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| 1 | Skyhook-based Semi-active Control of Full-vehicle Suspension with Magneto-rheological Dampers显示文摘The control study of vehicle semi-active suspension with magneto-rheological (MR) dampers has been attracted much attention internationally. However, a simple, real time and easy implementing semi-active controller has not been proposed for the MR full-vehicle suspension system, and a systematic analysis method has not been established for evaluating the multi-objective suspension performances of MR full-vehicle vertical, pitch and roll motions. For this purpose, according to the 7-degree of freedom (DOF) fullvehicle dynamic system, a generalized 7-DOF MR and passive full-vehicle dynamic model is set up by employing the modified Boucwen hysteretic force-velocity (F-v) model of the MR damper. A semi-active controller is synthesized to realize independent control of the four MR quarter-vehicle sub-suspension systems in the full-vehicle, which is on the basis of the proposed modified skyhook damping scheme of MR quarter-vehicle sub-suspension system. The proposed controller can greatly simplify the controller design complexity of MR full-vehicle suspension and has merits of easy implementation in real application, wherein only absolute velocities of sprung and unsprung masses with reference to the road surface are required to measure in real time when the vehicle is moving. Furthermore, a systematic analysis method is established for evaluating the vertical, pitch and roll motion properties of both MR and passive full-vehicle suspensions in a more realistic road excitation manner, in which the harmonic, rounded pulse and real road measured random signals with delay time are employed as different road excitations inserted on the front and rear two wheels, by considering the distance between front and rear wheels in full-vehicle. The above excitations with different amplitudes are further employed as the road excitations inserted on left and right two wheels for evaluating the roll motion property. The multi-objective suspension performances of ride comfort and handling safety of the proposed MR full-vehicle suspension are thus thoroughly evaluated by comparing with those of the passive full-vehicle suspension. The results show that the proposed controller can ideally improve multiobjective suspension performances of the ride comfort and handling safety. The proposed harmonic, rounded pulse and real road measured random signals with delay time and asymmetric amplitudes are suitable for accurately analyzing the vertical, pitch and roll motion properties of MR full-vehicle suspension system in a more realistic road excitation manner. This research has important theoretical significance for improving application study on the intelligent MR semi-active suspension. | ZHANG Hailong WANG Enrong MIN Fuhong SUBASH Rakheja SU Chunyi | 2013 | Chinese Journal of Mechanical Engineering2013，26，3： | 11 |
| 2 | 磁流变悬架系统的非线性动力学分析与混沌控制显示文摘基于修正的磁流变阻尼器Bouc-Wen力-速度(F-v)模型,建立了磁流变悬架动力学系统。根据非线性系统稳定性理论发现了系统发生混沌的可能性。给出全局分岔图和Lyapunov指数谱图,得到了系统随参数变化呈现出的周期振动、概周期振动和混沌运动交替出现的复杂非线性动力学行为,以及经由倍周期分岔、鞍结分岔以及逆向倍周期分岔通向混沌的演化过程。以理想线性模型为参考,提出了基于运动状态追踪的滑模控制方法,有效地将系统混沌运动镇定到稳定的周期状态。 | 刘剑 王恩荣 颜伟 张海龙 | 2019 | 振动与冲击2019，38，13： | 7 |
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