Optimal estimation for systems with multiplicative noises, random delays and multiple packet dropouts

Optimal estimation for systems with multiplicative noises, random delays and multiple packet dropouts
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具有乘性噪声、随机延迟和多个数据包丢失的系统的最佳估计

DOI:
10.1049/iet-spr.2015.0541
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发表时间:
2016-04
影响因子:
1.7
通讯作者:
Chu, Dongsheng
Chu, Dongsheng
中科院分区:
工程技术4区
文献类型:
--
作者:
Li, Mingyang;Zhang, Ling;Chu, Dongsheng

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本文研究了具有乘性噪声、一步随机时延和多丢包的网络控制系统的最优估计问题。传感器-估计器和传感器-致动器通道都受到MN的影响。一步随机延迟和数据包丢失的特点是由一系列的伯努利变量。通过状态增广,将信道中的随机环境转化为随机参数,并利用投影理论导出最优估计器。对于没有MN,随机延迟或数据包丢失的系统,相应的估计器可以作为所提出的算法的特殊情况下导出。然后给出了稳态估计量存在的一个充分条件。数值算例验证了所提出的估计算法的有效性。
In this research, the optimal estimation for networked control system with multiplicative noises (MN), one-step random delays and multiple packet dropouts is studied. Both the sensor-to-estimator and controller-to-actuator channels are affected by MN. The one-step random delays and packet dropouts are characterised by a series of Bernoulli variables. By state augmentation, the random circumstances in channels are transformed into random parameters, and the optimal estimators are derived utilising projection theory. For systems without MN, random delays or packet dropouts, the corresponding estimators can be derived as particular cases of the proposed algorithm. Then a sufficient existence condition of steady-state estimators is derived. Some numerical examples are given to validate the proposed estimation algorithms.
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