Method for testing stochastic resonance-chaotic weak signal
A weak signal detection and stochastic resonance technology, which is used in the testing of mechanical components, the testing of machine/structural components, measuring devices, etc., and can solve the problem of inability to estimate the amplitude of the signal.
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[0034] A specific example is used below to illustrate the specific process and beneficial effect of the present invention for weak signal detection:
[0035] Rubbing of moving and static parts is a common type of fault phenomenon in the rotor system that is difficult to detect and capture. It mainly occurs in the dynamic and static blade seals, rotor shaft seals and sliding bearings of the unit. Rubbing occurs for a short time and sometimes the location is uncertain. If rubbing occurs frequently, it may cause other serious failures and cause major economic losses. Therefore, trying to detect the rubbing fault of the rotor system at an early stage has practical significance for avoiding rubbing and secondary faults of the rotor system and for the healthy operation of the unit.
[0036] Through experimental research on the vibration characteristics of the rotor system when there is sharp rubbing between the dynamic and static parts, it can be known that in the early stage of ru...
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