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Quasi-active approach to vibration isolation using magnetic springs.

Trimboli, M.S. and Wimmel, R. and Breitbach, E. (1) (1994) Quasi-active approach to vibration isolation using magnetic springs. SPIE - The International Society for Optimal Engineering.. 1994 North American Conference on Smart Structures and Materials, 14-16 February 1994, Orlando, Florida, USA. Proc. Smart Structures and Materials 1994 Passive Damping..

Full text not available from this repository.

Abstract

This paper presents a novel concept for the isolation of vibrations using magnetically adjusted springs in conjunction with a feedback regulation system. Recently patented magnetic springs are incorporated into the design of a vibration isolation system intended for use in a wide variety of industrial and civil applications. At the heart of the system proposed in this paper is a nonlinear magnetic spring component, the constitutive properties of which enable it to passively achieve negative stiffness over a limited region of displacement. When mounted in parallel with a conventional, linear spring, the result is a nonlinear spring with a nearly flat constitutive curve for a certain displacement range. Within this range, therefore, the spring behaves as though it were extremely soft, thereby passively affording the desireable isolation characteristics associated with a soft spring, only without the inherent physical disadvantages. A simple feedback regulator is necessary in order to insure that the system operates within its linear range. The paper presents first some background to the problem of vibration isolation and then discusses the fundamental design and operation of the magnetic springs. Next, we propose a simple PI controller for operating-point regulation and maintenance of linear operation. Following an analysis of predicted spring performance, we then present a numerical simulation of the entire system and compare this result to that obtained from experiments performed with a laboratory prototype.

Item URL in elib:https://elib.dlr.de/39643/
Document Type:Conference or Workshop Item (Paper)
Additional Information: institution=Passive Damping, Conor D. Johnson, CSA Engineering, Inc., LIDO-Berichtsjahr=1994, pages=11,
Title:Quasi-active approach to vibration isolation using magnetic springs.
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Trimboli, M.S.UNSPECIFIEDUNSPECIFIED
Wimmel, R.UNSPECIFIEDUNSPECIFIED
Breitbach, E. (1)UNSPECIFIEDUNSPECIFIED
Date:1994
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Vol. 2193
Page Range:pp. 73-83
Publisher:SPIE - The International Society for Optimal Engineering.
Series Name:Passive Damping
Status:Published
Keywords:Vibration isolation, magnetic mechanical spring, feedback control, simulation, experiments, isolation of intensive care units, very low spring stiffness.
Event Title:1994 North American Conference on Smart Structures and Materials, 14-16 February 1994, Orlando, Florida, USA. Proc. Smart Structures and Materials 1994 Passive Damping.
HGF - Research field:UNSPECIFIED
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:UNSPECIFIED
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):UNSPECIFIED
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: DLR-Beauftragter, elib
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 10:49

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