Actuation Development and Evaluation for INSTAR - Inertially Stabilized Rifle

Diann Brei, James Vendlinski, Mary Frecker, Smita Bharti

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


In the use of piezoelectric actuators, it is a clear choice to use stack (or d33 mode) architectures when very high force is required or bender (or d31 mode) architectures when very high displacements are needed. However, the choice isn't as clear for applications that need simultaneously moderate to high force and displacement. This paper presents one such application, INSTAR, which is posed with this dilemma. INSTAR is a novel rifle system that has an inertially stabilized barrel via an active suspension based on piezoelectric actuation. While the frequency required for this application was low (∼10Hz), the displacement (± 200 to 400 microns) and the force (22-45 N) are moderate. Two very different actuation approaches were developed, modeled, fabricated and experimentally validated within the INSTAR demonstration platform: 1) a d31 approach based on the Recurve architecture with focus on generating higher forces than is common for d31 actuators and 2) a d33 approach based upon a compliant mechanism designed using topology optimization with focus on providing more amplified strain than is common for d33 actuators. Both approaches were successful in meeting the INSTAR requirements, but each had its own advantages and disadvantages.

Original languageEnglish (US)
Pages (from-to)338-355
Number of pages18
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2003
EventSmart Structures and Materials 2003: Smart Structures and Integrated Systems - San Diego, CA, United States
Duration: Mar 3 2003Mar 6 2003

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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