Modeling and pressure tracking control of a novel electro-hydraulic braking system
A brake-by-wire system is considered the best solution to realize advanced functions in electric vehicles/hybrid electric vehicles and intelligent vehicles. In this article, a novel electro-hydraulic brake system is proposed. The main issues in the development of the proposed electro-hydraulic brake system focus on hydraulic loop design and pressure tracking control. Instead of an accumulator, a large displacement piston pump coupled to a high-power motor is applied to meet the demand of pressure boost. A passive pedal feel simulator is designed to decouple the brake pedal and the wheel cylinders. The high pressure in the wheel cylinders is controlled by de/activating the motor and valves to track the reference pressure. To minimize the pressure instability observed in previous proportional–integral–derivative controller tests, a self-tuning generalized predictive controller is applied. Models of each system’s dynamic process are derived, and the parameters are identified through test data. A sliding mode differentiator is used to filter the sensor signals and improve the pressure boost performance in hard brake maneuvers. A rapid control prototype test environment based on dSPACE is built to verify and adjust the controller. The simulation results using MATLAB/Simulink and bench tests are presented and analyzed. Tracking performances show that compared to a proportional–integral–derivative controller, the proposed controller has a better effect in lowering pressure overshoots and start–stop frequency.
- Record URL:
- Find a library where document is available. Order URL: http://worldcat.org/issn/16878132
- © 2018 Zhe Xiong et al.
- Publication Date: 2018-3
- Media Type: Digital/other
- Features: Figures; Photos; References;
- Pagination: 16p
Open Access (libre)
- TRT Terms: Electric brakes; Hydraulic brakes; Prototypes; Vehicle design
- Subject Areas: Design; Highways; Vehicles and Equipment;
- Accession Number: 01778957
- Record Type: Publication
- Files: TRIS
- Created Date: Jun 6 2020 3:17PM