船用蒸汽发生器给水系统的容错控制  

Fault tolerant control of the water-feeding system of steam generators

作　　者：赵淑琴[1] 张永生[1] 

机构地区：[1]中国舰船研究设计中心,湖北武汉430064

出　　处：《中国舰船研究》2016年第2期117-120,138,共5页Chinese Journal of Ship Research

基　　金：国家部委基金资助项目

摘　　要：为提高二回路控制系统的可靠性,以蒸汽发生器给水系统为对象,设计基于BP神经网络的水位容错控制系统。利用Matlab/Simulink仿真平台,建立容错控制仿真模型,并与蒸汽发生器的集总参数仿真模型联合,分别对水位传感器恒偏差、恒增益和卡死故障进行仿真测试。仿真结果表明,容错控制系统的故障诊断模块能够准确、迅速地诊断出传感器故障并启动容错控制模块进行容错控制,使得蒸汽发生器的水位能够稳定在设定值附近,系统运行稳定。基于BP神经网络的容错控制系统对于修正蒸汽发生器水位传感器的故障有效,可用于蒸汽发生器给水控制系统的设计,提高系统的可靠性。In order to improve the reliability of the secondary circuit control system, a steam generator istaken in this paper as the research object, and a fault tolerant control system of the water level is according-ly designed based on BP neural network. Fault tolerant control simulation is also conducted on the Matlab/Simulink platform, where the lumped parameter dynamic models of the steam generator are joined, and thecalculated water level of the steam generator, with the fault of constant deviation, constant gain, or locked,is simulated respectively on the water level sensor. The experimental results show that the sensor faultscould be diagnosed accurately and rapidly with the fault diagnosis model, and the fault tolerant controlshould be implemented when sensor faults occur. Meanwhile, the water level of the steam generator couldbe regulated close to the target value, and the system works steadily. In brief, the proposed fault tolerantcontrol system based on BP neural network is effective to correct the water level sensor fault of the steamgenerator, and the system can be applied into the design of the steam generator water-feeding control sys-tem, which significantly improves the system reliability.

关 键 词：蒸汽发生器 给水 容错控制 

分 类 号：U664.11[交通运输工程—船舶及航道工程]