Disturbance gain and bandwidth margins: definitions and application to autopilot design

Author

Davison, D.E. ; Kabamba, P.T. ; Meerkov, S.M.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA

Volume

2

fYear

1997

fDate

4-6 Jun 1997

Firstpage

1109

Abstract

Deals with the notion of disturbance model uncertainty. The disturbance is modeled as the output of a first-order filter which is driven by white noise and whose bandwidth, ω_b, and H ₂-norm, K, are uncertain. An analytical expression for the steady-state output variance as a function of ω_b and K is derived. Several properties of this variance function are given and the notions of disturbance gain margin and disturbance bandwidth margin are introduced. These tools are then applied to the analysis of an altitude hold autopilot system in the presence of turbulence with uncertain turbulence scale

Keywords

aircraft control; atmospheric turbulence; closed loop systems; control system analysis; feedback; robust control; transfer functions; uncertain systems; white noise; H₂-norm; altitude hold autopilot system; autopilot design; disturbance bandwidth margin; disturbance gain margin; disturbance model uncertainty; first-order filter; steady-state output variance; turbulence; variance function; white noise; Analysis of variance; Application software; Bandwidth; Filters; Power measurement; Robust control; Robustness; Steady-state; Transfer functions; White noise;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference, 1997. Proceedings of the 1997

Conference_Location

Albuquerque, NM

ISSN

0743-1619

Print_ISBN

0-7803-3832-4

Type

conf

DOI

10.1109/ACC.1997.609704

Filename

609704