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METHOD OF MODELLING THE EFFECT OF A FAULT ON THE BEHAVIOUR OF A SYSTEM

  • US 20090299713A1
  • Filed: 10/23/2006
  • Published: 12/03/2009
  • Est. Priority Date: 10/24/2005
  • Status: Abandoned Application
First Claim
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1. A method of modelling the effect of a fault on the behaviour of a system, comprising:

  • (a) providing variable in a functional model of a system, wherein setting a variable to true injects a specified fault and wherein setting the variable to false causes the model to operate as if the fault is not present;

    (b) setting a variable to true to modify the functional model to specify a fault in the system;

    (c) running the functional model in accordance with a test, the test having an input and an expected output, the input defining the value of at least one input variable over a period of time and the expected output defining the expected value of at least one output variable over the period of time;

    (d) the functional model calculating, in dependence on the value of the input variable defined by the input, a modelled output comprising the modelled value of the at least one output variable over the period of time; and

    (e) comparing the modelled output with the expected output to determine a severity score for the fault based on the difference between the modelled output and the expected output.

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