Offline fast modification of position loop gains for five-axis machining

卷:127

Article

关键词: IMPROVING CONTOURING ACCURACY;    BALLBAR DYNAMIC TESTS;    ERRORS;    IDENTIFICATION;   

DOI  :  10.1007/s00170-023-11756-9

来源: SCIE

【 摘 要 】

Servo matching (SM) controls the contour error (CE) by coordinating the tracking error (TE) of each axis, which is a basic strategy of CE control. However, the five-axis SM approach has not been widely used in engineering because of the long time to compute the modification of the position loop gain (PLG). This paper establishes the function relationship between the five-axis PLG and parts CE based on the Jacobian matrix. An offline PLG fast modification approach for parts CE in five-axis machining was proposed based on the above criteria. Using this approach, five-axis machine tools could modify the PLG of each axis for specific parts to improve contour accuracy. Compared to the traditional approach, the servo control model prediction, forward kinematics transformation (FKT), and tool contour pose search are omitted in the proposed approach. Therefore, the computational load is reduced significantly, computing time is reduced by more than 98%, and average contour accuracy is improved by more than 57%.

【 授权许可】

Free