Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2006.10c
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- Pages.220-222
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- 2006
Robust Intelligent Digital Redesign
강인 지능형 디지털 재설계 방안 연구
- Published : 2006.10.27
Abstract
This paper presents intelligent digital redesign method of global approach for hybrid state space fuzzy-model-based controllers. For effectiveness and stabilization of continuous-time uncertain nonlinear systems under discrete-time controller, Takagi-Sugeno(TS) fuzzy model is used to represent the complex system. And global approach design problems viewed as a convex optimization problem that we minimize the error of the norm bounds between nonlinearly interpolated lineal operators to be matched. Also, by using the bilinear and inverse bilinear approximation method, we analyzed nonlinear system's uncertain parts more precisely. When a sampling period is sufficiently small, the conversion of a continuous-time structured uncertain nonlinear system to an equivalent discrete-time system have proper reason. Sufficiently conditions for the global state-matching of the digitally controlled system are formulated in terms of linear matrix inequalities (LMIs). Finally, a T-S fuzzy model for the chaotic Lorentz system is used as an example to guarantee the stability and effectiveness of the proposed method.
Keywords
- Chaotic Lorentz system;
- Intelligent Digital Redesign;
- Takagi-Sugeno Fuzzy System;
- Linear Matrix Inequality (LMI);
- Bilinear and Inverse Bilinear approximation