共查询到17条相似文献,搜索用时 140 毫秒
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基于磁流变阻尼器的铁道车辆结构振动半主动控制 总被引:3,自引:0,他引:3
在建立铁道车辆柔刚体系统垂直动力学模型的基础上,应用独立模态空间控制理论和最优控制理论,对影响车辆垂直运行平稳性的车体低阶弯曲结构振动和浮沉、点头等刚体振动进行控制。根据铁道车辆悬挂系统的特点,提出采用磁流变阻尼器作为作动器,以降低车体垂直加速度进而改善运行平稳性为目标的半主动控制策略,来实现在性能改善和能量消耗之间的协调,在ADAMS和Matlab/Simulink?环境下,应用机械系统和控制系统联合仿真技术,对采用半主动控制策略的整车性能进行仿真研究。仿真结果显示该半主动控制策略能较好地抑制车体第一阶弯曲模态的结构振动,并可改善车辆运行平稳性,针对铁道车辆系统的磁流变阻尼器在设计上是可行的。 相似文献
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Yu-Jeong Shin Won-Hee You Hyun-Moo Hur Joon-Hyuk Park 《Journal of Mechanical Science and Technology》2012,26(11):3423-3431
As train operating speeds increase, upgrading the performance of the railway vehicle has been required. To improve the ride comfort related to vibration, researches to replace the conventional passive suspension with (semi)active suspension have been carried out. For the purpose of vibration reduction, the magneto-rheological (MR) damper has been widely applied in automobile or anti-vibration areas, but it hasn??t yet been applied to railway vehicles. In this study, skyhook control with the MR damper was applied to the 1/5 scaled railway vehicle model on roller rig to suppress the lateral vibration of the carbody. For the 1/5 scaled prototype model of the railway vehicle, the dimensions of railway vehicle were scaled down by similarity method. Both numerical analysis and experiments to control the carbody lateral vibration were conducted and compared. The possibility of improving both the ride comfort and running stability of the railway vehicle by using the semi-active control was discussed in detail. 相似文献
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基于磁流变减振器的汽车悬架振动控制 总被引:5,自引:1,他引:5
分析了磁流变减振器特性,为了抑制汽车磁流变悬架的振动,提出了一种含有控制级和协调级的分级模糊控制。在控制级,把天棚、地棚混合控制策略与模糊智能控制策略相结合,设计了1/4车辆垂直振动的半主动模糊智能控制器;在协调级,设计了整车控制的协调器,根据反馈变量对整车4个独立模糊智能控制器输出参数进行调整。把某微型汽车的4只被动减振器改装成磁流变减振器,搭建了磁流变悬架全车测控系统,运用设计的分级模糊控制器,进行了平顺性随机输入实车道路试验。试验结果表明对汽车磁流变悬架的垂直振动进行分级模糊控制是可行的,能有效提高汽车的乘坐舒适性和操纵稳定性。 相似文献
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选择了某微型汽车悬架的磁流变减震器为研究对象,运用汽车动力学理论建立了1/4汽车半主动悬架控制系统动力学模型,基于模糊PID控制算法设计了模糊PID控制器.车辆在不同路面输入谱和不同行驶速度下,以悬架的簧载质量加速度、悬架动挠度和轮胎动载荷3个基本参数来表征磁流变半主动悬架系统的振动特性,运用Matlab/Simulink软件对该悬架系统进行仿真研究,仿真结果表明,当汽车在不同等级的路面上行驶时,随着车速的提高,采用模糊PID控制半主动悬架汽车的簧载质量加速度和悬架动挠度的幅值相对于被动悬架均明显减小,表现出了良好的控制效果.轮胎动载荷与被动悬架的幅度大体相当,偶尔还比被动悬架幅值高,但综合来看,模糊PID控制器能更好地减小汽车振动,进一步提高汽车的乘坐舒适性.结果同时也说明了模糊PID控制具有很好的鲁棒性.采用磁流变减振器的半主动悬架系统有效地改善了汽车乘坐舒适性和操纵稳定性. 相似文献
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ZHANG Hailong WANG Enrong ZHANG Ning MIN Fuhong SUBASH Rakheja SU Chunyi 《机械工程学报(英文版)》2015,(1):63-75
The vehicle semi-active suspension with magneto-rheological damper(MRD) has been a hot topic since this decade, in which the robust control synthesis considering load variation is a challenging task. In this paper, a new semi-active controller based upon the inverse model and sliding mode control(SMC) strategies is proposed for the quarter-vehicle suspension with the magneto-rheological(MR) damper, wherein an ideal skyhook suspension is employed as the control reference model and the vehicle sprung mass is considered as an uncertain parameter. According to the asymptotical stability of SMC, the dynamic errors between the plant and reference