbarao, K., "Autonomous Vertical Landing on a Marine Vessel", AIAA Atmospheric Flight Mechanics Conference, AIAA 2014-0895, AIAA SciTech 2014, National Harbor, MD.
  • Rege A., Subbarao K., and Dennis B., "Nonlinear Dynamics of Flapping Wing MAV using Cycle-Averaged Force Coefficients", AIAA Atmospheric Flight Mechanics Conference, AIAA 2014-0895, AIAA SciTech 2014, National Harbor, MD.
  • Henderson, L., and Subbarao, K., "Inverse Crime and Model Integrity in Unresolved Space Object Identification", Space-flight Mechanics Meeting, American Astronautical Society, AAS-14-205, Santa Fe, NM, January 2014.

2013

Conference

  • M. Brodecki, K. Subbarao, Q. P. Chu, "Emergent Behavior of Multi-Vehicle Formations Using Extremum Seeking", 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2013, 10.2514/6.2013-1033
  • M. Brodecki, K. Subbarao, Q. P. Chu, "Formation Flight Control System for In-Flight Sweet Spot Estimation", 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2013, 10.2514/6.2013-1037
  • Rege, A., Dennis, B., Subbarao, K., "Parametric Study on Wing Flapping Path of a Micro Air Vehicle Using Computational Techniques", 51st AIAA Aerospace Sciences Meeting, 7-10 January 2013, Grapevine, TX, USA, AIAA 2013-0953.
  • Rege A., Dennis B., and Subbarao K., "Sensitivity Analysis of the Factors Affecting Force Generation By Wing Flapping Motion", ASME International Mechanical Engineering Congress and Exposition, San Diego, CA, 2013.

2012

Journal

  • Subbarao, K., Ahmed, M., "Nonlinear Guidance and Control Laws for 3-D Target Tracking applied to Unmanned Aerial Vehicles" ASCE Journal of Aerospace Engineering,(doi: 10.1061/(ASCE)AS.1943-5525.0000275), 2012.

Conference

  • Rege, A., Subbarao, K., Dennis, B., "Open Loop Simulation of the Nonlinear Dynamics of a Flapping Wing Micro Air Vehicle", Proc. of AIAA Guidance, Navigation and Control Conference, AIAA 2012-5025, Minneapolis, MN 2012 (doi: 10.2514/6.2012-5025) .
  • Atmeh, G., Subbarao, K. , 2012, "Optimal Control of an Unmanned Lighter-Than-Air Vehicle Through Way-Point Navigation", ASME International Mechanical Engineering Congress and Exposition, Houston, TX, November, 2012.
  • Ahmed, M., Subbarao, K., "Estimation based cooperative guidance controller for 3D target tracking with multiple UAVs", Proc. of American Control Conference, June, 2012, pages 6035-6040
  • Henderson, L., Goyal, P., Subbarao, K., "Inverse Problem Formulation Coupled with Unscented Kalman Filtering for State and Shape Estimation of Space Objects", American Astronautical Society Space Flight Mechanics Meeting, February 2012, AAS 12-115
  • Goyal, P., Henderson, L., Subbarao, K., "Analysis and Estimation using Unscented Kalman Filter for Space Objects in the Lower Earth Orbit using Astrometric and Photometric Measurements" Second International Conference on "Advances in Control and Optimization of Dynamical Systems (ACODS) -2012", February 2012, Paper ID 567
  • Mehta, A., Subbarao K., "Vision-based Estimation using the Unscented Kalman Filter for Autonomous Rendezvous of Spacecraft", Second International Conference on "Advances in Control and Optimization of Dynamical Systems (ACODS) -2012", February 2012, Paper ID 531

2011

Book Chapters

  • B. Obradovic and K. Subbarao, "Modeling and Simulation to Study Flight Dynamics of Morphing Wing Aircraft", chapter submitted to John Valasek (editor), Wiley Publishers.
  • A. Das, F. L. Lewis, and K. Subbarao, "Sliding Mode Approach to Control Quadrotor Using Dynamic Inversion",Robust Control, Book 3, ed. A. Lazinica InTech publishing, Rijecka, Croatia, 2011.

