平面四杆机构运动轨迹多目标综合优化及误差仿真研究

发布时间：2018-01-02 11:42

本文关键词：平面四杆机构运动轨迹多目标综合优化及误差仿真研究　出处：《组合机床与自动化加工技术》2017年09期 　论文类型：期刊论文

【摘要】：针对平面四杆机构运动轨迹所产生的误差较大问题,引用改进差分进化算法对平面四杆机构运动轨迹误差进行优化。构造平面四杆机构运动简图,分析四杆机构变量参数。通过欧几里得距离误差函数推导出优化目标函数,采用改进差分进化算法对四杆机构约束条件进行多目标综合优化。结合具体实例,将优化后结果输入到Matlab软件进行误差仿真,并且与优化前误差仿真结果进行对比和分析。仿真结果表明:优化前,四杆机构运动轨迹所产生的横向和纵向误差峰值分别为0.25cm和0.19cm,优化后,四杆机构运动轨迹所产生的横向和纵向误差峰值分别为0.17cm和0.13cm,横向和纵向误差峰值分别降低了32.0%和31.6%。采用改进差分进化算法优化四杆机构运动轨迹,可以降低四杆机构运动轨迹产生的误差。
[Abstract]:Aiming at the large error caused by the motion trajectory of planar four-bar mechanism, the improved differential evolution algorithm is used to optimize the motion trajectory error of planar four-bar mechanism. The kinematic diagram of planar four-bar mechanism is constructed. The variable parameters of the four-bar mechanism are analyzed. The optimization objective function is derived by Euclidean distance error function and the multi-objective comprehensive optimization of the constraint condition of the four-bar mechanism is carried out by using the improved differential evolution algorithm. The optimized results are input into the Matlab software for error simulation, and compared with the error simulation results before optimization. The simulation results show that: before optimization. The transverse and longitudinal errors of the four-bar linkage are 0.25cm and 0.19cm, respectively. The transverse and longitudinal errors of the four-bar linkage are 0.17cm and 0.13cm, respectively. The peak values of transverse and longitudinal errors are reduced by 32.0% and 31.6, respectively. The improved differential evolution algorithm is used to optimize the motion trajectory of four-bar mechanism, which can reduce the error caused by the motion trajectory of four-bar mechanism.
【作者单位】：镇江高等专科学校汽车工程学院;江苏大学汽车与交通工程学院;
【基金】：国家自然科学基金项目(51275212) 江苏省高等职业院校教师国内高级访问学者计划资助项目(2015FX098)
【分类号】：TH112
【正文快照】： 镇江212013)0引言随着机器向自动化方向的发展,连杆机构在机器中的作用越来越重要[1]。由于平面连杆机构连杆曲线具有多样性,所以可以实现各种复杂运动,特别是四杆机构和六杆机构应用非常广泛。平面连杆机构具有许多优点:(1)结构简单,加工容易,安装方便;(2)摩擦小,易于润滑,适

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