System for determining fault causes

• US 6,952,658 B2
• Filed: 02/10/2003
• Issued: 10/04/2005
• Est. Priority Date: 08/09/2000
• Status: Expired due to Fees

• Current Assignee: ABB Research Ltd. (ABB Ltd.)
• Original Assignee: ABB Research Ltd. (ABB Ltd.)
• Inventors: Greulich, Manuel, Vollmar, Gerhard
• Primary Examiner(s): Barlow, John
• Assistant Examiner(s): Washburn, Douglas N
• Application Number:
  US10/364,004
• Publication Number:
  US 20040158434A1
• Time in Patent Office: 967 Days
• Field of Search: 700/1, 700/28, 700/51, 700/79, 700/95, 700/108, 700/109, 700/110, 700/111, 702/127, 702/179, 702/182, 702/183, 702/185, 702/187, 714/1, 714/2, 714/100, 714/124, 714/127
• US Class Current: 702/185
• CPC Class Codes: G06F 11/2257 using expert systems

Abstract

A system for determining fault causes, including automated determination of hypotheses in the context of a fault cause analysis and automated performance of hypotheses verification, has a data processing device connected to a data input and visualization device and to a data memory. The data processing device contains a processing unit for fault cause analysis, a first comparator, a second comparator and a hypothesis selector. The data memory contains a general fault model, a fault event list, an empirical database and a storage area to store a log of the current fault cause analysis. The data processing device, following the selection of a fault event from the displayed fault event list by a user, to display to the latter hypotheses suggested by the system, following the selection of hypotheses to be verified, to carry out hypotheses verification and, as the result, to log and display determined fault causes.

Claims

1. A system for determining fault causes, the system automatically determining hypotheses in a context of a fault cause analysis and performing an automated performance of hypotheses verification, the system comprising:

a data input and visualization device;

a data memory containing a general fault model, a fault event list, an empirical database and a storage area for storing a log of current fault cause analysis; and

a data processing device connected to said data input and visualization device and to said data memory, said data processing device containing a processing unit for performing the fault cause analysis, a first comparator connected to said processing unit, a second comparator connected to said processing unit, and a hypothesis selector connected to said processing unit, following a selection by a user of a fault event provided by the fault event list, said data processing device displaying possible hypotheses to the user, carrying out a hypotheses verification process on selected hypotheses and, one of logging and displaying determined fault causes.

2. The system according to claim 1, wherein said data input and visualization device includes a web browser, a use of said data input and visualization device permitting the user to make entries and to display intermediate and final results from analyses.

3. The system according to claim 1, wherein said processing device is programmed to:

display to the user the fault event list and to store the fault event selected by the user or selected fault events in the log of the current fault cause analysis;

use said first comparator to compare a description of the fault event belonging to a selected current fault event with contents of a general fault model and, from the general fault model, to display suitable fault trees for carrying out a further analysis and, following selection of a fault tree, to store the fault tree in the log of the current fault cause analysis;

use said second comparator to compare the description of the selected current fault event with empirical fault analyses from said empirical database and to display suitable empirical fault analyses, and, following selection of the empirical fault analyses, to store the empirical fault analyses in the log of the current fault cause analysis;

use said hypothesis selector to summarize and display in a list the hypotheses contained in a selected empirical fault analyses and, following selection of the hypotheses, to store the selected hypotheses in the log of the current fault cause analysis; and

use stored data from the log of the current fault cause analysis, to process the general fault model, and in the hypotheses verification process of the selected hypotheses and, after the hypotheses verification process, to store the determined fault causes in the log of the current fault cause analysis.

4. The system according to claim 1, wherein said processing device:

displays to the user the fault event list and stores a fault event selected by the user or selected fault events in the log of the current fault cause analysis;

uses said first comparator to compare a description of the fault event belonging to a selected current fault event with contents of a general fault model and, from the general fault model, displays suitable fault trees for carrying out a further analysis and, following selection of a fault tree, stores the fault tree in the log of the current fault cause analysis;

uses said second comparator to compare the description of the selected current fault event with empirical fault analyses from said empirical database and displays suitable empirical fault analyses, and, following selection of the empirical fault analyses, stores the empirical fault analyses in the log of the current fault cause analysis;

uses said hypothesis selector to summarize and display in a list the hypotheses contained in a selected empirical fault analyses and, following selection of the hypotheses, stores the selected hypotheses in the log of the current fault cause analysis; and

uses stored data from the log of the current fault cause analysis, to process the general fault model and in the hypotheses verification process and, after the hypotheses verification process, stores the determined fault causes in the log of the current fault cause analysis.