Design of satellite antenna pointing servo control system based on adaptive variable structure with sliding model controller

Adaptive sliding mode control (ASMC) method was applied in satellite antenna tracking and pointing servo system. Space vector pulse width modulation (SVPWM) technique was used to drive permanent magnet synchronous motor (PMSM) in current loop. The external position loop was designed with ASMC that the adaptive method was used to regulate the parameters of equivalent control variable in controller in order to reduce the outside disturbance and inside parameters' affection on system. The simulation result demonstrates that the servo system has a high control performance, steady output and strong robustness.