Stability analysis of hydraulic system on scissor type aerial work platform

LIU Zhi, JI Ai-min, ZHANG Lei, WANG Hao, ZHAO Zhong-hang
（College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China）

Abstract: Aiming at realizing the safe operation of the scissor type aerial work vehicle under specified working conditions need to fully consider internal and external disturbances, the mechanical modeling of the six-level scissor mechanism was carried out to introduce the relationship between the thrust of the hydraulic cylinder and the lifting angle by virtue of the principle of virtual work. In addition,the hydraulic system of the six-level scissor mechanism was taken as the research object, the hydraulic library, plane mechanism library and signal library of the engineering simulation software AMESim were used to model and simulate the upper part of the scissor type aerial work vehicle. The results indicate that when working in the same lifting height, as the angle of lifting changes,the configuration of the throttle valve, accumulator, and speed regulating motor in the hydraulic pipeline can effectively improve the dynamic performance of the hydraulic system and the stability of the working platform and ensure safe and reliable for working at heights.
Key words: scissor aerial work platform; hydraulic system; AMESim simulation; motion stability