基于LabVIEW的随动采统仿真平台的实现

基于美国 ＮＩ 公司的虚拟仪器软件开发平台ＬａｂＶＩＥＷ及微分方程的龙格库塔算法,本文介绍了利用ＬａｂＶＩＥＷ的基本库函数开发随动系统仿真实验平台的方法。该方法不需要借助 ＬａｂＶＩＥＷ昂贵的仿真工具箱,节省了开发费用。     

产品新闻发布

ＮＩ公司发布面向因特网的智能化测量软件ＬａｂＶＩＥＷＴＭ6ｉ据美国德克萨斯州奥斯汀报道——— 2 0 0 0年 8月 16日开始发售面向因特网的智能化测量软件ＬａｂＶＩＥＷＴＭ6ｉ。利用此版本 ,用户可以将应用程序随同新的“ＬａｂＶＩＥＷ播放器ＴＭ(ＬａｂＶＩＥＷＰｌａｙｅｒＴＭ)”插件发送给同事、在网络上发布数据以及在整个企业中进行数据共享。ＬａｂＶＩＥＷＴＭ6ｉ具有以下优点 :1 除了新的因特网功能以外 ,ＬａｂＶＩＥＷ 6ｉ的用户还可以享受到智能化测量与控制的优越性 ,用比以前版本的Ｌａｂ ＶＩＥＷ更简明的步骤来构建他…     

基于C语言的虚拟仪器系统开发

在介绍最新技术－－虚拟仪器及其开发环境ＬａｂＶＩＥＷ的特点的基础上,分析并实现了将ＬａｂＶＩＥＷ与Ｃ语言接口的高级技术－－ＣＩＮ。实践证明,该方法高效、易行,是增强ＬａｂＶＩＥＷ整体功能的一条很好的途径。     

科技动态

ＮＩ推出ＬａｂＶＩＥＷＦＰＧＡ预展系统　　 2 0 0 2年 11月 19日 ,ＮａｔｉｏｎａｌＩｎｓｔｒｕ ｍｅｎｔｓ宣布推出ＬａｂＶＩＥＷＦＰＧＡ预展系统。这是一套集成开发系统 ,它将广泛应用的图形化编程语言ＮＩＬａｂＶＩＥＷ功能扩展到了现场可编程门阵列 (ＦＰＧＡｓ)中。负责测量和控制的工程师们现在可以用ＬａｂＶＩＥＷ开发自己的应用程序并将其运行于ＮＩ基于ＦＰＧＡ的可编程Ｉ Ｏ硬件上。“ＬａｂＶＩＥＷＦＰＧＡ预展系统为测量和控制应用带来了前所未有的计时、控制和同步功能 ,”ＮＩ产品策略副总裁ＲａｙＡｌｍｇｒｅｎ先…     

数据流编程的图形软件LabVIEW及其应用

本文介绍著名的数据流编程的图形软件ＬａｂＶＩＥＷ及其应用。并介绍作者使用ＬａｂＶＩＥＷ开发的专用子程序库以及使用这个库编制的应用程序。     

虚拟仪器和LabVIEW在生物医学信号检测处理中的应用

介绍采用虚拟仪器和ＬａｂＶＩＥＷ来检测,分析,处理生物医学信号的方法和技术,并提出了虚拟医学仪器的概念,给出屯利用虚拟仪器和ＬａｂＶＩＥＷ来研究麻醉深度检测的应用实例。     

浅谈虚拟仪器技术的演化与发展

浅谈虚拟仪器技术的演化与发展ＶｉｒｔｕａｌＩｎｓｔｒｕｍｅｎｔａｔｉｏｎＴｅｃｈｎｏｌｏｇｙａｎｄＥｖｏｌｕｔｉｏｎ（中科泛华）林正盛（接第四期）ＬａｂＶＩＥＷ中的程序查错不需要先编译。只要存在语法错误，ＬａｂＶＩＥＷ会马上告诉您。只要用鼠标轻轻点两...     

虚拟仪器系统开发技术

简要介绍了虚拟仪器和虚拟仪器系统开发技术以及ＬａｂＶＩＥＷ开发平台的功能特点及使用方法,介绍了ａｂＶＩＥＷ开发平台研制的虚拟仪器实例。     

LabVIEW在并行程序设计中的应用

介绍了一种新型的计算机测控系统的软件开发平台ＬａｂＶＩＥＷ。根据其图形化编程、数据驱动的特点，提出了一种利用ＬａｂＶＩＥＷ在Ｗｉｎｄｏｗｓ环境下设计并行程序、仿真并行信号处理算法的方法，并给出了实际应用的例子。     

怎样在LabVIEW中调用Win32动态连接库(DLLs)

