Hydraulic-pressure-following control of an electronic hydraulic brake system based on a fuzzy proportional and integral controller

Significant nonlinearity of electronic hydraulic brake (EHB) systems often leads to complex hydraulic force control responses. This paper designs a motor-driven EHB system and analyzes nonlinear friction induced by the deceleration mechanism. To compensate this friction, a flutter signal is added to...

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Bibliographic Details
Published in:Engineering applications of computational fluid mechanics 2020-01, Vol.14 (1), p.1228-1236
Main Authors: Chen, Qiping, Shao, Hao, Liu, Yu, Xiao, Yuan, Wang, Ning, Shu, Qiang
Format: Article
Language:English
Subjects:
Brakes
Braking
Control methods
Control systems
Controllers
Cylinders
Deceleration
EHB system
electric vehicle
Electric vehicles
Emergency response
Flutter
Fuzzy control
fuzzy PI
Hydraulic pressure
hydraulic pressure control
Hydraulics
Integrals
Nonlinear analysis
Nonlinearity
Sine waves
Solenoid valves
Step response
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Summary:Significant nonlinearity of electronic hydraulic brake (EHB) systems often leads to complex hydraulic force control responses. This paper designs a motor-driven EHB system and analyzes nonlinear friction induced by the deceleration mechanism. To compensate this friction, a flutter signal is added to the controller input. In addition, this paper designs a fuzzy-PI (Proportional and Integral) controller for the cylinder hydraulic pressure of the EHB system based on the opening and closing characteristics of a solenoid valve. Response curves of cylinder hydraulic pressure are obtained under three different input signals: step, triangular, and sinusoidal. The co-simulation model is established by AMEsim™ and Simulink® ansofts. The study results indicate that the proposed hydraulic-force-following control method of the EHB system can follow different input signals well. A step response test and a sine-wave-following test are carried out, which correspond to the EHB response in the case of driver's emergency braking and frequent braking, respectively. Stable and rapid pressure build-up is obtained under different step target hydraulic pressures. Therefore, the hydraulic-force-following control method of the EHB system based on a fuzzy-PI controller can satisfy the EHB system accuracy requirements for an electric vehicle, which is a certain valuable for the automobile industry.
ISSN:1994-2060
1997-003X
DOI:10.1080/19942060.2020.1816495