时延与丢包情形下的网络控制系统量化反馈镇定

feedback control of networked control systems with delay and data packet dropout

摘要:

网络控制系统是通过实时网络来形成闭环反馈的控制系统。网络的介入会带来许多不确定因素，包括网络诱导时延和数据包丢失以及量化误差，它们会影响系统的稳定性，严重时甚至会导致系统失稳。本文针对短时延网络控制系统，考虑传感器-控制器和控制器-执行器两个通道都存在数据包丢失，在传感器到控制器端设立量化器，将系统建模为一个异步动态系统，利用异步动态系统指数稳定性理论、线性矩阵不等式工具分析了闭环系统稳定性，并基于MATLAB软件的线性矩阵不等式(LMI)工具箱实验仿真进行有效性验证，结果证明了方案的可行性，最后给出控制器参数的设计方法。

Abstract:

Feedback control systems wherein the control loops through a real-time network are called networked control system. Network intervention brings many uncertain factors, such as network induced delay, data packet dropout and quantization error, which will affect the stability of the system, and even lead to the instability of the system. As for delay network control system with quantizer, sensor-to-controller channel and controller-to-actuator channel both have data packet dropout, and the system is modeled as an asynchronous dynamic system. The stability of the system is analyzed by using the exponential stability theory of asynchronous dynamic system and linear matrix inequality toolbox. The numerical example is simulated by Linear Matrix Inequality(LMI) toolbox of MATLAB software, and the feasibility of the scheme is verified. Finally, the design method of controller parameters is presented.