High-precision linear interpolation control method, device and terminal equipment of motion control unit
By using endpoint diamond frame determination and adaptive control of the main and secondary axes, the problem of low accuracy in linear interpolation schemes was solved, achieving high-precision interpolation, improving the trajectory and machining accuracy of motion control, and optimizing the efficiency and stability of interpolation calculations.
Patent Information
- Application Number
- CN202610640583.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-17
AI Technical Summary
The existing linear interpolation scheme has the problem of low machining accuracy, especially in high-precision motion control scenarios, the maximum contour error is as high as 0.707 pulse equivalents, which cannot meet the precision machining requirements of high-end equipment.
Endpoint deviation compensation is achieved by using discrete reference points at the endpoint and diamond frame determination. Combined with adaptive determination of the main and secondary axes, precise control by deviation recursion formula, and collaborative logic of fixed-step feed of the main axis and adaptive adjustment of the secondary axis with deviation, the maximum contour error of linear interpolation is controlled within 0.5 pulse equivalents.
It improves interpolation accuracy by about 30%, significantly enhancing the trajectory accuracy and machining accuracy of motion control. Furthermore, through hardware parallel execution and pipeline optimization, it avoids software computation delays and scheduling interference, ensuring constant interpolation delay and low timing jitter, thereby improving interpolation computation efficiency and motion stability.
Smart Images
Figure CN122411287A_ABST