3 edition of Multiple fault isolation in redundant systems found in the catalog.
Multiple fault isolation in redundant systems
by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va
Written in English
|Statement||Krishna R. Pattipati, Ann Patterson-Hine, David Iverson.|
|Series||[NASA contractor report] -- 205940., NASA contractor report -- NASA CR-205940.|
|Contributions||Patterson-Hine, Ann., Iverson, Dave., United States. National Aeronautics and Space Administration.|
|The Physical Object|
vanced fault detection, isolation and recovery techniques. Research and development activities focus on system level FDIR of unmanned spacecraft: implementing innova-tive mechanisms combined with well-proven methods of conventional FDIR can reduce the number of safe mode events and increase operational time of a Size: 4MB. A new scheme for multiple fault detection and isolation for rotational mechatronic systems, by means of analytical redundancy and adaptive filtering. DYNA, 86(), pp. 40 , April - June, iple research efforts have been directed in developing fault detection and isolation schemes that do not require direct variable monitoring [1 -2].
Fault Detection and Isolation for an Uncertain Takagi-Sugeno Fuzzy System using the Interval Approach: /ch This work deals with the fault detection and localization in the case of uncertain nonlinear systems. The presented method uses the diagnosis based onAuthor: Hassene Bedoui, Atef Kedher, Kamel Ben Othman. Redundancy can be a way of providing fault tolerance in the larger system, but redundancy on its own does not guarantee fault tolerance, particularly against all kinds of faults. It's only redundancy if each separate way of accomplishing a goal can function .
Cisco NX-OS has a modularized architecture that compartmentalizes components for fault isolation, redundancy, and resource efficiency. Isolation of Processes Process Restartability. This book focuses on model based fault detection and isolation for robotic systems. The methodology presented in this book allows the robotic system to self-diagnose its faults so that catastrophic consequences can be averted. The method is both robust and practical and therefore has the potential to be implemented in the future robotic systems.
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MULTIPLE FAULT ISOLATION IN REDUNDANT -AmesJUniversity Aerospace Institutes Agreement NCC Final Report Dr. Krishna R. Pattipati Dept. of Electrical and Systems Engineering University of Connecticut Storrs, CT Tel./Fax: () Dr.
Ann Patterson-Hine Dr. David Iverson NASA-Ames Research CenterFile Size: 6MB. Fault diagnosis in large-scale systems that are products of modem technology present formidable challenges to manufacturers and users. This is due to large number of failure sources in such systems and the need to quickly isolate and rectify failures with minimal down time.
It can be shown that single faults and minimal faults, i.e., minimum number of failures with a failure signature different from the union of failure signatures of individual failures, together with their Multiple fault isolation in redundant systems book signatures, constitute the necessary information for fault diagnosis in redundant systems.
Multiple fault isolation in redundant systems: NASA-Ames/university aerospace institutes agreement, NCC, final report Author: Krishna R Pattipati ; Ann Patterson-Hine ; David L Iverson. Fault diagnosis in large-scale systems that are products of modem technology present formidable challenges to manufacturers and users.
This is due to large number of failure sources in such systems and the need to quickly isolate and rectify failures with minimal down time.
In addition, for fault-tolerant systems and systems with infrequent opportunity for maintenance (e.g., Hubble telescope. Multiple Fault Isolation in Redundant Systems.
By V. Raghavan, Krishna R. Pattipati, Ann Patterson-Hine, M. Shakeri and David L. Iverson. Abstract. We consider the problem of sequencing tests to isolate multiple faults in redundant (fault-tolerant) systems with minimum expected testing cost (time).
It can be shown that single faults and. Multiple Fault Isolation in Redundant Systems. In addition, for fault-tolerant systems and systems with infrequent opportunity for maintenance (e.g., Hubble telescope, space station), the assumption of at most a single fault in the system is unrealistic.
