Robert Frank Stengel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


Simplified structures for longitudinal control laws that reduce an aircraft's response to the strong head-tailwind and downdraft variations associated with microbursts are presented. They are based on non-zero-set-point linear-quadratic regulators that command throttle setting and angle of attack as functions of velocity and flight path angle, and they can incorporate direct measurements of the wind profile if available. Selection of cost functions to be minimized by feedback control has been aided by a prior study of classical control laws and exact non-linear-optimal flight paths through realistic microburst wind profiles. The resulting optimal control laws have an adaptive, dual-mode structure that can be implemented either in flight-director logic or in an autopilot.

Original languageEnglish (US)
Title of host publicationCongress of the International Council of the Aeronautical Sciences
EditorsP. Santini, R. Staufenbiel
Number of pages8
StatePublished - Dec 1 1986

Publication series

NameCongress of the International Council of the Aeronautical Sciences

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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