Research on Milling Force Compensation Based on Inverse Filtering
Milling force is an important parameter in machining processes that affects the aerospace part quality and tool life.Aiming at the distortion problem of dynamometer in the high frequency,this paper compensates the measured milling force based on the inverse filtering.First,the milling force measurement error is analyzed with respect to the structure and dynamic characteristics of the dynamometer system.Next,the principle of inverse filtering and its application to milling force compensation is presented.In addition,6061 aluminum alloy,which is widely used in aerospace and other fields,is selected for milling experiments.The inverse filter is used to compensate the milling force,and the characteristics of the compensated milling force are analyzed.Finally,shaker experiments and high-frequency calibration experiments of the displacement signal are used to verify the necessity and accuracy of milling force compensation.The experimental results show that the EVE of the input force and the compensated force is less than 6%,and the error of the identified milling force and the compensated milling force is 5.49%.The proposed milling force compensation method can accurately compensate the milling force during the machining process of the parts in aerospace and other fields.
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