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Technical Brief

A Novel Synthesis Method for Nonperiodic Function Generation of an RCCC Mechanism

[+] Author and Article Information
Wenrui Liu

School of Mechatronic Engineering,
Changchun University of Technology,
No. 2055, Yanan Road,
Changchun 130012, Jilin, China
e-mail: wenruilv@126.com

Jianwei Sun

School of Mechatronic Engineering,
Changchun University of Technology,
No. 2055, Yanan Road,
Changchun 130012, Jilin, China
e-mail: avensun@tom.com

Bangcheng Zhang

School of Mechatronic Engineering,
Changchun University of Technology,
No. 2055, Yanan Road,
Changchun 130012, Jilin, China
e-mail: 459031115@qq.com

Jinkui Chu

School of Mechanical Engineering,
Dalian University of Technology,
No. 2, Linggong Road,
Ganjingzi District,
Dalian 116023, Liaoning, China
e-mail: chujk@dlut.edu.cn

1Corresponding author.

Contributed by the Mechanisms and Robotics Committee of ASME for publication in the JOURNAL OF MECHANISMS AND ROBOTICS. Manuscript received November 27, 2017; final manuscript received February 28, 2018; published online April 5, 2018. Assoc. Editor: Andrew P. Murray.

J. Mechanisms Robotics 10(3), 034502 (Apr 05, 2018) (8 pages) Paper No: JMR-17-1397; doi: 10.1115/1.4039497 History: Received November 27, 2017; Revised February 28, 2018

In this paper, the nonperiodic function synthesis of an RCCC mechanism is presented using a wavelet feature parameter (WFP) method. The output function and the sliding displacement of the RCCC mechanism are described by the wavelet approximate and wavelet details. Based on the relationship of wavelet details of the sliding displacement and its scaling, a normalization method for wavelet details of the sliding displacement is presented. The influence of proportional scaling of the linkage lengths is eliminated. An adaptive database is established. The problem of nonperiodic design requirements of RCCC mechanism function synthesis is solved. To demonstrate the feasibility of this method, two numerical examples are proposed. Based on the nonperiodic design requirements, the RCCC mechanisms are designed and simulated using matlab and catia software. The results show that the method proposed is effective for nonperiodic function generation of the RCCC mechanism with multiple positions.

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References

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Figures

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Fig. 8

The nonperiodic design requirements

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Fig. 9

Comparison between prescribed function curves and design results

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Fig. 10

Error between prescribed function curves and design results

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Fig. 7

The periodic output function and the sliding displacement curves

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Fig. 3

The output function curve of the first group mechanism

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Fig. 4

The sliding displacement curve of the first group mechanism

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Fig. 5

Comparison between prescribed function curves and design results

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Fig. 6

Error between prescribed function curves and design results

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