基于信号差值死区调度的无线网络控制系统H_∞控制

H_∞control of wireless networked control systems with signal difference-based deadband scheduling

首先针对无线网络控制系统(WiNCS)中网络带宽有限、节点能量有限和网络冲突概率高的特点,在传感器端和控制器端设置基于信号差值的传输死区,以减少网络冲突和节点能耗;然后基于传输死区建立包含时延区间概率分布信息和参数不确定性的WiNCS模型,并设计了H_∞控制器;最后基于真实无线网络和模拟被控对象进行半实物仿真实验,结果表明所提出的方法在保证系统渐近稳定的基础上可以明显地降低传感器和控制器的网络流量。

Considering the characteristics in wireless networked control systems（WiNCS）, limited network bandwidth, limited node energy and high network collision probability, the Signal difference-based transmission deadband is set up in sensors and controllers to reduce network collision and node energy consumption. Then, with the consideration of the probability distribution of delay in some intervals and parametric uncertainties, a model of WiNCS is established based on transmission deadband, and the H∞ controller is designed. Results of the .semi-physical simulative experiments with real wireless network and simulative controlled plant show that the network traffic of sensors and controllers is reduced obviously by using the proposed approach on the basis of the system asymptotical stabilization.