Structural displacement tracking by eigenstrain actuation: Computational and experimental validations

Hans Irschik, Michael Krommer, Manfred Nader, Christian Zehetner, Markus Zellhofer

Research output: Chapter in Book/Report/Conference proceedingsConference contributionpeer-review


In the present paper, we seek for a control actuation, which, when being subjected together with some imposed transient force loading, produces a desired (prescribed) displacement field in a linear elastic structure. In our study, special emphasis is laid upon smart structures, i.e. on a control actuation by eigenstrains induced via piezoelectric or thermal actuators, or via analogous effects, such as magnetostriction or pre-stress. It is shown that the actuation stresses due to the distributed control eigenstrains must satisfy certain quasi-static equilibrium conditions, where auxiliary body-forces and auxiliary surface tractions are to be taken into account. The latter auxiliary loading can be directly computed from the imposed loading and from the desired displacement field to be tracked. Hence, despite we are dealing with a dynamic problem, a straightforward computation of proper actuator distributions can be performed in the framework of quasi-static equilibrium conditions only. © 2007 Civil-Comp Press.
Original languageEnglish
Title of host publicationProceedings of the 11th International Conference on Civil, Structural and Environmental Engineering Computing, Civil-Comp 2007, September 18-21, St. Julians, Malta
EditorsB.H.V. Topping
Place of PublicationSt. Julians, Malta
PublisherCivil-Comp Press
Number of pages4
ISBN (Print)9781905088157
Publication statusPublished - 2007


  • Displacement tracking
  • Eigenstrain
  • Piezoelectric actuation
  • Shape control
  • Smart structures

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