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Proceedings Paper

Spurious nonminimum phase zeros in models of smart structures
Author(s): Edward A. Henrich; James T. Gillis; Jennifer M. O'Connor
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Paper Abstract

This paper addresses the implications of spurious nonminimum phase zeros for design of control systems with noncollocated sensors and actuators. The relationship between the finite- element model and the control system model is examined in detail, with particular emphasis on the physical analogies of nonminimum phase zeros in the finite-dimensional representation of the system. Finite element models of constrained systems may be used to determine which zeros are spurious. Synthesis of accurate transfer functions is demonstrated using the idea of constrained modes. By considering the infinity norm of the undermodelling, the exact residue model even with spurious nonminimum phase zeros is the preferred model for control system design.

Paper Details

Date Published: 6 May 1994
PDF: 9 pages
Proc. SPIE 2190, Smart Structures and Materials 1994: Smart Structures and Intelligent Systems, (6 May 1994);
Show Author Affiliations
Edward A. Henrich, The Aerospace Corp. (United States)
James T. Gillis, The Aerospace Corp. (United States)
Jennifer M. O'Connor, The Aerospace Corp. (United States)

Published in SPIE Proceedings Vol. 2190:
Smart Structures and Materials 1994: Smart Structures and Intelligent Systems
Nesbitt W. Hagood, Editor(s)

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