Security‐guaranteed filtering for discrete‐time stochastic delayed systems with randomly occurring sensor saturations and deception attacks
Security‐guaranteed filtering for discrete‐time stochastic delayed systems with randomly occurring sensor saturations and deception attacks
复制标题
DOI：
10.1002/rnc.3623
复制
发表时间：
2017-05
影响因子：
3.9
通讯作者：
Dong Wang;Zidong Wang;Bo Shen;F. Alsaadi
中科院分区：
文献类型：
--
作者：
Dong Wang;Zidong Wang;Bo Shen;F. Alsaadi
研究了一类具有随机传感器饱和（ross）和随机欺骗攻击（roda）的非线性随机离散时滞系统的安全保证滤波问题。系统的非线性满足扇区有界条件，时变时滞在给定下界和上界下是未知的。提出了一种新的测量输出模型来同时反映ross和roda。从噪声强度、假信号的能量界、系统初始状态的能量和期望的安全度等方面对安全等级提出了新的定义。我们的目标是设计这样一个过滤器，在存在ross和roda的情况下，过滤误差动态达到规定的安全级别。利用随机分析技术，首先导出了保证滤波误差系统具有期望安全级别的充分条件，然后通过求解非线性约束下的线性矩阵不等式来设计滤波器增益。最后，通过数值算例验证了所提滤波方案的可行性。版权所有©2016 John Wiley & Sons， Ltd。
In this paper, the security‐guaranteed filtering problem is studied for a class of nonlinear stochastic discrete time‐delay systems with randomly occurring sensor saturations (ROSSs) and randomly occurring deception attacks (RODAs). The nonlinearities in systems satisfy the sector‐bounded conditions, and the time‐varying delays are unknown with given lower and upper bounds. A novel measurement output model is proposed to reflect both the ROSSs and the RODAs. A new definition is put forward on the security level with respect to the noise intensity, the energy bound of the false signals, the energy of the initial system state, and the desired security degree. We aim at designing a filter such that, in the presence of ROSSs and RODAs, the filtering error dynamics achieves the prescribed level of security. By using the stochastic analysis techniques, a sufficient condition is first derived under which the filtering error system is guaranteed to have the desired security level, and then, the filter gain is designed by solving a linear matrix inequality with nonlinear constraints. Finally, a numerical example is provided to demonstrate the feasibility of the proposed filtering scheme. Copyright © 2016 John Wiley & Sons, Ltd.