Robust rebound suppression control for push-pull solenoid considering the characteristic change during operation

This paper is concerned with an advanced drive control system for a push-pull solenoid. The temperature of the solenoid is increased in the steady state of a process in operation after a time-duration. Then, the rebound of a plunger in the solenoid is increased with the raising of the temperature. In this study, it was confirmed that the rebound is influenced by the stiffness of the rubber that receives the plunger, and the stiffness is changed due to the temperature of the solenoid. Therefore, a rebound suppression control for the solenoid to be used in the steady operation after several hours is proposed in this paper. In this approach, the solenoid is mathematically modeled and the model parameters are identified by using the data for both the initial state of a process at the start-up of the operation and the steady state of a process in operation after a time-duration. Input pulsed timing is robustly designed based on the solenoid model considering the steady state of a process in operation after a time-duration. Finally, the effectiveness of the proposed approach is demonstrated through experiment.