Mode Truncation Effects on Flexible Space Structures

by H. Miura, Kyoto Univ, Japan,
M. Kobayakawa, Kyoto Univ, Japan,
K. Ogasawara, Kyoto Univ, Japan,
H. Imai, Kyoto Univ, Japan,



Document Type: Proceeding Paper

Part of: Structural Safety and Reliability

Abstract:

This paper deals with the problem of active vibration control of flexible space structures. The main difficulty associated with this problem is that the structure has infinite vibration modes so that higher modes have to be truncated in designing controllers. It is possible that the modal truncation causes so-called spillover instability. This paper provides a new method for designing a stabilizing controller for flexible space structures. The method is based on a pole assignment algorithm which offers some design freedom beyond assignment of closed loop poles. The freedom is utilized to avoid spillover instability. A simulation study is presented for demonstrating the usefulness of the proposed algorithm.

Subject Headings: Vibration | Space structures | Space frames | Algorithms | Active control | Structural control | Structural design

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