Design and simulation for dual-stage actuator systems with multi-rate and friction compensation controller

This paper studies the structure and model of a dual-stage actuator (DSA) control system. A multi-rate controller with friction compensation is designed to reduce the computational load, which will greatly improve the system´s performance. The dual-stage actuator(DSA)control system consists of a linear motor and a piezoelectric actuator. By combining the system with properly designed control method, the two actuators are complementary to each other, so that the system can achieve fast response and high precision to meet the requirements in industry. The multi-rate control law can decrease the computational load with a slower update rate about the primary actuator, but the performance of the whole system is not descending. A Simulink platform for dual-stage actuator (DSA) control system is developed in this brief, the platform is applied to test the influence of the ratio m on whole system performance. Experimental results sufficiently demonstrate the usefulness of the dual-stage actuator (DSA) control system, as well as the effectiveness of the mentioned algorithm.