Research on brake intent recognition and control of EHB system based on fuzzy reasoning

doi:10.16731/j.cnki.1671-3133.2024.05.008

Abstract

Abstract: In order to improve the accuracy of braking intent recognition of brake-by-wire system and make it have stronger braking scene adaptability,a braking intent recognition strategy based on fuzzy reasoning algorithm was designed,which uses vehicle gear,tire angle,brake pedal opening and brake pedal speed as characteristic parameters to reason the driver′s braking intention and the vehicle driving scene in real time,and matches the expected pressure value and dynamic characteristics of the brake-by-wire system pipeline based on the actual braking demand of the vehicle in each scenario.This strategy adopts the PID closed-loop pressure control strategy based on the FOC control algorithm of permanent magnet synchronous motor to track the expected pressure assigned by the fuzzy inference model in different braking intentions and braking scenarios in real time,and realizes the accurate conversion from the expected pressure to the actual pressure of the system pipeline,and successfully assigns the dynamic characteristics of pressure changes matched to the expected pressure in different scenarios to the actual pressure of the pipeline,and realizes the differentiated control of the actual pressure dynamic characteristics of the offline control system in different scenarios.Finally,based on the overall control strategy,a mechanical hydraulic model and a control algorithm model were built in AMEsim and Simulink,and braking intent recognition and brake pressure tracking were co-simulated,which verified the effectiveness and practicability of the strategy.

Key words: EHBS, fuzzy reasoning, braking intention identification, pressure tracking control, field-oriented control, braking scene

CLC Number:

U463.5

WU Guangqing, SUN Youping, LI Song, WANG Guochun. Research on brake intent recognition and control of EHB system based on fuzzy reasoning[J]. Modern Manufacturing Engineering, 2024, 524(5): 56-65.

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