Continuous-Time Model Identification of Magnetostrictive Actuator

A continuous-time model identification method from sample data with high-frequency colored noise is presented. The method is applied to the continuous-time model identification of magnetostrictive actuator. By introducing an integral operation, the differential equations of continuous-time system can be transformed into integral equations so that the effect of the noise can be eliminated and that a continuous-time model can be estimated directly by using conventional LS methods. Simulation example demonstrates the effectiveness and the feasibility of the presented method. The identified continuous-time model of the magnetostrictive actuator has high reliability.