Campus Units

Civil, Construction and Environmental Engineering, Electrical and Computer Engineering, Center for Nondestructive Evaluation (CNDE)

Document Type

Presentation

Conference

36th IMAC, A Conference and Exposition on Structural Dynamics 2018

Publication Version

Published Version

Publication Date

5-30-2018

Journal or Book Title

Structural Health Monitoring, Photogrammetry & DIC

Volume

6

First Page

109

Last Page

119

Research Focus Area

Structural Engineering

DOI

10.1007/978-3-319-74476-6_16

Conference Title

36th IMAC, A Conference and Exposition on Structural Dynamics 2018

Conference Date

February 12-15, 2018

City

Atlantic City, NJ

Abstract

Safe and reliable operation of hypersonic aircraft, space structures, advanced weapon systems, and other high-rate dynamic systems depends on advances in state estimators and damage detection algorithms. High-rate dynamic systems have rapidly changing input forces, rate-dependent and time-varying structural parameters, and uncertainties in material and structural properties. While current structural health monitoring (SHM) techniques can assess damage on the order of seconds to minutes, complex high-rate structures require SHM methods that detect, locate, and quantify damage or changes in the structure’s configuration on the microsecond timescale.

This paper discusses the importance of microsecond structural health monitoring (μSHM) and some of the challenges that occur in development and implementation. Two model-based parameter estimators are examined for estimating the states and parameters of an example time-varying system consisting of a two degree of freedom system with a sudden change in a stiffness value that simulates structural damage. The ability of these estimators to track this stiffness change, the role of measurement noise, and the need for persistent excitation are examined.

Comments

This proceeding is published as Joyce, B. S., J. Hong, J. C. Dodson, J. C. Wolfson, and S. Laflamme. "Adaptive observers for structural health monitoring of high-rate, time-varying dynamic systems." In: Niezrecki C., Baqersad J. (eds) Structural Health Monitoring, Photogrammetry & DIC, Conference Proceedings of the Society for Experimental Mechanics Series 6 (2019): 109-119. DOI: 10.1007/978-3-319-74476-6_16.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf

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