An Observer-Based Backstepping Controller for Spacecraft Attitude Control System

In this paper an observer-based controller is developed for continuous-time spacecraft attitude control system. Firstly, a high gain observer is created for the system model. Then, the estimated states are used to generate a backstepping controller to regulate the performance of sate variables to the desired states. Then, the nonlinear closed loop control system is simulated to demonstrate the effectiveness of the developed control approach in regulating the performance of the system to the desired steady state.