Optimal Guidance Command Generation and Tracking for Reusable Launch Vehicle Reentry
Bollino, Kevin P.
Oppenheimer, Michael W.
Doman, Dave D.
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The objective of this work is to develop a robust guidance and control architecture for autonomous reusable launch vehicles that incorporates elements of recent advances in the areas of optimal trajectory generation and reconfigurable control. This work integrates three separately developed methods to form a coherent architecture with the potential to manage control effectors failures, vehicle structural/aerodynamic degradation, uncertainty, and external disturbances. Outer-loop guidance commands in the form of body-frame angular rates (roll, pitch, and yaw) are generated from an optimal reference trajectory that is computed off-line with a direct pseudospectral method and then tracked by a reconfigurable inner-loop control law. The appropriate open-loop state histories from the psuedo-four-degree-of-freedom reference trajectory are converted using a modified back stepping approach that complements the inner-loop control law in a six-degree-of freedom simulation. The inner-loop control law is capable of reacting and compensating for off-nominal conditions by employing nonlinear reconfigurable control allocation, dynamic inversion, and model-following/anti-windup prefilters. The results show that the inner-loop control can adequately track the desired optimal guidance commands; thus, confirming the applicability of this control architecture for future development involving on-line, optimal trajectory generation and high-fidelity guidance and control for reentry vehicles.
The article of record as published may be located at http://arc.aiaa.orgProceedings of AIAA-Guidance, Navigation, and Control Conference and Exhibit ; Paper no. AIAA-2006-6691, Keystone, Colorado, Aug. 21-24, 2006
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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Bollino, Kevin P. (Monterey, California.: Naval Postgraduate School, 2006., 2006-12);Creating simplicity out of complexity, this research abandons the traditional guidance and control architecture for aerospace vehicles and embraces a revolutionary concept based on the principles of nonlinear optimal ...
Bollino, Kevin; Ross, I. Michael; Doman, Dave (The American Institute of Aeronautics and Astronautics (AIAA), 2006-08-21);It is well-known that onboard, real-time, optimal trajectory generation for reusable launch vehicles can substantially increase safety while reducing cost. Arguably, this is one of the most challenging problems in optimal ...
Shaffer, Patrick J.; Ross, I. Michael; Oppenheimer, Michael W.; Doman, David B. (The American Institute of Aeronautics and Astronautics (AIAA), 2005-08-15);Autonomous reusable launch vehicles (RLV) are being pursued as low-cost alternatives to expendable launch vehicles and the Shuttle. The employment of autonomous, reusable launch vehicles requires additional guidance and ...