Multirate eigenstructure assignment with application to an aircraft lateral SAS/Autopilot

Author

Piou, J.E. ; Sobel, K.M. ; Shapiro, E.Y.

Author_Institution

Dept. of Electr. Eng., City Coll. of New York, NY, USA

Volume

3

fYear

1994

fDate

29 June-1 July 1994

Firstpage

2496

Abstract

A result for multirate state feedback with fast and slow feedback loops is extended to output feedback. This multirate feedback structure is combined with eigenstructure assignment to design a lateral stability augmentation system operating at 50 Hz and a bank angle autopilot operating at 10 Hz for the linearized dynamics of the L-1011 aircraft. Gain suppression is used to reduce the number of gains from twelve to seven. A hybrid simulation with the continuous aircraft dynamics and digital multirate controller demonstrates the excellent intersampling behavior both with the autopilot on and with the autopilot off.

Keywords

aircraft control; digital control; eigenstructure assignment; state feedback; L-1011 aircraft; aircraft lateral SAS/autopilot; bank angle autopilot; continuous aircraft dynamics; digital multirate controller; gain suppression; hybrid simulation; intersampling behavior; lateral stability augmentation system; linearized dynamics; multirate eigenstructure assignment; multirate state feedback; output feedback; Aerospace control; Aircraft propulsion; Cities and towns; Control systems; Digital control; Feedback loop; Output feedback; Stability; State feedback; Synthetic aperture sonar;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference, 1994

Print_ISBN

0-7803-1783-1

Type

conf

DOI

10.1109/ACC.1994.735008

Filename

735008