An aircraft is provided and includes a rotor, which is rotatable relative to an airframe, a rotor, which is rotatable relative to the airframe and which generates a rotor induced vibration, an engine to generate rotational energy, a drive portion to transfer the rotational energy from the engine, a gearbox disposed to transmit the rotational energy from the drive portion to the rotor to drive rotor rotation, support members connecting the gearbox to the airframe and an actuation system configured to generate an anti-vibration load applicable to the gearbox via an actuator comprising an actuator element disposed along one of the support members and a stinger element extending from the actuator element to a connection point of the support member and the gearbox to transmit a portion of the anti-vibration load from the actuator element to the connection point to counter the rotor induced vibration at the gearbox.