International Symposium on Nonlinear Theory and its Applications
Augmented Automatic Choosing Control of Nonlinear Observer Type for Nonlinear Systems with Linear Measurement and Its Application
Hitoshi Takata, Tomohiro Hachino, Kengo Kohama, Toshinori Nawata,
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This paper deals with a feedback control using automatic choosing functions and observer-control design procedure, for nonlinear systems with linear measurement. A constant term which arises from linearization of a nonlinear equation is treated as a coefficient of a stable zero dynamics. A given nonlinear system is linearized piecewise so as to be able to design the linear optimal controllers with observer. By the automatic choosing functions, these controllers are smoothly united into a single nonlinear feedback controller, which is called an augmented automatic choosing control of nonlinear observer type. This controller is applied to improve the transient stability of power systems, whose simulation results show that the new controller enables to expand the stable region well.