Fuzzy Control of Semi-active Suspension with Variable Stiffness and Damping

doi:10.3969/j.issn.1674－0696.2012.03.29

Abstract

Abstract: On the purpose of improving ride comfort，a new four degree-of-freedom semi-active suspension with variable stiffness and damping was established． And a common fuzzy control system and a variable universe fuzzy control system were designed according to the fuzzy control theory． The passive suspension model and the semi-active suspension models with two different fuzzy control systems were built and simulated with random road input of integral white noise in MATLAB/SIMULINK． The results of the simulation show that，the vehicle’s vertical acceleration and pitch angular acceleration of the semiactive suspension with variable stiffness and damping are much smaller than the accelerations of passive suspension，and the ride comfort is effectively improved.The results also show that the variable universe fuzzy controller is better than the common fuzzy controller on decreasing vibration．

Key words: variable stiffness and damping, semi-active suspension, fuzzy control, variable universe fuzzy control

摘要： 为提高车辆的乘坐舒适性，建立了一种新型的四自由度的变刚度和阻尼半主动悬架模型。根据模糊控制理论，设计了两种适用于此模型的模糊控制器:常规模糊控制器和变论域模糊控制器。在MATLAB/SIMULINK仿真软件中建模，以积分白噪声随机路面输入作为激励，对被动悬架模型、常规模糊控制和变论域模糊控制的半主动悬架模型进行了仿真。仿真结果表明，与被动悬架相比，变刚度和阻尼半主动悬架能够有效降低车身垂直加速度和车身俯仰角加速度，有效地提高了车辆的乘坐舒适性。同时还表明，悬架的变论域模糊控制的减振效果优于常规模糊控制的。

关键词: 变刚度和阻尼, 半主动悬架, 模糊控制, 变论域模糊控制

CLC Number:

U463.33

Fan Fangqiang,Pan Gongyu. Fuzzy Control of Semi-active Suspension with Variable Stiffness and Damping[J]. Journal of Chongqing Jiaotong University(Natural Science), 2012, 31(3): 482-485.

范方强，潘公宇. 变刚度和阻尼半主动悬架的模糊控制研究[J]. 重庆交通大学学报（自然科学版）, 2012, 31(3): 482-485.

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