Title :
A nonlinear state observer based on indefinite Riccati design
Author_Institution :
BMW AG, Munich, Germany
fDate :
Aug. 31 1999-Sept. 3 1999
Abstract :
In this article we propose an observer for continuous-time nonlinear systems. The observer gain is computed by an indefinite Riccati differential equation. We prove that under certain conditions the proposed observer is an exponential observer by choosing an appropriate Lyapunov function. To examine the practical usefulness of the proposed observer we apply it to an induction motor for the estimation of the rotor flux and the angular velocity.
Keywords :
Lyapunov methods; Riccati equations; continuous time systems; control system synthesis; nonlinear control systems; Lyapunov function; angular velocity; continuous-time nonlinear systems; exponential observer; indefinite Riccati design; induction motor; nonlinear state observer; rotor flux estimation; Differential equations; Estimation error; Kalman filters; Lyapunov methods; Mathematical model; Nonlinear systems; Observers; Nonlinear observer; Riccati differential equation; extended Kalman filter;
Conference_Titel :
Control Conference (ECC), 1999 European
Conference_Location :
Karlsruhe
Print_ISBN :
978-3-9524173-5-5