含间隙六杆机构的运动精度可靠性分析  

Reliability Analysis of Kinematic Accuracy for Six-Bar Linkage with Clearance

作　　者：范永斌[1] 尹明德[1] 丁奇[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《机械设计与制造》2016年第8期54-57,共4页Machinery Design & Manufacture

摘　　要：以某型敞篷汽车的六杆机构为例,提出了一种运动精度可靠性的分析方法。利用闭环矢量法建立六杆机构的运动学方程,将机构中的杆长误差和运动副间隙视为随机变量,根据有效杆长理论和连续接触假设将机构中的运动副间隙转化为杆长误差,假设杆长误差服从正态分布,对六杆机构进行运动精度分析并建立运动精度可靠性模型。使用MATLAB软件对实例进行编程计算,定量地分析了六杆机构杆长误差和运动副间隙对运动精度可靠性的影响程度。通过对六杆机构的运动精度分析,为提高机构工作的稳定性和可靠性提供了依据。A modeling method of kinematic accuracy reliability is proposed based on the six-bar linkage mechanism for a convertible.The kinematic model of the mechanism is built based on the vector loop equations of planer linkage mechanism The original length size error and the hinge joint-clearance are considered as randomvariables.According tothe effective lengthmodel theory and continuous contactassumption,the hinge joint-clearance is converted to the corresponding length sizeerror. In the assumption that the influence factors are normal distributed,the kinematic accuracy of the linkage mechanism is analyzed and reliability model is established. Using the MATLAB software to program and calculate,the quantitative analysis of theoriginal length size error and the hinge joint-clearance show the influence on output kinematic accuracyreliability of the six-bar linkage. The present methodcan provide some reference value to improvestability and reliability.

关 键 词：六杆机构 间隙运动 精度 可靠性 

分 类 号：TH16[机械工程—机械制造及自动化]