NDLI: An adaptive tracking observer for failure-detection systems

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An adaptive tracking observer for failure-detection systems

Content Provider	NASA Technical Reports Server (NTRS)
Author	Sidar, M.
Copyright Year	1982
Description	The design problem of adaptive observers applied to linear, constant and variable parameters, multi-input, multi-output systems, is considered. It is shown that, in order to keep the observer's (or Kalman filter) false-alarm rate (FAR) under a certain specified value, it is necessary to have an acceptable proper matching between the observer (or KF) model and the system parameters. An adaptive observer algorithm is introduced in order to maintain desired system-observer model matching, despite initial mismatching and/or system parameter variations. Only a properly designed adaptive observer is able to detect abrupt changes in the system (actuator, sensor failures, etc.) with adequate reliability and FAR. Conditions for convergence for the adaptive process were obtained, leading to a simple adaptive law (algorithm) with the possibility of an a priori choice of fixed adaptive gains. Simulation results show good tracking performance with small observer output errors and accurate and fast parameter identification, in both deterministic and stochastic cases.
File Size	1109888
Page Count	36
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19820016331
Archival Resource Key	ark:/13960/t1vf1nr5t
Language	English
Publisher Date	1982-04-01
Access Restriction	Open
Subject Keyword	Aircraft Stability And Control Fault Tolerance Algorithms Tracking Filters Stochastic Processes Adaptive Filters Feedback Control Kalman Filters Detection Optimization Failure Kalman-schmidt Filtering Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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