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Predictions of Unbalanced Response of Turbo Compressor Equipped with Active Magnetic Bearings through System Identification
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 Title & Authors
Predictions of Unbalanced Response of Turbo Compressor Equipped with Active Magnetic Bearings through System Identification
Baek, Seongiki; Noh, Myounggyu; Lee, Kiwook; Park, Young-Woo; Lee, Nam Soo; Jeong, Jinhee;
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Since vibrations in rotating machinery is a direct cause of performance degradation and failures, it is very important to predict the level of vibrations as well as have a method to lower the vibrations to an acceptable level. However, the changes in balancing during installation and the vibrational modes of the support structure are difficult to predict. This paper presents a method for predicting the unbalanced response of a turbo-compressor supported by active magnetic bearings (AMBs). Transfer functions of the rotor are obtained through system identification using AMBs. These transfer functions contain not only the dynamics of the rotor but also the vibrational modes of the support structure. Using these transfer functions, the unbalanced response is calculated and compared with the run-up data obtained from a compressor prototype. The predictions revealed the effects of the support structure, validating the efficacy of the method.
Active Magnetic Bearings;Unbalance Response;Stability;
 Cited by
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