systems are used to derive the control damping force acquired by the MR quarter-vehicle suspension system. The proposed modified Bouc-wen hysteretic force-velocity(F-v) model and its inverse model of MR damper, as well as the proposed continuous modulation(CM) filtering algorithm without phase shift are employed to convert the control damping force into the direct drive current of the MR damper. Moreover, the proposed semi-active sliding mode controller(SSMC)-based MR quarter-vehicle suspension is systematically evaluated through comparing the time and frequency domain responses of the sprung and unsprung mass displacement accelerations, suspension travel and the tire dynamic force with those of the passive quarter-vehicle suspension, under three kinds of varied amplitude harmonic, rounded pulse and real-road measured random excitations. The evaluation results illustrate that the proposed SSMC can greatly suppress the vehicle suspension vibration due to uncertainty of the load, and thus improve the ride comfort and handling safety. The study establishes a solid theoretical foundation as the universal control scheme for the adaptive semi-active control of the MR full-vehicle suspension decoupled into four MR quarter-vehicle sub-suspension systems. 相似文献
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Seiyed Hamid Zareh Atabak Sarrafan Amir Ali Akbar Khayyat Abolghassem Zabihollah 《Journal of Mechanical Science and Technology》2012,26(2):323-334
A novel intelligent semi-active control system for an eleven degrees of freedom passenger car’s suspension system using magnetorheological
(MR) damper with neuro-fuzzy (NF) control strategy to enhance desired suspension performance is proposed. In comparison with
earlier studies, an improvement in problem modeling is made. The proposed method consists of two parts: a fuzzy control strategy
to establish an efficient controller to improve ride comfort and road handling (RCH) and an inverse mapping model to estimate
the force needed for a semi-active damper. The fuzzy logic rules are extracted based on Sugeno inference engine. The inverse
mapping model is based on an artificial neural network and incorporated into the fuzzy controller to enhance RCH. To verify
the performance of the NF controller (NFC), comparisons with existing semi-active techniques are made. The typical control
strategy are linear quadratic regulator (LQR) and linear quadratic Gaussian (LQG) controllers with clipped optimal control
algorithm, while inherent time-delay and non-linear properties of MR damper lie in these strategies. Simulation results demonstrated
that the NFC has better control performance and less control effort than the optimal in improving the service life of the
suspension system and the ride comfort of a car. 相似文献
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以降低城市轨道交通车辆车体的垂向振动、提高乘客舒适度为目的,根据动力吸振器理论及磁流变弹性体刚度可调的特性,设计一种并联安装在车体底部的半主动式磁流变吸振器。为保证磁流变吸振器工作性能稳定,分析磁流变吸振器的磁路结构,利用多元回归分析法拟合励磁电流对磁流变弹性体工作区磁场强度的影响关系,提出励磁电流对磁场强度的控制算法。针对城轨车辆工况变化频繁、车体振动特性复杂的特点,建立对车体宽频振动适应性强的磁流变吸振器系统,研究其对车体垂向减振特性的影响,并利用Sperling指标验证了磁流变吸振器系统的减振能力。结果表明,所设计的磁流变吸振器结构紧凑且安全性高,对车下剩余空间的利用具有合理性;所建立的磁流变吸振器系统振动频带宽,可与车体始终处于谐振状态,使车辆的运行品质时刻保持在优级。论文的工作为利用磁流变弹性体的轨道车辆车体半主动式吸振器的应用提供了参考依据。 相似文献