Coqoperative Control of Two Active Spacecraft during Proximity Operations
نویسندگان
چکیده
A cooperative autopilot is developed for the control of the relative attitude, relative position, and absolute attitude of two maneuvering spacecraft during on orbit proximity operations. The autopilot consists of a open-loop trajectory solver which computes a nine dimensional linearized nominal state trajectory at the beginning of each maneuver and a phase space regulator which maintains the two spacecraft on the nominal trajectory during coast phases of the maneuver. A linear programming algorithm is used to perform jet selection. Simulation tests using a system of two space shuttle vehicles are performed to verify the performance of the cooperative controller and comparisons are made to a traditional "passive target / active pursuit vehicle" approach to proximity operations. The cooperative autopilot is shown to be able to control the two vehicle system when both the would be pursuit vehicle and the target vehicle are not completely controllable in six degrees of freedom. The cooperative controller is also shown to use as much as 37% less fuel and 57% fewer jet firings than a single pursuit vehicle during a simple docking approach maneuver. Thesis Supervisor: Title: Technical Supervisor: Title: Professor Walter M. Hollister Professor of Aeronautics and Astronautics, M.I.T Edward V. Bergmann Section Chief, Flight Systems Section Charles Stark Draper Laboratory
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تاریخ انتشار 2008