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Planetary gearboxes play a significant role in helicopter transmission system. Fault diagnosis of planetary gearboxes is a key topic for health monitoring and maintenance of helicopter. The vibration signals of faulty planetary gearboxes have complicated spectral structures due to its distinctive and complex structure and time-variant running operation condition, leading to the difficulty in fault...
Health evaluation of the helicopter main gearbox is essential for flight safety, so many condition indicators are got by processing the vibration data, but it is difficult to evaluate the health status accurately because of the variation of operation condition. In the paper the new condition indicators are obtained by the observer of multi-layer neural network based on the analysis of the effect of...
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