Boundary Constrained Control of Flexible String Systems Subject to Disturbances

Zhijie Liu, Zhijia Zhao, Choon Ki Ahn

Research output: Contribution to journalArticlepeer-review

76 Citations (Scopus)


This brief concentrates on controller design for flexible string systems subjected to external disturbances, input constraints, and state constraints. The hyperbolic barrier Lyapunov function and auxiliary systems are adopted to develop boundary constrained control with a disturbance observer for restraining vibrations, eliminating input and state constraints, and tackling external disturbances. The suggested control can ensure the input and state constraints and achieve asymptotic stability in the controlled system. With appropriate design parameters, the simulation results obtained verify the control performance.

Original languageEnglish
Article number8651373
Pages (from-to)112-116
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Issue number1
Publication statusPublished - 2020 Jan


  • Boundary control
  • disturbance observer
  • input constraints
  • state constraints
  • vibration control

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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