Journal

  • Obradovic, B., Subbarao, K., "Modeling of Dynamic Loading of Morphing Wing Aircraft, AIAA Journal of Aircraft, Volume 48, Number 2, March-April 2011, pages 391-402.

Conference

  • Subbarao, K., Ahmed, M., "3D Target Tracking by UAVs subject to Measurement Uncertainties, IEEE Multi-conference on Systems and Control, Denver, CO, September 28-30, 2011
  • Petrich, J., Subbarao, K., "On-Board Wind Speed Estimation for UAVs, AIAA Guidance, Navigation and Control Conference, Portland, OR, August 8-11, 2011, Paper Number AIAA-2011-6223
  • Obradovic, B., Subbarao, K., "Design and Simulation of a Morphing Wing Controller with Actuator Loading Penalization", AIAA Atmospheric Flight Mechanics Conference, Portland, OR, August 8-11, 2011, AIAA-2011-6390
  • Bhatia, D., Subbarao, K., "Attitude Formation Control of Multiple Vehicles subject to Communication Constraints", AIAA Infotech Conference, St. Louis, Missouri, March 29-31, 2011
  • Ogunleye, I., Subbarao, K., "Stable Reference Trajectory Modification for Handling Actuator Saturation in Control Systems",AIAA Infotech Conference, St. Louis, Missouri, March 29-31, 2011
  • deVries, E., Subbarao, K., "Cooperative Control of Swarms of Unmanned Aerial Vehicles", 49th AIAA Aerospace Sciences Meeting and Conference, Orlando, FL, January 04-07, 2011
  • Subbarao, K., "Nonlinear Guidance and Information Consensus for UAVs with Time Varying Connection Topologies", 49th AIAA Aerospace Sciences Meeting and Conference, Orlando, FL, January 04-07, 2011

2010

Journal

  • Tadesse, Y. T., Subbarao, K., Priya, S., "Realizing a humanoid neck with serial chain four bar Mechanism", Journal of Intelligent Material Systems and Structures. (DOI: 10.1177/1045389X10378775) (pdf)

Conference

  • deVries, E., Subbarao, K., "Backstepping based Nested Multi-Loop Control Laws for a Quadrotor", 11th International Conference on Control, Automation, Robotics and Vision, ICARCV 2010, Singapore, December 07-10, 2010
  • Ahmed, M., Subbarao, K., "Nonlinear 3-D Trajectory Guidance for Unmanned Aerial Vehicles", 11th International Conference on Control, Automation, Robotics and Vision, ICARCV 2010, Singapore, December 07-10, 2010
  • Bhatia, D., Subbarao, K., "A Constrained Dynamical Systems Approach for Attitude Consensus of Multiple Rigid Bodies", 11th International Conference on Control, Automation, Robotics and Vision, ICARCV 2010, Singapore, December 07-10, 2010
  • Obradovic, B., Subbarao, K., "Modeling of Dynamic Loading of Morphing Wing Aircraft", AIAA Atmospheric Flight Mechanics Conference, Toronto, CA, August 2-5, 2010

