【作者】 吴迎年；

【导师】 张建华；

【作者基本信息】 华北电力大学（北京） ， 控制理论与控制工程， 2004， 硕士

【摘要】 本文对通过 TCP/IP 协议通信的网络控制系统进行了分析和研究。首先，对网络时延进行了测试和分析，给出了对时延进行在线计算和预测的方法；其次，对网络时延不超过一个采样周期的网络控制系统进行了研究，考虑时延建立了网络控制系统模型，基于该模型设计了 PI-LQ 最优控制器，并给出了时延为不确定时的控制策略；接着，对网络时延超过一个采样周期的网络控制系统进行了研究，设计了动态 PI-Fuzzy控制器，用遗传算法得到不同网络时延下的最佳参数库，在网络时延发生变化时利用最佳参数库动态调整控制器参数，使系统稳定并达到一定的性能指标要求；最后设计开发了运行在 MATLAB/Simulink 环境下，基于 TCP/IP协议 通信的网络控制系统仿真环境。更多还原

【Abstract】 The networked control systems (NCS) communicating with TCP/IP protocol is sys-tematically analyzed and studied in this paper. Firstly, network time-delay is measuredand analyzed. A method of on-line computing and predicting time-delay is proposed.Secondly, the networked control systems whose network time-delay are less than one sam-ple period is analyzed. Considering network time-delay, the NCS model is obtained. ThePI-LQ optimal controller is given based on the NCS model and the control strategy is pro-posed when time-delay is uncertain. Then, the networked control systems whose networktime-delay is larger than one sample period are analyzed.The dynamic fuzzy controller isdesigned and the optimal parameter library corresponding to di?erent network time-delayis obtained by genetic algorithm. While network time-delay is changing, the controllerparameters can be tuned dynamically with the aid of the optimal parameter library. Itcan ensure the stability and the performance of the systems. Finally, the simulation pro-gram of networked control systems communicating with TCP/IP protocol is developedwhich can run in MATLAB/Simulink.更多还原