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Multi-order cascade lag control for high precision tracking systems.

Xi Zhou1, Yao Mao1, Qianwen Duan2

  • 1Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China; Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu 610209, China.

ISA Transactions
|April 5, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a cascade lag control scheme to enhance target tracking precision for fast, mobile targets. The new method improves error suppression without altering the feedback control structure, achieving higher tracking accuracy.

Keywords:
Cascade lag controlError suppression capacityHigh precision tracking systemsParameter tuning

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Area of Science:

  • Control Systems Engineering
  • Precision Engineering

Background:

  • Traditional target tracking systems using first-order integral control struggle with high-precision tracking of fast, mobile targets.
  • The error attenuation capacity is crucial for determining tracking precision.

Purpose of the Study:

  • To propose a novel cascade lag control scheme to enhance the error suppression capacity of target tracking systems.
  • To improve tracking precision for fast and highly mobile targets without modifying the feedback control structure.

Main Methods:

  • A multi-order cascade lag control scheme is proposed as a substitute for traditional integral operators.
  • Concepts of relative order and a configuration proportion law are introduced to simplify parameter design and tuning.
  • Theoretical analysis and experimental validation in an electro-optical tracking system are employed.

Main Results:

  • The cascade lag control scheme achieves a higher amplitude ratio, leading to improved tracking precision.
  • The proposed method maintains system stability while enhancing active error suppression in the low-frequency range.
  • The relative order concept is shown to effectively relate to system performance.

Conclusions:

  • The multi-order cascade lag control scheme offers a viable solution for enhancing target tracking precision.
  • The simplified parameter design using relative order and configuration proportion law facilitates practical implementation.
  • The study demonstrates the effectiveness of the proposed control scheme in electro-optical tracking applications.