【作者】 吴博；

【导师】 关治洪； 钱同惠；

【作者基本信息】 华中科技大学 ， 控制理论与控制工程， 2011， 硕士

【摘要】 无线传感器网络是一种新兴的网络,它由大量价格低廉、功耗低、自组织能力强的传感器节点组成。这种网络具有相当广阔应用前景,在军事、环境监测和保护及医疗卫生等领域已有非常多的应用。目前,无线传感器网络的研究主要集中在分层网络协议、传感器网络管理技术和应用支撑技术这三个方面,对于无线传感器网络控制方面的研究成果还不多。本文是基于控制理论的角度来研究无线传感器网络的问题。首先简要介绍了无线传感器网络的概念、结构特点、研究热点问题及相关研究现状,并且针对本文研究简要介绍了控制理论的一些主要稳定性理论、切换系统的研究方法和不确定性系统的研究方法,以及多传感器网络的数据融合方法。在无线传感器的滤波控制问题中,依据Kalman滤波理论和加权融合方法得到对环境的一个最优观测信号,并通过综合和分析,将无线传感器网络稳定性问题转化为一个带干扰的离散切换系统的稳定性问题,最后通过采用Lyapunov函数方法得到随机切换系统满足H∞控制的充分条件。无线传感器执行器网络是无线传感器控制研究中的一个重要问题,本文在考虑了一个具体的应用实例的条件下,依据分布式结构特点,建立了适当的模型,并通过综合分析,通过设计出适当的控制器,并根据一类不确定性系统H∞控制稳定性定理,得到了一个H∞控制的稳定性条件。最后用仿真实例说明了方法的有效性。最后对全文的工作进行了总结,并对今后的进一步研究和发展方向进行了展望。更多还原

【Abstract】 Wireless sensor networks which is consisted of many sensor nodes which are low-cost, low power consumption, self-organizing ability is a new network. This network has a very broad application prospects in the fields of military, environmental monitoring and protection, and medical and health. Currently, wireless sensor networks mainly focused on three aspects of layered network protocol, sensor network management technology and application of these supporting technologies, and there is little work on the research of the control for wireless sensor networks.In this thesis, the wireless sensor networks have been studied based on the theory of control. Firstly, the concept, the structure characteristic, the hot topic and the current status of research of the wireless sensor networks have been introduced briefly. Secondly, some main stability theory of control theory and the research methods of switching systems and uncertain systems have been shown briefly in the thesis.According to Kalman filtering theory and weighted fusion methods, a optimal observed signal for the environment can be obtained in the filtering control problem of wireless networks. And the stability problem of wireless networks can be transformed to the stability problem of a discrete switching system with disturbance, then the sufficient condition of stochastic switching systems can be controlled by H- infinity was obtained by Lyapunov function.The wireless sensor-actuator network is a key issue in the wireless sensor control. A corresponding model has been established through the characteristic of the distributed structure with a special application being considered. And the controller has been designed via comprehensive analysis. Then a stability condition of H-infinity control has been obtained according to the stability definition of a class of uncertain systems. And the simulation has been given to show the effective of the proposed method. Finally,a summary has been done for all discussions in the thesis. The research works in further study are presented.更多还原