关键词: 车辆工程, 悬挂试验台, 液压加载, 仿真分析

Abstract: In order to increase the automation level and test accuracy of the tractor hydraulic hitch system, a test-bench structure of the program was proposed, which used the electro-hydraulic proportional valve for controlling the loading force and verticality during the test. Based on SimulationX software, the hydraulic loading system of the test bench was simulated and analyzed. The results indicate that the adjustment time of target loading force is all less than 0.3 s; the maximum error of the loading force test is about 0.6 kN; and the actual curve and the following curve are basically agreed in the rising phase of loading force. In the simulation process of verticality, the time of the system to reach a steady state at a low initial deviation, intermediate and high initial deviation is within 0.3 and 2.0 s respectively, which verifies the feasibility of the design and provides an efficient test platform for the product development and quality testing of the tractor hydraulic hitch system.

Key words: vehicle engineering, hitch test bench, hydraulic loading, simulation analysis