轮缸压力估算与控制仿真研究  

Simulating Pressure Estimation and Control of Wheel Cylinder

作　　者：黄丰云 刘伟光 魏翼鹰 蒋园健 李豪 HUANG Fengyun;LIU Weiguang;WEI Yiying;JIANG Yuanjian;LI Hao(School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430000,China)

机构地区：[1]武汉理工大学机电工程学院,武汉430000

出　　处：《机械科学与技术》2021年第1期132-138,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：轻量化汽车底盘关键零部件智能工厂新模式(政府收支分类2159999,预算号21507707999107)。

摘　　要：汽车传统制动系统一般都是采用PWM(Pulse width modulation)控制技术来调节轮缸压力,根据占空比与轮缸压力变化关系控制增、减压。但是通过探究高速开关阀PWM控制特性,发现PWM控制减压有效占空比范围小,难以实现压力精确调控。因此结合查表法增压、阶梯法减压,提出了一种分段控制方法。并且将轮缸压力估算算法应用到压力控制中,作为压力控制环反馈。通过搭建Simulink/AMEsim联合仿真模型对压力估算算法和压力控制算法进行了验证,证明了估算算法的准确性和压力控制算法的可行性、优越性。The conventional hydraulic braking system generally adopts the PWM(Pulse width modulation)control technology to regulate the wheel cylinder pressure.It controls the increase and decrease of the pressure according to the correspondence between duty ratio and wheel cylinder pressure variation.However,by studying the PWM dynamics characteristics of a solenoid valve,it was found that the effective duty ratio range was small when the pressure of the braking system is reduced and that it is difficult to achieve precise pressure and high efficiency regulation.Therefore,a segmentation control method was proposed in this paper,based on the look-up table method and the stepped decompression control.The wheel cylinder pressure estimation algorithm was applied to the pressure control;the wheel cylinder′s estimated pressure was used as feedback of the pressure closed-loop control system.With the Simulink/AMEsim co-simulation platform,the computer simulation was carried out to verify the pressure estimation algorithm and the pressure control algorithm.The accuracy of the estimation algorithm and the feasibility and superiority of the pressure control algorithm were proved.

关 键 词：PWM控制 压力估算 压力控制 查表法 阶梯减压 

分 类 号：TH137[机械工程—机械制造及自动化]