Design of an Autonomous Stationkeeping Controller for LES-8/9.
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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The report describes the design of the controller and digital filter for the LES-89 autonomous stationkeeping system. The design goals are to maintain a station with plus or minus 0.15 deg. accuracy with an efficient thruster fuel usage and execute automatic station changes when necessary at a controlled coasting speed. These goals are accomplished by using a time-varying eighth-and sixteenth-order filter, and a non-linear controller with switching zones. The final design is optimized taking into account stochastic nature of the navigation error. The controller parameters and filters can be altered in orbit to achieve the optimum performance for the navigation error seen in orbit. Author
- Unmanned Spacecraft
- Spacecraft Trajectories and Reentry