2009

Journal

  • Subbarao, K., Goss, J., "Combined Magnetohydrodynamic and Geometric Optimization of a Hypersonic Inlet", International Journal of Aerospace Engineering, Hindawi Publishing Corporation, Volume 2009 (2009), Article ID 793647, 12 pages.
  • Das, A., Lewis F. L, Subbarao K., "Backstepping Approach for Controlling a Quadrotor using Neural Networks", Journal of Intelligent & Robotic Systems, Springer, Volume 56, Numbers 1-2, pages 127-151, September, 2009
  • Subbarao, K., Muralidhar P., "State observer for linear systems with piece-wise constant output delays", IET Control Theory & Applications (formerly IEE Proceedings Control Theory & Applications), Volume 3, Issue 8, pages 1017-1022, August 2009.
  • Subbarao, K., Shippey, B, "Low Thrust Earth Mars Trajectory Design using Pseudo-Spectral Methods and Genetic Algorithms", AIAA Journal of Guidance, Control and Dynamics, Vol. 32, No. 4, pages 1396-1401, July–August 2009
  • Subbarao, K., Vemuri, A., "Extrinsic Curvature based Fault Isolation for MIMO Systems", Trans. Of the Inst. Of Measurement and Control (Special Issue on Intelligent Fault Diagnosis and Prognosis for Engineering Systems), Volume 31 Issue 4, July 2009.
  • Gadewadikar, J., Lewis, F. L., Subbarao, K., Chen, B., Peng, K., "H-Infinity Static Output-Feedback Control for Rotorcraft", Journal of Intelligent & Robotic Systems, Springer, Volume 54, Number 4, pages 629-646, April, 2009
  • Das, A., Subbarao K., Lewis F. L, "Dynamic Inversion with Zero-Dynamics Stabilization for Quadrotor Control", IET Control Theory & Applications (formerly IEE Proceedings Control Theory & Applications), Volume 3, Issue 3, pages 303-314, March 2009.

Conference

  • Obradovic, B., Subbarao, K., “Modeling and Simulation to Study Flight Dynamics of a Morphable Wing Aircraft”, AIAA Modeling and Simulation Technologies Conference, 10-13 August 2009, Chicago, Illinois, Paper No. AIAA-2009-6240.
  • Parikh, K. K., Dogan, A., Subbarao, K., Huff B., Reyes, A. R., “CAE Tools for Modeling Inertia and Aerodynamic Properties of an R/C Airplane”, AIAA Modeling and Simulation Technologies Conference, 10-13 August 2009, Chicago, Illinois, Paper No. AIAA-2009-6043.
  • Menon, P.K., Tandale, M.D., Kim, J., Sengupta, P., Rosenberger, J., Subbarao, K., “Stochastic air traffic flow models of the US national airspace system” IISc Centenary International Conference and Exhibition on Aerospace Engineering, Bangalore, India Invited Paper, May 2009.
  • Subbarao, K., Supekar, A., Lawrence, K., “Investigation of Morphable Wing Structures for Unmanned Aerial Vehicle Performance Augmentation”, AIAA Infotech@Aerospace Conference, Seattle, WA, April 2009, Paper No. AIAA-2009-1829.

2008

Book Chapters

  • Das, A., Lewis, F., L., and Subbarao, K., “Back-stepping control of Quadrotor, a Higher Order Like Neural Network Approach”, submitted as a book chapter in Artificial Higher Order Neural Networks for Computer Science and Engineering: Trends for Emerging Applications, IGI Global, Dr. Ming Zhang (Editor).
  • Das, A., Lewis, F., L., and Subbarao, K., “Quadrotor Control by Dynamic Inversion with Zero-dynamics Stabilization”, Chapter in Computational Intelligence, Control and Computer Vision in Robotics and Automation. Bidyadhar Subudhi (Editor), Narosa Publishing House, New Delhi.
  • Dang, P., Lewis, F. L., Subbarao, K., Stephanou, H. E., “Optimal Placement of Microactuators for Distributed Control using Neural Networks”, Chapter in Recent Advances in Control Systems, Robotics, and Automation, 2 ed., edited by S. Pennacchio, pp. 29-36, International SAR, Palermo, Italy, 2008.

