ABSTRACT

Active suspension system has become an integral part of a passenger vehicle as ride comfort is now an essential parameter in the performance of a vehicle. The active suspension system claims complete control over the driver body motion, thus improving the overall ride quality. This work intends to reduce the entire body acceleration of the driver, thereby improving the ride comfort by designing and implementing an efficient controller for an active quarter car system. The proposed Adaptive Fuzzy tuned Fractional Order PID Controller (AFFOPID) is designed and analyzed for a 3 Degree of Freedom (DOF) active quarter car system, incorporating a driver model using MATLAB/SIMULINK software. The efficiency of AFFOPID is dissected against the performance of Fractional Order PID (FOPID), PID and Passive System. The Active Quarter Car Driver model (AQCD) is exposed to single bump, sinusoidal bump and ISO 8606 standards random road for interruptions and the respective results are reviewed. The simulation outcomes of the active quarter car driver model with AFFOPID improve the ride comfort by reducing the Driver Body Acceleration (DBA) amplitude, over all three road profiles. The results, thus validated in-terms of Frequency Weighted Root Mean Square (FWRMS) and Vibration Dose Value (VDV) as per ISO 2631–1 standards, reveal that the AFFOPID reduces the vibration to the best desirable range in comparison to the contemporary FOPID and PID controllers.

摘要

主动悬架系统已成为乘用车不可或缺的一部分，因为乘坐舒适性现在是车辆性能的重要参数。主动悬架系统声称可以完全控制驾驶员身体的运动，从而提高整体乘坐质量。这项工作旨在通过为主动式四分之一汽车系统设计和实施高效控制器来降低驾驶员的全身加速度，从而提高乘坐舒适性。提出的自适应模糊调谐分数阶 PID 控制器 (AFFOPID) 是针对 3 自由度 (DOF) 有源四分之一汽车系统设计和分析的，并使用 MATLAB/SIMULINK 软件结合了驾驶员模型。AFFOPID 的效率根据分数阶 PID (FOPID)、PID 和无源系统的性能进行了剖析。Active Quarter Car Driver 模型 (AQCD) 暴露于单颠簸、正弦颠簸和 ISO 8606 标准随机道路中断，并审查了各自的结果。具有 AFFOPID 的主动式四分之一汽车驾驶员模型的仿真结果通过在所有三种道路剖面上降低驾驶员身体加速度 (DBA) 幅度来提高乘坐舒适性。结果根据 ISO 2631-1 标准在频率加权均方根 (FWRMS) 和振动剂量值 (VDV) 方面进行了验证，表明与当代 FOPID 相比，AFFOPID 将振动降低到最佳范围和 PID 控制器。具有 AFFOPID 的主动式四分之一汽车驾驶员模型的仿真结果通过在所有三种道路剖面上降低驾驶员身体加速度 (DBA) 幅度来提高乘坐舒适性。结果根据 ISO 2631-1 标准在频率加权均方根 (FWRMS) 和振动剂量值 (VDV) 方面进行了验证，表明与当代 FOPID 相比，AFFOPID 将振动降低到最佳范围和 PID 控制器。具有 AFFOPID 的主动式四分之一汽车驾驶员模型的仿真结果通过在所有三种道路剖面上降低驾驶员身体加速度 (DBA) 幅度来提高乘坐舒适性。结果根据 ISO 2631-1 标准在频率加权均方根 (FWRMS) 和振动剂量值 (VDV) 方面进行了验证，表明与当代 FOPID 相比，AFFOPID 将振动降低到最佳范围和 PID 控制器。