基于超磁致致动器的车削振动主动控制

Turning Vibration Active Controlling System Based on GMA 

摘要:

设计了一种基于模糊PID控制器和超磁致伸缩致动器的车削振动主动控制系统,推导了超磁致伸缩致动器和专用刀架的数学模型,并在Matlab环境下进行建模仿真,当振动频率在50~100 Hz时,仿真结果表明该控制系统能抑制振幅达50%以上；在现场车削试验中,以普通45#钢为车削工件,分别在转速1 500 r/min、车削深度为0.07 mm和转速3 000 r/min,车削深度为0.04 mm下,对车削振动进行主动控制,结果证明所设计的车削振动控制系统能够抑制振动幅度达30%以上。

Abstract:

A turning vibration active control system with fuzzy PID controller and giant magnetostrictive actuator(GMA) was designed. The mathematic models about the GMA actuator and special tool post were derived. The simulation was performed on Matlab, and results show that the controlling system can reduce the vibration amplitude by more than 50% when the vibration frequency ranges from 50Hz to 100Hz. Testing was implemented on a general turning machine, in which the workpiece was 45# steel. The turning vibration was effectively controlled when the rotation speed is 1 500r/min or 3 000r/min and the cutting depth is 0.07mm or 0.04mm respectively. Testing results verifies that the designed turning vibration controlling system can effectively suppress the amplitude of the vibration by more than 30%.