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Huien Gao, Liang Chu, Jianhua Guo, Dianbo Zhang. Temperature Compensation Algorithm for Hydraulic System Pressure Control[J]. JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2018, 27(4): 556-563. doi: 10.15918/j.jbit1004-0579.17198
Citation: Huien Gao, Liang Chu, Jianhua Guo, Dianbo Zhang. Temperature Compensation Algorithm for Hydraulic System Pressure Control[J].JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2018, 27(4): 556-563.doi:10.15918/j.jbit1004-0579.17198
shu

Temperature Compensation Algorithm for Hydraulic System Pressure Control

doi:10.15918/j.jbit1004-0579.17198
  • 1.

    State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China

  • 2.

    Jilin Provincial Institute of Standards, Changchun 130022, China

  • Received Date:2017-12-27
    Abstract
  • In this paper the control mechanism of solenoid valve is analyzed, which shows the solenoid valve control is actually the control of coil current. The response characteristic of coil current is related to coil inductance and resistance. The coil resistance is influenced greatly by the ambient temperature and the self-heating of coil, which affects the control precision of coil current. First, considering the heat dissipation mode of coil, the coil temperature model is established from the perspective of heat conduction, and a temperature compensation algorithm for hydraulic system pressure control is put forward. Then the hardware-in-the-loop testbed is set up by using the dSPACE platform, carrying out wheel cylinder pressurization tests with inlet valve fully opened at -40℃ and 20℃, and testing the actual pressure of wheel cylinder with the target pressures at -40℃ and 6.000 kPa/s (pressurization rate). The results show that the pressure control temperature compensation algorithm proposed in this paper accurately corrects the influence of resistance temperature drift on the response accuracy of wheel cylinder pressure. After the correction, the pressure difference is less than 500 kPa, which can meet the control accuracy requirements of solenoid valve, enriching the linear control characteristic of solenoid valve.
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