ＬａｂＶＩＥＷ是美国国家仪器公司开发的基于图形化的程序设计语言。以Ｗｉｎｄｏｗｓ９５／９８／ＮＴｋ ＵＳＥＲ３２．ＤＬＬ库中的信息框函数ＭｅｓｓａｇｅＢｏｘＡ为例,说明在ＬａｂＶＩＥＷ中怎样库。     

LABVIEW中模糊逻辑工具箱在形体辨识中的应用

介绍基于LabVIEW的模糊逻辑工具箱——Fuzzy Logic for G Toolkit的使用方法，文中以辨识传送带上被传送物体的几何形体为例，介绍了建模的方法、模糊逻辑控制器的设计以及基于PC的仿真。     

基于LabVIEW的灰水模糊控制系统的设计

目前燃煤火电厂外排灰水普遍存在pH值超标的问题。针对控制过程的非线性、时变性、大滞后、多变量紧密耦合的特点．采用模糊控制方案。介绍了基于LabVIEW的模糊逻辑工具箱(Fuzzy Logic for G Toolkit)的使用方法，并利用它设计出模糊控制器。结合hbVIEW开发平台，设计出灰水DH模糊控制系统，实现了对灰水pH的有效控制。     

风力发电机偏航系统风向模糊控制仿真

针对风向变化的随机性和不确定性等特点,在LabVIEW平台上,利用其模糊控制工具包对风力发电机偏航系统的风向模糊控制进行了仿真。进行了模糊控制规则的制定,I/O测试,模糊控制仿真程序设计及仿真前面板设计。并进行了仿真分析,结果表明,利用基于LabVIEW的模糊控制工具包设计风力发电机偏航系统风向模糊控制能得到合理的调向路径,很好的实现风轮对风,可以满足风力发电机偏航系统主动迎风的工作要求。     

Translations and similarity-based logic programming

In order to provide approximate reasoning capabilities, in Gerla G, Sessa MI (1999) Chen G, Ying M, Cai K-Y (Eds) Fuzzy Logic and Soft computing, 19–31, Kluwer Academic Publishers, Boston an extension of Logic Programming has been proposed. Logic programs on function-free languages are considered, and approximate and imprecise information are represented by introducing a similarity relation ? in the set of predicate names and object names of the language. The inference system exploits the classical resolution rule of the Logic Programming paradigm. Moreover, the notion of fuzzy least Herbrand model is also provided. In this paper, by introducing the general notion of structural translation of languages, we generalize these results to the case of logic programs with function symbols. Some properties of the similarity relations are also proven.     

Uncertain Rule-Based Fuzzy Logic Systems: Introduction and New Directions (Mendel, J.M.; 2001) [book review]

The book comprises 14 chapters and three appendices. The chapters are organized onto four parts: Preliminaries, Type-1 Fuzzy Logic Systems, Type-2 Fuzzy sets, and Type-2 Fuzzy Logic Systems. The book proves to be a valuable resource for professionals seeking to work with fuzzy sets in general and type-2 fuzzy sets in particular.     

Application of probability to enhance the performance of fuzzy based mobile robot navigation

This paper presents a new path planning algorithm based on Probability and Fuzzy Logic (PFL) as a duality technique to enhance the performance of Fuzzy Logic alone. Fuzzy Logic interacts with the grading of obstacles existed in the path and probability lies over the decision to move the mobile robot. The fuzzy grading correspondence with the probabilistic decision is the primary function of moving the mobile robot towards the goal and the secondary is path planning which lies over the probability distribution function. The distance–speed combination rule is developed for effective navigation. The single and multiple mobile robot systems have been tested successfully in a dense environment in presence of obstacles (static and dynamic) and moving goal. The obtained results are optimal when compared to other navigational approaches in sense of navigational path length and time in the static and dynamic environment.     

Designing Type-1 and Type-2 Fuzzy Logic Controllers via Fuzzy Lyapunov Synthesis for nonsmooth mechanical systems

In this paper, Fuzzy Lyapunov Synthesis is extended to the design of Type-1 and Type-2 Fuzzy Logic Controllers for nonsmooth mechanical systems. The output regulation problem for a servomechanism with nonlinear backlash is proposed as a case of study. The problem at hand is to design a feedback controller so as to obtain the closed-loop system in which all trajectories are bounded and the load of the driver is regulated to a desired position while also attenuating the influence of external disturbances. The servomotor position is the only measurement available for feedback; the proposed extension is far from trivial because of the nonminimum phase properties of the system. Performance issues of the Type-1 and Type-2 Fuzzy Logic Regulators that were designed are illustrated in experimental studies.     

基于信度语义的算子模糊逻辑

本文在算子集与值域不同的算子格上，基于信度语义定义了一种归结推理更自然、具有结合性的算子模糊逻辑ＢＡＯＦＬ及一种语义有层次性的，非单调的算子模糊逻辑ＮＭＯＦＬ。