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Related Experiment Videos

Piezoelectric Actuated Phase Shifter Based on External Laser Interferometer: Design, Control and Experimental

Peng-Zhi Li1,2, Xiao-Dong Wang3, Yong-Xin Sui4

  • 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China. lipengzhi@ciomp.ac.cn.

Sensors (Basel, Switzerland)
|April 12, 2017
PubMed
Summary

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This study introduces a new framework for piezoelectric actuated phase shifters, achieving high accuracy and repeatability. The developed system demonstrates excellent performance for precise phase shifting applications.

Area of Science:

  • Mechanical Engineering
  • Control Systems
  • Nanotechnology

Background:

  • Phase shifters are crucial components in various optical and electronic systems.
  • Improving phase-shifting accuracy while managing cost is a significant engineering challenge.
  • Existing piezoelectric actuators often face limitations in precision and integrated control.

Purpose of the Study:

  • To present a novel integrated framework for the design, control, and validation of a piezoelectric actuated phase shifter.
  • To achieve a balance between high accuracy and cost-effectiveness in phase shifter technology.
  • To enhance the phase-shifting accuracy through a robust control strategy.

Main Methods:

  • Utilizing piezoelectric actuators with integrated sensors to drive double parallel four-bar linkage flexure hinge mechanisms.
Keywords:
flexurelaser interferometerpiezoelectric actuatorssemi-closed loop

Related Experiment Videos

  • Constructing a tripod structure using three such mechanisms for the phase shifter assembly.
  • Implementing a semi-closed loop control system with inner feedback and outer feedforward loops, incorporating an external laser interferometer for precise positioning.

    • Main Results:

    • Experimental validation demonstrated a linearity error of 0.21%.
    • Repeatability error was measured at 3 nm for a 10 μm displacement.
    • The integrated framework proved feasible and effective for precise phase shifter operation.

    Conclusions:

    • The developed piezoelectric actuated phase shifter exhibits excellent performance characteristics.
    • The proposed integrated framework for design, control, and validation is effective and practical.
    • This work offers a viable solution for applications requiring accurate and cost-efficient phase shifting.