汽车磁流变半主动悬架控制方法研究

根据变论域方法对经典模糊控制算法进行了改进，提出了悬架阻尼力变论域模糊控制算法。根据悬架阻尼控制力与磁流变阻尼器输出阻尼力的力误差，设计了磁流变阻尼器驱动电流控制方法。由汽车结构振动模糊控制子系统和磁流变阻尼器驱动电流控制子系统构建了磁流变半主动悬架控制器，用模糊集语言赋值系数反映了悬架伸张行程和压缩行程不对称阻尼控制力的关系。利用二自由度车辆振动系统简化模型和磁流变阻尼器简化力学模型及其参数，确定了控制器结构及其参数。研究结果袁明，该方法具有较好的控制精度和适应能力。

Study on Control Method of Automotive Magnetorheological Semi-active Suspension System

Based on the method of variable universe, the variable universe fuzzy control method for suspension damper was firstly designed. The drive current control method of magnetorheological damper was designed by force error of suspension damper control force and output force of magnetorheological damper. The controller of magnetorheological semi-active suspension system was consisted of drive current control subsystem of magnetorheological damper and mechanical structural fuzzy control subsystem of vehicle, the unsymmetry damping force relation of suspension compress travel and promote travel is solved with coefficient of language-value of damper force output variable. In the light of the simple model and its parameters of 1/4 vehicle and the simple model of magnetorheological damper and its parameters, the structure and parameter of control was defined. The method of system control has better control precision and adaptability.