CAJ | 학술논문

针对分布式控制系统由于负载不均衡、网络通信量大等引起的时延问题，文中设计了基于请求划分的任务分配模型，提出了基于实时动态比例积分（PI）反馈控制的负载均衡算法。该算法利用增量 PI 控制的思想，根据服务器节点性能的实时反馈值动态调节服务器节点的分配权值，通过虚拟节点转移算法局部调整虚拟节点的分配，以维护哈希空间的稳定。仿真实验结果表明，该算法实现了分布式控制系统的动态负载均衡，减小了服务器资源消耗及用于存取远程数据的通信开销，提高了控制系统的实时性，具有良好的扩展性和容错性。
침대분포식공제계통유우부재불균형、망락통신량대등인기적시연문제，문중설계료기우청구화분적임무분배모형，제출료기우실시동태비례적분（PI）반궤공제적부재균형산법。해산법이용증량 PI 공제적사상，근거복무기절점성능적실시반궤치동태조절복무기절점적분배권치，통과허의절점전이산법국부조정허의절점적분배，이유호합희공간적은정。방진실험결과표명，해산법실현료분포식공제계통적동태부재균형，감소료복무기자원소모급용우존취원정수거적통신개소，제고료공제계통적실시성，구유량호적확전성화용착성。
In order to solve the problem of slow response caused by the load imbalance and the communication overhead in distributed control systems,a task allocation model is constructed on the basis of the request division, and a dynamic load-balancing algorithm is proposed on the basis of the real-time dynamic proportional integral (PI) feedback control.This algorithm adopts the PI control method to dynamically adjust the allocation weight of server nodes according to the real-time feedback values of the performance of the nodes,and then employs the virtual node transfer algorithm to partially adjust the distribution of virtual nodes,so as to maintain the stability of Hash space. Simulation results show that the proposed algorithm realizes the dynamic load balancing of distributed control sys-tem,reduces the communication overhead and improves the real-time performance of the control system,and that the proposed algorithm is of a high expansion and an excellent fault tolerance.