Frequency Noise Rejection for Vibration Minimization in an AMB System

When a vibration suppression adaptive algorithm is implemented to enhance an AMB based system, a good frequency measurement or estimation of the synchronous rotation is essential [1]. In this paper, two frequency disturbance rejection methods applied to the frequency sensor measurement are compared. The ?rst method is based on the use of a Kalman Filter (KF) and the second is the implementation of a Frequency Locked Loop (FLL). Both have advantages and disadvantages related to the available hardware, noise type of the sensor, the fact of vibration minimization and the computational cost of the adaptive algorithm. Finally, experimental proofs in a laboratory testbed, based on the MBC500 Rotor Dynamics, show the effectiveness of each method.