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Enhanced disturbance rejection control based test rocket control system design and validation.

Tong Li1, Andrés Marcos Esteban2, Shifeng Zhang1

  • 1College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China.

ISA Transactions
|October 15, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces an enhanced disturbance rejection control for test rockets using H-infinity synthesis and equivalent-input-disturbance methods. The approach effectively compensates for disturbances in 3-axis attitude control systems, showing practical engineering applications.

Keywords:
synthesis3-axis attitude controlDisturbance rejection controlEquivalent-input-disturbance (EID)Flight testHardware-in-the-loop simulationMonte-Carlo bias simulation and comparisonTest rocket

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Area of Science:

  • Aerospace Engineering
  • Control Systems Theory

Background:

  • Test rockets are valuable platforms for scientific and educational experiments.
  • Disturbance rejection control is crucial for aircraft control systems.

Purpose of the Study:

  • To present an enhanced disturbance rejection control method for 3-axis attitude control of test rockets.
  • To apply H-infinity synthesis and equivalent-input-disturbance (EID) for improved control system design.

Main Methods:

  • Established an EID system to treat mismatched disturbances as total input disturbances for compensation.
  • Applied H-infinity synthesis for designing a disturbance filter and composite feedback controller.
  • Modeled nonlinear rocket dynamics as linear EID formulations for attitude control.

Main Results:

  • The proposed method was successfully applied to a small solid test rocket's 3-axis attitude controller.
  • Controller design considered the filter and system as a whole for guaranteed stability.
  • Validated through Monte-Carlo simulations, comparison with active disturbance rejection control (ADRC), Hardware-in-the-Loop (HIL) simulation, and flight tests.

Conclusions:

  • The enhanced disturbance rejection control method demonstrates effectiveness for test rocket attitude control.
  • The approach offers excellent performance and practical prospects for engineering applications.
  • Guaranteed system stability without separate controller and filter design was achieved.