...T. M. Nguyen; C. Ciocanel; M. H. Elahinia This paper presents a dual-mode magnetorheological (MR) fluid mount. Combining the fluid’s flow and squeeze modes of operation gives this MR mount a unique possibility for varying dynamic stiffness and damping. Details on the design of the internal...

...Hamed Ghaednia; Abdolreza Ohadi Semiactive vibration reduction devices using magnetorheological fluid (MR fluid) have proven to be effective in different engineering applications. MR squeeze film damper (MR-SFD) is one type of such devices that can be used to reduce unwanted vibration in rotary...

...David York; Xiaojie Wang; Faramarz Gordaninejad In this study, the performance of a new controllable mount design utilizing a magnetorheological material encapsulated in an elastomer matrix is investigated. A magnetorheological fluid-elastomer (MRF-E) mount is designed and fabricated, and its...

...F. Yang; E. Esmailzadeh; R. Sedaghati The vibration suppression of structures using a semi-active mass damper is investigated in this study. A magnetorheological (MR)-damper is utilized to design the semi-actively controlled mass damper. The inverse MR-damper model is developed on the basis...

...Weng Wai Chooi; S. Olutunde Oyadiji The focus of this paper is on the experimental validation of a mathematical model that was developed for the flow of magnetorheological (MR) fluids through the annular gap in a MR damper. Unlike previous work by other researchers, which approximate the flow...

...Weng Wai Chooi; S. Olutunde Oyadiji Most magnetorheological (MR) fluid dampers are designed as fixed-pole valve mode devices, where the MR fluid is forced to flow through a magnetically active annular gap. This forced flow generates the damping force, which can be continuously regulated...

...Young-Tai Choi; Norman M. Wereley This study addresses the feasibility and effectiveness of a self-powered magnetorheological (MR) damper using in-situ energy harvested from the vibration and shock environment in which it is deployed. To achieve this, an energy-harvesting device is designed...

...Keun-Joo Kim; Chong-Won Lee; Jeong-Hoi Koo This paper presents a new semi-active control scheme that can reduce the unbalance responses in a flexible rotor system with multiple masses (i.e., disks) using a magnetorheological fluid based squeeze film damper (MR-SFD). The proposed control scheme...

...Min Liu; Vineet Sethi; Gangbing Song; Hui Li The locking force of stay cable vibration control using a magnetorheological (MR) fluid damper is investigated in this paper. For a single mode vibration of a stay cable equipped with a MR damper, the locking force formula is derived and the important...

...Young-Tai Choi; Norman M. Wereley This study addresses the feasibility and applicability of a semiactive magnetorheological (MR) shock isolation system to replace a conventional passive shock isolation system for commercial-off-the-shelf (COTS) equipment. To this end, an analysis of a shock...

... was fabricated by employing magnetorheological elastomers to achieve a stiffness change. For several two-force component excitations, several tuning configurations of the SSA were applied and the kinetic energy of the system was found and optimized. As with the majority of the optimization cases, the experiments...

...N. Sarigul-Klijn; I. Lopez; M. Sarigul-Klijn; D. Karnopp The objective of this paper is to test and model a single-degree-of-freedom vibration isolation system with a magnetorheological (MR) foam damper under harmonic and random excitations. The results of this research are valuable...

...Gregory H. Hitchcock; Xiaojie Wang; Faramarz Gordaninejad This study presents theoretical and experimental investigations of a novel external bypass, fail-safe, magnetorheological fluid (MRF) damper. A fail-safe MRF damper is referred to as a device that retains a minimum required damping capacity...

...Barkan Kavlicoglu; Faramarz Gordaninejad; Cahit Evrensel; Alan Fuchs; George Korol The design, development, and performance characterization of a magnetorheological (MR) fluid clutch for automotive limited slip differential (LSD) applications is presented in this study. The controllability of MR...

...Xubin Song, Ph.D.; Mehdi Ahmadian, Ph.D.; Steve Southward, Ph.D.; Lane R. Miller, Ph.D. In this paper, we will present a nonlinear-model-based adaptive semiactive control algorithm developed for magnetorheological (MR) suspension systems exposed to broadband nonstationary random vibration sources...

... a base-excited semiactive system that includes a heavy-truck seat suspension. An evaluation of the damping force, seat acceleration, and the electrical currents supplied to a magnetorheological damper, which is used for this study, shows that the alternative implementations of skyhook control can...

... for publication in the JOURNAL OF VIBRATION AND ACOUSTICS . Manuscript received Oct. 2000; revised Feb. 2001. Associate Editor: H. S. Tzou. 01 Oct 2000 01 Feb 2001 road vehicles vibration control magnetorheology Historically, heavy trucks have exhibited poor ride quality...