Development of a novel variable stiffness and damping magnetorheological fluid damper

et al. 2019

IEEE Trans. Ind. Inf.

Self Cite

As the concept of variable stiffness (VS) and variable damping (VD) has increasingly drawn attention because of its superiority on reducing unwanted vibrations, dampers with property of varying stiffness and damping have been an attractive method to further improve vehicle performance and driver comfort. This paper presents the design, prototyping, modeling, and experimental evaluation of a VS and VD magnetorheological (MR) vehicle suspension system. It was first characterized by an INSTRON machine. Then, a phenomenological model was proposed to capture the characteristics of the damper and TS fuzzy approach was used to model the quarter car system where the proposed damper was installed. Different controllers, including skyhook, short-time Fourier transform and state observer based controller were designed to control the damper. Experimental results demonstrate that the quarter car system with the VS and VD suspension performs best in terms of reducing the sprung mass accelerations comparing with other suspensions. Abstract-As the concept of variable stiffness and damping has drawn increasingly attention because of its superiority on reducing unwanted vibrations, dampers with property of varying stiffness and damping have been an attractive method to further improve vehicle performance and driver comfort. This paper presents the design, prototyping, modelling and experimental evaluation of a variable stiffness and variable damping (VSVD) magnetorheological (MR) vehicle suspension system. It was firstlycharacterized by an INSTRON machine. Then a phenomenological model was proposed to capture the characteristics of the damper and TS fuzzy approach was used to model the quarter car system where the proposed damper was installed. Different controllers, including skyhook, Short-time Fourier transform (STFT) and state observer based controller were designed to control the damper. Experimental results demonstrate that the quarter car system with the variable stiffness and damping suspension performs best in terms of reducing the sprung mass accelerations comparing with other suspensions. Index Terms-variable stiffness and damping; magnetorheological; vehicle suspension; vibration control Shuaishuai Sun received the B.E. degree in mechanical engineering and automation from the

Section: Introductionmentioning

confidence: 99%

A New Generation of Magnetorheological Vehicle Suspension System With Tunable Stiffness and Damping Characteristics

Sun

Tang

et al. 2019

IEEE Trans. Ind. Inf.

Self Cite

“…The stiffness and damping of the MRE layers under different currents can be identified according to its experimentally obtained frequency shift performance in Fig. 4 by using the least-square method in combination with the trustregion-reflective algorithm available in MATLAB (R2013b) [23]. The identification results are illustrated in Table 3.These parameters will be used to evaluate the performance of the MRE rail damper on railway vibration and noise reduction in the following section.…”

Section: Stiffness Identification Of the Mre Layers Under Different Cmentioning

confidence: 99%

A magnetorheological elastomer rail damper for wideband attenuation of rail noise and vibration

Sun

Journal of Intelligent Material Systems and Structures

Yildirim

et al. 2019

Self Cite

The noise and vibration effects of rails can have a significant impact on the environment surrounding the railways. Rail dampers are elements that are attached to the sides of the rail and can improve the track decay rate of rail and then enhance the rails’ ability to attenuate noises and vibrations. However, in practical applications, the most efficient rail damper design still cannot adjust its own parameters to adapt to different requirements because their stiffness and damping are fixed after designed. In this work, a tunable magnetorheological elastomer rail damper that works on the principle of a dynamic vibration absorber has been designed, analysed, characterised, and experimentally tested for the suppression of railway noise and vibration. The new rail damper incorporates variable stiffness magnetorheological elastomer layers, whose stiffness can be controlled by an externally applied magnetic field, to realise adaptive characteristics. Experimental characterisations of the magnetorheological elastomer rail damper were performed with an electromagnetic shaker. Subsequently, theoretical predictions of the track decay rate of a UIC-60 rail with different rail dampers and without rail damper were conducted; simulation results verified that magnetorheological elastomer rail dampers can improve the track decay rate of rail over a wider frequency range compared to conventional rail dampers and thus the performance of the magnetorheological elastomer rail damper outperforms other conventional rail dampers on rail noise reduction.

“…In active control systems, errors cause unwanted forces acting on the car body or/and bogie frames, which may cause a series of disastrous consequences [5,6]. Unlike active control, semiactive control adjusts only the damping coefficient of dampers to adapt to the new need.…”

Section: Challenges Associated With High-speed Railway Vehiclementioning

confidence: 99%

Semiactive Control of High‐Speed Railway Vehicle Suspension Systems with Magnetorheological Dampers

Liao

Liu

2019

Shock and Vibration

Using the magnetorheological (MR) damper model, this paper derives a semiactive suspension model for a high-speed railway vehicle, and a new evaluating method is proposed to analyze the effect of two kinds of time delay existing in control systems on vehicle dynamic performance. The railway vehicle is modeled by a 50 degree-of-freedom (DOF) system which considers the full 6 DOF of each wheelset, bogie, car body, and the pitch angle of each axle box. Several control strategies, sky-hook (SH), acceleration-driven damping (ADD), and mixed SH-ADD, are considered in the semiactive suspension system. To evaluate the effect of these semiactive controls and the different kinds of time delay on the lateral ride index of a high-speed railway vehicle, a 3D surface in a rectangular coordinate system is described. The cross curve between the 3D surface and a horizontal plane which represents the performance of passive suspension is projected on the X-Y plane, and the area enclosed by the contour line, X-axis, and Y-axis can be used to evaluate the performance of semiactive controls. The results show that the new method is convenient to evaluate the performance of semiactive control strategies visually when there is more than one kind of time delay.