Pseudospectral Optimal Control
Costate Computation by a Chebyshev Pseudospectral Method, Journal of Guidance, Control, and Dynamics, March-April 2010.
Our optimal control software has revitalized research conducted in the world of autonomous path planning and intelligent robotics. Some recent breakthroughs in this field can be found in:
An Info-Centric Trajectory Planner for Unmanned Ground Vehicles, Book Chapter in Dynamics of Information Systems: Theory and Applications, 2009.
Pseudospectral Optimal Control: A Clear Road for Autonomous Intelligent Path Planning, Proceedings of AIAA- Infotech@Aerospace Conference and Exhibit, Paper# AIAA-2007-2831, 2007.
Research work using Elissar Global products has also lead to a revolutionary optimal feedback control method that is implementable on virtually any system.
Elissar Global products have been most extensively utilized in space applications. The general-purpose feature of our software products has made it possible to solve virtually every optimal control problem that can be mathematically formulated. Some examples of such space-related problems solved by the research community over the past decade are listed below:
Zero-Prop Maneuver Space Station Demonstration, Proceedings of AIAA-Guidance, Navigation, and Control Conference and Exhibit, 2007.
Time-Optimal Nonlinear Feedback Control for the NPSAT1 Spacecraft, Proceedings of IEEE/ASME International Conference on Advanced Intelligent Mechatronics, pp. 843-850, 2005.
Spacecraft Entry Guidance
Optimal Trajectory Reconfiguration and Retargeting for Reusable Launch Vehicles, Journal of Guidance, Control, and Dynamics, 30 (6), 1794-1802, 2007.
A Pseudospectral Feedback Method for Real-Time Optimal Guidance of Reentry Vehicles, Proceedings of American Control Conference, pp.3861-3867, 2007.
Optimal Guidance Command Generation and Tracking for Reusable Launch Vehicle Reentry, Proceedings of AIAA-Guidance, Navigation, and Control Conference and Exhibit, Paper # AIAA-2006-6691, 2006.
Spacecraft Formation Design and Control
Design and Control of Libration Point Spacecraft Formations,Journal of Guidance, Control, and Dynamics, 30 (4), pp.899-909, 2007.
Designing Optimal Spacecraft Formations, Proceedings of AIAA/AAS - Astrodynamics Specialist Conference, Paper # AIAA-2002-4635, 2002.
Direct Trajectory Optimization by a Chebyshev Pseudospectral Method, Journal of Guidance, Control, and Dynamics, 25 (1), pp.160-166, 2002.
Space Trajectory Optimization and L1-Optimal Control Problems, Modern Astrodynamics, pp. 155-188, 2006.
A Perspective on Methods for Trajectory Optimization, Proceedings of AIAA/AAS- Astrodynamics Specialist Conference, Paper # AIAA-2002-4727, 2002.
Optimal Trajectories for Soft Landing on Asteroids, AE8900 MS Special Problems Report, Georgia Institute of Technology, 2006.
Optimization of Mission Design for Constrained Libration Point Space Mission, Ph.D. dissertation, Stanford University, 2005.
Elissar Global products have been used in many air-system applications. Below is a sample list of the most recent works:
Collision-Free Multi-UAV Optimal Path Planning and Cooperative Control for Tactical Applications, AIAA Guidance, Navigation and Control Conference and Exhibit, Paper # AIAA-2008-7134, 2008.
Optimal Path Planning and Control of Tactical Unmanned Aerial Vehicles in Urban Environments, Proceedings of AUVSI's Unmanned Systems North America, 2007.
Optimal Trajectory of a Glider in Ground Effect and Wind Shear, Proceedings of AIAA Guidance, Navigation, and Control Conference, Paper # AIAA-2005-6474, 2005.
Optimal Trajectory of a Glider in Ground Effect and Wind Shear, Proceedings of AIAA Guidance, Navigation, and Control Conference, Paper# AIAA-2005-6474, 2005.
Minimum Fuel Circling for an Unmanned Aerial Vehicle, Proceedings of JSASS-KSAS Joint International Symposium on Aerospace Engineering, vol. 43, Nagoya, Japan, 2005.
Issues on UGV Optimal Motion Planning and Obstacle Avoidance, AIAA Infotech@Aerospace Conference and Exhibit and AIAA Unmanned...Unlimited Conference and Exhibit, 2009.
An Info-Centric Trajectory Planner for Unmanned Ground Vehicles, International Conference on the Dynamics of Information Systems, 2009.
Autonomous Trajectory Planning Using Real-Time Information Updates
Pseudospectral Motion Planning Techniques for Autonomous Obstacle Avoidance, 46th IEEE Conference or Decision and Control, 2007.
Optimal Control of an Undersea Glider in a Symmetric Pull-Up, Virginia Center for Autonomous Systems Report No. 2008-03, 2008.