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Vehicle Validation for Pressure Estimation Algorithms of Decoupled EHB Based on Actuator Characteristics and Vehicle Dynamics
Technical Paper
2020-01-0210
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Recently, electro-hydraulic brake systems (EHB) has been developed to take place of the vacuum booster, having the advantage of faster pressure build-up and continuous pressure regulation. In contrast to the vacuum booster, the pressure estimation for EHB is worth to be studied due to its abundant resource (i.e. electric motor) and cost-effective benefit. This work improves an interconnected pressure estimation algorithm (IPEA) based on actuator characteristics by introducing the vehicle dynamics and validates it via vehicle tests. Considering the previous IPEA as the prior pressure estimation, the wheel speed feedback is used for modification via a proportional-integral (PI) observer. Superior to the IPEA based on actuator characteristics, the proposed PEA improves the accuracy by more than 20% under the mismatch of pressure-position relation. Most importantly, this study realized a high-precision and robust pressure estimation with built-in sensors, which provides a high cost-effective solution for pressure modulation of decoupled motor-driven-type EHB.
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Han, W., Xiong, L., Yu, Z., and Xu, S., "Vehicle Validation for Pressure Estimation Algorithms of Decoupled EHB Based on Actuator Characteristics and Vehicle Dynamics," SAE Technical Paper 2020-01-0210, 2020, https://doi.org/10.4271/2020-01-0210.Data Sets - Support Documents
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