Research and Simulation Analysis on Control Algorithm of Eddy Current Damper

Abstract

With the rapid development of the national economy, the mechanical vibration occurring in a high-speed rotary machine may affect or restrict the normal operation of the system and cause immeasurable losses in production and life. In this paper, a self-sensing eddy current damper is proposed and applied to a rotating disk vibration system to realize the active control of vibration. The mechanism and application of self-sensing eddy current damper are mainly studied from the theoretical research and simulation of control algorithm. Based on the theory of eddy current and electromagnetic force generation, the working principle of self-sensing eddy current damper is analyzed based on the theory of double-coil transmission eddy-current detection. The relationship between the vibration displacement and the input and output of the damper is explored. The correctness of the theoretical modeling is verified. The controller based on H∞ method is designed with robust control theory and the controller feedback gain K (s) is analyzed. According to the control structure of the system, simulink simulation model is designed to simulate the rotating disk vibration system with different rotating speed. The vibration displacement responses before and after the control are compared and analyzed. The simulation results show that the designed controller can effectively reduce the lateral vibration of the rotating disk. The verification experiment of self-sensing eddy current damper and the active control experiment of the rotating disk vibration system are carried out. The experimental results are in good agreement with the simulation results.