In this project, we have developed novel block and sequential diagnostic strategies to Author: Krishna R. Pattipati. Abstract: In this paper, we consider the problem of constructing near-optimal test sequencing algorithms for diagnosing multiple faults in redundant (fault-tolerant) systems.
The computational complexity of solving the optimal multiple-fault isolation problem is super-exponential, that is, it is much more difficult than the single-fault isolation problem, which, by itself, is NP-hard. Under such novel strategies, the proposed method achieves fine-grained fault isolation.
Based on this method, we further designed a redundancy-free FR method. A novel Multiple Fault Isolation Algorithm (MUFIA) is presented below. This algorithm significantl y redu ces the number of searched system states compared to the previously mentioned algorithms.
Industrial Processes Automation 3 •Fault diagnosis: •Fault detection: Detect malfunctions in real time, as soon and as surely as possible •Fault isolation: Find the root cause, by isolating the system component(s) whose operation mode is not nominal •Fault identification: to estimate the size and type or nature of the fault.
•Fault Tolerance: File Size: 2MB. A Fault Isolation Algorithm for the Case of Multiple Faults and Multiple Fault Types. To perform fault isolation fast is critical in real-time systems. The reason is that fault isolation often is the basis for taking decision about fault accommodation. Knowing exactly the faulty component and type of the fault can make the difference Cited by: Safety Critical Systems Design: Patterns and Practices for Designing Mission and Safety-Critical Systems* * Portions adopted from the author’s book Doing Hard Time: Developing Real-Time Systems with UML, Objects, Frameworks, and Patterns, Addison-Wesley File Size: KB.
Diagnostic systems that make a single fault assumption do poorly at fault isolation when faced with multiple faults. This includes pattern matching using classification of fault signatures, and systems based on Bayes rule. This is because no single fault will explain all of the observed abnormal symptoms.
Redundancy, reliability and regulation in complex technical systems John Downer Abstract This paper argues that redundancy in engineering, should be understood as a ‘design paradigm’ that frames regulatory assessments and interpretations of all complex technical systems, profoundly shaping decisions and judgements about modernFile Size: KB.
A fault is a violation of the existing system. A fault leads to a single or multiple failure in the system. In order to avoid this type of failure, we need to remove or control the fault.
The commonly used techniques for controlling and isolating faults in the system are replication and check by: 4. in the IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, vol, no.1, Janpp In this paper, we propose a joint scheme which combines redundant residue number systems (RRNS) with module isolation (MI) for mitigating single event multiple bit.
Fault Detection and Isolation in Multiple MEMS-IMUs Configurations IEEE Transactions on Aerospace and Electronic Systems, Vol. 48, No. 3 A novel optimal redundant inertial sensor configuration in strapdown Inertial Navigation SystemCited by: However, the focus of the research and development efforts was fault detection and isolation (FDI).
In the early days, the idea was to make use of the redundancy in order to support fault-safe systems. A fault-tolerant system is able not only to detect a defective sensor, but also to isolate by: Generalized Likelihood Test for FDI in Redundant Sensor Configurations.
Kevin C. Fault detection of redundant systems based on B-spline neural network. A Method for Multiple Fault Detection and Isolation of Redundant Inertial Navigation Sensor by:.
Fault detection and isolation (FDI) functionality constitutes a critical element of spacecraft fault protection system capabilities. The FDI schemes currently implemented on board operational spacecraft suffer from a lack of systematic design by: 2.Spacecraft Fault Detection & Isolation System Design using Decentralized Analytical Redundancy Saurabh Indra and Louise Trav ´e-Massuy es Abstract Fault detection and isolation (FDI) functionality constitutes a critical ele-ment of spacecraft fault protection system .A Qualitative Approach to Multiple Fault Isolation in Continuous Systems Matthew Daigle and Xenofon Koutsoukos and Gautam Biswas Institute for Software Integrated Systems (ISIS) Department of Electrical Engineering and Computer Science Vanderbilt University Nashville, TNUSA Abstract The multiple fault diagnosis problem is important.