Research On Hydraulic System Of Self-propelled Aerial Working Vehicle

HTF-GK100-DB aerial vehicle belongs to the aerospace ground mobile equipment, used for satellite fairing docking, installation and other installation and maintenance of the equipment. This paper aimed at the overhead working truck using functional index requirements of the stability of arm overhead working truck work and work platform leveling accuracy. Hold on the overhead working truck operation conditions, this paper analyzes the energy saving property. In addition, due to the particularity of using occasions, puts forward higher requirements on its reliability and practicability, this thesis through to the overhead working truck hydraulic system reliability analysis, revised technical proposal, the desired design goals. The main content of thesis mainly has three aspects:(1) For aerial vehicles continued operation conditions of heat restrictions and energy requirements, proceed from the hydraulic system pump source, using the load-sensing valve-controlled technology programs. Achieve energy requirements while ensuring the hydraulic system functionality and performance of the premise, the hydraulic decency heating power and temperature rise theoretical analysis and calculation, the simulation model to analyze the correctness of the principle of the load sensing valve regulated and different traffic load on the system efficiency and verify energy savings by testing the hydraulic system;(2) To solve the problem of the vibration of the working arm's range system, the stability of the system is established by using the typical example. According to the working platform of high accuracy flat, to reduce the working platform of arm luffing process relative to the horizontal angle deviation maximum value as the optimization objective, the hinge point application of mechanical optimization theory to optimize the leveling system, improve leveling precision and stability. Finally, the validity of the theoretical analysis and measures are verified by experiments;(3) For aerial vehicle high reliability requirements, the use of aerospace common reliability analysis processes, applications FMEA, FTA and other methods to analyze the hydraulic system reliability and system improvement measures put forward to establish the reliability of the mathematical model of the hydraulic system, quantitative analysis of the system reliability, using reliability growth testing to verify the reliability of the system.