Journal

  • Subbarao, K., Welsh, S. J., “Nonlinear Control of Motion Synchronization for Satellite Proximity Operations,” AIAA Journal of Guidance, Control & Dynamics. Vol. 31, No. 5, September - October, 2008.
  • Gadewadikar, J., Lewis F. L., Subbarao, K., Chen, B., “Design of H-Infinity Command & Control Loops for Unmanned Aerial Vehicles using Static Output Feedback”, AIAA Journal of Guidance, Control and Dynamics. Vol. 31, No. 4, pp. 1093-1102, July-August, 2008.
  • Dang, P., Lewis, F. L., Subbarao, K., Stephanou, H. E., “Optimal Placement of Microactuators for Distributed Control using Neural Networks”, Int. Journal of Factory Automation, Robotics, and Soft Computing, Vol. 1, pp. 27-34, Jan. 2008.

Conference

  • Tandale, M. D., Sengupta, P., Menon, P. K., Cheng, V. H., J, Rosenberger, J., Subbarao K., “Queuing Network Models of the National Airspace System”, The 26th Congress of International Council of the Aeronautical Science Including The 8th AIAA Aviation Technology, Integration and Operations, Anchorage, Alaska, USA, September 14-19, 2008.
  • Kim, J., Palaniappan, K., Menon, P. K., Nag, M., Subbarao K., “Trajectory Uncertainty Modeling for Queuing Analysis of the National Airspace System”, The 26th Congress of International Council of the Aeronautical Science Including The 8th AIAA Aviation Technology, Integration and Operations, Anchorage, Alaska, USA, September 14-19, 2008.
  • Goss, J. D., and Subbarao, K., “Inlet Shape Optimization Based on POD Model Reduction of Euler Equations”, 12th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, Victoria, British Columbia, Canada, September 10-12, 2008.
  • Das, F. Lewis and S. Subbarao, "Dynamic Neural Network based Robust Backstepping Control approach for Quadrotors", Proceedings of AIAA Guidance, Navigation and Control Conference and Exhibit, 18-21 August, 2008, Honolulu, Hawaii.
  • Das, A., Subbarao, K., Lewis, F. L., “Dynamic Inversion of Quadrotor with Zero-Dynamics Stabilization”, IEEE Multi-conference on Systems and Control, San Antonio, TX, USA, September 3-5, 2008.
  • Shippey, B., and Subbarao, K., “Trajectory Design using Collocation and Genetic Algorithms: Aircraft Turning Maneuver”, IEEE Multi-conference on Systems and Control, San Antonio, TX, USA, September 3-5, 2008.
  • Dang, P., Lewis, F. L, Subbarao, K., Stephanou, H., “Shape Control of Flexible Structure using Potential Field Method”, IEEE Multi-conference on Systems and Control, San Antonio, TX, USA, September 3-5, 2008.
  • Subbarao, K., and Muralidhar, P., “A State Observer for LTI Systems with Delayed Outputs: Time-Varying Delay”, Proceedings of the American Control Conference, Seattle, Washington, USA, June 11-13, 2008.
  • P. Singla and K. Subbarao, “Stable Adaptive Reference Trajectory Modification for Saturated Control Applications,” Proceedings of 2008 American Control Conference, Seattle, Washington, USA, June 11 - 13, 2008.
  • Goss, J. D., and Subbarao, K., “Adjoint Methods for Inlet Shape Optimization”, AIAA 2008-4381, AIAA 38th Fluid Dynamics Conference and Exhibit, June 23-26, 2008, Seattle, Washington, USA.

2007

Journal

  • Singla P., Subbarao K., Junkins J. L., “Direction Dependent Learning Approach for Radial Basis Function Networks,” IEEE Transactions of Neural Networks. Vol. 18, pp. 203-222, January 2007.

