Comparison of Guidance Methods forAutonomous Planetary Lander

[摘要] Guidance methods for a powered descent planetary lander are examined. Severalguidance laws are developed and analyzed including Apollo derived, modified Apollo,time efficient and fuel efficient methods. These laws are implemented using twodifferent methods: Apollo approach, and real time. The equations of motion for anarbitrary planetary lander with sloshing fuel and a gimbaled nozzle are derived using aNewtonian approach. A six degree of freedom (6DOF) simulation of the vehicle systemdynamics is programmed in Simulink to test the various guidance methods. Theguidance methods are assessed using several different trajectories.

[发布机构] Rice University

[效力级别] engineering