Research on Distributed Independent Electro-Hydraulic Control System Test Bench for Excavators
In order to deeply study the application of electro-hydraulic pump control servo system in engineering machinery,a dis-tributed independent electro-hydraulic control system test bench was designed.The double displacement quantitative piston pump was used to replace the quantitative gear pump.The hydraulic structure and electronic control frame were obtained with reference to the elec-tro-hydraulic servo closed pump control technology.The parameters selection of related components in hydraulic system,hardware selec-tion of measurement and control system,specific parameters selection of industrial computer and data acquisition card were completed,and Simulink Realtime real-time system was established.Finally,the test bench was tested under different target flow.When the target flow rate is 12 L/min,24 L/min and 48 L/min,the average absolute error is 0.46,0.38 and 0.96,and the root-mean-square error is 0.505,0.50 and 1.39,respectively.Under varying motor speed and constant load pressure,the test flow curve can track the target flow curve well.The test bench can collect the signals of flow,pressure and displacement,which provides experimental basis for the further study of the distributed independent electro-hydraulic control system of excavator.
electro-hydraulic servo controlclosed pump control systemdistributed independent electro-hydraulic control system test bench
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