Abstract
Feedrate scheduling plays a crucial role in computer numerical control (CNC) machining and has attracted considerable research attention. To improve machining accuracy and motion smoothness, this paper proposes a S-shape feedrate scheduling method with rounding error elimination. Eliminate rounding errors directly, rather than consider compensating for rounding errors. Firstly, based on the typical S-shaped acceleration and deceleration (ACC/DEC) algorithm, a novel time rounding scheme is designed by adopting different rounding methods for different sub-time periods. Secondly, this is the key to eliminating rounding errors, according to the principles of constant displacement and continuity of feedrate, the jerk expression is derived, and an series of feedrate scheduling methods is are designed for different S-shaped ACC/DEC situations. In addition, adapting the feedrate interpolation strategy to the proposed feedrate scheduling method. A bidirectional interpolation strategy with backtracking correction was proposed to improve reliability and continuity in feedrate scheduling. Finally, the good performance and applicability of the proposed method are verified by a series of simulations on non-uniform rational B-spline (NURBS) curves.
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Tao he: conceptulization, methdology, writingoriginal draft, software, data curation, validation, writing-review and editing. Yujun Yang: supervision, writing-review and editing.
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He, T., Yang, Y. A S-shape feedrate scheduling method with rounding error elimination. Int J Adv Manuf Technol 129, 5261–5269 (2023). https://doi.org/10.1007/s00170-023-12555-y
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DOI: https://doi.org/10.1007/s00170-023-12555-y