Adaptive Snubber-Type Magnetorheological Fluid-Elastomeric Helicopter Lag Damper

Ngatu, Grum T.; Hu, Wei; Wereley, Norman M.; Kothera, Curt S.

doi:10.2514/1.43356

Cited by 14 publications

(9 citation statements)

References 40 publications

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“…In this case, MR fluid-elastomers (MRFEs) are used in a variety of devices such as helicopter lag dampers, MRFE mounts, and MRFE isolators. Despite all mentioned facts, MR fluids have a widespread use in mitigating vibration and controlling devices and have more effective output force than MREs (Hu and Wereley, 2005;Kallio, 2005;Ngatu et al, 2010Ngatu et al, , 2012York et al, 2007). MR fluids have been used in damping devices (Yang et al, 2002), particularly dampers in bridges (Gordaninejad et al, 1998) and suspension systems (Raja et al, 2010), rotary actuators (Guo and Liao, 2012), clutches (Kavlicoglu et al, 2002), MR seat suspension system (Bai and Wereley, 2014), and brakes (Vavreck and Ho, 2005).…”

Section: Introductionmentioning

confidence: 99%

A new approach for modeling of magnetorheological elastomers

Norouzi

Alehashem

Vatandoost

et al. 2015

Journal of Intelligent Material Systems and Structures

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This article presents a novel model to portray the behavior of magnetorheological elastomer in oscillatory shear test. The dynamic behavior of an isotropic magnetorheological elastomer is experimentally investigated at different input conditions. A modified Kelvin–Voigt viscoelastic model is developed to describe relationships between shear stress and shear strain of magnetorheological elastomers based on input frequency, shear strain, and magnetic flux density. Unlike the previous models of magnetorheological elastomers, the coefficients of this model, calculated by nonlinear regression method, are constant at various harmonic shear loads and different magnetic flux densities. The results show that the new phenomenological model can effectively predict the viscoelastic behavior of magnetorheological elastomers. Also, the results demonstrate that the trend of shear storage modulus of magnetorheological elastomer based on the frequency is nonlinear from 0.1 to 8 Hz, which is predicted by the present model. The proposed model is beneficial to simulate vibration control strategies in magnetorheological elastomer base devices under harmonic shear loadings.

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Section: Introductionmentioning

confidence: 99%

A new approach for modeling of magnetorheological elastomers

Norouzi

Alehashem

Vatandoost

et al. 2015

Journal of Intelligent Material Systems and Structures

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“…There into, a novel hybrid MRF-elastomeric (MRFE) lag damper (Figure 43), which consists of a double lap shear elastomeric damper in parallel with two MR flow-mode dampers, is investigated for helicopter stability augmentation control (Hu and Wereley, 2008). A snubber-type MRFE lag damper, which consists of a flow valve, a flexible snubber body, and a flexible center wall separating the body into two fluid chambers, is developed for a hingeless helicopter rotor (Ngatu et al, 2010).…”

Section: Gordaninejad (2003)mentioning

confidence: 99%

Magnetorheological fluid dampers: A review on structure design and analysis

Zhu

Jing

2012

Journal of Intelligent Material Systems and Structures

339

218

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Magnetorheological fluid technology has gained significant development during the past decades. The application of magnetorheological fluids has grown rapidly in civil engineering, safety engineering, transportation, and life science with the development of magnetorheological fluid–based devices, especially magnetorheological fluid dampers. The magnetorheological fluid dampers could offer an outstanding capability in semiactive vibration control due to excellent dynamical features such as fast response, environmentally robust characteristics, large force capacity, low power consumption, and simple interfaces between electronic input and mechanical output. To address the fast growing demand on magnetorheological fluid damping technology in extensive engineering practices, the state-of-the-art development is presented in this article, which provides a comprehensive review on the structure design and its analysis of magnetorheological fluid dampers (or systems). This can be regarded as a useful complement to several existing reviews in the recent literature on magnetorheological fluids technology, magnetorheological fluid applications, modeling of magnetorheological fluids and dampers, control strategies of magnetorheological fluid systems, and so on. The review begins with an introduction of the basic features and relevant applications of magnetorheological fluids. Then several basic structure design issues of magnetorheological fluid dampers are introduced. Following this, typical magnetorheological dampers are discussed according to the arrangement configurations of magnetorheological fluid cylinders and magnetorheological fluid control valves. Furthermore, reinforced structure designs of magnetorheological fluid dampers are provided, which focus on coil configuration, fluid resistance channel design, and electromagnetic design. Thereafter, design issues of magnetorheological fluid damper systems are discussed, which involves sensor-based magnetorheological fluid damper systems, self-powered magnetorheological fluid damper systems, fail-safe magnetorheological fluid damper systems, and integrated spring magnetorheological fluid damper systems. Importantly, to have a systematic quantitative viewpoint of the analysis and design of magnetorheological fluid dampers, the review ends with a summary of performance analysis issues, including performance specification, analytical modeling, parameter optimization, and so on.

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“…In fact MR dampers are highly non-linear, and are typically modelled using hysteretic models such as the Bouc-Wen and Dahl models [30,60]. MR dampers have been successfully used for applications such as seat and vehicle suspensions [61][62][63][64], helicopter dampers [65,66], buildings, and other large structures [67][68][69][70][71][72]. They have also been used to control non-linear structural systems [73,74] As a technical example, an MR damper is shown in Fig.…”

Section: Semi-active Controlmentioning

confidence: 99%

A review of non-linear structural control techniques

Wagg

Neild

2011

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this articles the authors present a review of non-linear structural control techniques. This is an area of growing importance in a range of engineering applications, where non-linear behaviour is encountered. Structural control is usually divided into three main areas: (a) passive (b) semi-active, and (c) active control. This article follows this convention, and highlights in each section the relevant state of the art for non-linear systems, with additional references to related linear approaches.

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Adaptive Snubber-Type Magnetorheological Fluid-Elastomeric Helicopter Lag Damper

Cited by 14 publications

References 40 publications

A new approach for modeling of magnetorheological elastomers

A new approach for modeling of magnetorheological elastomers

Magnetorheological fluid dampers: A review on structure design and analysis

A review of non-linear structural control techniques

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