Conference

  • Matusewicz, J., Subbarao, K., Frisbee, J., “Uncertainty Characterization of Orbital Debris using Simulated Space Surveillance Network Measurements”, AAS 07-388, AAS/AIAA Astrodynamics Specialist Conference, Mackinac Island, MI, August 2007.
  • Matusewicz, J., Subbarao, K., Frisbee, J., “Uncertainty Characterization of Orbital Debris using the Extended Kalman Filter”, AAS 07-389, AAS/AIAA Astrodynamics Specialist Conference, Mackinac Island, MI, August 2007.
  • Vibheeshanan, V. J, Subbarao, K., Huff, B., “A Sensor Calibration Methodology for Evidence Theoretic Unmanned Ground Vehicle Localization”, IEEE International Symposium on Computational Intelligence in Robotics and Automation,t Jacksonville, Florida, USA, June 2007.
  • Vibheeshanan, V. J, Subbarao, K., Huff, B. “Eta-Filter: An Evidence Theoretic Approach to Unmanned Ground Vehicle Localization”, (BEST PAPER AWARD) , IEEE International Symposium on Computational Intelligence in Robotics and Automation, Jacksonville, Florida, USA, June 2007.
  • P. L. Narasimha, Z. Yue, K. Subbarao, M. T. Manry, P. Topiwala, “Real-Time Object-Based Image Registration Using Improved MRAN”, Multisensor, Multisource Information Fusion: Architectures, Algorithms, and Applications 2007. Edited by Dasarathy, Belur V. Proceedings of the SPIE, Volume 6571, pp. 657103 (2007).
  • J. Gadewadikar, F. L. Lewis, K. Subbarao, B. Chen, “Design of H-Infinity Command and Control Loops for Unmanned Aerial Vehicles Using Static Output-Feedback”, Proceedings of the 46th IEEE Conference on Decision and Control, New Orleans, LA, USA, December 12-14, 2007, pages 5395-5400.
  • J. Gadewadikar, F. L. Lewis, K. Subbarao, B. Chen, “Attitude Control System Design for Unmanned Aerial Vehicles using H-Infinity and Loop-Shaping Methods”, Proceedings of the IEEE International Conference on Control and Automation 2007, Guangzhou, China, Page(s): 1174-1179.
  • K. Subbarao, A. Vemuri, “Fault Isolation using Extrinsic Curvature for Multi-Input-Multi-Output Systems with Nonlinear Fault Models”, Proceedings of the American Control Conference, 2007, New York, USA.

2006

Journal

  • Singla P., Subbarao K., Junkins J. L., “Adaptive Output Feedback Control for Spacecraft Rendezvous and Docking Under Measurement Uncertainty,” AIAA Journal of Guidance, Control and Dynamics, Vol. 29, No. 4, pp. 892 – 898, July – August 2006.

Conference

  • A. Vemuri, K. Subbarao, “Fault Isolation using Extrinsic Curvature of Nonlinear Fault Models”, accepted, 9th International Conference on Control, Automation, Robotics and Vision (IEEE), Singapore, December 5-8, 2006, Singapore.
  • J. Gadewadikar, K. Subbarao, F. L. Lewis, B. Chen, K. Peng, “H-Infinity Static Output-Feedback Control for Rotorcraft”, AIAA-2006-6238, AIAA Guidance, Navigation and Control Conference and Exhibit, Keystone, CO, Aug., 2006.
  • Webb, M.B. and Subbarao, K., “On the Dynamic Aeroelastic Stability of Morphable Wing Structures,” 14th AIAA/ASME/AHS Adaptive Structures Conference, Newport, Rhode Island, May, 2006.

2005

Journal

  • M. B. Webb and Kamesh Subbarao, “Mathematical Modeling for Modal Computations Concerning a Morphable Wing,” AIAA Journal of Aircraft, Vol. 43, No. 3, pp. 849-853, March 2005.
  • Akella M. R., Subbarao K., “A Novel Parameter Projection Mechanism for Smooth and Stable Adaptive Control”, System and Control Letters, Elsevier, Vol. 54, No. 1, pages 43 – 51, January 2005.

