Reducing the undesirable effects of the planar conjugate cam linkage mechanism with multiple clearances

IF 1.8 4区工程技术 Q3 ENGINEERING, MECHANICAL

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science Pub Date : 2024-07-25 DOI:10.1177/09544062241259612

Congpeng Chen, Jiangmin Mao, Yingdan Zhu, Guanjun Bao

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Abstract

The dynamic behavior of the mechanism is subject to the influence of the clearance in the joints. Existing methods for improving the mechanism’s performance usually focus on one type of clearance joint, ignoring the interaction among multiple different types of clearance joints. To address this gap, an optimization method is proposed to lower adverse impact forces and vibrations in planar conjugate cam linkage mechanisms with cam and revolute clearance joints. The contact force model of the clearance joint is formulated using the Flores contact force model and the modified Coulomb friction model. Based on these models and Lagrange’s equation of the first kind, the dynamic equations of the mechanism describe its behavior during operation. The optimization method is aimed at minimizing the peak of the mechanism’s maximum absolute acceleration by employing the whale optimization algorithm (WOA) to optimize the length of the linkages and the initial angles between them. Additionally, the slider stroke serves as a constraint function. Finally, the effectiveness of the approach is validated using an example of a planar conjugate cam linkage mechanism. Simulation results show a reduction of 65.8% in acceleration peaks and 64.2% in the clearance revolute joint maximum contact force.

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减少多间隙平面共轭凸轮连杆机构的不良影响

机构的动态行为受到接头间隙的影响。改善机构性能的现有方法通常只关注一种类型的间隙接头，而忽略了多种不同类型间隙接头之间的相互作用。针对这一缺陷，我们提出了一种优化方法，以降低带有凸轮和外卷间隙接头的平面共轭凸轮连杆机构的不利冲击力和振动。采用 Flores 接触力模型和修正的库仑摩擦模型建立了间隙接头的接触力模型。基于这些模型和拉格朗日第一类方程，机构的动态方程描述了其在运行过程中的行为。优化方法旨在通过采用鲸鱼优化算法（WOA）来优化连杆的长度和它们之间的初始角度，从而最大限度地降低机构的最大绝对加速度峰值。此外，滑块行程也是一个约束函数。最后，以平面共轭凸轮连杆机构为例，验证了该方法的有效性。仿真结果表明，加速度峰值降低了 65.8%，间隙旋转接头最大接触力降低了 64.2%。

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来源期刊

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 工程技术-工程：机械

CiteScore

3.80

自引率

10.00%

发文量

625

审稿时长

4.3 months

期刊介绍： The Journal of Mechanical Engineering Science advances the understanding of both the fundamentals of engineering science and its application to the solution of challenges and problems in engineering.