Detectability and observer design for switched differential-algebraic equations

Detectability and observer design for switched differential-algebraic equations
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切换微分代数方程的可检测性和观测器设计

DOI:
10.1016/j.automatica.2018.10.043
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发表时间:
2019
期刊:
ArXiv
影响因子:
--
通讯作者:
S. Trenn
S. Trenn
中科院分区:
--
文献类型:
--
作者:
A. Tanwani;S. Trenn

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本文研究了切换线性微分代数方程(DAE)的可检测性及其在观测器综合中的应用,该观测器能产生渐近收敛的状态估计。将可检测性等同于零输出约束状态轨迹的渐近稳定性,并基于我们在区间可观测性方面的工作,我们提出了区间可检测性的概念:如果系统的输出在一个区间上被约束为同为零,则相应状态轨迹的范数在该区间的末尾按一定的因子缩小。条件下,区间明智的可检测性导致零输出约束状态轨迹的渐近稳定性。在设计状态估计器的应用。将状态分解为可观测和不可观测的分量,我们证明了如果系统的可观测分量被适当且持续地重置,则在区间可检测性假设下,估计误差渐近收敛到零。
This paper studies detectability for switched linear differential–algebraic equations (DAEs) and its application to the synthesis of observers, which generate asymptotically converging state estimates. Equating detectability to asymptotic stability of zero-output-constrained state trajectories, and building on our work on interval-wise observability, we propose the notion of interval-wise detectability: If the output of the system is constrained to be identically zero over an interval, then the norm of the corresponding state trajectories scales down by a certain factor at the end of that interval. Conditions are provided under which the interval-wise detectability leads to asymptotic stability of zero-output-constrained state trajectories. An application is demonstrated in designing state estimators. Decomposing the state into observable and unobservable components, we show that if the observable component of the system is reset appropriately and persistently, then the estimation error converges to zero asymptotically under the interval-wise detectability assumption.
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发表时间: 2012-12
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