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A Parametrization-Invariant Fourier Approach to Planar Linkage Synthesis for Path Generation

机译:用于路径生成的平面链接综合的参数不变傅里叶方法

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摘要

This paper deals with the classic problem of the synthesis of planar linkages for path generation. Based on the Fourier theory, the task curve and the synthesized four-bar coupler curve are regarded as the same curve if their Fourier descriptors match. Using Fourier analysis, a curve must be given as a function of time, termed a parametrization. In practical applications, different parametrizations can be associated with the same task and coupler curve, respectively; however, these parametrizations are Fourier analyzed to different Fourier descriptors, thus resulting in the mismatch of the task and coupler curve. In this paper, we present a parametrization-invariant method to eliminate the influence of parametrization on the values of Fourier descriptors by unifying given parametrizations to the arc length parametrization; meanwhile, a new design space decoupling scheme is introduced to separate the shape, size, orientation, and location matching of the task and four-bar curve, which leads naturally to an efficient synthesis approach.
机译:本文讨论了用于路径生成的平面链接综合的经典问题。根据傅立叶理论,如果任务曲线和合成的四杆耦合器曲线的傅立叶描述符匹配,则将它们视为同一条曲线。使用傅立叶分析,必须根据时间给出一条曲线,称为参数化。在实际应用中,不同的参数化可以分别与相同的任务和耦合器曲线相关联。然而,这些参数化被傅立叶分析为不同的傅立叶描述子,从而导致任务和耦合器曲线不匹配。在本文中,我们提出了一种不变参数化方法,通过将给定的参数化统一到弧长参数化中来消除参数化对傅立叶描述符值的影响;同时,引入了一种新的设计空间去耦方案,以分离任务和四杆曲线的形状,大小,方向和位置匹配,这自然导致了一种有效的综合方法。

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  • 来源
    《Mathematical Problems in Engineering》 |2017年第10期|8458149.1-8458149.16|共16页
  • 作者

    Li Xiangyun; Chen Peng;

  • 作者单位

    Southwest Jiaotong Univ, Sch Mech Engn, Chengdu 610031, Sichuan, Peoples R China;

    Southwest Jiaotong Univ, Sch Mech Engn, Chengdu 610031, Sichuan, Peoples R China;

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