RSSR机构的ADAMS参数化建模及优化技术研究

Research on ADAMS parametric modeling and optimization technique of RSSR mechanism

为对空间RSSR四杆机构进行优化设计,以RSSR机构为研究对象,运用解析法对RSSR机构进行了运动学分析,得出RSSR机构的运动解析式,确定曲柄存在条件的表达式;利用ADAMS软件参数化编程技术,将空间四杆机构关键点参数化,构建三维参数化模型;运用ADAMS软件的二次开发技术,开发了空间RSSR四杆机构的参数化建模及分析优化系统,实现了RSSR机构运动类型的判定、快速建模、机构仿真、运动分析及优化,并进行了实例分析。结果表明,对于给定的RSSR机构,系统运动分析优化后,摇杆的角速度、角加速度的最大值和最小值的绝对值明显减小,摇杆摆动速度趋于平稳。研究结果对提高RSSR机构的设计效率、减少设计周期具有参考价值。

In order to study the optimal design of spatial RSSR four-bar mechanism,taking RSSR mechanism as the research object,the kinematics analysis is carried out by using analytical method to obtain the kinematics analysis formula of RSSR mechanism,and the expression of crank existence condition is determined; by using parametric programming technology of ADAMS software,the key points of spatial four-bar mechanism are parameterized and the three-dimensional parameterized model is constructed; by using the secondary development technology of ADAMS software,the parametric modeling and analysis optimization system of spatial RSSR four-bar mechanism are developed,which realizes the determination of motion type,rapid modeling,mechanism simulation,motion analysis and optimization for the RSSR mechanism.Finally,an example is analyzed.The results show that for a given RSSR mechanism,and after optimization of system kinematic analysis,the absolute values of the maximum and minimum of the angular velocity and acceleration of the rocker are obviously reduce,and the swing speed of the rocker tends to be stable.The research result may provide reference for improving machine design efficiency and shortening design cycle.