Number: Control 81/96
Author(s): NURGES, Ülo.
Title: Robust control via convex approximation of the stability region. 6 p.
Language: English
Keywords: robust stability * robust control * discrete-time systems
Availability:
ftp://ftp.ioc.ee/pub/reports/control/co81_96.ps.Z
ABSTRACT. A Schur invariant transform on the coefficient space of polynomials
is used to obtain a sufficient stability condition in shape of simplex. The
order of polynomials could be increased step by step starting from some low
order stable simplex. A stability measure is introduced as a minimal distance
between the extreme points of interval system and the surface of the stable
simplex. A straight-forward robust controller design procedure is proposed for
interval plants. Some low order examples are given.