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Reliability-based optimization design of the latch needle mechanism in double-needle warp knitting machine

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Journal of the Brazilian Society of Mechanical Sciences and Engineering Aims and scope Submit manuscript

Abstract

Based on the matrix method and clearance vector model, a simple, accurate, efficient and general mechanical reliability analysis method is presented to analyze the reliability of a complex linkage mechanism with structural errors and clearances. The output error variances of the latch needle mechanism in double-needle warp knitting machine are obtained based on this matrix method and verified by Monte-Carlo method. Then, an optimization design method for the latch needle mechanism is presented with the use of genetic algorithm, considering the motion requirement and output errors. The optimized latch needle mechanism can meet the double-dwell motion requirement, and has higher displacement accuracy and reliability under the same structural errors and clearance conditions. This method has practical engineering value in solving the contradiction between high precision loop-forming motion and multi-link accumulative errors, reducing cost, and providing a reference for the optimization design for loop forming mechanism in a warp knitting machine.

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Acknowledgements

This project is supported by National Natural Science Foundation of China (51375084), Research Fund for the Doctoral Program of Higher Education of China (20130075110002) and the Fundamental Research Funds for the Central Universities (CUSF-DH-D-2017061).

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Authors and Affiliations

  1. College of Mechanical Engineering, Donghua University, Shanghai, 201620, China

    Liuyuan Su, Zhuo Meng & Yize Sun

  2. Yili Technology Co. Ltd, Huafeng Group, Putian, 351146, Fujian, China

    Xiaoyi Ge

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  1. Liuyuan Su
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  2. Zhuo Meng
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  3. Yize Sun
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  4. Xiaoyi Ge
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Corresponding author

Correspondence to Zhuo Meng.

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Technical Editor: Marcelo A. Trindade.

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Su, L., Meng, Z., Sun, Y. et al. Reliability-based optimization design of the latch needle mechanism in double-needle warp knitting machine. J Braz. Soc. Mech. Sci. Eng. 40, 205 (2018). https://doi.org/10.1007/s40430-018-1134-4

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  • DOI: https://doi.org/10.1007/s40430-018-1134-4

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