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近20年来,分散型控制系统DCS已在工业过程控制应用中占主导地位.本文详细介绍了随着科学技术的发展,DCS关联领域的许多新进展;还介绍了DCS技术今后发展的趋向. 相似文献
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<正>一、概述以上几讲中,我们较为详细的讨论了DCS的体系结构和现场控制级的功能及其实现.DCS中的另一个主要部分是操作员站.操作员站是整个系统的人——机接口,它提供了显示、打印控制操作以及具它一些管理功能.操作员站位于现场控制级和上层管理级之间.操作员站突出地体现了计算机、图形学的发展现状.它是整个DCS系统中发展最快的部分.操作员站一般采用较为先进的计算机,如现在最新推出的很多大型DCS中采用RISC芯片构成的工作站为操作员站.另外,操作员站的用户界面受当今软件发展影响也很大.现在就推出的DCS或升级的DCS多采用了WIN-DOWS画面处理技术.操作员站一般提供以下几种功能:控制调节功能、流程显示功能、系统维护功能、报警显示功能、报表打印功能、趋势显示功能等. 相似文献
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以分布式控制系统(DCS)为例介绍了信息化为提升工业化所能做的实际工作,并介绍了DCS的发展现状与趋势及第四代DCS系统. 相似文献
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简述了DCS系统的功能特点、应用情况以及今后的发展方向;简要分析了DCS系统两种采购方式的优缺点. 相似文献
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随着DCS技术的发展和引进DCS技术在我国电力行业的多年应用,国产DCS技术及产品也得到了广泛的应用.在某核电站新建机组调试过程中,搜集整理了国产DCS系统HOLLiAS MACS V6在该核电站控制应用中的几个典型实例,分别从传输差错及检测、系统容错及冗余、工程适应性三方面进行分析探讨,从用户的角度对国产DCS系统H... 相似文献
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本文分析了集散系统I/A Series的硬件与软件配置,从中可以看出DCS的发展方向.对引进的DCS系统进行广泛的分析与评价,对我国的DCS系统的应用与研究大有益处. 相似文献
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周哲民 《自动化技术与应用》2011,30(2):25-27,54
分析了影响DCS可靠性的因子,从DCS可靠性设计准则、DCS选型、冗余设计、抗干扰设计和组态设计介绍了提高DCS可靠性的工程设计的整体思路和策略. 相似文献
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智能厂房温湿度控制系统 总被引:4,自引:0,他引:4
首先分析了厂房温湿度控制与一般建筑物空调系统的区别,指出现在流行的空调控制方法不适合厂房温湿度控制;接着提出一种智能温度控制方法,它不需要确定系统的数学模型,用专控制的方法,在不同控制阶段分别采用开关控制,模糊控制和智能PID控制;最后介绍了实行结果。 相似文献
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This article presents a novel three-loop control system, which supplements control structures known from the literature as model following control (MFC). The major advantage of the proposed system is its high robustness to process parameter variations; it is much higher than that offered by single-loop or two-loop control systems. Features of the new structure are revealed by a theoretical analysis that has been carried out from the viewpoint of requirements for a force/pose controller of a Stäubli RX60 manipulator. This article shows how the proposed control structure responds to such strong process parameter variations and makes a comparison to results yielded by single-loop control structures. 相似文献
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模型跟踪广义预测鲁棒自适应控制器 总被引:4,自引:1,他引:4
本文采用滤波CARMA模型,基于内模原理,提出了一种新的广义预测鲁棒自适应控制器,并分析了闭环系统性能,在新的控制器中,引入适当的前馈作用,使得跟踪和调节问题解耦,利用部分状态跟踪、模型参考以及极点配置方法解决跟踪问题,利用多步预测滚动优化方法解决调节问题;适当选择滤波器可以保证对平稳随机扰动有满意的响应,减少可调参数对闭环系统响应的影响,增强系统对未建模动态的鲁棒性,仿真结果表明:该控制器对确定性和非平稳随机扰动具有不变性,对系统时延和阶次变化具有鲁棒性,适用于非最小相位和开环不稳定系统。 相似文献
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一种专家智能控制器的仿真研究 总被引:1,自引:0,他引:1
该文提出一种专家智能控制器(简称为EI控制器).该控制器的参数可基于专家知识和过程参数的变化实时进行调整。仿真结果表明对于工业过程中的大纯滞后、非线性、变参数特性能获得较为满意的调节效果。 相似文献
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An approach to the synthesis of control laws stabilizing motion and force in contact tasks, based on the exponential stability of the closed-loop control system, is described. When using the synthesized control laws, simultaneous stabilization of both motion and force is achieved with a preset quality of the transient responses. The task is solved in a most general form, taking into account the constraints on robot control, its position and the force of interaction of the robot and the environment, and the external perturbations and inaccuracies of the measuring sensors, when the environment dynamics is being described by nonlinear second-order differential equation, and the robot dynamics includes the third-order equations of the robot actuators dynamics. 相似文献
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对于具有较大时滞,非线性和时变性特点的打样机对象(它是印染行业中的一种小型设备),常规PID控制方法往往难以达到良好的控制效果.本文将专家控制器与常规PID控制器相结合,提出了一种智能控制器结构.试验表明,与常规PID控制器相比,该控制器的控制精度有了明显的提高. 相似文献
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Jorge Diaz-Salgado Jesus Alvarez Alexander SchaumJaime A. Moreno 《Journal of Process Control》2012,22(1):303-320
The robust feedforward (FF) output-feedback (OF) control problem of (possibly open-loop unstable) continuous exothermic jacketed reactors with isotonic kinetics with respect to reactant concentration is considered. The volume, temperature, and concentration must be regulated by manipulating the feed, exit and coolant flowrates on the basis of volume and temperature measurements. The problem is addressed as an interlaced controller-observer design within a constructive control framework. The result is a quasi linear-decentralized (qLD) FF-OF dynamic controller which: (i) recovers (up to observer convergence) the behavior of a robust nonlinear FF-SF controller, (ii) has closed-loop stability conditions coupled with conventional-like tuning guidelines, and (iii) constitutes an add-on to the PI control scheme commonly employed in industrial reactors. The approach is tested with an open-loop unstable reactor example through simulations. 相似文献
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Juan Garrido Francisco Vázquez Fernando Morilla 《International journal of systems science》2016,47(5):1054-1072
This paper presents a new methodology to design multivariable proportional-integral-derivative (PID) controllers based on decoupling control. The method is presented for general n × n processes. In the design procedure, an ideal decoupling control with integral action is designed to minimise interactions. It depends on the desired open-loop processes that are specified according to realisability conditions and desired closed-loop performance specifications. These realisability conditions are stated and three common cases to define the open-loop processes are studied and proposed. Then, controller elements are approximated to PID structure. From a practical point of view, the wind-up problem is also considered and a new anti-wind-up scheme for multivariable PID controller is proposed. Comparisons with other works demonstrate the effectiveness of the methodology through the use of several simulation examples and an experimental lab process. 相似文献