Active vibration control of a kitchen hood via piezoelectric patch

This paper presents a full analysis and development of a system for vibrations reduction in a kitchen hood by using piezoelectric actuators. The control system is based on a feedback controller whose action depends on a single acceleration sensor collocated with the actuator. Two different resonant control laws have been designed: the first one operates without the information of the hood motor velocity; the second one is a more sophisticated controller which exploits also the velocity information. Overall, with the information of the motor velocity the best performances are guaranteed with a reduction of 75% of the vibrations. The resonant control system without the motor velocity information provides the best compromise in terms of performances (65% of reduction) and complexity of the implemented system. Tests held in anechoic chamber have shown the influence of the reduction of vibration upon the acoustic noise.