Installing position optimization of hydraulic cylinder of scissors lift platform
HE Xuehong, LU Wenjia, YIN Qizhen, HU Zhiyong
(School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China)
 

Abstract: 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.
Key words: scissors lift platform; Matlab; hydraulic cylinder thrust; lifting acceleration; installing position of hydraulic cylinder; multiple objective optimization