elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

Diagnosis of Physical Systems with Hybrid Models using Parametrized Causality

Mosterman, P.J. (2001) Diagnosis of Physical Systems with Hybrid Models using Parametrized Causality. In: Hybrid Systems: Computational and Control, 4th International Workshop, HSCC 2001, Rome, Italy, March 28-30, 2001 Lecture Notes in Computer Science, 2034. Springer. ISBN 3-540-41866-0.

Full text not available from this repository.

Abstract

Efficient algorithms exist for fault detection and isolation of physical systems based on functional redundancy. In a qualitative approach, this redundancy can be captured by a temporal causal graph (TCG), a directed graph that may include temporal information. However, in a detailed continuous model, time constants may be present that are beyond the bandwidth of the data acquisition system, which leads to incorrect fault isolation because of a difference in observed and modeled behavior. To solve this, the modeled time constants can be taken to be infinitely small, which results in a model with mixed continuous/discrete, hybrid behavior that is difficult to analyze because the causality of the directed graph may change. In this paper, to avoid the combinatorial explosion when using a bank of TCGs in parallel, causal paths are parametrized by the state of local switches. The result is a hybrid model that produces parametrized predictions that can be efficiently matched against observed behavior.

Document Type:Contribution to a Collection
Additional Information: LIDO-Berichtsjahr=2000,
Title:Diagnosis of Physical Systems with Hybrid Models using Parametrized Causality
Authors:
AuthorsInstitution or Email of Authors
Mosterman, P.J.UNSPECIFIED
Date:2001
Journal or Publication Title:Hybrid Systems: Computational and Control, 4th International Workshop, HSCC 2001, Rome, Italy, March 28-30, 2001
Refereed publication:Yes
In ISI Web of Science:No
Volume:2034
Editors:
EditorsEmail
Benedetto, Maria Domenica DiUNSPECIFIED
Sangiovanni-Vincentelli, Alberto L.UNSPECIFIED
Publisher:Springer
Series Name:Lecture Notes in Computer Science
ISBN:3-540-41866-0
Status:Published
Keywords:hybrid system, hybrid diagnosis, model based diagnosis, quantitative reasoning
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W SY - Technik für Raumfahrtsysteme
DLR - Research area:Space
DLR - Program:W SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):UNSPECIFIED
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Robotics and Mechatronics
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 17:49

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.