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RESEARCH PAPERS: Radiative Transfer

Two Approaches to Optimal Sensor Locations

[+] Author and Article Information
T. D. Fadale

Department of Aeronautics and Astronautics, University of Washington, Seattle, WA 98185

A. V. Nenarokomov

Department of Space System Engineering, Moscow Aviation Institute, Moscow, Russia

A. F. Emery

Department of Mechanical Engineering, University of Washington, Seattle, WA 98185

J. Heat Transfer 117(2), 373-379 (May 01, 1995) (7 pages) doi:10.1115/1.2822532 History: Received August 01, 1993; Revised August 01, 1994; Online December 05, 2007

Abstract

Accurate modeling of thermal systems depends upon the determination of the material properties and the surface heat transfer coefficients. These parameters are frequently estimated from temperatures measured within the system or on the surface or from measured surface heat fluxes. Because of sensor errors or lack of sensitivity, the measurements may lead to erroneous estimates of the parameters. These errors can be ameliorated if the sensors are placed at points of maximum sensitivity. This paper describes two methods to optimize sensor locations: one to account for signal error, the other to consider interacting parameters. The methods are based upon variants of the normalized Fisher information matrix and are shown to be equivalent in some cases, but to predict differing sensor locations under other conditions, usually transient.

Copyright © 1995 by The American Society of Mechanical Engineers
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