L 1 adaptive sampled-data control for uncertain multi-input multi-output systems

Hamidreza Jafarnejadsani, Hanmin Lee, Naira Hovakimyan

Research output: Contribution to journalArticle

Abstract

This paper develops a sampled-data (SD) controller for uncertain multi-input multi-output (MIMO) systems, possibly with non-minimum phase zeros, using the L 1 adaptive control architecture. The proposed controller compensates for disturbances and uncertainties within the bandwidth of a low-pass filter. Sufficient conditions for robust stability are obtained for the closed-loop system with SD controller, where the input/output signals are held constant over a sampling period. It is shown that the hybrid closed-loop system can recover the performance of a continuous-time reference system as the sampling time of the SD controller tends to zero. Simulation examples are provided to validate the theoretical findings.

Original languageEnglish (US)
Pages (from-to)346-353
Number of pages8
JournalAutomatica
Volume103
DOIs
StatePublished - May 2019

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Controllers
Closed loop systems
Sampling
Low pass filters
Bandwidth
Uncertainty
Robust stability

Keywords

  • Digital controller
  • Disturbance compensation
  • L adaptive sampled-data control
  • Multi-input multi-output system
  • Non-minimum-phase system
  • Output-feedback

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Cite this

L 1 adaptive sampled-data control for uncertain multi-input multi-output systems . / Jafarnejadsani, Hamidreza; Lee, Hanmin; Hovakimyan, Naira.

In: Automatica, Vol. 103, 05.2019, p. 346-353.

Research output: Contribution to journalArticle

Jafarnejadsani, Hamidreza ; Lee, Hanmin ; Hovakimyan, Naira. / L 1 adaptive sampled-data control for uncertain multi-input multi-output systems In: Automatica. 2019 ; Vol. 103. pp. 346-353.
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