Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Control and Cybernetics

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Reducibility condition for nonlinear discrete-time systems: behavioral approach

Bartosiewicz Z., Kotta U., Pawłuszewicz E., Tonso M., Wyrwas M.

Control and Cybernetics

2013

Vol. 42, no. 2

329--346

The paper addresses the problem of reducibility of nonlinear discrete-time systems, described by implicit higher order difference equations where no a priori distinction is made between input and output variables. The reducibility definition is based on the concept of autonomous element. We prove necessary reducibility condition, presented in terms of the left submodule, generated by the row matrix, describing the behavior of the linearized system, over the ring of left difference polynomials. Then the reducibility of the system implies the closedness of the submodule, like in the linear time-invariant case. In the special case, when the variables may be specified as inputs and outputs and the system equations are Niven in the explicit form, the results of this paper yield the known results.

Realization of nonlinear composite systems

Mullari T., Kotta U., Nomm S., Tonso M.

Control and Cybernetics

2006

Vol. 35, no 4

905-921

The paper studies the realization problem for series and parallel connections of nonlinear single-input single-output systems, described by higher order differential equations. Necessary and sufficient conditions are given for the existence of the classical state space realization in both cases. It is proved that post- and parallel compensators are of no help in overcoming non-realizability. Results are illustrated by an example.