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Multi-stroke anti-hysteresis algorithm based on inverse model.

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This study introduces a new multi-stroke compensation algorithm for piezoelectric actuators, improving hysteresis control for micro-nano-systems. The inverse model approach achieves over 85% hysteresis correction, enhancing precision in repetitive driving applications.

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Area of Science:

  • Micro-nano-systems engineering
  • Actuator control systems
  • Materials science

Background:

  • Piezoelectric actuators are crucial in micro-nano-systems, but their hysteresis complicates precise control.
  • Existing control strategies primarily address single-stroke operation, limiting applicability for multi-stroke repetitive tasks.

Purpose of the Study:

  • To develop a multi-stroke hysteresis compensation algorithm for piezoelectric actuators.
  • To enable precise control across any stroke range, overcoming limitations of single-stroke models.

Main Methods:

  • An inverse model approach was combined with hysteresis analysis.
  • A target line with improved linearity was defined for the rising trajectory.
  • A simplified mathematical model was developed to describe the falling trajectory and relate it to maximum stroke voltage, enabling generalization to any stroke.

Main Results:

  • The developed model effectively describes and compensates for hysteresis across various unknown strokes.
  • Hysteresis correction rates exceeded 85%, with a maximum of 93.81%.
  • The residual hysteresis error was reduced to less than 2.5%.

Conclusions:

  • The proposed inverse model-based algorithm successfully achieves effective multi-stroke compensation for piezoelectric actuator hysteresis.
  • This research extends the understanding and application of piezoelectric hysteresis compensation to complex multi-stroke scenarios.