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Experimental Study on Hydraulic Pressure Feedforward and Feedback PID Control of I-EHB System with Friction Disturbance
Technical Paper
2021-01-0979
ISSN: 0148-7191, e-ISSN: 2688-3627
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SAE WCX Digital Summit
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English
Abstract
This paper designs the important components and structure of the integrated electro-hydraulic brake system (I-EHB). Firstly, the simplified linear system is modeled, and the transfer function without considering the nonlinear disturbance such as system friction is derived, and the correctness of the linear system is preliminarily verified by AMESim. Then set up the I-EHB system test bench, and use the Stribeck friction model to identify the friction torque parameters in the static and kinetic friction stages of the system to obtain a more accurate friction model. Finally, based on the I-EHB system model of friction disturbance, a pressure-speed-current three-loop cascade PID controller is designed, and a feedforward controller based on the system model is added to form the control structure of “pressure feedforward compensation + pressure-speed-current closed-loop cascade PID”. Then tests are carried out on benches, and the I-EHB system achieves a faster and more stable pressure response than traditional PID control.
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Citation
Zhao, S., Chu, W., and Shangguan, W., "Experimental Study on Hydraulic Pressure Feedforward and Feedback PID Control of I-EHB System with Friction Disturbance," SAE Technical Paper 2021-01-0979, 2021, https://doi.org/10.4271/2021-01-0979.Data Sets - Support Documents
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