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• W1972091143 abstract "Robust performance of a flight control system in the presence of parametric uncertainty and external disturbances is of paramount importance to a successful planetary exploration program. The present research is concerned with the design of an autopilot that uses high-order sliding mode (HOSM) control principles so as to enhance the robustness properties of a lunar landing vehicle during the approach phase of powered descent. The design technique is applied to a high-fidelity simulation of the Apollo Lunar Module (LM). The design efficiently utilizes both the reaction control system (RCS) actuators and the severely rate-limited gimbal drive actuator (GDA) to effect smooth detection and compensation of sensed angular acceleration disturbances about the vehicle's control axes. The integration of a HOSM control law for the RCS effectors with a HOSM disturbance observer is shown to provide performance comparable to that of the heritage autopilot and may also avoid some difficulties encountered in the Apollo flights. Performance is maintained with the controller implemented in discrete time in the presence of a realistic vehicle and sensor model, demonstrating a unique application of sliding mode control to a complex aerospace system." @default.
• W1972091143 created "2016-06-24" @default.
• W1972091143 creator A5016345401 @default.
• W1972091143 creator A5049834624 @default.
• W1972091143 date "2012-03-01" @default.
• W1972091143 modified "2023-09-27" @default.
• W1972091143 title "Lunar spacecraft powered descent control using higher-order sliding mode techniques" @default.
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• W1972091143 doi "https://doi.org/10.1016/j.jfranklin.2011.06.015" @default.
• W1972091143 hasPublicationYear "2012" @default.
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