The vibrations of a flexible rotor are controlled using piezoelectric actuators. The controller includes active analog components and a hybrid interface with a digital computer. The computer utilizes a grid search algorithm to select feedback gains that minimize a vibration norm at a specific operating speed. These gains are then downloaded as active stiffnesses and dampings with a linear fit throughout the operating speed range to obtain a very effective vibration control.

The Active Vibration Control (AVC) actuators which are discussed in the literature include piezoelectric, electromagnetic (contacting and non-contacting) and hydraulic. This paper presents results of an application of rotating machinery active vibration control (AVC) utilizing piezoelectric actuators. The paper gives actual test data on an aircraft engine test stand-shaft line, unlike the majority of related papers which are entirely theoretical or provide test results only on small, laboratory rotors. The AVC significantly suppresses vibration through two critical speeds of the shaft line.

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The vibrations of a flexible rotor are controlled using piezoelectric actuators. The controller includes active analog components and a hybrid interface with a digital computer. The computer utilizes a grid search algorithm to select feedback gains that minimize a vibration norm at a specific operating speed. These gains are then downloaded as active stiffnesses and dampings with a linear fit throughout the operating speed range to obtain a very effective vibration control.