Design of coupled controller based on ballistic and attitude

In this paper, an augmentation strategy is designed for the steady-state error caused by the coupling between ballistic and attitude. It can process and transform a class of nonlinear systems. Based on this, a slip form controller is designed. In the design process of the controller, a sliding surface that can be damped is calculated, and precise control of the system is realized. Then it is applied to the attitude control of the reentry vehicle, which effectively solves the problem of attitude angle control accuracy caused by the coupling between the ballistic and the attitude.