This paper develops an L1 adaptive output feedback controller for a class of underactuated multi-input multi-output (MIMO) systems. The proposed approach is applied as an augmentation of an existing three-loop autopilot. The adaptive scheme is introduced to compensate for the uncertainties and to recover the nominal performance. Stability and performance, both in transient and steady state, are analyzed. Nonlinear simulation results demonstrate the performance of the augmented control system.

Original languageEnglish (US)
Pages (from-to)680-692
Number of pages13
JournalIEEE Transactions on Aerospace and Electronic Systems
Issue number2
StatePublished - Apr 2018


  • Adaptive control
  • adaptive systems
  • aerospace
  • robust adaptive control
  • three-loop missile autopilot

ASJC Scopus subject areas

  • Aerospace Engineering
  • Electrical and Electronic Engineering


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