具有量化器的网络控制系统稳定性分析

Stability of Network Control Systems with Quantizer

数字设备硬件性能的提高和网络控制系统的发展使得量化问题成为目前研究的热点。由于网络控制系统具有带宽约束的特点,数据的传输和处理是零传输延迟和无限高精度的这一假定不再合适,有必要对量化对于控制系统性能的影响进行研究。针对考虑量化器的状态反馈镇定系统的模型从非线性的角度研究了量化器对于控制对象状态动态特性的影响。进而推广到考虑量化器的周期通信的网络控制系统模型上。用Matlab/Simulink仿真算例,验证了结论的有效性。

Due to the improvement of digital hardware equipment and development of NCS （networked control system）, Quantization problem research has been focused on at this moment. Particularly in the research of NCS, due to the Bandwidth constraints, it is necessary to study the performance of the control system with quantizer. Seeing the quantizer as nonlinear equipment is used to study the quantization problem. Firstly, control System with quantizer are designed and modeled, the stability of the systems is analyzed with Lyapunov method. And then, we generalized the result to a kind of NCS model called periodic communication NCS model founded by the Antsaklis. And the results are validated in Matlab/Simulink simulation environment.