This paper describes the preliminary concept for the RCS 3-axis attitude controller for the exoatmospheric and guided entry phases of the Mars Science Laboratory Entry, Descend and Landing. The entry controller is formulated as three independent channels in the control frame, which is nominally aligned with the stability frame. Each channel has a feedfoward and a feedback. The feedforward path enables fast response to large bank commands. The feedback path stabilizes the vehicle angle of attack and sideslip around its trim position, and tracks bank commands. The feedback path has a PD/D structure with deadbands that minimizes fuel usage. The performance of this design is demonstrated via simulation.
Entry Attitude Controller for the Mars Science Laboratory
2007-03-01
6251926 byte
Conference paper
Electronic Resource
English
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