以可控平面5R并联机构为研究对象,结合其工程应用背景,建立了运动学模型,提出了构型变换与运动特性分析一体化全信息参数建模方法。基于自下而上的构型设计方法,建立杆副、运动支链、主构型模型及配置模型。通过变驱动布局、变参数配置方式变换出新构型,达到构型快速重构设计、简化运动学求解的目的。对驱动布局构型变换前后的输出运动轨迹跟踪对比分析,表明扩大了工作空间。设计实验装置,验证了轨迹跟踪法求解工作空间的有效性。
Abstract Taking the controllable 5R planar parallel mechanisms( PPM) as the study object,combining its engineering application,the kinematic model is established,and the full-information parameter modeling method of configuration transformation and movement characteristic analysis integration is proposed.Based on the bottom-up configuration design method,the model of bar-pair,kinematic sub-chain,main configuration are established. Through the variable drive layout,parameters configuration mode,the new configuration is transformed,the purpose of rapid reconstruction design of configuration and the simplified kinematics solution is achieved. The contrastive analysis of the output trajectory tracking before and after the drive layout configuration transformation is carried out,the result shows that the workspace is expanded. Through designing the experiment device,the effectiveness of solving the workspace by trajectory tracking method is verified.