An actuator control system based on DSP( Digital Signal Processor) and CPLD( Complex Programmable Logic Device) is designed. The hardware circuits consists of controller, drive circuits, signals detection circuits and protection circuits, detecting of these circuits has been accomplished. Three closed loop PI algorithm is used and the PI parameters have been adjusted.Using the controller combined by DSP and CPLD not only simplifies the peripheral circuits of DSP, but also reduces the computing resources con...