Structure optimization design and analysis of the 3-RPS driving mechanism for large antennas
Replacing the azimuth-pitch serial mechanism with a parallel mechanism as the driving mechanism for the reflec-tor antenna can satisfy its pose adjustment requirements and achieve lightweight design of the overall structure.At present,there are few research and engineering practice of applying parallel mechanism to large antennas.Therefore,it is necessary to conduct mechanical analysis and structure optimization of the parallel mechanism that bears large loads to satisfy the require-ments of load-bearing and motion accuracy.Optimization design and finite element analysis are carried out for the structural scheme of the branch chain of the 3-RPS parallel mechanism under large loads.Firstly,static analysis is conducted on the 3-RPS parallel mechanism to obtain the force characteristics of each branch chain of the mechanism under a certain load on the moving platform.Secondly,given the basic size parameters and activity range requirements of the mechanism,the struc-tural scheme of the 3-RPS parallel mechanism branch chain is designed.A parallel hydrocylinder scheme is proposed to ad-dress the severe bending of the branch chain of the parallel mechanism.Finally,the structural scheme of the parallel hydro-cylinder is optimized,and its stability is analyzed.The results show that the optimized parallel hydrocylinder scheme has bet-ter performance than the original scheme and satisfies the stability and safety requirements.This study has provided reference for practical engineering application.
3-RPS parallel mechanismmultistage hydrocylinderfinite element analysisoptimization design
NETL
NSTL
万方数据
