摘要
提出了一种超声波微驱动摩擦改性的思想。通过激励超声波马达振子的两个对称的夹心式换能器前端头作旋转方向相反的椭圆运动,使摩擦副处于超声波动力润滑状态,同时控制两个夹心式换能器振幅,实现在低速运动时对摩擦力的主动控制达到减小摩擦力的目的。利用气浮导轨、力传感器、低速电机建立了摩擦力模糊控制系统。初步的实验表明,摩擦力大大减小,当振子和负载总质量为3．8kg,电机拖动速度0．5mm/s时,摩擦系数达到0．0053。
A method to change frictional characteristics proposed based on ultrasonic micro driving technique. Exciting clockwise and anticlockwise microscopic elliptical motion of driving points on the ultrasonic transducer＇s two longitudinal bolt-clamped vibrators will change the nature of friction and generate ultrasonic lubricant; furthermore, the friction can be active controlled by adjusting the vibrators＇ vibrating amplitude. An experimental installation for friction control is designed using aerostatic guide, force sensor, low speed motor. Fuzzy control theory is used in this system, the experiment results indicate the friction has been lessened largely, the friction coefficient reaches 0.0053 when the total mass of ultrasonic transducer and load is 3.8 kg and the motor＇s driving speed is 0.5 mm/s.
出处
《声学学报》
EI
CSCD
北大核心
2006年第5期444-448,共5页
Acta Acustica
基金
国家自然科学基金(50175018)
黑龙江省自然科学基金
