대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 1988년도 전기.전자공학 학술대회 논문집
- /
- Pages.898-901
- /
- 1988
안정한 적응관측기법에 의한 제어계의 상태추정
Stable adaptive observer for state Identification in control system
- Bang, S.Y. (Dep. of Electrical Engineering Kwang Woon University) ;
- Chun, S.Y. (Dep. of Electrical Engineering Kwang Woon University) ;
- Yim, W.Y. (Dep. of Electrical Engineering Kwang Woon University)
- 발행 : 1988.07.01
초록
Up to now, using adaptive control method, Identification deals with system whose entire state variables and prameters are accessible for measurement. In practical situations, all the state variables cannot be measured and it is impossible to directly apply since the parameters of the system are unknown. Therefore, in this paper, using only input-output data, such a model of the system is not available since the parameters of the system are unknown. this leads to the concept of an adptive observer in which both the parameters and the state variable of the system are identified simultaniously. Lyapunov's direct method and Kalman-Yakubovich (K-Y) lemma are employed to ensure the stability of this schemes. The feature is that the signal and adaptive gain which is generated from filter is imposed upon feedback vector and then state variables and the unknown parameters can be identified. To show the usefulness of the proposed schemes, computer simulation result of unknown second-order system shows the effectiveness of the proposed schems.
키워드