Sensor Location for Real Time Modal Identification

During previous studies, the RTMVI (Real Time Modal Vibration Identification) method was developed for a modal parameter extraction compatible with an interactive session, with the objective of modal identification of a structure during its vibration qualification campaign to reduce cost and development time, and to maximize the returns of the test. In this context, sensor location is of primary importance for test results since it defines the specimen dynamic behaviour by providing components of the deformed shapes. The measured components must allow to make distinction between the shapes, which is conditioned by the number and the location of the sensors. This paper describes the work performed to improve this location from components of a certain number of mode shapes given by a mathematical model on candidate degrees of freedom. This is illustrated by a simple example and some results obtained in the space area.