鲁棒PID控制器参数整定与仿真

介绍了一种基于最小-最大原理整定鲁棒PID控制器参数的方法,并应用MATLAB优化工具箱函数按非线性二次规划法搜索合理的PID参数。仿真结果表明,优化函数寻找最佳PID参数简便可靠;当模型在一定范围内变化时,按该方法整定的鲁棒PID控制器均能保证控制系统的动态性能良好。     

基于模糊自适应整定PID 的活套高度控制系统

针对板带热连轧机传统活套高度控制策略存在的问题，提出用模糊自适应整定PID的控制策略．控制器输入取活套量的偏差e和偏差变化率ec，输出取PID控制器3个参数的修正量，从而实现了PID参数的在线自整定．通过MATLAB语言，进行了传统PID控制与模糊自适应整定PID控制动态性能的仿真比较，结果表明采用模糊自适应整定PID控制可明显提高活套高度控制系统的动态性能．     

基于MATLAB的模糊自适应PID控制器的设计与仿真

本文针对在复杂系统中实现自适应参数的PID控制问题,介绍了一种基于模糊控制原理的PID参数自整定控制器的设计方案,同时利用MATLAB中的M文件和相应的FUZZY控制系统函数进行了仿真研究,仿真结果表明,参数自整定模糊控制系统比PID控制系统的鲁棒性好、控制精度得到提高。     

基于MATLAB的模糊自整定PID参数控制器的设计与仿真

针对在复杂系统中实现自整定参数的PID控制问题,介绍了一种基于模糊控制原理的PID参数自整定控制器的设计,并把MATLAB中的FuzzyToolbox和SIMULINK有机结合起来,方便的实现了该模糊自整定PID参数控制系统的计算机仿真。     

基于微粒群算法的PID控制器优化研究

研究PID控制器性能优化中,由于被控对象具有高阶、非线性等特点,而在工业生产过程中,传统的PID参数整定方法易出现超调和震荡问题,使系统响应特性差。为改善系统性能,提出一种改进粒子群算法的智能优化策略,将PID控制器参数作为粒子群中的粒子,以控制误差时间积分函数作为优化目标,进行PID控制参数的并行优化。利用MATLAB仿真软件进行仿真,并通过与传统整定方法(Z-N法)进行比较。结果表明,粒子群的PID参数整定法可提高控制器性能,并能够实现目标的最优整定,为PID控制器性能优化提供依据。     

基于MATLAB的参数自整定模糊PID控制器的两种设计方法

鉴于模糊控制技术和PID控制技术在控制领域中的重要表现,在深入学习研究二者的基础上介绍了两种在MATLAB中实现参数自整定模糊PID控制器的方法,同时对两种方法进行了分析比较:一种通过S-Function实现模糊控制对PID控制参数进行在线整定,另一种则通过完全命令行的方式实现模糊整定与PID控制的无缝连接;通过验证,二者都可以取得理想的控制效果,且第二种方法用MATLAB实现复杂的控制算法,因此得以在学校实验室控制实验上得到了完全应用;用MATLAB实现参数自整定模糊PID控制简单直观、便于操作,是一种比较理想的控制方法.     

基于MATLAB的模糊自整定PID参数控制器的设计与仿真

针对在复杂系统中实现自整定参数的PID控制问题,介绍了一种基于模糊控制原理的PID参数自整定控制器的设计,并把MATLAB中的Fuzzy Toolbox和SIMULINK有机结合起来,方便的实现了该模糊自整定PID参数控制系统的计算机仿真.     

模糊自适应PID控制器参数整定的研究

主要研究了模糊自适应PID控制器参数整定方法,给出了预估计PID参数值的经验公式和方法。用MATLAB软件对PID控制、模糊自适应PID控制的控制性能分别进行了仿真研究,结果表明参数模糊自整定PID控制具有良好的稳态精度和自适应能力。     

Research on Fuzzy Self Adaptive PID Controller with Parameters Tuning

主要研究了模糊自适应PID控制器参数整定方法,给出了预估计PID参数值的经验公式和方法.用MATLAB软件对PID控制、模糊自适应PID控制的控制性能分别进行了仿真研究,结果表明参数模糊自整定PID控制具有良好的稳态精度和自适应能力.     

基于BP神经网络的参数自整定PID控制器仿真研究

PID控制是迄今为止在过程控制中应用最为广泛的控制方法,但在实际应用中,其参数整定仍未得到较好的解决。把神经网络技术应用在PID控制中,充分利用神经网络具有非线性函数逼近能力,构造神经网络PID自整定控制器,并通过MATLAB仿真试验,取得较好的效果。     

煤矿井下安全监控分站的设计及其仿真实现

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.     

Call for Papers The 6^th International Conference on Grid and Cooperative Computing

Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

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