1,721,055 research outputs found
Canonical observer forms for multi-output systems up to coordinate and output transformations in discrete time
No full textIn the present paper the problem of equivalence under coordinate changes and output transformations to observer canonical forms is addressed in discrete time for multi-output systems. Necessary and sufficient conditions are given for local equivalence to this form which yields a straightforward observer design with linear error dynamics. (C) 2009 Elsevier Ltd. All rights reserved
On the discrete-time normal form
No full textNecessary and sufficient conditions under which the discrete-time normal form exists are set both in geometric and in algebraic frameworks, leading to equivalent conditions. The results are therefore extended to generic nonlinear nonaffine continuous-time systems
On the problem of feedback linearization
No full textThe paper studies and solves in a geometric framework the problem of partial feedback linearization for discrete-time dynamics. An algorithm for computing the largest linearizable subsystem is proposed. This approach can be considered as dual to the one already proposed in literature in an algebraic context
Nonlinear decoupling with stability via static state feedback for a class of discrete-time systems
No full textSan Diego - CA - US
State estimation for two output systems in discrete time
No full textThe paper deals with the equivalence under coordinates change and output transformation to an observer canonical form for discrete-time systems with two outputs. Necessary and sufficient conditions for local equivalence are given. Copyright © 2007 IFAC
Discrete-time versus hybrid systems
No full textThe present paper investigates the behaviour of nonlinear discrete-time dynamics over several steps as a particular case of multi-input dynamics. Introducing for these dynamics a differential representation with jumps, it is shown that the input-to-state or input-to-output behaviours can be represented as suitable compositions of exponential series. Some benefits of these representations are discussed for representing multirate sampled dynamics and hybrid systems
Nonlinear torque control for high power induction motors with digital implementation
No full textThe paper deals with torque control of induction motors. A nonlinear control design solving an instantaneous high power demand is proposed while maintaining the stability of the filter which is located between the converter and the power supply line. A continuous time solution is proposed as the nominal solution of a more accurate digital design. Simulation results are discussed. © 2011 IFAC
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