双水箱容错控制系统(策略)设计

Ahmed GussmALLA M. Mohammed, H. Sirag, Sally Dafa allah A. Alkareem, M. Amien
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引用次数: 1

摘要

在工业生产过程中,对可靠性、可用性和安全性的要求总是很高。容错控制(FTC)是当今自动化行业的基础。由于执行器、传感器或系统的不同部分可能存在缺陷,控制系统容易发生故障。动力系统部分的设备故障对造成不可预测的工厂停运也有显著的经济影响。本文的主要目标是开发一种控制方法/策略来估计错误/故障,保证系统在正常和故障环境下都有满意的性能,此外还实现了正确的容错识别方法,从而使系统运行的过程可靠。这可能发生在非线性水箱系统中,在一个工作点周围线性化,并由数学模型执行。采用基于极限检查的模型故障检测方法进行故障检测。系统组件在安装的控制器下工作,控制器与FTC相连。然后,对每个部件进行故障模拟和独立输入。之后,当设备发生故障时,需要重新配置控制器(连接FTC)。结果表明,当故障在系统部件中单独注入时,油箱液位受到影响,达到设定值(50%)以下。在FTC的视线范围内,当故障注入时,比例、积分和导数(PID)控制器重新配置泵的流量和阀门位置,以维持储罐2的液位。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Design of Fault Tolerant Control System(strategy) for Two Water Tanks
In industrial processes, reliability, availability, and safety, are always in a high demand. Fault tolerant control (FTC) is fundamental these days in the automation industry. Control systems are susceptible against breakdown because of feasible shortcomings in actuators, sensors or different parts of the system. Equipment disappointment of the dynamic system part has additionally a noteworthy economy affect for causing unpredictable plant shutdown. The primary goal of this paper is to develop a control approach/strategy to estimate errors/faults guarantee a satisfactory performance for the system under both normal and fault environments, in addition to implement the correct fault tolerant identification method that will result in a reliable process of system operation. This can occur in nonlinear water tank systems, linearized around an operation point and performed by a mathematical model. The limit check based-model fault detection was used to detect the fault. The system component work under installed controller with FTC connected to it. Then, fault is emulated and entered independently for every part. After that a controller (with FTC joined to it) is to be reconfigured, when equipment fault occurred. The obtained result shows that, when the faults are injected separately in system components, the tank2 levels is affected and reach below the set point (50%). Within the sight of FTC, when the faults are injected, the proportional, integral, and derivative (PID) controller reconfigure the pump flow rate and valve position to maintain tank2 level.
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