双采样率网络化串级控制系统的综合调度策略研究  

The Study of Network Cascade Control System with Double-sampling Rate Based on Scheduling

作　　者：张啸宇[1] 刘电霆[1] 

机构地区：[1]桂林理工大学机械与控制工程学院,广西桂林541004

出　　处：《组合机床与自动化加工技术》2016年第1期81-85,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金项目(51165004);2015年广西科学研究与技术开发计划项目"面向中小微企业的产品开放式创新概念设计软件系统研发"(桂科攻1598007-15);2012年桂林理工大学博士基金(2011)

摘　　要：讨论了一种新的双采样率网络化串级控制系统模型,提出了综合调度策略。在网络控制系统调度策略中,变采样周期算法和死区反馈算法都能调节网络资源,提高系统控制性能,但前者对采样率有要求,后者会降低系统控制品质。在综合调度策略中,系统内环使用变采样周期算法,且使用三次指数平滑计算预测值,以降低采样率需求,系统外环使用死区反馈算法,并加入补偿环节,补偿丢失的控制值。此外,针对多个节点,综合策略还加入了基于内外环性能的优先级分配方法。仿真表明,综合调度策略可以提高该系统性能,能保证其网络资源分配。For a new network cascade control system with double-sampling rate, the paper proposes a new comprehensive scheduling strategy. In the scheduling strategy of the network control system, Variable sampiing period algorithm and deadband scheduling algorithm can adjust network resources and improve the control performance, but the sampling rate is required in the former and the latter reduce the control quality of system. In the strategy, the variable sampling period algorithm is used in inner-loop and the forecast values is calculated by the three exponential smoothing method in order to reduce the needs of the sampling rate. The deadband feedback scheduling approach is used in outer-loop and has the compensation link to compen- sate control value dropout. In addition, for multiply notes, the priority allocation method is used based on the control performance of inner-loop and outer-loop. The simulation show that the performance of network cascade control system with double sampling rate is improved by the comprehensive scheduling strategy and the method makes sure its network resource allocation.

关 键 词：综合调度策略 双采样率 串级控制系统 

分 类 号：TH166[机械工程—机械制造及自动化] TG506[金属学及工艺—金属切削加工及机床]