带未知输入的事件触发学生t滤波设计  

Design of event-triggered student t filter with unknown input

作　　者：杜涛 星艳 张洁 DU Tao;XING Yan;ZHANG Jie(School of Information Science and Technology,North China University of Technology,Beijing 100144,China)

机构地区：[1]北方工业大学信息工程学院,北京100144

出　　处：《扬州大学学报（自然科学版）》2020年第6期39-44,共6页Journal of Yangzhou University：Natural Science Edition

基　　金：国家自然科学基金资助项目(61703006);北京市优秀人才培养资助青年骨干个人项目(2017000020124G027);北京市教委科研计划资助项目(KM201810009001).

摘　　要：针对一类同时含有未知输入和厚尾分布噪声的网络化系统状态估计问题,提出基于事件触发的学生t滤波方法以实现状态和未知输入的同时估计.首先,为节省通信和计算资源,设计了基于量测阈值条件判断的事件触发通讯机制;其次,利用学生t分布表征厚尾分布的噪声模型;最后,设计三步迭代滤波方法同时估计未知输入和状态,并分析滤波估计误差的有界性.仿真实例验证了所提方法的有效性.For the state estimation of networked systems with unknown inputs and heavy-tailed noise,a class of event-triggered student's t filter is designed whichcan be used to estimate the state and unknown input simultaneously To save communicationresource and release computing burden,an event-triggered communication mechanism based on measurement threshold condition is introduced.The heavy-tailed noise is approximated by student's t distribution,a three-step iterative filter is designed to estimate unknowninput and state simultaneously,and the boundedness of filtering estimation error is given.Simulation is given to verify the effectiveness ofthe proposed method.

关 键 词：事件触发机制 学生t分布 未知输入 随机稳定性 

分 类 号：TP273.3[自动化与计算机技术—检测技术与自动化装置]