The fuzzy variable structure control of spacecraft attitude networked control systems

To employing a bus for share data will be a direction of the spacecraft system. Based on the network-induced delay, nonlinearity and uncertainty of the spacecraft attitude networked control system model, a variable structure fuzzy control method is proposed. The fuzzy system is used to approximate the system uncertainty function. Furthermore, the errors due to fuzzy approximation and external disturbances are compensated so that the influence on the system is minimized. On the other hand, according to the design of the sliding modal, the effect of network-induced delay on the spacecraft attitude networked control systems is reduced. Theoretical analysis and simulation results show that the proposed control method has advantage of high tracking accuracy, low computation load, and robustness to network-induced delay, and is easy of engineering application.