Gain-scheduled reusable launch vehicle attitude controller design

A new kind of gain-scheduled attitude controller for reusable launch vehicle is presented. In this paper, gain-scheduled controller design is finished without considering small perturbation linearization. Simultaneously, coordinated scheduling controller is used to deal with intentionally cross coupling. This framework is applied to the design of coupling between roll, pitch and yaw of reusable launch vehicle with large angles of attack. Firstly, single channel gain-scheduled controller is designed, and then coordinated gain-scheduled controller is used to cancel the inter-channel aerodynamic cross coupling. The nonlinear six-degree-of-freedom simulation results validate that the methods can reduce the cross couplings significantly under system performance requirements.