基于联合型模糊PID的非线性空气悬架建模与控制  

Modeling and Control of Nonlinear Air Suspension Using Combined Fuzzy-PID Control Method

作　　者：詹长书[1] 孙世磊[1] 

机构地区：[1]东北林业大学交通学院,哈尔滨150040

出　　处：《武汉理工大学学报（交通科学与工程版）》2014年第4期730-733,738,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家博士后科学基金面上项目资助(批准号:2013M541329)

摘　　要：为提高汽车空气悬架的行驶平顺性,针对空气弹簧的非线性特性,建立空气弹簧关于气囊压力、有效面积、垂向变形等因素有关的弹力模型.利用所建立的空气弹簧弹力模型建立单轮1/4车辆动力学模型.以车身加速度最小为控制目标,设计并建立非线性空气悬架的联合型模糊PID控制器.运用MATLAB/Simulink仿真软件,以气囊压力变化所产生的力作为控制输出量,进行计算机动态仿真.仿真结果表明:与被动空气悬架相比,针对非线性空气悬架所设计的联合型模糊PID控制器对车辆平顺性与道路友好性有显著的改善.To improve vehicle the ride comfort of air suspension,firstly,air spring of elastic model was established with respect to cuff pressure,the effective area,vertical deformation and other factors.Secondly,the model of quarter vehicle dynamic based on the nonlinear characteristics of the air spring is established.Thirdly,with the aim to control the body acceleration,combined fuzzy-PID controller for air suspension was designed.Using MATLAB/Simulink simulation software,with the force produced was carried out by air pressure changes as the output and dynamic simulation by computer in this paper.Simulation results the designed controller for non-linear air suspension on the vehicle improved significantly the ride comfort and road friendliness.

关 键 词：空气悬架 非线性 模糊控制 平顺性 道路友好性 

分 类 号：U463.33[机械工程—车辆工程]