This paper proposed a design method for delay-dependent robust H-infinity filter of linear systems with uncertainty and time-varying interval delay.The proposed method was shown to be much simpler than existing ones while giving significant improvement to the existing results.The key step in the method was to construct a special type of Lyapunov functional for the filter design problem.Unlike the existing techniques,the proposed method employed neither free weighting matrices nor any model transformation,leading to reduced computational demand as well as improved performance.Numerical examples were given to demonstrate the effectiveness of the proposed method.
An H∞ filter design for linear time delay system with randomly varying sensor delay is investigated.The delay considered here is assumed to satisfy a certain stochastic characteristic.A stochastic variable satisfying Bernoulli random binary distribution is introduced and a new system model is established by employing the measurements with random delay.By using the linear matrix inequality(LMI) technique,sufficient conditions are derived for ensuring the mean-square stochastic stability of the filtering error systems and guaranteeing a prescribed H∞ filtering performance.Finally,a numerical example is given to demonstrate the effectiveness of the proposed approach.
针对网络控制系统(NCS)中网络带宽等网络资源受限制的情况,对目前NCS信息调度的研究现状进行了综述.首先介绍了NCS的背景和基本概念,阐述了网络的引入带来的各种影响.然后研究了NCS的动态特性,对现有的信息调度策略和调度方法进行了总结与分析.进一步分析了在资源受限时如何进行有效的信息调度以保证较高的网络服务质量QoS(Quality ofService)和较好的控制品质QoC(Quality of Control),对一些控制与调度协同设计的研究进行了说明.最后,结合前面的研究分析,讨论了该领域今后进一步的研究方向.
