Application of a magnetorheological damper modeled using the current–dependent Bouc–Wen model for shimmy suppression in a torsional nose landing gear with and without freeplay

Atabay, Elmas; Özkol, İbrahim

doi:10.1177/1077546312468925

Cited by 45 publications

(29 citation statements)

References 45 publications

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“…Numerous studies have identified the critical features of the MR damper, such as the controllable dynamic range of damping force, rapid adjustment response, and low energy consumption [1][2][3][4]. The initial implementation of the MR damper was in the automotive industry [5][6][7]; more recently, it has penetrated other sectors, including aerospace [8,9], marine structure [10], military [11,12], biomedical devices [13,14], home appliances [15], railway [16][17][18], and civil engineering [19][20][21]. The fundamental principle of the MR damper is similar to that of the conventional passive damper, which dissipates kinetic energy as heat through the flow restriction mechanism.…”

Section: Introductionmentioning

confidence: 99%

A Concentric Design of a Bypass Magnetorheological Fluid Damper with a Serpentine Flux Valve

Idris¹,

Imaduddin

Ubaidillah

et al. 2020

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This work presents a new concentric design structure of a bypass magnetorheological (MR) damper with a serpentine flux valve type. In this design, the serpentine valve is installed not in the middle of the piston but on the bypass channel of the damper. However, to make it less bulky, the location of the valve installation is chosen to be in line with the cylinder axis, which is different from the common configuration of the bypass damper. With the proposed design concept, the performance flexibility of the bypass configuration and the compactness of the piston valve configuration can be accomplished. In this study, these benefits were demonstrated by firstly deriving an analytical model of the proposed MR damper focusing on the bypass concentric valve structure, which is vital in determining the damping force characteristics. The prototype of MR damper was also fabricated and characterized using the dynamic test machine. The simulation results show that the damping force could be adjusted from 20 N in the off-state to around 600 N in the on-state with 0.3 A of excitation current. In the experiments, during low piston velocity measurement, the on-state results from the simulation were generally in good agreement with the experimental results. However, with the increase in piston velocity, the deviation between the simulation and the experiment gets higher. The deviations are most probably due to seal frictions that were not accounted for in the model. The seal friction is probably dominant as the seals in the prototype need to be prepared for handling higher fluid pressure. As a result, the frictions are quite prevalent and significantly affect the measured off-state damping forces as well, where it was recorded ten times higher than the predicted values from the model. Nevertheless, although there were deviations, the dynamic range of the concentric bypass structure is still 1.5 times higher than the conventional structure and the new structure can be potentially explored more to achieve an improved MR damper design.

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Section: Introductionmentioning

confidence: 99%

A Concentric Design of a Bypass Magnetorheological Fluid Damper with a Serpentine Flux Valve

Idris¹,

Imaduddin

Ubaidillah

et al. 2020

Actuators

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“…A study by Boeing (Gordon, 2002) employs a similar model but adds rotational freeplay and a fixed Coulomb torque. Atabay and Ozkol (2013) reused Somieski’s model and incorporated a magnetorheological damper for shimmy suppression. A fifth-order model by Thota et al.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the effect of coulomb friction on nose landing gear shimmy

Rahmani

Behdinan

2018

Journal of Vibration and Control

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Landing gear shimmy remains a challenge in aircraft design despite abundant advances in aircraft engineering in the past few decades. Accurate shimmy prediction is closely tied to availability of dynamic models with all relevant types of motions and key nonlinear elements, a matter which has been accomplished in the present study through including rotational, lateral, longitudinal, and axial degrees of freedom and tire, shock absorber, and Coulomb friction nonlinearities. Using multi-body dynamic simulations, stability of the nose landing gear is studied as a function of key system parameters. Influences of nonlinearities are investigated in isolation, with a more in-depth look at the Coulomb friction effect, which is modeled as a function of the shock absorber stroke rate and rotational shimmy speed. It is found that Coulomb friction is a key factor in determining the onset and type of shimmy. The effect of friction parameters is then studied using nonlinear sensitivity analyses, and witnessed trends are utilized to draw design recommendations.

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“…The control of linear and nonlinear systems equipped with semiactive devices is interesting subject that can be studied both experimentally and theoretically. [1][2][3][4][5][6][7][8][9][10] In particular, semiactive systems have the reliability of passive systems and consume less energy than active systems. Several systems are used to reduce undesired vibrations that are emitted from buildings.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of semiactive robust control for structures with magnetorheological dampers

AGGÜMÜŞ

Çetin

2018

Journal of Low Frequency Noise, Vibration and Active Control

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This study investigates reducing the vibration of structures under different earthquakes using magnetorheological dampers. To investigate the effect of the magnetorheological damper arrangement on reducing the vibration amplitude of structures, experimental studies are conducted in which magnetorheological dampers are commanded by a robust controller. So, the performance of the system is investigated using different combinations of two magnetorheological dampers on a building and three different arrangements for dampers are considered for experimental study. Additionally, an H 1 controller is designed to determine the voltage transmitted to the magnetorheological dampers. The results show that the magnetorheological damper commanded with the robust controller effectively reduces the vibration of a sixstory steel structure. Furthermore, the magnetorheological damper arrangement in which the one end is connected to the ground reduces the vibration amplitudes.

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Application of a magnetorheological damper modeled using the current–dependent Bouc–Wen model for shimmy suppression in a torsional nose landing gear with and without freeplay

Cited by 45 publications

References 45 publications

A Concentric Design of a Bypass Magnetorheological Fluid Damper with a Serpentine Flux Valve

A Concentric Design of a Bypass Magnetorheological Fluid Damper with a Serpentine Flux Valve

Investigation on the effect of coulomb friction on nose landing gear shimmy

Experimental investigation of semiactive robust control for structures with magnetorheological dampers

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