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M. Hemedi, A. Schirrer, C. Westermayer, M. Kozek:
"Performance evaluation of an input/output selection criterion via normalized LQG closed-loop comparison";
Vortrag: 17th IEEE Mediterranean Conference on Control & Automation, Thessaloniki, Greece; 24.06.2009 - 26.06.2009; in: "Proceedings of the 17th IEEE Mediterranean Conference on Control & Automation", (2009), ISBN: 978-1-4244-4685-8; Paper-Nr. ThC6.3, 6 S.

One essential task in control system design is the optimal selection of inputs and outputs (I/O). In this paper a new concept for solving the I/O selection problem is proposed. It is based on normalized comparison of LQG closed loops, which are designed for each potential actuator/sensor separately. The LQG controller is iteratively tuned to obtain a prescribed and fixed value of a suitable system norm quantity. The proposed placement criterion is applied to flexible structures and demonstrated for an academic example and for a largescale blended-wing-body (BWB) passenger aircraft pre-design
model. Comparison to a state-of-the-art open-loop I/O selection
method from literature verifies the proposed approach, but also
shows that the closed-loop approach provides additional system
insight and highly flexible applicability.

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