To achieve higher bypass ratios and thus increase efficiency, high-speed planetary gearboxes are applied to geared turbofan engines. The gear meshing inside the gearbox causes high-frequency vibration that can potentially be uncomfortable for passengers in terms of airborne noise. In this work, a system for active vibration control using inertial mass actuators is proposed. One of the key challenges in the design of the system is the high frequency range around 5 kHz of the gear mesh vibration. The system requirements regarding frequency range and force are identified experimentally using a planetary gearbox test rig. The choice, design and development of the inertial mass actuator is presented. Piezoelectric shear actuators are selected due to their comparatively small electric capacitance, which is advantageous for the power amplifier. A simulation allows the optimization of actuator and amplifier properties. Parameters of the used models are identified experimentally. The performance of the final actuator-amplifier-unit is tested using the test-rig. The achievable vibration reduction is presented and results are discussed
