Adaptive control of active balancing systems for speed-varying rotors using feedforward gain adaptation technique

This paper presents a new adaptive control method for active balancing of s peed-varying rotors. It is developed based on the feedforward gain adaptati on problem, which is a classical technique in the continuous-time adaptive control area. The condition for using this technique is the need for strict ly positive realness of the transfer function. In this research, the techni que is re-examined and modified to be appropriate for the balancing problem . It is also shown that the rotor dynamics of single-plane balancing proble m can easily be converted to a strictly positive real transfer function and that, consequently, the feedfoward gain adaptation technique can be applie d. This paper demonstrates that the developed method can be applied to a si mple Jeffcott rotor and Can also be extended to the single-plane balancing problem of general flexible rotor. Simulation studies show that the new met hod works well as expected.