A procedure of upgrading a linear observer to homogeneous (nonlinear) one is proposed and validated by experiment. The nonlinear design based on the concept geometric homogeneity. simple developed apply parameters provided observer, which potential for many applications improve their performance. saturation function introduced guarantee improvement estimation quality. Finally theoretical result...

A new observer, namely a cascade observer, for a general class of nonlinear SISO systems was presented by the authors [1]. Inspired by but different from a highgain observer, the cascade observer features a cascade structure and adaptive observer gains. In doing so the cascade observer attempts to overcome some of the typical problems that may pose to a high-gain observer. Based on the cascade ...

This paper present a new advanced control algorithm based on continuous minimization of predicted tracking errors, to achieve torque, rotor speed and rotor flux amplitude tracking objectives. This algorithm called a new Adaptive Nonlinear Predictive Control to induction motor drive uses a combination of the adaptive observer for rotor flux and Cascaded Nonlinear Predictive Control technique. Th...

This paper investigates observer design problem for a large class of nonlinear singular systems with multiple outputs. We firstly regularize the singular system by injecting the derivative of outputs into the system. Then differential geometric method is applied to transform the regularized system into a simple normal form, for which a Luenberger-like observer is proposed.

The composite method of the flux observer and reduced order speed observer and its design procedure for a nonlinear dynamic system is presented. The traditional approach with flux and speed observer and derive six order nonlinear model that describes motor model in field oriented coordinates. The model takes into the error in flux estimation. For flux regulation traditional PI controllers are u...