基于模糊PID的半主动悬架控制策略研究

针对传统被动悬架平顺性不足的问题，本文研究了基于模糊PID的半主动悬架控制策略。通过CarSim软件建立某C级轿车的整车模型，基于模糊PID控制原理在Simulink中设计控制器并配置相关参数，建立基于滤波白噪声的路面模型，并将其载入CarSim软件。通过在CarSim中设置数据输入、输出仿真端口，将车辆模型运行数据通过S-Function模块发送到Simulink中求解控制信号，再通过S-Function模块施加到CarSim中，形成闭环控制系统，最后进行联合仿真试验验证模糊PID控制算法的有效性。仿真结果表明，配置有模糊PID控制器的半主动悬架明显改善了车辆的平顺性。该研究具有广阔的应用前景。     

七自由度整车半主动悬架仿真研究

通过MATLAB软件建立整车七自由度的动力学仿真模型。半主动悬架采用双模糊控制器,将计算出的刚性车身与悬架连接处的速度、动行程与俯仰角参数作为主动悬架控制的输入量;前轴左右车轮,悬架与车身连接处的速度与其期望值的误差及其变化率作为第一控制力输入量,刚性车身质心俯仰角速度与其期望值的误差及其变化率作为第二控制力输入量;后轴左右车轮,车悬架与车身连接处的速度与其期望值的误差及其变化率作为第一控制力输入量,悬架动行程与其期望值的误差及其变化率作为第二控制力输入量。计算结果表明:采用双模糊控制器能明显改善整车行驶的舒适性与稳定性,系统综合特性较好,刚性车身的垂向加速度、俯仰角加速度、前后悬架动行程性能提升明显,分别提升27.2%,19.6%,95.5%,33.8%。     

车辆半主动悬架的控制策略及仿真

作者综述了汽车悬架控制系统的基本类型 ,以半主动悬架为研究对象 ,推导建立出汽车两自由度 1/ 4车体模型 ,提出了一种汽车半主动悬架系统的模糊控制方法 ,并利用MATLAB进行仿真 ,对结果进行分析 ,证明了该控制策略的有效性     

车辆半主动悬架的仿真研究

提出了一种根据车速，路谱和载荷实时调节悬架参数的产主动悬架设计方案。将车辆模化为七自由度振动系统，采用频域法进行随机响应计算，仿真结果表明同传统的被动悬架相比这种半主动悬架可使车身振动显著减小，提高了平顺性和操纵稳定性。     

基于联合仿真技术的半主动悬架混合控制策略研究

为减少汽车半主动悬架系统开发周期和成本,利用多体动力学仿真软件SIM—PACK建立了某轿车单斜臂式悬架虚拟样机模型,并在MATLAB／SIMULINK环境中设计了基于混合控制策略的半主动悬架控制器,建立了一个半主动悬架控制策略研究的集成环境,利用该集成环境研究了基于混合控制策略的半主动悬架车辆行驶性能。与被动悬架相比,当汽车以72km／h在B级路面上行驶,阻尼力分配系数a为0．6时,混合控制策略下的半主动悬架车身垂向加速度均方根值和悬架动行程均方根值分别下降了17．38％和43．24％,而轮胎动载荷均方根值仅增加了4．42％。研究结果表明,基于混合控制策略的半主动悬架可以有效衰减车身的振动,改善车辆行驶平顺性,而车辆道路友好性并没有发生恶化。     

基于AMESim／Simulink的磁流变半主动悬架系统性能仿真

对车辆磁流变半主动悬架系统进行了高效且简单的AMESim建模,以经典模糊控制理论为基础在Simulink中建立其控制模块,并进行联合仿真。结果表明,所建的模型正确,控制模块有效实现了对磁流变半主动悬架系统的控制,同时也表明,基于磁流变半主动悬架系统的车辆具有更好的行驶平顺性。     

半主动悬架模糊PID控制器设计及仿真分析

针对传统悬架控制精度低、稳定性较差等缺陷,设计了一种半主动悬架模糊PID控制器.首先,在Matlab/Simulink模块中建立模糊PID控制器模型,以簧载质量的位移偏差及其变化量作为输入参数,输出参数为KP、KI、KD;然后,应用Adams软件搭建汽车1/4半主动悬架模型;最后,进行Simulink和Adams联合仿...     

