Multirate Sampled-Data Observer Design Based on a Continuous-Time Design
Multirate Sampled-Data Observer Design Based on a Continuous-Time Design
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DOI：
10.1109/tac.2019.2929295
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发表时间：
2019-07
影响因子：
6.8
通讯作者：
Chen Ling;C. Kravaris
中科院分区：
文献类型：
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作者：
Chen Ling;C. Kravaris
针对非线性系统，提出了一种异步采样下的多采样率观测器。建议的多速率观测器是基于一个连续时间的设计加上样本间输出预测的采样测量。多采样率观测器的采样数据系统形成了一个混合系统，它示出了整个系统的误差动态是输入输出稳定的测量误差，通过应用Karafyllis江矢量小增益定理。这种采样数据设计还提供了相对于采样时间表中的扰动的鲁棒性。通过线性系统和非线性间歇反应器的例子，所提出的方法进行评估。
A multirate sampled-data observer for nonlinear systems under asynchronous sampling is developed in this paper. The proposed multirate observer is based on a continuous-time design coupled with intersample output predictors for the sampled measurements. The sampled-data system with the multirate observer forms a hybrid system and it is shown that the error dynamics of the overall system is input-to-output stable with respect to measurement errors, by applying the Karafyllis–Jiang vector small-gain theorem. This sampled-data design also offers robustness with respect to perturbations in the sampling schedule. The proposed method is evaluated through linear systems and a nonlinear batch reactor example.