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Influence of flexible foundation on the dynamic characteristics of an active suspension system generating high stiffness

Influence of flexible foundation on the dynamic characteristics of an active suspension system generating high stiffness
Influence of flexible foundation on the dynamic characteristics of an active suspension system generating high stiffness
A vibration isolation system using zero-power magnetic suspension can provide an infinite supporting stiffness against static direct disturbance by a series connection of a normal mechanical spring with an active magnetic suspension system of negative stiffness. An extension of this idea to a more generalized model to produce infinite /zero dynamic modules including stiffness, mass and damping has been presented. However, these reported researches are based on an assumption of rigid supporting foundation. In practical engineering systems, any supporting foundations are essentially elastic. This paper intends to investigate the effect of elastic foundations on dynamic characteristics of this kind of active suspension systems. The generalised mathematical model of an active suspension system on a simply supported elastic plate is developed to explore the mechanism of the problem. The governing equations describing the coupled system are derived and the comprehensive dynamical characteristics of the overall system are analysed. The mobility characteristics of the
flexible plate and its effect on the dynamic stiffness or modulus of the supporting system are presented using frequency response curves. The results of this system with a flexible foundation are compared with the case of rigid base. An equivalent stiffness is chosen to adjust the active feedback parameters to reduce the effect of the flexible foundation on the supporting characteristics of the system. It is demonstrated that the proposed approach is effective. The theoretical study presented in this paper may be applied to design suspension systems or hybrid vibration control systems with increased control performance and practical applicability.
233-240
International Institute of Acoustics and Vibration (IIAV)
Xiong, Y.P.
51be8714-186e-4d2f-8e03-f44c428a4a49
Xing, J.T.
d4fe7ae0-2668-422a-8d89-9e66527835ce
Price, W.G.
b7888f47-e3fc-46f4-9fb9-7839052ff17c
Xiong, Y.P.
51be8714-186e-4d2f-8e03-f44c428a4a49
Xing, J.T.
d4fe7ae0-2668-422a-8d89-9e66527835ce
Price, W.G.
b7888f47-e3fc-46f4-9fb9-7839052ff17c

Xiong, Y.P., Xing, J.T. and Price, W.G. (2004) Influence of flexible foundation on the dynamic characteristics of an active suspension system generating high stiffness. In Proceedings of the Eleventh International Congress on Sound and Vibration, St. Petersburg, Russian, 5-8 July 2004. International Institute of Acoustics and Vibration (IIAV). pp. 233-240 .

Record type: Conference or Workshop Item (Paper)

Abstract

A vibration isolation system using zero-power magnetic suspension can provide an infinite supporting stiffness against static direct disturbance by a series connection of a normal mechanical spring with an active magnetic suspension system of negative stiffness. An extension of this idea to a more generalized model to produce infinite /zero dynamic modules including stiffness, mass and damping has been presented. However, these reported researches are based on an assumption of rigid supporting foundation. In practical engineering systems, any supporting foundations are essentially elastic. This paper intends to investigate the effect of elastic foundations on dynamic characteristics of this kind of active suspension systems. The generalised mathematical model of an active suspension system on a simply supported elastic plate is developed to explore the mechanism of the problem. The governing equations describing the coupled system are derived and the comprehensive dynamical characteristics of the overall system are analysed. The mobility characteristics of the
flexible plate and its effect on the dynamic stiffness or modulus of the supporting system are presented using frequency response curves. The results of this system with a flexible foundation are compared with the case of rigid base. An equivalent stiffness is chosen to adjust the active feedback parameters to reduce the effect of the flexible foundation on the supporting characteristics of the system. It is demonstrated that the proposed approach is effective. The theoretical study presented in this paper may be applied to design suspension systems or hybrid vibration control systems with increased control performance and practical applicability.

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Published date: July 2004
Additional Information: CD-ROM

Identifiers

Local EPrints ID: 22712
URI: http://eprints.soton.ac.uk/id/eprint/22712
PURE UUID: 0329b29b-09f9-4a13-ad5f-15fa20555e8f
ORCID for Y.P. Xiong: ORCID iD orcid.org/0000-0002-0135-8464

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Date deposited: 04 Apr 2006
Last modified: 12 Dec 2021 03:12

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