平面四杆机构少位置设计要求特征提取方法  

Feature Extraction Method for Planar Four-bar Mechanism with Design Requirement of Finitely Separated Position

作　　者：丁健生[1] 刘文瑞[2] 孙建伟[2] Ding Jiansheng;Liu Wenrui;Sun Jianwei(School of Applied Technology, Changchun University of Technology, Changchun 130012, China;School of Mechatronic Engineering, Changchun University of Technology, Changchun 130012, China)

机构地区：[1]长春工业大学应用技术学院,吉林长春130022 [2]长春工业大学机电工程学院,吉林长春130022

出　　处：《机械传动》2018年第12期59-63,共5页Journal of Mechanical Transmission

基　　金：国家自然科学基金(51775054)

摘　　要：针对数值图谱法无法直接求解平面四杆机构少位置设计要求的轨迹综合问题,基于复函数最小二乘法,提出了一种利用傅里叶级数对少位置点近似逼近,实现少位置离散点特征提取的方法。发现了少位置点的平移、旋转、缩放后的特征参数与原始位置少位置点的特征参数之间的内在联系。结合数值图谱法,对平面四杆机构少位置设计要求轨迹综合问题进行求解。综合结果证明,所提出的方法对少位置设计要求的轨迹综合问题具有适用性和有效性。Aiming at the problem that the numerical atlas method can′t be used to synthesize the finitely separated positions design requirements for the planar four-bar mechanism,based on the complex function least square method,a method for realizing the feature extraction of finitely separated positions discrete points is proposed by using the Fourier series approximation fitting finitely separated position.The relationship of feature parameters between the finitely separated positions and their transformations,including translation,rotation,and scaling is found.Combining with numerical atlas method,the finitely separated positions design requirements path generation of the planar four-bar mechanism is realized.Examples are presented to illustrate the applicability and effectiveness of the proposed method.

关 键 词：特征提取 平面四杆 傅里叶级数 归一化 

分 类 号：TH112[机械工程—机械设计及理论]