采用磁流变阻尼器的人体座椅悬架系统模糊ANFIS-PID复合控制技术研究

对座椅悬架用单出杆式磁流变阻尼器进行阻尼特性试验,并借助MATLAB多项式拟合工具箱对改进多项式模型中未知参数进行辨识。分析人体振动特性,建立五自由度人体座椅悬架模型。综合模糊控制器与自适应模糊神经推理系统(Adaptive Neuro-Fuzzy Inference System,ANFIS)整定PID控制器的优点,提出一种模糊ANFIS-PID复合控制策略。采用正弦信号作为外界激励,分别对被动悬架、传统模糊控制、ANFIS-PID控制及模糊ANFIS-PID复合控制人体座椅悬架系统进行仿真分析。结果表明,辨识得出的参数和建立的改进多项式模型均可满足后续仿真要求;采用模糊ANFIS-PID复合控制策略的隔振效果明显优于传统模糊控制及ANFIS-PID控制,能有效改善人体座椅悬架系统的行驶平顺性及驾乘人员乘坐舒适性。

Fuzzy ANFIS-PID compound control technology of human seat suspension system using magnetorheological damper

The damping characteristics of the single rod magnetorheological(MR)damper used for the seat suspension system were tested,and the unknown parameters in the improved polynomial model were identified by using MATLAB polynomial fitting toolbox.The model of five degree of freedom(5-DOF)human seat suspension was established by analyzing the vibration characteristics of human body.A fuzzy ANFIS-PID compound control strategy was proposed by combining the advantages of fuzzy controller and the adaptive neuro-fuzzy inference system tuning PID controller.Taking the sinusoidal signal as external excitation,the simulation analysis of passive suspension,traditional fuzzy control,ANFIS-PID control and fuzzy ANFIS-PID compound control of human seat suspension system were carried out respectively.The results show that the identified parameters and the established mechanical model can satisfy the requirements of subsequent simulation.And the vibration isolation effects of the compound control strategy of fuzzy ANFIS-PID is obviously better than those of traditional fuzzy control and ANFIS-PID control,which can effectively improve the ride comfort of human seat suspension system and the driver and passengers.