Research on the Control of Fuel Regulator Overshoot Based on Linear Ultrasonic Motor

Abstract

Abstract. The fuel regulator based on the linear ultrasonic motor can effectively control the fuel flow. However, the slip of the actuator in the braking phase will cause the overshoot, so that the fuel regulator can not control the fuel flow accurately. In order to reduce the overshoot, this paper presents the result control method based on the successive approximation and the process control method based on the speed regulation by analyzing the representative form of the overshoot of the regulator and the main cause of the overshoot. The control program is designed and programmed. The experimental results show that the two control methods can greatly reduce the overshoot of the fuel regulator, but the adjustment time has increased. Over comprehensive measure of overshoot and adjustment time, the result control based on successive approximation is better than process control based on speed regulation. The overshoot of the fuel regulator based on linear ultrasonic motor is reduced about 70% compared to that of traditional fuel regulator when the result control based on successive approximation is adopted, which greatly improves the fuel flow control accuracy.