【摘要】：現(xiàn)有進(jìn)給速度規(guī)劃算法難以方便有效地實(shí)現(xiàn)高階柔性進(jìn)給運(yùn)動(dòng),不利于提高高速進(jìn)給定位精度和抑制其振動(dòng),為此提出加速度二階導(dǎo)數(shù)即顛簸度分段線性連續(xù)的高速進(jìn)給控制算法。按速度規(guī)劃參量將其劃分為有、無(wú)恒加速兩種類(lèi)型,并結(jié)合運(yùn)動(dòng)行程分別給出了每類(lèi)進(jìn)給運(yùn)動(dòng)的實(shí)現(xiàn)方式;分析了一條非均勻有理B樣條曲線的曲率,并根據(jù)其局部極大值分割該曲線,確定了各曲率極值點(diǎn)的可行進(jìn)給速度,由各子段曲線內(nèi)的位移協(xié)調(diào)關(guān)系,分別利用所提算法及S曲線規(guī)劃了該曲線的進(jìn)給速度并進(jìn)行比較。結(jié)果表明,所提算法可為高速加工參數(shù)輪廓規(guī)劃高階柔性的進(jìn)給速度,并有效提高插補(bǔ)弦高精度。
[Abstract]:It is difficult to realize the high-order flexible feed motion conveniently and effectively by the existing feed speed planning algorithms, which is not conducive to improving the positioning accuracy of the high-speed feed and suppressing its vibration. For this reason, a high speed feed control algorithm with second derivative of acceleration, I. e., the piecewise linear continuity of the degree of turbulence, is proposed. According to the velocity planning parameters, it is divided into two types, there is no constant acceleration, and the realization mode of each kind of feed motion is given according to the motion stroke, and the curvature of a nonuniform rational B-spline curve is analyzed. According to the local maximum of the curve, the feasible feed velocity of each curvature extreme point is determined, and the displacement coordination relation in each sub-section curve is obtained. The feed velocity of the curve is programmed and compared by using the proposed algorithm and S curve respectively. The results show that the proposed algorithm can be used for high order flexible feed speed planning for high speed machining parameters, and can effectively improve the precision of interpolation string.
【作者單位】： 杭州電子科技大學(xué)機(jī)械工程學(xué)院;杭州電子科技大學(xué)自動(dòng)化學(xué)院;浙江大學(xué)制造工程及自動(dòng)化研究所;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51405119) 浙江省自然科學(xué)基金資助項(xiàng)目(LY12E05001)~~
【分類(lèi)號(hào)】：TG659;TP13

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