Switching control for autonomous rendezvous to non-cooperative target

For the spacecraft relative orbit dynamical system respect with respect to non-cooperative target, the switching control problem based on line of sight (LOS) guidance is investigated. A nonlinear LOS relative motion dynamics model is established, and the gravity difference term is analyzed qualitatively. Based on the phase plane method, the switching cure control methods of the lateral and longitudinal relative motion channels are designed separately. For the lateral control channel, a switching curve strategy based on the proportional guidance law is given, and the stability is guaranteed by the method of Lyapunov. For the longitudinal control channel, the double switching curve is adopted, and a design method is given. Numerical simulation results validate the fine performance of the proposed control schemes.