Abstract
An experimental study of an active shaft transverse vibration control system forsuppressing gear mesh vibratory response due to transmission error excitation in a highpower density gearbox is presented. The proposed active control concept employsa piezoelectric stack actuator to deliver the control force through a secondarybearing. A versatile test stand that includes a closed-loop, power recirculating,dual-gearbox set-up capable of high load transfer is specially designed for this work. Theunderlying controller for computing the actuation signal is based on a modifiedfiltered-x LMS algorithm with a robust frequency estimation technique. In order to avoid thecommon out-of-band overshoot problem, an integrated adaptive linear enhancer is alsoapplied. Both single mesh frequency and multi-harmonic control cases are examined toevaluate the performance of the active control system. Additionally, the impact of theadaptive linear enhancer order as well as the controller adaptation step size on activecontrol performance is evaluated. The experiments performed show more than 10 dBreduction in housing vibrations at certain targeted mesh harmonics over a range ofoperating speeds.
Published Version
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