An interpolation method based on adaptive smooth feedrate scheduling and parameter increment compensation for NURBS
1School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China.
ISA Transactions
|December 26, 2021
Summary
This study introduces an improved non-uniform rational B-splines (NURBS) interpolation method for smoother, high-quality free-form modeling. The adaptive smoothing and parameter compensation enhance feed motion stability and accuracy.
Area of Science:
- Computer-Aided Design (CAD)
- Geometric Modeling
- Manufacturing Engineering
Background:
- Non-uniform rational B-splines (NURBS) offer superior efficiency and quality for free-form curve and surface modeling compared to traditional methods.
- Achieving stable and efficient interpolation feed motion remains a challenge in complex modeling tasks.
Purpose of the Study:
- To develop an advanced NURBS interpolation method that enhances feed motion efficiency and stability.
- To address issues of feedrate overrun and velocity errors in interpolation point parameter calculation.
Main Methods:
- Implemented adaptive feedrate control based on curvature constraints for NURBS curve segmentation.
- Utilized improved S-shape acceleration/deceleration control to manage jerk and prevent feedrate overrun.
- Developed a parameter increment compensation method to reduce velocity fluctuations and improve interpolation parameter calculation accuracy.
Main Results:
- The proposed method effectively segments NURBS curves and optimizes feedrate based on curvature.
- Adjusted jerk using S-shape control successfully prevented feeding speed overrun.
- Parameter increment compensation significantly reduced velocity fluctuations and improved calculation accuracy.
Conclusions:
- The novel NURBS interpolation method demonstrates effectiveness in achieving high-efficiency and stable feed motion.
- Simulation and experimental results validate the algorithm's performance for free-form modeling applications.
Keywords:
Acceleration/deceleration controlCurve interpolationFeedrate schedulingIncrement compensationMore Related Videos
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