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Accurate Pressure Control Strategy of Electronic Stability Program Based on the Building Characteristics of High-Speed Switching Valve
Technical Paper
2019-01-1107
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The Electronic Stability Program (ESP), as a key actuator of traditional automobile braking system, plays an important role in the development of intelligent vehicles by accurately controlling the pressure of wheels. However, the ESP is a highly nonlinear controlled object due to the changing of the working temperature, humidity, and hydraulic load. In this paper, an accurate pressure control strategy of single wheel during active braking of ESP is proposed, which doesn’t rely on the specific parameters of the hydraulic system and ESP. First, the structure and working principle of ESP have been introduced. Then, we discuss the possibility of Pulse Width Modulation (PWM) control based on the mathematical model of the high-speed switching valve. Subsequently, the pressure building characteristics of the inlet and outlet valves are analyzed by the hardware in the Loop (HiL) experimental platform. After that, the single closed loop pressure control strategy for the inlet valve and the cascade control strategy for the outlet valve are designed. Finally, the parameters of the control strategy are set and verified through the HiL test bench. The experimental results show that the designed control strategy could ensure that the actual pressure is accurately stabilized near the target pressure under different working conditions.
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Chen, Z., Wu, J., and Zhu, B., "Accurate Pressure Control Strategy of Electronic Stability Program Based on the Building Characteristics of High-Speed Switching Valve," SAE Technical Paper 2019-01-1107, 2019, https://doi.org/10.4271/2019-01-1107.Data Sets - Support Documents
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