L1 adaptive control for switching reference systems: Application to flight control

Steven Snyder, Pan Zhao, Naira Hovakimyan

Research output: Contribution to journalConference articlepeer-review


This paper presents a framework for design and analysis of an L1 adaptive controller with switching reference systems. Use of switching reference systems allows the desired behavior to be scheduled across the operating envelope, which is often required in aerospace applications. The analysis uses a switched reference system that assumes perfect knowledge of uncertainties and uses corresponding non-adaptive controller. Provided that this switched reference system is stable, it is shown that the closed-loop system with unknown parameters and disturbances and the L1 adaptive controller can behave arbitrarily close to this reference system. Simulations of the short period dynamics of a transport class aircraft during the approach phase illustrate the theoretical results.

Original languageEnglish (US)
Pages (from-to)718-723
Number of pages6
Issue number16
StatePublished - Sep 2019
Event11th IFAC Symposium on Nonlinear Control Systems, NOLCOS 2019 - Vienna, Austria
Duration: Sep 4 2019Sep 6 2019


  • Adaptive control
  • Control system analysis
  • Flight control
  • Switching system

ASJC Scopus subject areas

  • Control and Systems Engineering

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