Abstract: A method and system for balancing a rotating device or rotating system having a rotatable member and a shaft attached to the rotatable member, such that balancing is based on system response to simultaneous control actions to place mass, such as for example, fluid, at predetermined locations within the rotating system or rotating device. Mass can be simultaneously placed at predetermined locations within the rotating system. A system model of measured force and motion parameters can then be calculated in response to simultaneously placing mass at predetermined locations within the rotating system, in order to determine a required correction necessary to place the rotating system in a balanced state. Force can be measured at predetermined locations throughout the rotating system or rotating device in response to simultaneously placing the mass at the predetermined locations within the rotating system or rotating device.

Abstract: A system for balancing a rotatable member is provided by measuring forces and motion via accelerations at various locations of the system. The forces and moments are balanced through the use of matrix manipulation to determine appropriate counterbalance forces located at two axial positions of the rotatable member. As such, the system accounts for possible accelerations of a machine, such as a washing machine, which could not otherwise be accomplished if the motion of the machine was not measured. The system is therefore operable in conjunction with machines that are not rigidly attached to immovable objects, such as concrete floors. The algorithm permits the counterbalance forces to be calculated even though a washing machine is located on a moveable floor structure combined with carpet padding and carpets between the washing machine and a rigid support structure.