Continuous Automatic Balancing of Rotating Systems

An automatic balancing system with continuous operation is proposed, based on the use of correction masses which are continuously adjustable relative to the rotating system. A feedback control system positions these masses so as to counterbalance the inherent system unbalance. This application of feedback control principles reduces the dependence upon accuracy of calibration. A major advantage is that systems with time-varying unbalance conditions, due to wear or foreign material, can be rebalanced without interrupting operation. The application to single-mass and multiple-mass systems will be discussed, including the special considerations necessitated by operation near critical speeds.