Optimization Design For Luffing Mechanism Of Aerial Work Platform

The luffing mechanism is used in aerial work platform, not only the form is new but also it can increase the working range, improve working conditions and reduce the maximum force and hydraulic shock of the luffing oil cylinder. Therefore, the optimization analysis on luffing mechanism has important significance.With the background of26m Aerial work platform project of Dalian University of Technology and a company’s R&D cooperation, the point location of aerial work platform linkage luffing mechanism is analyzed in this paper, which is combined with the virtual prototype technology and based on the genetic algorithm toolbox of MATLAB. The main work is as follows,(1) The working principle of luffing mechanism for work platforms is analyzed, locations of luffing mechanism hinge points are preliminary selected, the mathematical model of the luffing mechanism is set up and the calculation program of mathematical model is programmed. According to the any-homework condition of work platforms, mechanical characteristics of luffing oil cylinder and luffing mechanism hinge points of are analyzed, then the worst working condition of luffing oil cylinder is finded according to the max force of luffing oil cylinder.(2) Locations of connecting rod luffing mechanism hinge points are taken as design variables, reducing the max force of luffing oil cylinder is taken as the objective function. Combined with MATLAB genetic algorithm toolbox technology and genetic algorithm, the characteristics of the global optimum solution is easy to be acquired, the optimization analysis of mathematical model is made under the worst working condition of luffing oil cylinder.(3) Based on the3D modeling capabilities of Pro/E and the dynamic simulation technology of ADAMS, the virtual prototype model of the luffing mechanism is established. Then make an comparative analysis between the dynamic simulation results of the virtual prototype model and the numerical results of the mathematical model, to verify the rationality of the primaries hinge point position and the correctness of the mathematical model.