摘要
四杆机构运动过程中输出的摆动力和摆动矩较大,导致机构产生很大的噪音,不能很好地满足工作环境的要求.对此,针对四杆机构形状问题进行了优化,实现输出的摆动力和摆动矩最小化.构造四杆机构的运动简图,对四杆机构运动进行受力分析,给出了输出摆动力和摆动矩的计算公式,引入了B样条曲线构造四杆机构的形状.B样条曲线的控制点作为设计变量,结合具体实例确定四杆机构中需要优化的目标对象,采取遗传算法搜索出最优解,对相关参数进行仿真.仿真结果显示,优化前输出的摆动力和摆动矩最大值大约分别为19N和30N·m,优化后输出的摆动力和摆动矩最大值大约分别为6N和12N·m.优化后的四杆机构输出的摆动力和摆动矩相对较小,运动比较平稳,噪音较低,效果较好.
At present,the output of four-bar mechanism shaking power and shaking torque is relatively large in the process of movement,leading institutions have a lot of noise,can not meet the requirements of the work environment.In this regard,the shape of the four-bar mechanism was optimized,minimizing the output placed shaking power and shaking torque.Structure four-bar mechanism kinematic sketch,of four bar mechanism for force analysis and gives the output shaking power and shaking torque calculation formula.The B spline curves are introduced to construct the shape of the four bar mechanism,and the control points of the B-spline curves are used as the design variables.Combined with specific examples to determine the need to optimize the target object in the four bar,the genetic algorithm to search for the optimal solution,the relevant parameters of the simulation.Simulation results show that the optimization before the output shaking power and shaking torque of maximum values were approximately 19 N and30 N·m,the optimized output shaking power and shaking torque of maximum value is around6 N and12N·m respectively.After the optimization of four bar mechanism output shaking power and shaking torque is relatively small,stable motion,low noise,the effect is better.
出处
《中国工程机械学报》
北大核心
2017年第2期125-129,135,共6页
Chinese Journal of Construction Machinery
基金
云南省自然科学基金资助项目(2012ZC030)
关键词
B样条曲线
四杆机构
摆动力
摆动矩
遗传算法
优化
仿真
B-spline curve
four bodies
shaking force
swing moment
genetic algorithms
optimization
simulation
