Design and verification of a seat suspension with variable stiffness and damping

Traditional MR seat suspension without stiffness control is not able to avoid the resonance between the excitation and the seat, though it can dampen the vibration energy. To solve this problem, this paper proposed a variable stiffness (VS) magnetorheological (MR) damper to implement an advanced seat suspension. Its natural frequency can be shifted away from the excitation frequency through the variations of stiffness, thereby realizing the non-resonance control. The new seat suspension is designed and prototyped first, and then its dynamic property under different energizing current, excitation amplitude, and excitation frequency was tested using an MTS machine. The testing results verified its stiffness controllability. The vibration attenuation performance of the seat suspension was also evaluated on a vibration shaking table. The vibration reduction performance of the seat suspension was evaluated under two kinds of excitations, i.e., harmonic excitation and random excitation; the experimental results indicate that the new seat suspension outperforms passive seat suspensions regarding their ride comfort.

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Theoretical and experimental research on a new system of semi-active structural control with variable stiffness and damping

Earthquake Engineering and Engineering Vibration ◽

10.1007/s11803-002-0016-y ◽

2002 ◽

Vol 1 (1) ◽

pp. 130-135 ◽

Cited By ~ 10

Author(s):

Fulin Zhou ◽

Ping Tan ◽

Weiming Yan ◽

Lushun Wei

Keyword(s):

Experimental Research ◽

Structural Control ◽

Variable Stiffness ◽

Active Structural Control ◽

Stiffness And Damping ◽

New System

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Resonance suppression through variable stiffness and damping mechanisms

10.1117/12.348688 ◽

1999 ◽

Cited By ~ 2

Author(s):

Henri P. Gavin ◽

Nitin S. Doke

Keyword(s):

Variable Stiffness ◽

Stiffness And Damping

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Influence of Spring Ratio on Variable Stiffness and Damping Suspension System Performance

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.836.31 ◽

2016 ◽

Vol 836 ◽

pp. 31-36 ◽

Cited By ~ 2

Author(s):

Unggul Wasiwitono ◽

Agus Sigit Pramono ◽

I. Nyoman Sutantra ◽

Yunarko Triwinarno

Keyword(s):

Mr Damper ◽

Variable Stiffness ◽

Nonlinear Damping ◽

Suspension System ◽

Force Characteristic ◽

Damping Force ◽

The Road ◽

Power Spectral ◽

Road Disturbance ◽

Stiffness And Damping

The variable stiffness and damping (VSVD) suspension system offers an interesting option to improve driver comfort in an energy efficient way. The aim of this study is to analyze the influence of the spring ratio on the VSVD. The realization of the VSVD is obtained by the application of variable damping with magnetorheological (MR) damper. In this study, the nonlinear damping force characteristic of the MR damper is modeled with the Bouc-Wen model and the road disturbance is modeled by a stationary random process with road displacement power spectral density. It is shown from simulation that VSVD has a potential benefit in improving performance of vehicle suspension.

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