Conference

  • Kamesh Subbarao, Jonathan McDonald, “Multi-Sensor Fusion based Relative Navigation for Synchronization and Control of Free – Flying Robotic Spacecraft,” AIAA Guidance, Navigation, and Control Conference and Exhibit, San Francisco, CA, Aug., 2005.
  • Kamesh Subbarao, Praveen Muralidhar, “Cooperative Control of UAVs in Dynamic Pursuit Subject to Communication Delays,” AIAA Guidance, Navigation, and Control Conference and Exhibit, San Francisco, CA, Aug., 2005.
  • Byron Webb and Kamesh Subbarao, “A Mathematical Model for the Investigation of the Mode Shape Morphology of a Morphable Wing,” AIAA Region IV Student Conference, Albuquerque, NM, 7-9, April, 2005.
  • Jennifer D. Goss and Kamesh Subbarao, “Inlet Optimization for High Mach Number Flows with Magnetohydrodynamics Effects,” AIAA Region IV Student Conference, Albuquerque, NM, 7-9, April, 2005. (Paper won second prize)
  • Kamesh Subbarao, Brian Dennis, Jennifer Goss, “Optimal Location and Sizing of Synthetic Jet Actuators for Virtual Aerodynamic Shaping,” AIAA-2005-4766, 43rd AIAA Aerospace Sciences Meeting and Exhibit Reno, Nevada, Jan 2005.

2004

Journal

  • Subbarao, K., Akella, M. R., “Differentiator Free Nonlinear Proportional-Integral Controllers for Rigid Body Attitude Stabilization”, AIAA Journal of Guidance, Control and Dynamics, Vol. 27, No. 6, pages 1092 – 1096, Nov – Dec, 2004.
  • Subbarao K., “Nonlinear PID-like Control for Spacecraft Attitude Regulation”, Journal of Astronautical Sciences, Volume 52, Issue #1 & 2, January-June 2004

Conference

  • Kamesh Subbarao, Atilla Dogan, “Intelligent Integrated Sensor, Control and Maneuver Mapping Architecture for Autonomous Vehicle Rendezvous and Docking,” AIAA-2004-6573, AIAA Unmanned, Unlimited Conference, Chicago, IL, Sept 2004. (Paper was subsequently included as part of Technical Kit for the AIAA InfoTech Conference, 2006)
  • Goss, J. D., Rajvanshi, R., Subbarao, K., “Aircraft Conflict Detection and Avoidance Using Mixed Geometric and Collision Cone Approaches,” AIAA-2004-4879, AIAA Guidance, Navigation, and Control Conference and Exhibit, Providence, Rhode Island, Aug. 16-19, 2004.
  • Welsh, S. J., Subbarao, K., “Adaptive Synchronization and Control of Free Flying Robots for Capture of Dynamic Free-Floating Spacecrafts,” AIAA-2004-5298, AIAA/AAS Astrodynamics Specialist Conference and Exhibit, Providence, Rhode Island, Aug. 16-19, 2004.
  • Subbarao K., Akella M. R., “Stable PI like Control Structures for a Class of Nonlinear Systems”, AAS/AIAA Spaceflight Mechanics Meeting, Maui, Hawaii, February 8-12, 2004.
  • Singla P., Griffith T., Subbarao K., Junkins J., “Autonomous Focal Plane Calibration Using Intelligent Radial Basis Function Networks”, AAS/AIAA Spaceflight Mechanics Meeting, Maui, Hawaii, February 8-12, 2004.
  • Tandale M., Subbarao K., Valasek J., Akella M. R., “Structured Adaptive Model Inversion Control with Actuator Saturation Constraints Applied to Tracking Spacecraft Maneuvers”, American Control Conference, Boston, July, 2004.
  • Singla P., Subbarao K., Rediniotis O. K., Junkins J. L., “Intelligent Radial Basis Function Networks For Multiresolution Modeling: Application to Synthetic Jet Actuation and Flow Control”, 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, 5-8 Jan 2004.

