A new type of multi-degree-of-freedom miniaturization actuator using symmetric piezoelectric pusher element for a pocket sun-tracking system

S. C. Shen, P. C. Tsai, Y. J. Wang, H. J. Huang

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

This study presents a 2 × 2 pocket sun-tracking system that combines a multi-degree-of-freedom motion (multi-DOF) piezoelectric actuator with a hemisphere concentrator lens. The multi-DOF piezoelectric actuator consists of two parallel symmetric piezoelectric pusher elements (SPPEs) and ball-bearing bases. The proposed multi-DOF piezoelectric actuator uses three SPPE vibration modes to rotate a hemisphere concentrator lens along three perpendicular axes. The experiment in this study demonstrates how the 2 × 2 pocket sun-tracking system is driven by different modes and rotates around the X-, Y-, and Z-axes. When applying 3 V pp to a multi-DOF piezoelectric actuator, the rotating accuracies of the 2 × 2 pocket sun-tracking system along the X-, Y-, and Z-axes were 0.022°, 0.022°, and 0.007°, respectively, and the driving frequencies along the X-, Y-, and Z-axes were 223.4 kHz, 223.2 kHz, and 225 kHz, respectively. The results confirm that the 2 × 2 pocket sun-tracking system was accomplished successfully using the multi-DOF piezoelectric actuator.

Original languageEnglish
Pages (from-to)114-121
Number of pages8
JournalSensors and Actuators, A: Physical
Volume182
DOIs
Publication statusPublished - 2012 Aug

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

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