Observer-based sliding mode control for a class of discrete systems via delta operator approach

Observer-based sliding mode control for a class of discrete systems via delta operator approach
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基于观测器的 Delta 算子方法对一类离散系统进行滑模控制

DOI:
10.1016/j.jfranklin.2010.05.003
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发表时间:
2010-09
影响因子:
4.1
通讯作者:
Shi, Peng
Shi, Peng
中科院分区:
计算机科学3区
文献类型:
--
作者:
Yang, Hongjiu;Xia, Yuanqing;Shi, Peng

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研究了一类具有非线性外扰的不确定Delta算子系统的滑模控制问题。利用李雅普诺夫理论,在δ域内得到了滑模系统鲁棒稳定性的一个新条件。基于所设计的滑模观测器,采用滑模控制理论结合趋近律技术设计了滑模控制器。对于由观测器动态和状态估计误差动态组成的闭环系统,也讨论了鲁棒渐近稳定性问题。此外,还分别在状态估计空间和估计误差空间研究了滑动面的可达性。最后通过数值算例验证了该方法的可行性和有效性。
In this paper, an observer-based sliding mode control (SMC) problem is investigated for a class of uncertain delta operator systems with nonlinear exogenous disturbance. A novel robust stability condition is obtained for a sliding mode dynamics by using Lyapunov theory in delta domain. Based on a designed sliding mode observer, a sliding mode controller is synthesized by employing SMC theory combined with reaching law technique. The robust asymptotical stability problem is also discussed for the closed-loop system composed of the observer dynamics and the state estimation error dynamics. Furthermore, the reachability of sliding surfaces is also investigated in state-estimate space and estimation error space, respectively. Finally, a numerical example is given to illustrate the feasibility and effectiveness of the developed method.
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