2003

Book Chapters

  • Subbarao, K., (2 Chapters) – “Integral Control”, “Derivative Control” – Process Control Circuits, NIIT (National Institute of Information Technology) Limited, New Delhi, 2003

Before September 2003Journal

  • Subbarao K., Junkins J. L., “Structured Model Reference Adaptive Control for a Class of Nonlinear Systems”, AIAA Journal of Guidance, Control and Dynamics, Vol. 26, No. 4, July-August 2003.
  • Junkins J. L., Subbarao K. and Verma, A., “Structured Adaptive Control for Poorly Modeled Nonlinear Dynamical Systems”, Computer Modeling in Engineering & Sciences, Vol. 1, No. 4, 2000.
  • Pradeep S. and Subbarao K., “Does the Phugoid Frequency Depend on Speed?” AIAA Journal of Guidance, Control and Dynamics, Vol. 22, No. 2, pp. 372-373 Mar-Apr 1999.
  • Subbarao K. and Pradeep S., “The Phugoid Approximation Re-visited”, AIAA Journal of Aircraft, Vol. 35, No. 6, Nov-Dec 1998.

Conference

  • Subbarao K., “The Attitude Control Problem, Re-Visited”, John L. Junkins Astrodynamics Symposium, College Station, TX, 23-24 May 2003, AAS 03-263.
  • Singla P., Subbarao K., Hughes D., Junkins J. L., “Structured Model Reference Adaptive Control For Vision Based Spacecraft Rendezvous and Docking Problem”, AAS/AIAA Space Flight Mechanics Meeting, Ponce, Puerto Rico, Feb 9-13, 2003, AAS 03-103.
  • Wilkins, M. P., Subbarao, K., Alfriend, K. T., Vadali, S. R., “Modeling and Simulation of a Powersail” AIAA/AAS Astrodynamics Specialist Conference and Exhibit, 5 – 8 August, 2002, Monterey, CA, AIAA 2002-4519.
  • Subbarao K., Verma A., Junkins J., “Model Reference Adaptive Control of Constrained Robotic Manipulators”, IEEE Conference on Control Applications, Mexico City, Mexico, 4-6 September, 2001.
  • Subbarao K., Steinberg M., Junkins J. L., “Structured Adaptive Model Inversion Applied to Tracking Aggressive Aircraft Maneuvers”, AIAA Guidance Navigation and Control Conference, Montreal Quebec Canada, Aug 6-9, 2001.
  • Subbarao K., Vadali S. R., Alfriend K. T., Junkins J. L., “A novel control design methodology for maintaining position and attitude of a Powersail”, AAS/AIAA Space Flight Mechanics Meeting, Santa Barbara, CA, Feb 11-14, 2001. AAS 01-229.
  • Verma A., Subbarao K. and Junkins, J.L., “A Novel Trajectory Tracking Methodology using Structured Adaptive Model Inversion for UAVs”, 2000 American Control Conference, Chicago, IL, June 28-30, 2000.
  • Subbarao, K., Verma, A., and Junkins, J.L., “Structured Adaptive Model Inversion Applied to Tracking Spacecraft Maneuver”, AAS/AIAA Space Flight Mechanics Meeting, Clearwater, FL, Jan 23-26, 2000.
  • Junkins J. L., Subbarao K. and Verma, A., “Structured Adaptive Control for Poorly Modeled Nonlinear Dynamical Systems”, Invited Plenary Lecture, International Conference on Computational Engineering Sciences, ICES 2000, Anaheim, CA.
  • Akella M.R., Subbarao K. and Junkins J.L., “Non-linear Adaptive Autopilot for Uninhabited Aerial Combat Vehicles”, AIAA Atmospheric Flight Conference, Portland OR, August '99, AIAA-99-4218.
  • Subbarao K. and Pradeep S., “Refined Phugoid Approximations for Conventional Aircraft”, AIAA Atmospheric Flight Conference, Boston, MA, Aug '98, AIAA-98-4269.
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