[Show abstract][Hide abstract] ABSTRACT: The paper adresses the problem of simultaneous adaptive feedforward compensation and feedback compensation of vibrations (or noise) when a correlated measurement with the disturbance (an image of the disturbance) is available. The study is carried in the presence of a “positive” mechanical coupling between the compensator system and the measurement of the image of the disturbance, which often occurs in practice. The positive mechanical coupling introduces a coupling between the design of the feedback loop and the stability conditions for the adaptive feedforward compensation. Modifications of the algorithms for adaptive feedforward compensation has to be considered. The new algorithms proposed are analyzed and have been applied to an active vibration control system featuring internal positive mechanical coupling.
[Show abstract][Hide abstract] ABSTRACT: An active vibration control system using an inertial actuator for suppression of multiple unknown and/or time-varying vibrations will be presented. The objective is to minimize the residual force by applying an appropriate control effort through the inertial actuator. The system does not use any additional transducer for getting in real time information upon the disturbances. A direct feedback adaptive regulation scheme for the suppression of multiple unknown and/or time-varying vibrations will be used and evaluated in real time. It uses the internal model principle and the Youla-Kucera parametrization.