System failure early warning method based on baseline model and Bayesian factor
A baseline model and system failure technology, applied in general control systems, control/regulation systems, instruments, etc., can solve the problems of inaccurate reflection of individual system characteristics, low cost, lagging monitoring system failure warning, etc., to achieve early detection of timing, Effect of improving sensitivity and robustness, improving sensitivity and reliability
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[0094] The embodiments described here are only used to explain and illustrate the present invention, not to limit the present invention.
[0095] In this embodiment, the gas path performance failure of an aero-engine is used as the monitoring object. Typical gas path component failures include sudden failures or sudden failures in the case of slow performance degradation. In addition, sensor failures (such as EGT temperature sensor failures) are also Common faults in the field. Firstly, the engine simulation model is used to simulate the data of 200 flights under the take-off state. Assuming that the fault occurs on the 101st flight, a total of three typical gas path faults are simulated (as shown in Table 1).
[0096]
[0097] Table 1 Fault simulation of typical air circuit components
[0098] failure mode Fault characteristics 1 Sudden failure of high pressure compressor The efficiency and flow capacity of the high-pressure compressor decreased b...
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