基于有限带宽的NCS模糊动态反馈调度算法研究

带宽受限是影响网络控制系统正常运行的一个重要因素。将模糊控制理论引入反馈控制实时调度框架体系。提出了基于有限带宽分配的模糊动态反馈调度算法。该算法综合考虑了系统中各控制回路的控制偏差和偏差变化率。通过动态调节各控制回路的优先级,在满足系统的实时性要求的同时,能使网络具有较好的服务质量。仿真结果证明了所设计的算法要优于EDF算法,能够更有效的提高网络控制系统的控制质量。

Research on the Fuzzy Dynamic Feedback Scheduling Algorithm of NCS Based on the Limited Bandwidth

Limited bandwidth is a kind of crucial factors to affect the networked control systems. The fuzzy control theory is brought into the real-time scheduling frame system of feedback control; meanwhile a fuzzy dynamic feedback scheduling algorithm based on allocation of the limited bandwidth is given in this paper. The deviation and deviation rate of corresponding control loop is considered in the algorithm, with its results to adjust to the priority of the control loops in dynamic, the real-time requirement of the systems can be met, so the network could have a better quality of service. The simulation results show that the design of the fuzzy dynamic feedback scheduling algorithm is superior to the algorithm of EDF, and the method can improve the quality of control of the networked control systems in effectively.