Optimal control of hydraulic position system employing high speed On/Off solenoid valve

Abstract

A hydraulic position system was designed employing two high speed On/Off solenoid valves with PWM(Pulse-width-modulation) technique and using LQ(Linear-Quadratic) optimization principle. Based on the system, the parts of system can be formulated with equations. According to equations, the mathematical model of the system was established. By simulation, the corresponding LQ optimal controller was designed and the PWM signals were generated. The comparison of the simulation and experiment results show that LQ optimal control method with PWM technique employing high speed On/Off solenoid valve can provide better system performance and a high position precision is obtained.

Keywords

high speed On/Off solenoid valves / PWM technique / LQ optimal control