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研究了一类具有IEEE802.11b无线网络通道特性和时变特性的离散系统镇定及数值仿真问题。分别建立了刻画IEEE802.11b无线网络通道时滞的逆高斯分布模型和系统时变特性的不确定参数模型。设计了基于模型的状态反馈控制器以补偿网络延时和时变性对系统的影响。同时分析了离散时变网络控制系统的随机稳定性,并给出了线性矩阵不等式形式的控制器求解条件。通过数值仿真分析,验证了所提方法的有效性。
A class of discrete-time system stabilization and numerical simulation problems with IEEE802.11b wireless network channel characteristics and time-varying characteristics are studied. We establish respectively the inverse Gaussian distribution model and the uncertain parameter model of time-varying characteristics of IEEE802.11b wireless network channel. A model-based state feedback controller is designed to compensate for the impact of network delay and time-varying on the system. At the same time, the stochastic stability of discrete time-varying networked control system is analyzed and the controller solving conditions in the form of linear matrix inequalities are given. Through the numerical simulation analysis, the effectiveness of the proposed method is verified.