Speed Planning Algorithm Based on Improved S-Type Acceleration and Deceleration Model

The acceleration saltation of the traditional S-type acceleration model in the speed planning of the NURBS curve will result in the vibration and flexible impact of the machine tool. It will affect the surface quality of the components. The high speed smooth S-type acceleration and deceleration mode...

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Bibliographic Details
Published in:Shanghai jiao tong da xue xue bao 2021-12, Vol.26 (6), p.786-793
Main Authors: Luo, Huimiao, Zhao, Dongbiao, Fu, Wenqiang
Format: Article
Language:English
Subjects:
Acceleration
Algorithms
Architecture
Classification
Computer Science
Deceleration
Electrical Engineering
Engineering
Life Sciences
Machine tools
Machining
Materials Science
Parameter sensitivity
Saltation
Surface properties
Vibration
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Summary:The acceleration saltation of the traditional S-type acceleration model in the speed planning of the NURBS curve will result in the vibration and flexible impact of the machine tool. It will affect the surface quality of the components. The high speed smooth S-type acceleration and deceleration model deals with flexible impact, but the calculation is tedious. Aimed at the above problems, the traditional S-type acceleration and deceleration model is improved to make the jerk change linearly at a certain slope to reduce the flexible impact. Before the speed planning, it is needed to find the arc length and curvature of each point on the NURBS curve with a tiny step, and to determine the speed sensitivity point on the curve accordingly. According to the speed sensitive point, the NURBS curve is segmented. The attribute parameters of each section are determined by adaptive speed planning. Then, the speed planning can be performed on the NURBS curve according to the speed characteristics classification. The simulation results show that the algorithm can effectively reduce the flexible impact, improve the machining precision and efficiency, and simplify the classification of speed characteristics.
ISSN:1007-1172
1674-8115
1995-8188
DOI:10.1007/s12204-021-2322-4