High-precision arc interpolation control method, device and terminal equipment of motion control unit
By using an 8-quadrant subdivision judgment and a rotation direction to determine the deviation recursive formula, combined with the endpoint diamond frame judgment and radius compensation strategy, the low accuracy problem of the circular interpolation scheme is solved, and high-precision circular interpolation is achieved, meeting the precision machining needs of high-end equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CENT SOUTH UNIV
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing circular interpolation schemes suffer from low machining accuracy in high-precision motion control scenarios, with maximum contour errors exceeding 0.5 pulse equivalents and significant trajectory deviations, failing to meet the precision machining requirements of high-end equipment.
An 8-quadrant subdivision judgment and rotation direction determination deviation recursive formula are adopted. Combined with the endpoint diamond frame judgment and radius compensation strategy, the two-dimensional plane coordinate system is divided by obtaining the starting point, ending point, center coordinates and rotation direction of the arc. The deviation value and feed amount of the interpolation point are calculated to generate high-precision interpolation point coordinates, and radius compensation is performed at the endpoint.
It achieves smooth and high-precision approximation of circular arc trajectories, suppresses trajectory radius deviation and end point offset, and controls the contour error and end radius error within 0.5 pulse equivalents, thereby improving the trajectory accuracy and machining accuracy of circular arc motion control.
Smart Images
Figure CN122411284A_ABST