In this work piezo-stack actuators mounted in consoles are utilized to actively dampen vibrations of a flexible car body structure by introducing bending moments. Using an example of a heavy metro vehicle the complete design for the active vibration damping system is presented. Both analytical modeling and a system identification of the vehicle are described, issues of modal representation and model reduction are covered, and a robust controller design is motivated and explained. The excellent performance of the proposed method is documented by both experimental results from a scaled model and an extensive co-simulation of the overall system. In the remainder of this paper a description of the system and the active control scheme is given. Since the finite-element (FE) model always differs from the real vehicle an identification procedure is outlined in the following section and results for the scaled experiment are given. Then a short background on robust control design and the controller design is presented, some considerations on currently available piezo-stack actuators are included, and the resulting performance of the proposed control concept is demonstrated in an extensive co-simulation. The paper is concluded by a discussion and an outlook.
Vibration damping of a flexible car body structure using piezo-stack actuators
Schwingungsdämpfung einer flexiblen Karosserie mit Piezostapel-Aktoren
IFAC, IFAC World Congress, 17 ; 5636-5641
2008
6 Seiten, 12 Bilder, 3 Tabellen, 13 Quellen
Conference paper
English
Vibration damping of a flexible car body structure using piezo-stack actuators
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