Development of hydraulically driven shaking table for damping experiments on shock absorbers

Wang, Shoukun; Wang, Junzheng; Xie, Wen; Zhao, Jing

doi:10.1016/j.mechatronics.2014.09.001

Cited by 12 publications

(9 citation statements)

References 28 publications

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“…Ignoring the friction force, the ultimate damping force generated by the target damper is expressed as [32]:…”

Section: Analysis For Damping Forcementioning

confidence: 99%

Hybrid model predictive control of damping multi-mode switching damper for vehicle suspensions

Sun¹,

Cai²,

Yuan³

et al. 2017

J. vibroeng.

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This paper investigates the design and verification of a hybrid model predictive controller of a damping multi-mode switching damper for application in vehicle suspensions. Since the damping mode switches induce different modes of operation, the vehicle suspension system including this damper poses challenging hybrid control problem. To solve this problem, a novel approach to the modelling and controller design problem is proposed based on hybrid modelling and model predictive control techniques. The vehicle suspension system with the damping multi-mode switching damper is formulated as a mixed logical dynamical model comprising continuous and discrete system inputs. Based on this model, a constrained optimal control problem is solved to manage the switching sequences of the damping mode with respect to the suspension performance requirements. Numerical simulation results demonstrate the effectiveness of the proposed control methodology finally.

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“…Ignoring the friction force, the ultimate damping force generated by the target damper is expressed as [32]:…”

Section: Analysis For Damping Forcementioning

confidence: 99%

Hybrid model predictive control of damping multi-mode switching damper for vehicle suspensions

Sun¹,

Cai²,

Yuan³

et al. 2017

J. vibroeng.

View full text Add to dashboard Cite

show abstract

“…The force equation resulting from analysing the principles of the electro-hydraulic exciter is (8) and (9) give the piston response to the valve orifice area input, which are two different cases depending on whether the piston is moving to the right or the left. The equations are quite general and are applicable to the system where the spring force is dominant.…”

Section: Basic Equations Of the Excitermentioning

confidence: 99%

“…into Eqs (8). and(9) and then integrating them, the displacement of vibration can be derived as (the analytical solution is given in Appendix B…”

mentioning

confidence: 99%

Theoretical and experimental investigations of vibration waveforms excited by an electro-hydraulic type exciter for fatigue with a two-dimensional rotary valve

Ren

Ruan

2016

Mechatronics

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Conventional electro-hydraulic excitation is usually controlled by a servo valve employing a sliding spool type construction. However, the comparatively slow response of the servo valve will greatly limit the system's high-frequency performance. Therefore, a rotary valve with the rotary motion of the spool as a new excitation mechanism is proposed to obtain the desired excitation, especially a high-frequency excitation wave for fatigue. An electro-hydraulic exciter using a combination of a three-way two-dimensional rotary valve (2D rotary valve) and an unequal area piston is taken as an example. Analysis of the vibration output to a typical wave input yields an analytic solution of the vibration waveform excited by this electro-hydraulic system. The mathematical formulation of the harmonics is also derived. Additionally, an electro-hydraulic excitation test-bed is built to acquire an experimental excitation wave. Consequently, the analysis of the excitation waveform in an approximate analytical and experimental method is used to verify access to high-frequency excitation, even resonance excitation.

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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.

show abstract

Development of hydraulically driven shaking table for damping experiments on shock absorbers

Cited by 12 publications

References 28 publications

Hybrid model predictive control of damping multi-mode switching damper for vehicle suspensions

Hybrid model predictive control of damping multi-mode switching damper for vehicle suspensions

Theoretical and experimental investigations of vibration waveforms excited by an electro-hydraulic type exciter for fatigue with a two-dimensional rotary valve

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

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