magneto-rheological damper

WANG Kai1，HE Li-dong1，XING Jian1，LIU Ming2

（1. Engineering Research Center of Chemical Technology Safety Ministry of Education，

Beijing University of Chemical Technology，Beijing 100029，China；

2. Petrochina Planning and Engineering Institute，Beijing 100083，China）

Abstract：Aiming at solving the problem that rotating machinery vibration is too large around the critical speed，a single-span rotor system bench was established to simulate the starting process. Without changing original supports of the rotors system，one self-designed magneto- rheological damper was installed at each shaft. Different working conditions were set to study the influences at different operating current of dampers. According to test results，a PID control strategy was proposed and a vibration active control system was

designed. Based on amplitude，vibration of a single-span rotor was controlled with the current which adjusted with different vibration and sent to dampers. The results indicate that the damper can reduce the vibration of the shaft near the critical speed vibrations，and the control method can adjust the vibration in real time，and keep the vibration around the target value，without stopping the machine.

Key words：magneto-rheological dampers；vibration damping；rotor；amplitude feedback；PID