Simultaneous Estimation of the State, Unknown Input, and Output Disturbance in Discrete-Time Linear Systems
Simultaneous Estimation of the State, Unknown Input, and Output Disturbance in Discrete-Time Linear Systems
复制标题
离散时间线性系统中状态、未知输入和输出扰动的同时估计
DOI：
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发表时间：
2021
影响因子：
6.8
通讯作者：
S. Żak
中科院分区：
文献类型：
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作者：
Badriah Alenezi;Mukai Zhang;S. Hui;S. Żak
针对离散时间线性系统受有界未知输入和输出扰动的情况，提出了一种状态观测器和未知输入和输出扰动估计器。给出了状态观测器和干扰估计器存在的充要条件。与强观察者的Hautus的关系进行了研究。在给定的性能指标下，保证了系统的状态、未知输入和输出扰动估计误差的ellinfty稳定性.状态观测器和干扰估计器的设计是以线性矩阵不等式的形式给出的。所提出的估计器可以应用于检测控制器和执行器之间以及植物传感器和控制器之间的通信信道上的对抗性攻击。
A state observer and unknown input and output disturbance estimators are proposed for discrete-time linear systems corrupted by bounded unknown inputs and output disturbances. Necessary and sufficient conditions for the existence of the state observer and disturbance estimators are given. Relationships with the strong observer of Hautus are investigated. The state, unknown input, and output disturbance estimation errors are guaranteed to be $ell _{infty }$-stable with prescribed performance level. The design of the state observer and disturbance estimators are given in terms of linear matrix inequalities. The proposed estimators can be applied to detect adversarial attacks on the communication channels between the controller and actuators and between the plant sensors and the controller.