In the paper the author describes and explains the concept, characteristics of the self diagnosis and rapidly repairing control which are applied in the controlling process of friction driving system to simplify the maintenance such as replacing and updating equipment and its parts while the whole system runs reliably.

According to the shock characteristics between composite ultrasonic linear vibrator and guide slide surface,this paper proposed an impulse analysis model for calculating the friction drive force and friction transfer efficiency of ultrasonic motor.

Work principle of the booster multi-drive and the tension change law of the load belt are analysed;According to the characteristic of this technology,its applicability is introduced,then its use effect is proved by the example.

By contrasting four reconstructive projects and considering the locale condition of the conveyor,the booster multi-drive is adopted for the way to increase the capacity of the power belt.

This article discusses about how to fix the position of rolling stock wheelsets onto the underfloor wheel lathe and analyses the positioning principles and characteristics of the friction driving rollers based on the underfloor wheel lathe manufactured by SCULFORT.