Research on a New Type of Piezoelectric Electro-hydraulic Servo Valve Based on Fuzzy PID Control

A new type of piezoelectric direct drive electro-hydraulic valve is developed in this paper.The Fuzzy PID control method proposed in this paper can solve hysteresis nonlinear and satisfy the demand of the control system well.Experiment results have confirmed that the performance of the new type piezoelectric direct drive electro-hydraulic valve is superior to conventional electro-hydraulic valve.