Analysis of Working Characteristics of Hydraulic Cylinder of Vehicle Steering System Based on AMESim
The hydraulic cylinder of the steering system is the most important action execution unit of the full hydraulic steering vehicle,which has an important impact on the action execution of the system.The structure and working principle of the steering hydraulic cylinder of a vehicle were analyzed,the load and key parameters were analyzed,and the mathematical model was ob-tained.The static and dynamic working characteristics of steering hydraulic cylinder were analyzed,and the mathematical mod-el was obtained.According to the mathematical model,the working characteristic analysis model of steering hydraulic cylinder was built based on AMESim.The slope input and step input of the system were selected to analyze the response of the system.The influence of equivalent mass on system response was analyzed.Based on the full hydraulic steering system test-bed,the step input response characteristics of the steering hydraulic cylinder were analyzed,the output characteristics were obtained,and the accu-racy of the mathematical model and simulation model were verified.The results show that:after the ramp signal and step signal are input,they can tend to a stable state after rapid adjustment.When the steering load mass increases gradually,the overshoot increases and the adjustment time becomes longer.It is necessary to minimize the load of the steering hydraulic cylinder to im-prove the system response.The pressure and flow change trend of the test results are consistent with the simulation analysis.The stable pressure is76.7barand the simulation analysis is 79.4bar,and the error is within 3.5％.It shows the accuracy of the analy-sis model and results,and provides a reference for such design research.
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