Complex modal testing of asymmetric rotors using magnetic exciter equippedwith Hall sensors

The complex modal testing methods developed for asymmetric rotors are brief ly discussed and their performances are experimentally evaluated. For the e xperiments, a laboratory test rotor is excited by using a newly developed, cost effective magnetic exciter equipped with Hall sensors, which measure t he excitation forces. It is concluded that the exciter system is characteri zed by a wide bandwidth and a high resolution for both the excitation and f orce measurement, and that the one-exciter/two-sensor technique for complex modal testing of asymmetric rotors is superior to the standard two-exciter /two-sensor technique in terms of practicality and realization.