基于模糊PID控制器的1/2整车半主动悬架仿真研究

通过抽象简化建立1/2整车半主动悬架数学模型,并在MATLAB软件中搭建仿真模型;计算出被动悬架的簧载质量、速度及其变化率,并作为主动悬架控制的输出量。半主动悬架采用模糊PID复合控制器,用模糊控制策略对PID控制器在给定的参数范围内进行在线实时调整。研究结果表明:采用模糊PID复合控制器的半主动悬架在不同车速阶段,对改善整车的总体性能有明显作用,车身垂直加速度、车身俯仰角加速度、前后悬架动行程改善明显,提升了整车在不同车速范围内的乘坐舒适性和操纵稳定性。     

基于磁流变减振器汽车半主动悬架的最优控制仿真

建立了二自由度1/4汽车半主动悬架模型,在线性最优化理论的基础上设计出磁流变减振器半主动悬架的最优控制器,并在MATLAB/SIMULINK环境下进行仿真,结果表明采用最优控制器的流变减振器半主动悬架有效地改善了汽车行驶平顺性和乘坐舒适性。     

基于联合仿真的半主动悬架车辆平顺性

为减少车辆悬架系统开发周期和成本,利用SIMPACK软件建立了车辆1／4悬架多体动力学模型,基于天棚控制策略设计了半主动悬架控制器,并通过MATLAB／SIMULINK编写了控制算法对其进行联合仿真．将采用半主动悬架系统得到的仿真结果与采用被动悬架系统得到的仿真结果进行了对比,车身垂直加速度均方根值减少了30．2％．结果表明,基于天棚控制的半主动悬架可以有效衰减车身的振动,改善车辆的行驶平顺性,从而为车辆动力学系统的仿真分析提供了一种有效方法．     

基于空气悬架客车1/2模型的模糊控制仿真

为了改善空气悬架客车动态性能的控制效果,以空气悬架客车1/2 模型为控制对象,以车身垂直运动和俯仰运动加速度为控制指标,以B级路面为随机输入,应用模糊控制技术对1/2车辆模型进行了计算机控制仿真分析。结果表明:在引入垂直振动和俯仰振动2 个控制器后,车辆的行驶平顺性和操纵稳定性均得到了明显改善。     

Fuzzy Logic Control for Semi-Active Suspension System of Tracked Vehicle

The model of half a tracked vehicle semi-active suspension is established. The fuzzy logic controller of the semi-active suspension system is constructed. The acceleration of driver‘s seat and its time derivative are used as the inputs of the fuzzy logic controller, and the fuzzy logic controller output determines the semi-active suspen-sion controllable damping force. The fuzzy logic controller is to minimize the mean square root of acceleration of the driver‘s seat. The control forces of controllable dampers behind the first road wheel are obtained by time delay, and the delay times are determined by the vehicle speed and axles distances. The simulation results show that this control method can decrease the acceleration of driver‘s seat and the suspension travel of the first road wheel,the ride quality is improved obviously.     

Fuzzy Control of Semi-Active Suspension Based on 7-DOF Tracked Vehicle

On the basis of analyzing the system constitution of tracked vehicle semi-active suspension,which consists of electrorheological(ER) damper and shape memory alloy(SMA) spring,a seven degree of freedom(7-DOF) dynamic model is established.The change of the elasticity of SMA spring and the characteristics of the ER shock absorber are studied.In addition,the study about fuzzy control logic is also carried out.Simulation of a C grade road under random excitations and definite disturbances is performed.Simulation result shows the fuzzy control strategy,which is used in the control of semi-active suspension system with ER damper and SMA springs,is effective,stable and reliable.     

