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Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
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Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
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Comprehensive Design Method of a High-Frequency-Response Fast Tool Servo System Based on a Full-Frequency Error

Zelong Li1,2,3, Chaoliang Guan1,2,3, Yifan Dai1,2,3

  • 1College of Intelligence Science and Technology, National University of Defense Technology, 109 Deya Road, Changsha 410073, China.

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Summary
This summary is machine-generated.

This study developed a high-performance fast tool servo (FTS) system for precision optical mirror machining. The novel design significantly reduces tracking errors, improving surface accuracy in optoelectronic applications.

Keywords:
Prandtl–Ishlinskii hysteresis modelfast tool servofeedforward compensatorpiezoelectric actuatorzero phase error control

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Area of Science:

  • Optoelectronics
  • Precision Engineering
  • Control Systems

Background:

  • High-performance optical systems demand superior surface accuracy in optical mirrors.
  • Conventional fast tool servo (FTS) systems struggle with low working frequencies and large tracking errors due to mechanical limitations and control issues.

Purpose of the Study:

  • To design a high-performance FTS system overcoming limitations of conventional designs.
  • To improve surface accuracy for optical mirrors in advanced optoelectronic applications.

Main Methods:

  • Designed a flexure hinge servo turret with a high natural frequency using multi-objective optimization and finite element simulations.
  • Developed a composite control algorithm incorporating a modified Prandtl-Ishlinskii inverse hysteresis model and a zero-phase error tracker.

Main Results:

  • Achieved a high natural frequency in the servo turret design.
  • Effectively compensated for piezoelectric actuator hysteresis and control system phase delay.
  • Reduced tracking error to less than 10% across the full 0-1000 Hz frequency range.

Conclusions:

  • The proposed high-performance FTS system effectively addresses the limitations of conventional systems.
  • The developed method enhances precision machining for high-quality optical mirrors in optoelectronics.