Multibody systems with distributed piezoelectric actors and sensors in flexible bodies
Rose, M. and Sachau, D. (2001) Multibody systems with distributed piezoelectric actors and sensors in flexible bodies. In: Design Engineering Technical Conferences & Computers and Information in Engineering Conference, p. 377. ASME. "2001 ASME Design Engineering Technical Conferences", Pittsburgh, PA, USA, September 9-12, 2001. ISBN 0-7918-3531-6.
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Efficiency in high speed mechanism can be further increased by use of lightweight construction. But quite often these structures have the drawback of being susceptible to vibrations. This can be overcome by applying the technology of smart structures. Here distributed actuators and sensors made from piezoceramic (PZT) material are capable to actively reduce the unwelcome vibrations if implemented within a control loop. For the optimal design of such kind of mechanism up-to-date simulation tools have to be developed further. To simulate the dynamic behavior of lightweight structures undergoing large motions the multibody approach is a suitable tool. The necessary parameters in the equations of motion for the flexible body can be calculated from the output of a finite element code. The large number of variables from the finite element model have to be reduced to only a few generalized coordinates. Therefore a modal reduction is applied in combination with the introduction of a moving frame of reference. Beyond this technique so called active modes are introduced to represent the impact of the active strain by the PZT patches. These active modes combined with natural modes represent the body deformation within the multibody model. As an example the slider/crank mechanism with actively controlled PZT patches on the crank is simulated.
|Document Type:||Conference or Workshop Item (Paper)|
|Additional Information:||LIDO-Berichtsjahr=2001, monograph_id=DETC2001/VIB-21314,|
|Title:||Multibody systems with distributed piezoelectric actors and sensors in flexible bodies|
|Journal or Publication Title:||Design Engineering Technical Conferences & Computers and Information in Engineering Conference|
|Page Range:||p. 377|
|Series Name:||DETC 2001 Abstracts|
|Keywords:||piezoceramic, multibody, smart structures, vibration control|
|Event Title:||"2001 ASME Design Engineering Technical Conferences", Pittsburgh, PA, USA, September 9-12, 2001|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||no assignment|
|HGF - Program Themes:||no assignment|
|DLR - Research area:||Transport|
|DLR - Program:||no assignment|
|DLR - Research theme (Project):||UNSPECIFIED|
|Institutes and Institutions:||Institute of Composite Structures and Adaptive Systems > Institut für Strukturmechanik|
|Deposited By:||Sibylle Wolff|
|Deposited On:||16 Sep 2005|
|Last Modified:||14 Jan 2010 16:15|
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