High-precision parameter path interpolation method and system

A high-precision, parametric technology, used in general control systems, control/regulation systems, instruments, etc., can solve the problem that the interpolation parameter path cannot suppress acceleration fluctuations, etc., to improve motion stability and reduce output trajectory acceleration fluctuations. Effect
CN114265367APending Publication Date: 2022-04-01HANGZHOU DIANZI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HANGZHOU DIANZI UNIV
Publication Date
2022-04-01

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Abstract

The invention relates to a high-precision parameter path interpolation method and system, and the method comprises the steps: S1, segmenting a parameter curve path based on the curvature monotonicity of the parameter curve path according to a critical curvature value point and a curvature extreme point, and solving the arc length of each segment; s2, respectively planning the speed of each segment by adopting a jump-bounded S curve acceleration and deceleration algorithm; s3, based on the arc length of each segment and the speed of each segment, performing cubic spline fitting to obtain an arc length-to-time spline and a parameter-to-arc length spline; s4, in the interpolation process, the arc length corresponding to the actual feeding step is obtained through the arc length pair time spline, corresponding parameters are obtained through the parameter pair arc length spline, and therefore the coordinate increment of interpolation is calculated. According to the method, the output feeding acceleration fluctuation can be remarkably suppressed, and the interpolation precision is improved.
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Description

technical field

[0001] The invention belongs to the technical field of feed path control of numerical control and electromechanical integration systems, and in particular relates to a high-precision parameter path interpolation method and system, in particular, the method of parameter mapping for speed planning of feed components can be used to interpolate the parameter path to reduce the Interpolate the acceleration fluctuation of the output trajectory of the high-speed feed component to improve its motion stability. Background technique

[0002] Traditional CNC machine tools generally use linear and exponential methods to describe the relationship between feed speed and time. The calculation is simple, but there is a sudden change in acceleration at the beginning and end of acceleration and deceleration, so the driver has an impact on the driven part at the beginning and end of acceleration and deceleration. Force, so it is not suitable for high-speed machining.

[0003] ...

Claims

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