發(fā)布時(shí)間：2019-05-13 19:00

【摘要】：在ADAMS中建立傳動(dòng)機(jī)構(gòu)的鉸接點(diǎn),連接各點(diǎn)建立八連桿機(jī)構(gòu)的虛擬樣機(jī)模型。參數(shù)化各鉸接點(diǎn)的橫縱坐標(biāo)作為設(shè)計(jì)變量,比較各設(shè)計(jì)變量對(duì)工作行程內(nèi)滑塊速度標(biāo)準(zhǔn)差的影響,選擇敏感度較大的設(shè)計(jì)變量作為優(yōu)化變量。基于曲柄存在條件建立約束關(guān)系,以工作行程內(nèi)滑塊速度標(biāo)準(zhǔn)差的最小值作為優(yōu)化目標(biāo)。采用廣義簡(jiǎn)約梯度法,引入松弛變量將不等式約束轉(zhuǎn)化成等式約束,用非基變量表示基變量,將目標(biāo)函數(shù)改寫成關(guān)于非基變量的表達(dá)式,進(jìn)行迭代計(jì)算得到優(yōu)化結(jié)果。適當(dāng)調(diào)整優(yōu)化后設(shè)計(jì)變量的值,得到最終的結(jié)果。與優(yōu)化前機(jī)構(gòu)對(duì)比,工作行程內(nèi),最大速度由590 mm·s~(-1)降至425 mm·s~(-1),速度標(biāo)準(zhǔn)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).
【作者單位】： 南京理工大學(xué)機(jī)械工程學(xué)院;
【基金】：江蘇省重點(diǎn)研發(fā)計(jì)劃(BE2015011-3)
【分類號(hào)】：TG315
，

本文編號(hào)：2476113