Avoidance of Stick‐Slip Motion by Vibration Control

This paper deals with the excitation mechanisms of friction induced vibrations and recently found methods to avoid these vibrations. It is remarkable, that mechanisms of excitation and avoidance are closely related and, infact, the presented idea and realization of vibration control is derived from theoretical investigation of excitation mechanism. The basic mechanism will be explained and two methods of vibration control will be demonstrated theoretically and by experiment. The concept of fluctuating normal forces is the basic idea behind the two methods of vibration control. In the first case the fluctuating normal forces are generated by an additional oscillator connected to the basic stick-slip oscillator. In the second case, fluctuating normal forces are generated directly by a magnetic actuator.