Dynamic stability analysis of a flexible four-bar mechanism and its experimental investigation

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This paper presents a method for stability analysis of a closed-loop flexible mechanism by using modal coordinates. Mode shapes of a flexible four-bar mechanism are defined as those of individual links (single-link modes). Based on these single-link modes, the flexible four-bar mechanism has time-invariant mode shapes and its governing equations of motion become decoupled, regardless of mode-crossing. Therefore the stability of the flexible mechanism can be analyzed efficiently for each mode. Floquet theory is employed to check the stability of the mechanism. The experimental study of a flexible four-bar mechanism is also presented to verify the proposed method. The experimentally-determined bending strains and critical speeds are compared with numerical results obtained from the proposed method. The experimental and analytical results show a fairly good agreement. (C) 1997 Elsevier Science Ltd.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
1998-04
Language
English
Article Type
Article
Keywords

SYSTEMS; SPEEDS

Citation

MECHANISM AND MACHINE THEORY, v.33, no.3, pp.307 - 320

ISSN
0094-114X
DOI
10.1016/S0094-114X(97)00048-7
URI
http://hdl.handle.net/10203/74080
Appears in Collection
ME-Journal Papers(저널논문)
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