广义异步网络控制系统的建模与分析  

Modeling and analysis of descriptor asynchronous networked control systems

作　　者：樊金荣[1] 方华京[1] 

机构地区：[1]华中科技大学控制科学与工程系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2009年第8期39-42,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(60574088)

摘　　要：对网络控制系统(NCS)中传感器和控制器采用时钟驱动时,二者采样周期不相同的异步采样特性进行了分析.针对采样周期之比为有理数的情形,运用"提升(Shifting)"技术,将广义异步网络控制系统转化为多速率采样系统,并根据网络中短时延的不同情形建立了相应的离散状态空间模型.在此基础上,给出了该系统的可控性和可观性的充分条件,仿真结果表明了此模型的合理性.The analysis and modeling of descriptor asynchronous networked control systems were focused. The characters of the asynchronous networked control systems with different clock cycles in the presence of short time delays were analyzed. When the ratio of the sampling periods is rational number, the descriptor asynchronous system can be transformed into a multi-rate sampled system by the shifting technology. Under the different delays, the discrete state-space models were formed. Based on the models, the sufficient condition of the controllability and observability was achieved. The simulation result shows that the model was reasonable for the asynchronous networked control system.

关 键 词：网络控制系统 异步 时延 时钟驱动 事件驱动 提升 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]