Adaptive Fault-Tolerant Tracking Control of Flexible Spacecraft against Actuator Failures

This paper studies an actuator boundary fault compensation problem for flexible spacecrafts, using a model transform based direct adaptive control technique. In order to portray the strong coupling characteristics of flexible vibration and rigid motion precisely, the overall system dynamics is modeled by an interconnected partial differential equation-ordinary differential equation. By introducing a new auxiliary signal, a pioneering adaptive fault-tolerant boundary control scheme is put forth. The complete closed-loop system stability is ensured by using the modified direct Lyapunov method.