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A multi-channel real-time sound pressure spectrum analyzer was demonstrated for investigating abnormal noises of tapered roller bearings (TRBs). The sound sensing system was developed to replace the existing quality-control method conducted by human ears. All data collected by proto-type were performed by using data processing module. The background was identified at a low frequency band. Peaks at...
According to the special form and structure of concentrated wind energy turbine, and based on the idea of largely use of wind energy, the author designed an automatic control system, which can control the wind facing of wind turbine and change bladepsilas pitch angle. Under the control this system, the concentrated wind energy turbine can not only meet the demand of wind facing under normal conditions,...
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