Final Report Summary - SPRINT (SPRiNT - Smart Panels for the Reduction of Noise Transmission)
Since the beginning of the project the work performed can be summarized as follows. A mathematical model has been built which allows for simulation of the sound transmission through a smart double panel system equipped with decentralised velocity feedback control units. This model has been first used to perform simulations with ideal velocity sensors and force actuators. The model has also been adjusted to include the frequency response functions of miniature voice coil actuators and accelerometer sensors. In addition, extensive preparations were performed to build the electromechanical test rig and the controller unit. Finally, the testing rig was built in a form of an acoustic aquarium, with the smart double panel on top, together with a miniature electronic controller with very low energy consumption. The electromechanical testing rig can be seen on the attached photographs. This testing rig can be used to perform experimental analyses of the efficiency of the investigated control approach to reduce noise transmission through the smart structure.
The main results achieved include the development of the mathematical model, the manufacturing of the testing rig and the electronic controller. This means that the 1st milestone has been achieved as indicated in the work plan for the project. In addition, the work on the project progressed more quickly than planned such that the manufacturing of the electronic controller (which was planned through months 13 through 24) has been completed by the month 18. It was possible to make this controller rather miniature controller with low energy consumption (see the attached documents).
The final results are expected to enable successful demonstration of a very interesting and novel active control technique. In addition, the experimental validation of the proposed active control method using the completed testing rig will significantly increase the knowledge on the effectiveness of the method, and potential mechanisms for improving the method. It is very likely that further high quality publications in peer review journals will result from the experimental research to be performed. This, in turn, will enable the researcher to become more independent scientist.