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ADAPTATION OF THE CONCEPT OF MODAL ANALYSIS TO TIME-VARYING STRUCTURES

✍ Scribed by K. LIU; M.R. KUJATH

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
149 KB
Volume
13
Category
Article
ISSN
0888-3270

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✦ Synopsis

The elegance and global character of modal analysis make it very attractive for adaptation to time-varying systems. Most of the concepts of modal analysis are well established in literature and widely understood for linear time-invariant systems. This paper discusses an adaptation of modal analysis concepts to time-varying systems. A typical contemporary example of a time-varying system is a #exible space manipulator or a recon"guring space structure. An approximation of a time-varying transfer function is introduced by making assumptions about its variability. This approximate transfer function is referred to as a pseudo-transfer function. The modal parameters associated with the pseudo-transfer function are referred to as the pseudo-modal parameters. This paper discusses the validity and the extent of applicability of pseudo-modal parameters.

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