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许多工业过程都具有强耦合、非线性等复杂过程特性;针对具有变量间强耦合和执行机构非线性的一类典型过程对象,提出基于Hammerstein模型的多变量动态矩阵解耦控制算法;并针对实验室电加热锅炉与强制对流换热器组成的广义对象,采用s7—300可编程序控制器,将控制策略应用于该对象,实现了对锅炉内胆水温及强制对流换热器出口水温的控制;实验结果表明,采用基于Hammerstein模型的多变量动态矩阵解耦控制策略,在解耦效果、设定值跟踪及抗干扰响应等方面,都能取得满意的结果,能够解决一类多变量非线性系统的控制问题。 相似文献
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热风炉燃烧系统最优控制 总被引:1,自引:0,他引:1
热风炉燃烧系统是复杂多变量系统,基于最优控制策略,对具有耦合作用的多变量热风炉燃烧系统进行解耦.通过引入神经网络环节,将强耦合多变量系统转化成多个独立的单变量系统,对每个单变量系统进行预测函数控制,实现热风炉燃料流量的最优控制和拱顶温度及废气温度的平稳控制.解耦控制采用前馈补偿器解耦,解耦补偿器采用BP神经网络结构.现场实际应用结果表明,该控制策略具有较好的动态跟踪特性,能满足复杂多变量控制系统的实时控制要求. 相似文献
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针对非线性、多变量、强耦合的电厂制粉系统,运用分组解耦方法,通过分组解耦网络运算,分离出最大耦合度的支路,降低了系统之间的耦合,提高了系统的控制精度.结合动态矩阵控制(DMC)算法仿真,结果表明基于分组解耦的控制算法明显降低了控制系统的耦合度,使系统达到满意的控制效果,对进一步应用研究具有很好的参考价值. 相似文献
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针对火电单元机组协调系统的多变量强耦合特点,提出一种基于内模控制器与解耦器一体化思想的内模解耦控制方法.区别于一般的多变量内模控制,将解耦技术与内模控制相结合,同时具有解耦器和内模控制器的特性.首先根据相对增益系数矩阵选择控制主通道,然后通过基于逆向解耦的原理设计控制器,其计算过程简单并且适用于高阶对象.最后以300MW单元机组为控制对象,在MATLAB/SIMULINK环境下,仿真并验证了控制器在不同工况下均可以实现较好的控制品质,具有较强的鲁棒性. 相似文献
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多变量线性系统解耦控制算法研究 总被引:1,自引:0,他引:1
由于耦合现象的存在使得多变量被控对象的控制和分析变得非常复杂,耦合严重时甚至使原来稳定的单回路系统变得发散,无法正常运行;针对这种现象,对多变量耦合被控对象的解耦问题进行了研究,阐述了多变量线性系统基于状态反馈和输入变换的解耦控制理论,详细推导了状态反馈矩阵和输入变换矩阵的构造方法和具体计算步骤,并就此问题给出了一个具有较高实用价值的MATLAB通用程序,仿真结果验证了该程序的有效性;为多变量耦合系统的进一步设计提供了条件. 相似文献
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专家控制在球磨机中的应用 总被引:1,自引:0,他引:1
田传波 《自动化技术与应用》2008,27(10):25-27
中储式球磨机制粉系统是一个大迟延、强耦合的多变量非线性时变系统。针对强耦合多变量的特性,提出一种新的解耦方法——利用专家控制器代替前馈补偿器进行补偿解耦。介绍了专家控制器的制定过程,并应用于球磨机制粉系统中。仿真结果表明:该方法具有较好的解耦能力,动静态特性及鲁棒性。 相似文献
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为保证安全性与快速性,大型超导磁体预冷过程中需要通过冷热氦气混合来严格控制温差与压降.大型氦低温系统中这一冷热氦气混合过程具有双变量强耦合、非线性以及迟延等难控特性.为实现其自动控制,通过过程的动态特性、系统关联以及控制逻辑分析,设计了分阶段的解耦控制方案.根据相对增益计算,得出弱耦合阶段的变量匹配控制方案;强耦合阶段采用非线性乘法解耦器、不同频率的采样调节器、带有死区的非线性PID控制算法及增益调度进行解耦控制.该方案在DCS中易于实现,可用于超导磁体的降温与回温控制.实际运行结果表明,解耦后系统有较好的稳定性与鲁棒性,温差控制及时且超调量小,在确保冷却装置安全的同时又保证了降温速率,很好地满足了降温实验需求. 相似文献
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S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained. 相似文献
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European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven. 相似文献
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融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。 相似文献
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张涛 《计算机测量与控制》2015,23(1):86-89
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值. 相似文献
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Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them. 相似文献
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This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives. 相似文献
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潘丽 《自动化与仪器仪表》2014,(7):80-82
自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。 相似文献
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Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what
is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic
sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and
its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of
an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify
robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can
or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest.
This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January
31–February 2, 2008 相似文献
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Jacob Palme 《Software》1979,9(9):741-747
The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users. 相似文献