剪叉升降平台液压缸的安装位置优化研究  

Installing position optimization of hydraulic cylinder of scissors lift platform

作　　者：何雪浤[1] 鲁文佳 殷其阵 胡智勇[1] HE Xue-hong LU Wen-jia YIN Qi-zhen HU Zhi-yong(School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China)

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819

出　　处：《机电工程》2016年第10期1159-1163,共5页Journal of Mechanical & Electrical Engineering

基　　金：国家科技支撑计划项目(2014BAF08B01)

摘　　要：针对五层双液压缸布置的剪叉升降平台,起升阶段剪叉机构受力和平台运动平稳性存在的问题,利用Matlab的局部优化函数fmincon,以液压缸的安装位置为优化变量,根据剪叉结构的布置要求和液压缸安装铰点的位置关系,建立了合理的优化变量约束条件,以起始位置液压缸推力和平台速度变化率达到最小为目标,确定了多目标优化函数,从而建立了五层双液压缸布置的剪叉升降平台液压缸安装位置优化方法。并将其应用于某型剪叉升降平台油缸安装铰点布置。优化结果表明,液压缸推力值减小了13.3%,危险铰点受力减小了10.5%,平台起升速度变化率减小了14.8%,达到了"减小起始位置液压缸推力以改善剪叉机构受力,同时降低起始位置平台起升速度变化率以提高平台运动平稳性"的目的。Aiming at the force of the scissors and platform motion stability of the shear fork lift platform with five layers of double hydraulic cylinders,the local optimization function was used,which called fmincon from Matlab. The installation position was regarded as the optimization variable. According to the arrangement of the shear fork structure and the position of the hinge point of the hydraulic cylinder,reasonable constraint conditions of optimization variable were set up. The minimum value of the thrust and lifting acceleration at the initial position was regarded as the target,multiple objective optimization function was determined,the optimization method of installing position with five layers of double hydraulic cylinders was established,and it was applied to a certain fork lift platform of installing position. The results indicate that hydraulic cylinder thrust value decreases by 13. 3%,the dangerous hinge point reduces by 10. 5%,the lifting acceleration reduces by 14.8%. The goal that reduces the starting position of hydraulic cylinder thrust to improve stress of shear fork structure and the speed change rate of the starting position platform is attained.

关 键 词：剪叉升降平台 MATLAB 液压缸推力 平台速度变化率 液压缸安装位置 多目标优化 

分 类 号：TH122[机械工程—机械设计及理论]