Details:

Title
Author(s)	Krister Forsman
Type	Technical Report, Misc
Abstract	Some problems within nonlinear control theory are stated and solved using so called Groebner bases from commutative algebra. The first problem is the one of stability and performance robustness of nonlinear systems subject to structured uncertainty. It is assumed that a Lyapunov function is given, and the quality of the solution depends on this Lyapunov function. It is also indicated how the robustness problem can be reinterpreted in different ways, e.g. in terms of controller design. The second problem is the one of finding a differential equation connecting the input and the output of a system starting from a state space description of it. In all cases the nonlinearities are required to be of polynomial type. The methods suggested are illustrated with concrete examples.
Keywords	Nonlinear control systems, commutative algebra, Lyapunov theory, stability robustness, performance robustness, state space equations, input-output equation
File
Language	English
Year	1991
Edition	0
Translation	No
Refereed	No