基于阻尼变化的数控机床机械谐振抑制方法研究

Research on Mechanical Resonance Suppression Method of CNC Machine Tool Based on Damping Variation

针对数控机床机械部件磨损老化、润滑状态改变等原因使系统阻尼变化、谐振频率偏移等问题,建立数学模型并进行理论分析,研究阻尼对谐振频率的影响,利用噪声测量软件在线辨识系统的谐振频率,利用菲迪亚数控系统的内置优化软件自动整定陷波滤波器参数,以达到快速有效地抑制机械谐振的目的。将该方法应用于VMC0656e数控机床机械谐振抑制,通过工程实践可证明该方法能够快速准确地获取设备机械谐振状态,自动整定陷波滤波器参数,有效地抑制了机械谐振。

In order to solve the problem that the damping changes of CNC machine tool system due to the wear,aging and lubrication state change of mechanical parts,which causes the resonant frequency drift,a mathematical model is established and the influence of damping on the resonant frequency is analyzed theoretically.The resonant frequency of the system is identified online by the software of noise measurement.Finally,FIDIA optimization software is used to automatically setting notch filter parameters to achieve fast effective suppression of mechanical resonance.Through the application of the method to mechanical resonance suppression of VMC0656e CNC machine,it proves that the method can quickly obtain equipment mechanical resonance state accurately,automatically setting notch filter parameters,and effectively suppress the mechanical resonance.