Velocity &amp; displacement-dependent damper: A novel passive shock absorber inspired by the semi-active control

Nie, Shida; Zhuang, Ye; Wang, Yong; Guo, Konghui

doi:10.1016/j.ymssp.2017.07.008

Cited by 35 publications

(15 citation statements)

References 22 publications

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“…By using the passive protection system the recent development of optimum control of the structural response is found in the article [18]. A novel passive shock absorber called velocity and displacement dependent damper is introduced in the article [19], which is compared for semiactive control damper and the results showed that velocity and displacement dependent damper could perform as good…”

Section: Passive Controlmentioning

confidence: 99%

Review on vibration control in tall buildings: from the perspective of devices and applications

Kavyashree

Patil

Rao

2020

Int. J. Dynam. Control

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Permanent construction has evolved from the Palaeolithic age to today’s skyscrapers. Constructing the structure, which promises occupants safety, has become a concern because of the uncertainties in nature. Therefore in recent years, attention has been given to the development of structural protective devices that could take care of the external loads. Structural control against the wind and earthquake load has been seriously studied where the structure behaves differently for wind and earthquake load has been briefly discussed in this paper. Initially, paper discusses the history of the construction and the passive control system, which was used in structural control, is briefly discussed in this paper. Also, the implementation of active control has been discussed which was introduced later in the structural control for more effective control. But the limitations of the passive and active control system have introduced semi-active control and also the hybrid control strategy. The two mechanisms are put together in the semi-active and hybrid system to obtain all advantages of the algorithm along with overcoming their limitations. The review also briefs about stochastic vibrational control of the structure where randomness is considered in external loads, parameter of the system and also in the external devices which are implemented in the structural control. As construction sector is a complex system, big data analysis, a new field in structural control system is discussed and future scope is also mentioned.

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Section: Passive Controlmentioning

confidence: 99%

Review on vibration control in tall buildings: from the perspective of devices and applications

Kavyashree

Patil

Rao

2020

Int. J. Dynam. Control

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“…Eslaminasab [1], traces the development of neuro-fuzzy controller based on the developed internal solenoid valve semi-active damper, by designing different networks and used the velocity, current, and forces as parameters to evaluate the performance. Nie et al [15], works on velocity and displacement-dependent damper, without any additional hardware or energy consumption, they designed valve and composed of four assemble to realise the semi-active control.…”

Section: Introductionmentioning

confidence: 99%

Adjustable Valve Semi-Active Suspension System for Passenger Car

Ahmed¹,

Yusoff²,

M.³

2019

IJAME

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The suspension of the car plays a very important role in the safety and the comfort of the vehicle and for absorbing the shock waves and give comfort for the driver and passenger. This paper improves the performance of an automobile suspension system by developing electronically adjustable semi-active shock absorber. This achieved by attaching stepper motor for each shock absorber which helps in adjusting the bleed orifice to a certain position that alternates the hydraulic oil flow in the shock absorber between piston’s chamber during the process of compression and rebound. To evaluate the effect of developed semi-active shock absorber on the dynamic behaviour of the vehicle, several tests were carried out on different types of road condition (bumpy, straight-line and roundabout). These tests were used to evaluate the acceleration and ride quality. There is a great range in response when the bleed orifice is opened reached up to 35% between the stiff and soft setting. The value of root means square acceleration (RMS) was calculated and compared with the standard of human exposure to whole-body vibration, which shows an error of 6% slightly. The result shows the effect of electronically controllable shock absorber on a vehicle’s dynamic behaviour — the advantage of electronics to improve the performance of ride comfort and reduced the harms due to undesired vibration.

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“…Many works about the dynamic characteristics of the HDS are focused on the forcedisplacement and force-velocity relations. [6][7][8][9][10] There are a few studies on the dynamic stiffness of the HDS. Kowalski et al 11 studied the dynamic stiffness and damping coefficient of the hydraulic shock absorber under the action of a single sine wave, two different sine waves, and random excitation by experimental methods.…”

Section: Introductionmentioning

confidence: 99%

Research on the dynamic characteristic of semi-active hydraulic damping strut

Wang

Zhang

Chai

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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To reduce the vibration and shock of powertrain in the process of engine key on/off and vehicle in situ shift, a novel semi-active hydraulic damping strut is developed. The purpose of this paper is to study and discuss the dynamic stiffness model of the semi-active hydraulic damping strut. In this study, the dynamic characteristics of semi-active hydraulic damping strut were analyzed based on MTS 831 test rig first. Then, the dynamic stiffness model of semi-active hydraulic damping strut was established based on 2 degrees of freedom vibration system. In this research, a linear, fractional derivative and friction model was used to represent the nonlinear rubber bushing characteristic; the Maxwell model was used to describe the semi-active hydraulic damping strut body model; and the parameters of rubber bushing and semi-active hydraulic damping strut body were identified. The dynamic stiffness values were calculated with solenoid valve energized and not energized at amplitudes of 1 mm and 4 mm, which were consistent with experimental results in low-frequency range. Furthermore, the simplified dynamic stiffness model of the semi-active hydraulic damping strut was discussed, which showed that bushing can be ignored in low-frequency range. Then, the influence of equivalent spring stiffness, damping constant, and rubber bushing stiffness on the stiffness and damping capacity of the semi-active hydraulic damping strut were analyzed. Finally, the prototype of the semi-active hydraulic damping strut was developed and designed based on the vehicle in situ shift and engine key on/off situations, and experiments of the vehicle with and without semi-active hydraulic damping strut were carried out to verify its function.

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Velocity & displacement-dependent damper: A novel passive shock absorber inspired by the semi-active control

Cited by 35 publications

References 22 publications

Review on vibration control in tall buildings: from the perspective of devices and applications

Review on vibration control in tall buildings: from the perspective of devices and applications

Adjustable Valve Semi-Active Suspension System for Passenger Car

Research on the dynamic characteristic of semi-active hydraulic damping strut

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