期刊名称：International Journal of Computer Science and Network Security
印刷版ISSN：1738-7906
出版年度：2019
卷号：19
期号：5
页码：202-209
出版社：International Journal of Computer Science and Network Security
摘要：In this paper, a synthesis approach of adaptive observer adjusted for linear continuous delayed state and input systems is proposed. The treated system is exposed to unknown input. The delay is assumed to be variable and the unknown input is assumed to be constant. The contribution of this paper is to suggest a new adaptive observer synthesis methodology for an irrigation canal which represents delayed state and input system when unknown inputs are present. The key step is to use an easy method for the design of this observer which is the coupling of a state observer and an improved adaptation law employed to estimate the unknown parameters and the states of the system as well. The conditions for the presence of this observer are cleared. By applying information on asymptotic stability, we can propose methodology for synthesizing a linear adaptive observer to ensure the global uniform asymptotic convergence of the error’s estimation. According to Lyapunov stability approach, the stability conditions are resolved with linear matrix inequalities (LMIs) concept. Simulations results illustrate the design approach and the effectiveness of obtained stability conditions and also have a good robustness to unknown inputs. The method of observer design is applied to irrigation canal to prove the validity of the found results.
关键词：Adaptive state observer -Lyapunov stabilty LMIs technique-Unknown input-Irrigation Canal
