Active vibration control of an aluminum beam - An experimental testbed for distributed vs. centralized control
IEEE 56th Annual Conference on Decision and Control (CDC 2017)
Contribution to Conference
This paper presents an experimental test bench for assessing the practicality of distributed control strategies in the framework of spatially-interconnected systems. To compare low-complexity distributed control schemes with multi-input multioutput (MIMO) control and to assess the results experimentally requires a test bed that is sufficiently complex to display on one hand the characteristic features of a distributed system, and yet is not too complex in order not to render the MIMO synthesis problem intractable. Here a 5m long aluminum beam, equipped with 16 collocated pairs of piezoelectric actuators and sensors, is used for vibration control experiments. A MIMO model obtained by finite element modeling techniques is presented and a distributed model in the spatially-interconnected systems framework is derived. Model reduction techniques are applied to the MIMO model and a centralized controller is designed to attenuate the vibration using H∞-loopshaping techniques. Finally, the performance of the controller is experimentally validated on the beam.