磁流变悬架系统电磁干扰机理与抑制方法研究

The challenge semi-active controller synthesis of vehicle semi-active suspension with magneto-rheological (MR) dampers has got breakthrough in recent years. Whereas, the electromagnetic compatibility （EMC）problem of MR suspension has not been considered by scholars in this field, which has potential harm on vehicle motion safety and will heavily restrict its application in real vehicle, because MRD can not only generate strong electromagnetic interference (EMI) noises, but also easily couple the high frequency EMI noises, yielded by surrounding electromagnetic field in the vehicle. The project study focuses on following three parts of content, which includes: 1) proposing modified magnetic circuit design of MRD and novel smooth filtering algorithm of control signal, based upon modeling the generated EMI noises in MRD; 2) proposing a coordinate control policy for effectively suppressing EMI noises and chaotic motion, generated in MR quarter-vehicle suspension system, so as to consummate the semi-active controller synthesis of MR suspension; 3) proposing a EMI filter based shielding line design to suppress the coupling influence of space high frequency EMI noises on MR suspension controller, according to established coupling noise current model between the MR suspension controller lines and the surrounding electromagnetic field in the vehicle. Consequently, an ideal EMC comprehensive governing scheme of MR suspension is presented, and associated experiment study is conducted. The study is helpful for consummating the semi-active decoupling control theory of MR full-vehicle suspension, proposed by the applicant.

近年来，磁流变（MR）车辆悬架系统半主动控制器设计难题已取得了突破性进展。然而，磁流变阻尼器（MRD）易产生强电磁干扰（EMI）噪声和受车载环境电磁场高频噪声的耦合影响，对车辆运行安全性产生潜在的危害，将严重制约MR悬架在实际车辆中的推广应用，该研究尚未得到国内外学者的重视。本项目涉及如下三方面研究内容：1）建立MRD的EMI噪声模型，提出MRD磁路改进设计和对控制信号平滑滤波新算法；2）分析"四分之一"车辆MR悬架系统产生EMI噪声和混沌运动的关联性机理，提出对其有效抑制的协同控制策略，完善MR悬架系统半主动控制器设计；3）建立MR悬架系统与车载环境电磁场间的耦合噪声电流模型，设计两端带EMI滤波器的屏蔽线缆，以抑制空间高频EMI噪声对MR悬架控制器的耦合影响，建立理想的MR悬架系统电磁兼容综合治理方案，并开展相应的实验研究，完善申请人提出的MR整车悬架系统半主动解耦控制理论体系。

近年来，磁流变（MR）车辆悬架系统半主动控制器设计难题已取得了突破性进展。然而，磁流变阻尼器（MRD）易产生强电磁干扰（EMI）噪声和受车载环境电磁场高频噪声的耦合影响，对车辆运行安全性产生潜在的危害，将严重制约MR 悬架在实际车辆中的推广应用，该研究尚未得到国内外学者的重视，正是本项目的研究重点，经过四年实施，预期目标已完成，建立了MRD的传导和辐射EMI噪声模型、“四分之一”车辆MR悬架系统的混沌运动和EMI噪声协同控制策略及MR悬架控制器线缆与车载环境电磁场的耦合噪声电流模型，揭示了MR悬架系统驱动电流引起EMI噪声的机理，提出了能有效抑制EMI噪声的MR悬架系统电磁兼容（EMC）综合治理方案，与MR整车悬架系统半主动解耦控制器设计结合，建立起具有理想EMC和悬架性能的MR整车悬架系统半主动解耦控制理论体系。