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为了提高车辆的道路友好性与平顺性,设计了以磁流变减振器为控制对象的整车自适应模糊控制半主动悬架系统。在试验测试和理论分析的基础上,建立了基于磁流变减振器的整车半主动悬架模型及其状态方程,并用该模型对自适应模糊控制方法进行了研究。模型的输入采用B级和C级路面谱;道路友好性评价指标采用动载荷系数和动载荷应力因子;使用MATLAB/Simulink建立基于2个自适应模块的模糊控制器控制系统,模糊控制器的输入均采用车身与车桥的相对速度和相对加速度。仿真结果表明:与被动悬架相比,在B级和C级路面、不同速度下,半主动自适应悬架动载荷系数均降低30%左右,动载荷应力因子均降低40%以上,同时也提高了车辆的运行平顺性和稳定性。
In order to improve the road friendliness and ride comfort, a vehicle adaptive fuzzy control semi-active suspension system with MR damper is designed. Based on the experimental test and theoretical analysis, a semi-active vehicle suspension model and its equation of state based on MR damper are established and the adaptive fuzzy control method is studied. The input of the model adopts the grade B and C pavement spectrum; the road friendly evaluation index adopts dynamic load coefficient and dynamic load stress factor; the fuzzy controller control system based on two adaptive modules is established by using MATLAB / Simulink, the input of fuzzy controller Both body and axle are used relative speed and relative acceleration. The simulation results show that the dynamic load coefficients of semi-active self-adaptive suspension are reduced by about 30% and the stress factor of dynamic load is reduced by more than 40% compared with passive suspension at B and C road surface, Improve the smooth operation of the vehicle and stability.