车辆直行爆胎过程的模糊PI控制  

Fuzzy PI Control of Blow-out Process of Straight Vehicle

作　　者：周磊[1] 张向文[1] 

机构地区：[1]桂林电子科技大学电子工程与自动化学院,广西桂林541004

出　　处：《计算机仿真》2012年第11期345-349,共5页Computer Simulation

基　　金：国家自然科学基金项目(60804059);广西自然科学基金项目(2010GXNSFA013130)

摘　　要：车辆的爆胎过程是一个非常复杂的非线性过程,轮胎的力学特性会发生非常快的变化,理论和实验研究都非常困难。根据对爆胎车辆运动特性的分析,建立了二自由度车辆理想运动模型,利用刷子模型模拟爆胎过程中轮胎力学特性的变化,并在Simulink中搭建了七自由度整车模型,仿真车辆在高速直行情况下前轮或后轮发生爆胎后的运动状态。以车辆的横摆角速度作为控制变量,并考虑质心侧偏角的影响,设计了模糊PI控制器,利用差别制动的方式对爆胎车辆进行控制仿真,仿真结果表明,模糊PI控制器能够很好地控制车辆爆胎过程的稳定性,并且能够缩短制动距离。The process of tire blow-out is a complex nonlinear process and the change of tire＇s mechanical proper- ties is very quickly. So the theoretical and experimental studies are very difficult. Based on the analysis of motion characteristics of the vehicle tire, a two degree of freedom vehicle model was built. Brush model was used to simulate the change of the tire＇s mechanical properties. And a seven degree of freedom vehicle model was built with Simulink to simulate the state after front and rear wheels blow-out when the vehicle was at high speed straight. Using the vehi- cle yaw rate as the control variable and considering the impact of the side slip angle, a fuzzy PI controller was de- signed. A differential brake method was set up to simulate vehicle behavior after tire blow-out. Simulation results show that the fuzzy PI controller can control the stability of vehicle of tire blow-out very well and shorten the braking distance.

关 键 词：爆胎 刷子模型 整车模型 模糊控制 差别制动 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]