A NEW INSTRUMENT FOR COLLECTING DYNAMIC DATA OF ROTORS

A new and practical instrument to collect the dynamic data of rotors h as been developed. The instrument is described and the signal transmit ting properties have been tested. The test results show that the ampli tude-frequency performance, the linear error, and the channel-isolatio n ability of this instrument satisfy the testing requirement. As an ap plication example, this new instrument was used to test gear vibration on a gear testing table. The system has a very high anti-interference ability and excellent stability. The properties of this instrument ar e as follows: dynamic maximum frequency is 50 kHz, static sine distort ion degree is less than 1%, dynamic channel isolation is -40 dB, dynam ic Linear error is less than 1%, both the static and dynamic gains are 50-200 times. The test results are consistent with the theoretical ca lculations. The system has been applied to collect dynamic data on rot ors such as gears, axels, and engine propellers. (C) 1998 American Ins titute of Physics.