An application of subsystem selection in a tilt-rotor prior to an ATPA experimental test and a SEA study is presented. In [1] the use of the transmission paths as defined in the GTDT method [2] is proposed. Specifically, the direct transfer matrix is used for this purpose. The existence or not of weakly coupled subsystems is related to the formation of a block diagonal matrix as the powers of the direct transfer matrix increase. As the TD matrix is composed by summing the powers of the TD, i.e. summing the power of any order, when subsystems are not weakly coupled, the direct transfer matrix becomes more uniform and no contrast can be found. In the present work, these methods are applied to the identification of the possible subsystems in a real tilt-rotor cabin case.

The present work has been carried out in the framework of the PIANO project (Path Identification for Active Noise Control), funded by EU Horizon 2020 and Clean Sky JU under the Grant Agreement no. 885976.

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