Method and system for automatically verifying fault hypotheses predetermined by a user

• US 7,246,265 B2
• Filed: 03/24/2004
• Issued: 07/17/2007
• Est. Priority Date: 09/24/2001
• Status: Active Grant

• Current Assignee: Intellectual Ventures II LLC (Intellectual Ventures LLC)
• Original Assignee: ABB Research Ltd. (ABB Ltd.)
• Inventors: Hu, Zaijun, Vollmar, Gerhard, Kabore, Pousga
• Primary Examiner(s): Baderman; Scott
• Assistant Examiner(s): BONURA, TIMOTHY M
• Application Number:
  US10/811,472
• Publication Number:
  US 20040205400A1
• Time in Patent Office: 1,210 Days
• Field of Search: 714/26, 714/37, 717/124, 717/130, 717/131, 700/26
• US Class Current: 714/26
• CPC Class Codes: G05B 23/0248 Causal models, e.g. fault tree; digraphs; qualitative physics
• CPC Class Codes: G06F 11/2257 using expert systems

Abstract

A system is suitable for carrying out a method for the automated processing of fault hypotheses in a course of a fault cause analysis in the case of a fault event in a technical installation. A data processing system uses knowledge-based models for fault cause analysis and physical models of installation functions and processes that can be carried out by the technical installation. The system has a first unit for calculating and storing installation and process states. The first unit has access to the physical models and to data that is stored in a data server for the technical installation. The system has a second unit for hypothesis processing and an input/output device.

Claims

1. A method for automated processing of fault hypotheses in a course of a fault cause analysis in a case of a fault event in a technical installation, which comprises the steps of:

providing a data processing system which uses knowledge-based models for the fault cause analysis and physical models of installation functions and processes carried out by the technical installation, the data processing system having a first processor for calculating and storing installation and process states and the first means having access to the physical models and to data relating to the technical installation stored in a data server, the data processing system further having a second processor for hypothesis processing and an input/output device;

upon occurrence of a fault, determining, by a user of the data processing system, an existence of a fault hypothesis;

accessing, through the second processor for hypothesis processing, results of a calculation of the installation and process states and accessing a checklist of the knowledge-based models for automatically verifying the fault hypothesis determined to exist by the user in the determining step on a basis of conditions associated with checklist items in the checklist;

entering a verification result for each checklist item in a result list; and

outputting the result list.

2. A system for automated verification of fault hypotheses determined by a user in a course of a fault cause analysis in a case of a fault event in a technical installation, the system comprising:

a data server storing data relating to the technical installation; and

a data processing system processing knowledge-based models for the fault cause analysis and physical models of technical installation functions and processes which can be carried out by the technical installation, said data processing system containing;

a first processor for calculating and storing installation and process states, said first means having access to the physical models and to the data stored in said data server for the technical installation;

a second processor for hypothesis processing;

an input/output device connected to said second processor for hypothesis processing, said input/output device being used as an interface by the user to determine the existence of a fault hypothesis in response to the fault event; and

said second processor being configured to process and verify the fault hypothesis determined by the user.

3. The system according to claim 2, wherein said data processing system is configured such that once a user has predetermined a fault hypothesis, said second processor for hypothesis processing accesses results of a calculation of the installation and process states and accesses a checklist of the knowledge-based models to automatically verify the fault hypothesis on a basis of conditions which are associated with checklist items in the checklist, enters the verification result for each checklist item in a result list, and outputs the result list.