Vibration Control by a Variable Damping and Stiffness System with Magnetorheological Dampers

Liu, Yanqing; Matsuhisa, Hiroshi; Utsuno, Hideo; Park, Jeong Gyu

doi:10.1299/jsmec.49.411

Cited by 20 publications

(27 citation statements)

References 6 publications

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“…The spring force is developed by compressing the MRF hydrostatically due to varying shaft volume. Liu et al 71 proposed a variable damping and stiffness system using two MRFDs and two springs. By controlling the damping of the MRFD, the total stiffness of this system can be varied in step less.…”

Section: Mrfd Integrated With Air Springmentioning

confidence: 99%

Developments in Vibration Control of Structures and Structural Components with Magnetorheological Fluids

Raju¹,

Varma²

2017

Current Science

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Vibration isolation and control of structures subjected to different types of dynamic loads due to periodic forces, impact and shock type forces and earthquake forces is an important area in structural engineering. The structures can be machine foundations, buildings, bridges, towers, automobiles, ship structures, military tanks and aeronautical structures. Some of these devices used are elastic springs, viscoelastic dampers, viscous fluid dampers, magnetorheological dampers and friction dampers. This article gives latest developments in vibration control of structures and structural components using magnetorheological fluids. The current status of technology and further research requirements to be studied in these areas are highlighted.Keywords: Automobile brakes, magnetorheological fluids, structure and structural components, suspension systems, vibration control.IMPROVEMENT in manufacturing technology has provided machines of higher ratings, longer bridges, taller buildings which requires to satisfy the static, dynamic capacity and serviceability and stability limits for members/ systems prescribed by codes of practice. These machines/ structures give rise to considerable higher dynamic forces and thereby higher stresses. This demands development of advanced control and safety systems to keep the structural members/systems static and dynamic responses within tolerable levels. The performance, safety and stability of structures supporting the machines/structures depend largely on their design of suspension systems and their interaction with the environment. In this article, current status of technology in development of magnetorheological and friction dampers and their use in vibration control of structural and structural components in different fields of engineering applications are presented.

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Section: Mrfd Integrated With Air Springmentioning

confidence: 99%

Developments in Vibration Control of Structures and Structural Components with Magnetorheological Fluids

Raju¹,

Varma²

2017

Current Science

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“…In the experiment, E 1 = 1.0 V and E 2 = 1.5 V and the applied currents in the on-state of MR damper 1 and 2 are 0.19 A and 0.40 A (7) , respectively. When the dampers are in the off-state, the applied current is zero.…”

Section: Control Algorithm and Parameter Values In Experiments And Calmentioning

confidence: 99%

“…According to the experimental data (7) , the values of the parameters in Eqs. (9) and (10) are estimated as shown in Table 1.…”

Section: Control Algorithm and Parameter Values In Experiments And Calmentioning

confidence: 99%

Variable Damping and Stiffness Vibration Control with Magnetorheological Fluid Dampers for Two Degree-of-Freedom System

Liu

Matsuhisa

Utsuno

et al. 2006

JSME Int. J., Ser. C

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Vibration isolation methods that vary damping and stiffness have demonstrated excellent authority over system vibration, thus, potentially making them attractive for many applications. However, conventional devices for controlling variable stiffness are typically complicated and difficult to implement in most applications. To address this issue a new method is proposed that requires two magnetorheological (MR) fluid dampers placed in series. With this configuration, variable damping and stiffness vibration control is simultaneous achieved by varying a small electric current to the MR dampers. This paper presents a theoretical and experimental analysis of a two degree-of-freedom system that is controlled by the MR dampers. Five different control schemes involving combinations of variable damping and variable stiffness are explored. The time and frequency responses of the two degree-of-freedom system to a random input show that combined variable damping and stiffness control provides the best vibration isolation over a frequency range spanning the system's two structural vibration modes. The experimental results agree well with the theoretical analysis.

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“…Duan et al implemented a total of 312 MR dampers (Lord Corporation) in a bridge for control of rain-wind-induced cable vibrations [13]. Recently, a few groups made use of MR dampers [14,15] to develop variable damping and stiffness systems, as such systems showed significant improvements in vibration reduction application. Hong et al [14] did a nice job on the development of a liquid spring shock absorber with controllable MR damping through a bypass comprising tubing and an MR valve.…”

Section: Introductionmentioning

confidence: 99%

“…The spring force is developed by compressing the MR fluid hydrostatically due to varying shaft volume. Liu et al proposed a variable damping and stiffness system using two MR dampers and two springs [15]. By controlling the damping of the MR damper, the total stiffness of this system can be varied in stepless.…”

Section: Introductionmentioning

confidence: 99%

A variable stiffness MR damper for vibration suppression

Zhang

Zhou

2009

2009 IEEE/ASME International Conference on Advanced Intelligent Mechatronics

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Abstract-This paper presents the development of a magnetorheological (MR) fluid-based variable stiffness damper and analysis its applications in vibration suppression. The MR fluid isolator used a MR valve control unit and bladders to achieve the variable stiffness and damping in stepless and relative large scope. A mathematical model of the isolator was derived, a prototype of the MR fluid isolator was fabricated and its dynamic behavior was measured in vibration under various applied magnetic fields. The effective stiffness and damping coefficients of the isolator under various magnetic fields were identified and the dynamic performances of isolator were evaluated with simulation. The results demonstrated that the developed MR bladder system can efficiently suppress the structural vibrations.

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Vibration Control by a Variable Damping and Stiffness System with Magnetorheological Dampers

Cited by 20 publications

References 6 publications

Developments in Vibration Control of Structures and Structural Components with Magnetorheological Fluids

Developments in Vibration Control of Structures and Structural Components with Magnetorheological Fluids

Variable Damping and Stiffness Vibration Control with Magnetorheological Fluid Dampers for Two Degree-of-Freedom System

A variable stiffness MR damper for vibration suppression

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