Abstract
Modern control systems are becoming increasingly complex. If failure mechanisms and effect are known, it is often sinple to make small design changes, which lead to fail safe design. The problem is to discover the large number of different failure possibilities.
The cause/consequence diagram provides a good way of describing the sequential effects in a failure, imprtant in control systems. Production of cause/consequences diagrams is at present a skilled manual task.
A method is presented for producing cause/consequence diagrams automatically, starting with block diagram of the system to be analysed and equations describing the operation of each component, undernormal and failure conditions. Theorem providing techniques are used to deduce the sequence of events occuring after a failure.
The method makes it possible to define what is meant by a "complete" failure analysis. In practice, it seems that such "complete" analyses require a large amount of computer time. Human interaction helps in avoiding unnecessarily detailed analysis, and in increasing efficiency of the analyses.
The cause/consequence diagram provides a good way of describing the sequential effects in a failure, imprtant in control systems. Production of cause/consequences diagrams is at present a skilled manual task.
A method is presented for producing cause/consequence diagrams automatically, starting with block diagram of the system to be analysed and equations describing the operation of each component, undernormal and failure conditions. Theorem providing techniques are used to deduce the sequence of events occuring after a failure.
The method makes it possible to define what is meant by a "complete" failure analysis. In practice, it seems that such "complete" analyses require a large amount of computer time. Human interaction helps in avoiding unnecessarily detailed analysis, and in increasing efficiency of the analyses.
Original language | English |
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Place of Publication | Roskilde, Denmark |
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Publisher | Risø National Laboratory |
Number of pages | 20 |
Publication status | Published - 1974 |
Series | Risø-M |
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Number | 1707 |
ISSN | 0418-6435 |
Keywords
- Risø-M-1707