Fault-tolerant Control of Spacecraft Dynamic System Based on Control Network
Guan Xinping · Control Engineering of China · 2011
The fault-tolerant control problem of the spacecraft lateral dynamics system with time-varying delay states based on networked control is studied.Combining with the characteristics of the networked control system(NCS),a controller to stabilize the system with actuator failure is proposed based on robust integrity method by using Lyapunov stabilization theory together with the LMI technique.The spacecraft dynamic system is modeled as a linearized plant with time-varying state delay.Then considering the characteristics of the NCS induced delay and the data dropout,a piecewise constant controller is adopted to design the controller against the actuator failure.The simulation results show that the system performance can be guaranteed well under the proposed fault tolerant controller when the actuator failure appears.