Abstract
Flexible structure dynamics depend on the location and gains of actuator and sensors. This fact is often underestimated, although it is an important factor in the planning of structural dynamic tests, and in designing structural controllers. In this work we describe the impact of actuators and sensors gains and locations on structural properties, which includes structural controllability and observability, and structural and modal norms. Using these properties we show how to detect a damage of structural members, how to place actuators and sensors for structural testing and control, and how to tune actuators or sensors to excite a selected mode or a set of selected modes. The reader can find background material in my book [5]. The analysis is conducted in modal state-space coordinates, which are described at the beginning of this paper.
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