Gear transmission error excitation is one of the major noise and vibration sources in power transmission systems. The response is often dominated by tonal peaks that occur at the fundamental mesh frequency and its harmonics. The excessive vibrations can generate very annoying whine, cause structural damage, and limit the performance of power transmitting components. To address this critical problem, an internal active shaft transverse vibration control concept employing a piezoelectric stack actuator is applied to target the gearbox vibrations at the dominant mesh frequencies. A closed-loop power re-circulating dual gearbox setup is used to test the capability of the proposed active control prototype. The underlying controller is based on a modified filtered-x LMS algorithm with frequency estimation technique for computing the appropriate control signal. The experimental results yield more than 10 dB reduction in housing vibrations at some of the mesh harmonics over a range of operating speeds.
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