A RLV nonlinear optimal compound controller design

摘要: The reusable launch vehicle (RLV) has strongly nonlinear, fast time-varying characters and multiple control modes, which challenge attitude in task-adaptability greatly. A nonlinear RCS/aerosurfaces compound controller scheme was presented. First a RLV model equipped with reaction system (RCS) aerosurfaces is developed. Then slow loops designed based on time-scale separate theory. optimal law implemented to generate moments. allocation maps the moment commands into thrusters aerodynamic effectors' commands. daisy-chain combination method applied deal harmonization problem of RCS aerosufaces. Results show meets tracking performance requirements. Simulation demonstrates that saves fuel effectively achieves coordinated between aerosurfaces. can also be used other reentry vehicles or aerospace planes.