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1.
连续搅拌反应釜(CSTR)系统是一类具有多变量、强非线性和多工作点的复杂工业过程,对外界扰动及内部参数变化较为敏感。针对常规PID控制器参数整定困难,难以取得满意效果,本文提出了一种基于改进粒子群优化算法的CSTR系统鲁棒PID控制方法。通过对优化目标的分析,将鲁棒PID控制器的参数整定问题转化成一个求解最大-最小问题,在对粒子群优化算法进行改进的基础上,引入合作进化思想对该最大-最小问题进行求解,获得了基于优化性能指标最优的鲁棒PID控制器参数。针对实例的仿真结果表明,利用此方法整定得到的鲁棒PID控制器具有良好的鲁棒性,性能指标优于其它方法得到的鲁棒PID控制器,当过程对象操作范围发生大的变化时,利用本文方法设计得到的鲁棒PID控制器能获得满意的结果。  相似文献   

2.
针对聚丙稀反应过程的温度控制,提出了一种简单而鲁棒性较强的鲁棒PID控制算法.即将模型输出上下界和统计的方法,分别应用到聚丙稀反应过程带有滞后环节对象的鲁棒辨识中,再利用Minmax算法对稳定的PID控制器参数进行整定。最后使用UML建立了鲁棒PID控制器参数自整定系统的模型,对其进行了分析、设计和实现。实践表明:该系统能有效地控制聚丙稀反应过程的温度。  相似文献   

3.
针对磁粉制动器扭矩加载系统的非线性和滞后性,提出了一种基于混沌人工鱼群-模糊神经网络(CAFSA-FNN)PID控制器。该控制器采用基于Mamdani模型的模糊神经网络来整定PID控制器的控制参数,并结合混沌人工鱼群算法离线粗调和BP算法在线细调来学习和调整模糊神经网络的参数。利用Matlab进行离线仿真优化,在此基础上使用PID控制器、模糊神经网络控制器、人工鱼群-模糊神经网络控制器以及本文设计的控制器进行磁粉制动器扭矩加载实验,实验结果证明了该控制器的稳定性、快速性和有效性,能够解决滞后性问题。  相似文献   

4.
典型工业过程鲁棒PID控制器的整定   总被引:18,自引:1,他引:18  
提出一阶迟延过程、积分迟延过程、不稳定迟延过程和二阶迟延过程等典型工业过程的鲁棒PID整定公式.本文从抗干扰性能和鲁棒性能两方面综合考虑,把鲁棒PID控制器的设计问题转化为求解一个带鲁棒性能约束的绝对误差积分指标(IAE)优化问题.鉴于该问题是非凸的,本文采用遗传算法来求解,并通过曲线拟合得到典型工业过程的PID控制器的整定公式.仿真结果表明本文的PID整定公式有效,且控制器具有良好的抗干扰能力和频域鲁棒性.  相似文献   

5.
鲁棒PID控制器参数整定与仿真   总被引:1,自引:0,他引:1  
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。  相似文献   

6.
针对动态模拟循环水热交换系统中循环水进口温度具有非线性、大滞后的特点,在目前较流行的串级控制与内模控制相结合的融合控制器基础上改善算法。针对目前内模控制中跟随性能、鲁棒性能方面的缺陷,提出三自由度内模控制器,并结合人工鱼群算法对三自由度内模控制器进行参数整定;为解决人工鱼群算法收敛速度慢、易陷入局部最优的问题,对人工鱼群的步长进行改进,实现自适应变步长;对于温度采集系统中出现的测量误差,选取卡尔曼滤波和平滑对数据进行误差消除。通过SIMULINK仿真证明,变步长人工鱼群算法下的三自由度内模控制器对系统的稳定性和抗干扰性有明显提高。  相似文献   

7.
研究汽车悬架稳定性控制优化问题,由于PID控制器在汽车主动悬架中参数的选择决定汽车行驶的稳定性能.针对传统参数整定的方法存在盲目性,设计了一种用粒子群算法优化整定PID参数的方法.利用粒子群算法的并行全局搜索策略,以主动悬架性能指标为目标函数对PID参数进行优化设计.应用改进方法对汽车悬架主动控制系统进行仿真.仿真结果表明,用粒子群算法优化的PID控制器的汽车主动悬架相对于PID控制主动悬架及被动悬架而言,改善了车身垂向加速度和悬架动行程.同时解决了PID控制器参数整定的问题.  相似文献   

8.
强时变时滞系统的鲁棒PID继电自整定控制技术   总被引:1,自引:0,他引:1  
文章对于工业过程中常见的大时变时滞过程,提出了一种数字鲁棒PID控制器参数继电自整定控制策略和技术,应用这种整定方法整定的PID控制器,闭环不确定系统可具有大时变时滞鲁棒镇定性,且完全抑制负载干扰,具有很好的动静态性能,在造纸工业现场应用效果良好。  相似文献   

9.
用改进的人工蜂群算法设计AVR系统最优分数阶PID控制器   总被引:2,自引:0,他引:2  
分数阶PID控制器(FOPID)是标准PID控制器的一般形式.与PID控制器相比,FOPID有更多的参数,其参数整定也更复杂.本文提出一种基于环交换邻域和混沌的人工蜂群算法(CNC-ABC),用于FOPID控制器的参数整定.CNC-ABC算法由于应用了环交换邻域,增加了解的搜索范围,从而能加快人工蜂群算法的收敛速度;同时利用混沌的遍历性使算法跳出局部最优解.用CNC-ABC算法优化AVR系统的FOPID控制器的参数.仿真结果表明,CNC-ABC算法整定的FOPID控制器比其它FOPID及PID控制器有较好的性能.  相似文献   

10.
基于粒子群优化算法对PID参数的优化整定   总被引:1,自引:0,他引:1  
《软件》2017,(11):67-70
本文首先介绍了PID控制器,在此基础上提出了一种基于智能群算法对PID控制器的比例、积分、微分三个参数进行优化整定的改进PSO算法,并利用Mat lab对PID工业控制器进行模拟仿真,利用仿真曲线进行直观的对比。通过与标准PSO优化算法及常规的Z-N整定法的比较,结果表明基于改进PSO算法对PID的整定方法不仅能快速的从全局搜索出优化的整定参数,而且也能够大大地提升整定效果。实验结果也表明该算法具体良好的收敛速度和稳定性,是一种具有高控制精度、高稳定性和快速性的PID整定算法。  相似文献   

11.
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   

12.
European Community policy and the market   总被引:1,自引:0,他引:1  
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   

13.
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   

14.
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   

15.
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   

16.
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   

17.
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   

18.
《计算机科学》2007,34(4):148-148
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.  相似文献   

19.
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.  相似文献   

20.
This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)SM and Team Software Process (TSP){SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.  相似文献   

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