Multi-degree-of-freedom forming robot non-uniform error calibration method
By employing a non-uniform error calibration method for multi-degree-of-freedom forming robots, and utilizing a line laser measuring instrument and least squares fitting, the problems of high complexity and low accuracy in error calibration of multi-degree-of-freedom parallel mechanisms are solved, achieving efficient and low-cost sub-micron level accuracy calibration.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- WUHAN UNIV OF TECH
- Filing Date
- 2026-04-13
- Publication Date
- 2026-06-02
AI Technical Summary
Existing technologies struggle to effectively identify and compensate for end effector pose deviations caused by multiple sources of interference, such as manufacturing, assembly, and thermal deformation, in multi-degree-of-freedom parallel mechanisms. This results in high calibration complexity, low accuracy, and high cost, making it difficult to meet sub-micron level accuracy requirements.
A non-uniform error calibration method for multi-degree-of-freedom forming robots is adopted. By establishing a kinematic model, constructing a line laser measuring instrument measurement model and an error model, and using the least squares method to fit the measurement data, the complexity of the measurement system is reduced, and the calibration efficiency and accuracy are improved.
It has achieved a calibration efficiency improvement of over 77%, a significant reduction in equipment costs, and an improvement in calibration accuracy and reliability, meeting the requirements for high-precision multi-degree-of-freedom collaborative control.
Smart Images
Figure CN122125710A_ABST