Design of a piezoelectric actuator and compliant mechanism combination for maximum energy efficiency

Mostafa Abdalla, Mary I. Frecker, Zafer Gürdal, Terrence Johnson, Douglas K. Lindner

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


The combined optimization of a compliant mechanism and a piezoelectric stack actuator for maximum energy conversion efficiency is considered. The analysis assumes all components to be free from dissipation and that the piezoelectric stack actuator is driven by an ideal sinusoidal voltage source. The energy conversion efficiency is defined as the ratio of the output mechanical energy to the input electric energy. Using linear two-port models, an analytical expression for the maximum energy conversion efficiency is derived. It is shown that the optimization of the piezoelectric stack actuator can be decoupled from the topology optimization of the compliant mechanism. Computational verification of the analytical results is presented for two ground structures modeled using frame elements. The trade-off between displacement amplification and maximization of the energy conversion efficiency is examined.

Original languageEnglish (US)
Pages (from-to)1421-1430
Number of pages10
JournalSmart Materials and Structures
Issue number6
StatePublished - Dec 1 2005

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering


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