散货码头集散控制系统的容错控制

【作者】 蔡海鹰；

【导师】 褚建新； 顾伟；

【作者基本信息】 上海海运学院 ， 电力电子与电力传动， 2001， 硕士

【摘要】 集散控制系统是以微处理机为核心，以满足现代化企业生产、相互关系日益复杂的控制对象的要求为前提。从过程综合自动化的角度出发，集中处理信息、集中管理，而控制权分散的一种多级分布式计算机控制系统，目前已经广泛应用于工业生产和控制管理领域。 容错控制是一种提高系统安全性和可靠性的新技术，容错控制以大量的在线故障检测、参数辨识和模型计算为基础，在系统出现故障时，适时修正系统的控制率，使系统继续维持既定的运行目标，具有适应能力强、可靠性高、功能强等特点。 本文以华能南通电厂输煤控制系统工程实例为对象，采用主动性容错的方法构建系统的容错控制律重构模型，解决系统的实时故障诊断和容错控制律重构两大问题。 本文第二章对控制对象根据功能的不同分解为三个相互独立的子系统，运用状态空间理论及矩阵构造的方法对其中的流程控制系统设计了容错控制模型。第三章采用基于径向基神经网络的方法进行容错控制的实时故障诊断，并用Matlab给出了仿真结果。第四章进一步探讨了主动容错在流程控制中的实现问题，即根据故障诊断的结果，实时计算故障函数，在线修改系统的控制律的方法来实现容错控制律重构。第五章采用VC++编制仿真程序，对控制系统进行仿真，作出验证。第六章阐述了如何利用OPC技术，打通与FIX组态软件的缺口，将容错子程序外挂到基于FIX平台的输煤控制系统控制程序中。这种方法结合目前高速微处理器的发展，少量实时计算带有高斯函数的方程，为目前集散控制系统的发展提供了一种带有容错化的思想。更多还原

【Abstract】 Distributed Control System is not only based mainly on the microprocessor technique, but also the requirement of modern enterprise manufacture and the co-relationship among the control objects with the increasing complexity. From the view of process integrate automation, it can be regarded as one kinds of multi-level distributed computer control system, which has the concentrated way in dealing with information and management, while the scattered solution in control. It has been widely used in industrial production and the fields of control and management.Fault Tolerant Control is one kind new technique with the aim to enhance the system security and system reliability. FTC is basically depended on a great deal of online detection, parameter identification and model calculation. It can revise the system control rules when the fault occurred and then maintain the system operation according the original goal. And it has the specialty of stronger adaptability, higher reliability and better function etc.The paper regards the coal-transporting systen of the Huaneng Nantong power plant as the study object, applied the active tolerance to design the reconstructed model of tolerant control rule, to solve the two problems of real-time FDD and CRR.In the second chapter we divide the system to three independent parts according to the different function of the object, then towards one part of system, flow system, designed fault tolerant model using state space theory and matrix construction. In the third chapter it is applied the RBF neural network to solve the real-time FDD, and the simulation result is given by MatlabS. 3 software. In the fourth chapter the more details of realizing the fault tolerant flow control is discussed, and and the CRR is settled by the conclusion of FDD and the real-time function calculation which achieve the goal of the system control rule on-line reconstruction. In the fifth chapter we complied the simulated program by Visual C++ for the whole theory to draw the conclution. In the sixth chapter we applied the OPC technology to the actual object, then the tolerant program can be linked with the mainIIcoal-transporting program based on FIX software by a little modification. The way is associated with the development of high speed CPU so as to real-time compute some Gaussian function. It presents a way with tolerant idea for solving the security and reliability in DCS now.更多还原