Fuzzy Control of Semi-Active Suspension Based on 7-DOF Tracked Vehicle

On the basis of analyzing the system constitution of tracked vehicle semi-active suspension, which consists of electrorheological (ER) damper and shape memory alloy (SMA) spring, a seven degree of freedom (7-DOF) dynamic model is established. The change of the elasticity of SMA spring and the characteristics of the ER shock absorber are studied. In addition, the study about fuzzy control logic is also carried out. Simulation of a C grade road under random excitations and definite disturbances is performed. Simulation result shows the fuzzy control strategy, which is used in the control of semi-active suspension system with ER damper and SMA springs, is effective, stable and reliable.     

Analyses and Simulation of Fuzzy Logic Control for Suspension System of a Track Vehicle

The vibration caused by terrible road excitation affects the ride quality and safety of track vehicles.The vibration control of suspension systems is a very important factor for modern track vehicles.A fuzzy logic control for suspension system of a track vehicle is presented.A mechanical model and a system of differential equations of motion taking account of the mass of loading wheel are established.Then the fuzzy logic control is applied to control the vibration of suspension system of track vehicles for sine signal and random road surfaces.Numerical simulation shows that the maximum acceleration of suspension system can be reduced to 44% of the original value for sine signal road surface,and the mean square root of acceleration of suspension system can be reduced to 21% for random road surface.Therefore,the proposed fuzzy logic control is an efficient method for the suspension systems of track vehicles.     

空气悬架的神经网络模糊控制及仿真分析

空气悬架系统是一个非线性系统,该系统工作环境是时变性的。提出了基于神经网络的模糊控制策略,应用该控制策略对某一高级客车的空气悬架刚度进行控制,可以根据车辆振动响应的结果来判断车体的振动情况以后,实时调节空气悬架刚度,使车辆对路面的变化具有适应能力,从而改善汽车行驶平顺性。     

汽车姿态的离散性半主动控制

在线性最优控制理论的基础上，采用轴间预瞄技术和Ｐａｄｅ近似方法，建立考虑前、后车轮下路面不平度输入相关性的汽车半主动悬架系统动力学模型和控制律，以优化连续阻尼和部分系统动态响应量作为参数，构造半主动悬架系统的离散优化阻尼控制律。提出的半主动悬架控制方法能改善乘坐舒适性，并能较好地抑制离散化控制中存在的高频震颤     

基于AMESim的工程车辆液压悬架系统仿真

为研究液压悬架系统中各主要参数对控制车体垂直位移的影响,在建立的单轮1/4车液压悬架数学模型基础上,运用AMESim软件进行了1/4车液压悬架建模与仿真分析.通过仿真,将液压缸和伺服阀不同规格参数对液压悬架在阶跃激励下车体垂直位移的影响结果进行了比较,结果表明,AMESim在液压悬架系统仿真中的有效性为整车液压悬架仿真研究提供了参考.     

The Model Reference Adaptive Fuzzy Control for the Vehicle Semi-Active Suspension

The LQG control system is employed as vehicle suspension‘ s optimal target system, which has an adaptive ability to the road conditions and vehicle speed in a limited bandwidth. In order to keep the optimal performances when the suspension parameters change, a model reference adaptive fuzzy control (MRAFC) strategy is presented. The LQG control system serves as the reference model in the MRAFC system. The simulation results indicate that the presented MRAFC system can adapt to the parameters variation of vehicle suspension and track the optimality of the LQG control system, the presented vehicle suspension MRAFC system has the ability to adapt to road conditions and suspension parameters change.     

基于比例阀的车辆液压主动悬架系统的设计与仿真

以高性能电液比例阀为作动器,设计了车辆主动悬架系统。基于主动悬架车辆1／4动力学模型,采用PID控制器,利用Matlab软件建立了主动悬架汽车动力学仿真模型,并用某车型数据进行了动力学分析和仿真。仿真结果表明,比例控制技术应用于主动悬架控制是可行的。