汽车磁流变半主动悬架自适应模糊控制研究
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摘要
针对汽车磁流变半主动悬架存在非线性及不确定性等因素而难以控制的问题,提出采用自适应模糊控制策略并进行了研究。在分析磁流变减振器输入输出特性的基础上,针对1/4车辆悬架模型设计了自适应模糊控制器并进行了仿真分析。以某微型车为试验用车,搭建了平顺性道路试验系统,进行了不同车速、不同控制策略(自适应模糊控制和天棚控制)下的随机路面试验,试验结果与仿真结果相吻合,说明将自适应模糊策略应用于半主动控制是可行的,能够抑制车身的垂直振动,提高乘坐的舒适性,且控制效果要优于天棚控制。
Due to nonlinearity and uncertainty of magnetorheological(MR) semiactive suspension which was difficult to control,an adaptive fuzzy logic controller(AFLC) was proposed and studied.After analyzing input and output characteristics of MR dampers,an AFLC was designed for a quarter car model and numerical simulation was also studied.Then,a mini-car was selected as the test car and experimental system was fabricated.Road tests were carried on three velocities and two control strategies including AFLC and skyhook control.The experimental results with the similarity of simulation result show that AFLC is feasible and can achieve good effects to restrain the vertical vibration of car body compared with passive suspension and has better control performance than skyhook control.
Due to nonlinearity and uncertainty of magnetorheological(MR) semiactive suspension which was difficult to control,an adaptive fuzzy logic controller(AFLC) was proposed and studied.After analyzing input and output characteristics of MR dampers,an AFLC was designed for a quarter car model and numerical simulation was also studied.Then,a mini-car was selected as the test car and experimental system was fabricated.Road tests were carried on three velocities and two control strategies including AFLC and skyhook control.The experimental results with the similarity of simulation result show that AFLC is feasible and can achieve good effects to restrain the vertical vibration of car body compared with passive suspension and has better control performance than skyhook control.
引文
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[2]陈水生.高架桥梁地震响应磁流变阻尼器(MR)半主动控制[J].长安大学学报:自然科学版,2003,23(6):40-43.CHEN Shui-sheng.Magneto-Rheological(MR)Damp-ers Semi-active Control of Earthquake Response for El-evated Bridge[J].Journal of Chang an University:Nat-ural Science Edition,2003,23(6):40-43.
[3]SIMON D,AHMAPIAN M.Vehicle Evaluation of thePerformance of Magneto-Rheological Dampers forHeavy Truck Suspensions[J].ASME,2001,123(7):365-366.
[4]CHOI S B,LEE H S.Control and Response Character-istics of a Magneto-Rheological Fluid Damper for Pas-senger Vehicle[J].SPIE,2000,3985:438-443.
[5]郑玲,邓兆祥,李以农.汽车半主动悬架的模型参考自适应控制[J].中国公路学报,2005,18(2):99-102.ZHENG Ling,DENG Zhao-xiang,LI Yi-nong.ModelReference Adaptive Control of Semi-active Suspensions[J].China Journal of Highway and Transport,2005,18(2):99-102.
[6]余淼.汽车磁流变半主动悬架控制系统研究[D].重庆:重庆大学,2003.YU Miao.Study on Control System of Automobile Magne-torheological Semi-active Suspension[D].Chongqing:Chongqing University,2003.
[7]喻凡,郭孔辉.结合卡尔曼滤波器的车辆主动悬架轴距预瞄控制研究[J].汽车工程,1999,21(2):71-80.YU Fan,GUO Kong-hui.A Study Wheel Base PreviewControl for Active Vehicle Suspension System with aKalman Filter[J].Automotive Engineering,1999,21(2):71-80.
[8]GB/T 4970-1996,汽车平顺性随机输入行驶试验方法[S].GB/T 4970-1996,Method of Random Input RunningTest-Automotive Ride Comfort[S].
[9]余志生.汽车理论[M].北京:机械工业出版社,2000.YU Zhi-sheng.Automobile Theory[M].Beijing:Me-chanical Industry Press,2000.
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