Title :
PIM digital redesign method and its application to the design of a digital flight controller
Author :
Ieko, T. ; Ochi, Y. ; Kanai, E. ; Hori, N.
Author_Institution :
Dept. of Aerosp. Eng., Nat. Defense Acad., Yokosuka, Japan
Abstract :
In the digital redesign approach considering the closed-loop characteristics of the underlying continuous-time (CT) control system, the plant input mapping (PIM) method has previously been proposed based on the plant input transfer function (PITF) discretized by the matched pole-zero model. The authors have subsequently proposed the modified algorithm of this method using the standard H∞ problem for redesigning into an one-degree-of-freedom (1-DOF) digital control system, and the discretization method of the PITF utilizing the inter-sample responses of the step invariance model for redesigning the multi-input multi-output (MIMO) CT control system. This paper presents its extension to the redesign for the two-degree-of-freedom (2-DOF) CT control system. The simulation studies are performed for the redesign of a digital CCV flight control system to illustrate the effectiveness of the proposed method
Keywords :
H∞ control; MIMO systems; aircraft control; closed loop systems; control system synthesis; digital control; multivariable control systems; poles and zeros; transfer functions; 1-d.o.f. digital control system; 2-d.o.f. control system; MIMO control system; PIM digital redesign method; PITF; closed-loop characteristics; digital CCV flight control system; digital flight controller redesign; inter-sample responses; matched pole-zero model; plant input mapping; plant input transfer function; standard H∞ problem; step invariance model; underlying continuous-time control system; Aerospace control; Control system synthesis; Control systems; Digital control; MIMO; Mechanical engineering; Open loop systems; Sampling methods; Stability; Transfer functions;
Conference_Titel :
SICE '95. Proceedings of the 34th SICE Annual Conference. International Session Papers
Conference_Location :
Hokkaido
Print_ISBN :
0-7803-2781-0
DOI :
10.1109/SICE.1995.526731
