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A study on a generalized parametric interpolator with real-time jerk-limited acceleration

✍ Scribed by Sung-Ho Nam; Min-Yang Yang

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
365 KB
Volume
36
Category
Article
ISSN
0010-4485

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✦ Synopsis

The impossibility of exact arc length computation for 'standard' parametric curves such as Be Β΄zier/B-spline curves makes it difficult to generate a feedrate profile with desired accelerations in real-time. This paper presents a new recursive trajectory generation method that estimates an admissible path increment and determines the initiation of the final deceleration stage according to the distance left to travel estimated at every sampling time, resulting in exact feedrate trajectory generation through jerk-limited acceleration profiles for the parametric curves. The proposed approach allows the feedrate profile to be dynamically adjusted according to geometrical path constraints for the curved path. The simulation result has been also provided to illustrate the generation of smooth feedrate profile encompassing a sequence of mixed NC blocks including traditional linear and circular blocks.

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