Abstract
With characteristics analysis of the vibration signal from the diesel engine, a new method for identifying the characteristic frequency band is put forward by adopting its IMF component. The diesel engine vibration signals are disposed by using EMD method and the IMF components with respond to the main interference factors is eliminated. Then, the true vibration signal from diesel engine could be gotten by reconstructing the remaining IMF components, and the working state could be estimated combing with the history condition of the diesel engine. The test results showed that the being reconstructed signal can reflect the true trend of the fuselage vibration for the diesel engine.
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