八连杆压力机传动机构的优化设计
发布时间：2019-05-13 19:00
【摘要】：在ADAMS中建立传动机构的铰接点,连接各点建立八连杆机构的虚拟样机模型。参数化各铰接点的横纵坐标作为设计变量,比较各设计变量对工作行程内滑块速度标准差的影响,选择敏感度较大的设计变量作为优化变量。基于曲柄存在条件建立约束关系,以工作行程内滑块速度标准差的最小值作为优化目标。采用广义简约梯度法,引入松弛变量将不等式约束转化成等式约束,用非基变量表示基变量,将目标函数改写成关于非基变量的表达式,进行迭代计算得到优化结果。适当调整优化后设计变量的值,得到最终的结果。与优化前机构对比,工作行程内,最大速度由590 mm·s~(-1)降至425 mm·s~(-1),速度标准偏差由175 mm·s~(-1)降至120 mm·s~(-1)。
[Abstract]:The articulation point of the transmission mechanism is established in ADAMS, and the virtual prototype model of the eight-bar linkage mechanism is established by connecting each point. Parameter the transverse and longitudinal coordinates of each joint as the design variable, compare the influence of each design variable on the standard deviation of slider speed in the working stroke, and select the design variable with high sensitivity as the optimization variable. Based on the existence condition of crank, the constraint relation is established, and the minimum value of the standard deviation of slider speed in the working stroke is taken as the optimization objective. By using the generalized reduced gradient method, the inequality constraints are transformed into equality constraints by introducing relaxation variables, the basic variables are represented by non-basic variables, and the objective function is rewritten into the expression of non-basic variables, and the optimization results are obtained by iterative calculation. The value of the optimized design variable is adjusted properly, and the final result is obtained. Compared with the mechanism before optimization, the maximum speed decreases from 590 mm 路s ~ (- 1) to 425 mm 路s ~ (- 1), and the velocity standard deviation decreases from 175 mm 路s ~ (- 1) to 120 mm 路s ~ (- 1).
【作者单位】： 南京理工大学机械工程学院;
【基金】：江苏省重点研发计划(BE2015011-3)
【分类号】：TG315
，
本文编号：2476113
[Abstract]:The articulation point of the transmission mechanism is established in ADAMS, and the virtual prototype model of the eight-bar linkage mechanism is established by connecting each point. Parameter the transverse and longitudinal coordinates of each joint as the design variable, compare the influence of each design variable on the standard deviation of slider speed in the working stroke, and select the design variable with high sensitivity as the optimization variable. Based on the existence condition of crank, the constraint relation is established, and the minimum value of the standard deviation of slider speed in the working stroke is taken as the optimization objective. By using the generalized reduced gradient method, the inequality constraints are transformed into equality constraints by introducing relaxation variables, the basic variables are represented by non-basic variables, and the objective function is rewritten into the expression of non-basic variables, and the optimization results are obtained by iterative calculation. The value of the optimized design variable is adjusted properly, and the final result is obtained. Compared with the mechanism before optimization, the maximum speed decreases from 590 mm 路s ~ (- 1) to 425 mm 路s ~ (- 1), and the velocity standard deviation decreases from 175 mm 路s ~ (- 1) to 120 mm 路s ~ (- 1).
【作者单位】： 南京理工大学机械工程学院;
【基金】：江苏省重点研发计划(BE2015011-3)
【分类号】：TG315
，
本文编号：2476113
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