ultrasonic vibration system 基本例句 超声振动系统 The experiments show that the robustness and the control accuracy of the power ultrasonic system can be improved by using the self-modifying PID fazzy control technique.实验表明采用该模糊控制技术提高了系统的鲁棒性和控制精度，为超声振动系统振幅的控制提供了新的思路。