Two Dimensional Phase Unwrapping Theory Algorithms and Software
Two Dimensional Phase Unwrapping Theory Algorithms and Software，扫描文档，清晰度一般。GTWO-DIMENSIONALPHASE UNWRAPPINGTHEORY ALGORITHMSAND SOFTWAREDennis C. ghigliaSandia National LaboratoriesAlbuquerque, New MexMark D. PrittLockheed Martin CorporationGaithersburg, Maryland藏A WILEY-INTERSCIENCE PUBLICATIONJOHN WILEY SONS, INCNew York Chichester Weinheim Brisbane Singapore / Toronto2005060radar interferogram generated byDeathon each pass, The terrain elevations can be computed from thebut the phase differences must fig problem In regions of steeprrupted where there are radar shadow and "layover"effects. Surfaceoccurred between the two passes, which were 24 days apar alsopThis image was acquired as part of a program for the Terrain Modeling Project Officended byEngineering Center. The SAR data was provided by Radarsat Intenational THinterferogram was generated and provided by Vexcel Corporation, Boulder, Coloradop00This text is printed on acid-free paper.Copyright o 1998 by John Wiley Sons, Inc. All rights reservedNo part of this publicationreproduced, stored in a retrievalsystem or transmitted in any form or by any means, elechanical photocopying, recording, scanning or otherwise,xcept as permitted under Sections 107 or 1O% of the 1976of the Publisher or authorization through payment of theontates Copyright Act, without cither theppropriate per-copy fee to the Copyright Clearance Center, 222750-4744. Requests to the Publisher for permission show(978)ood Drive, Danvers, MA 01923, (978)750-8400, faxnc.. 605 Third A venue. New York, NY 10158-0012(212)850-6011fax(212)850-6008,E-Mail:PERMREQ@WILEY.COMTwo-dimensional phase unwrapping: theory, algorithms, andsoftware/Dennis C Ghiglia and Mark D Pritt.SBN0-471-24935-1(cloth: alk. paper)1. Synthetic aperture radar. 2. Signal processing--Mathematics3. Interferometry. I Pritt. Mark D. [L. Title621.367-dc2l97-3803410987654321;4TWO-DIMENSIONALPHASE UNWRAPPINGFOREWORDTwo-dimensional phase unwrapping is the type of problem that is typically thedomain of the mathematician. It is both complex and abstract However, phaseunwrapping is also the core technology that enables radar interferometryOver the past decade interferometry has changed the way that we use radardata. Radar data are now used for precise measurement of surface topography inclouded regions. Additionally, spaceborne radar systems have proved effectivefor measuring surface changes from earthquakes and volcanic eruptions. Theseapplications have created a new class of radar data users primarily involved inmapping and remote sensing applicationIn Two-Dimensional Phase Unwrapping: Theory, Algorithms, and Softwarethe authors unlock the mystery of phase unwrapping in interferometric datarocessing. This text provides a clear, concise treatment of phase unwrappingthat cannot be found in any other source. It presents for the first time therelationship between theory and application. Its uniform treatment of thevarious phase unwrapping techniques makes it a valuable resource for anyengineer or scientist involved in processing or exploitation of interferometricexpect that radar interferometry will increase in importance over the comingdecade with the development of airborne and spaceborne sensor systemsdesigned to optimally exploit this tcchnology. Two- Dimensionsping: Theory, Algorithms, and Software is an important contribution to ourinderstanding of radar interferometry that will bencfit both research intoadvanced techniques and the design of these future sensor systemsJOHN C. CURLANDEPresident and CEOVexcel CorporationPREFACETwo-dimensional phase unwrapping arises most naturally in, but is notrestricted to, interferometric applications. Measured or calculated phasevalues from two or more mutually coherent multidimensional signals are relatedn a nonlinear manner to a desired physical quantity of interest. The nonlinearityis in the form of"wraps"or cycle discontinuities where an underlying two-dimensional phase is wrapped into the interval (T, r. The wrapped phasemust somehow be unwrapped in order to provide an estimate of the underlyingphysical quantity. Estimation of surface topography from interferometricsynthetic aperture radar(SAR)or extremely accurate profiling of mechanicaparts by optical interferometers are two such examplesOriginally developed for military reconnaissance, SAR is now experiencingnew life in civil applications. In fact civilian and commercial interests are rapidlbecoming the drivers of technology. Clever utilization of the coherent SArimagery in interferometric configurations makes possible the measurement ofsurface topography to accuracies much better than the spatial resolution( 0.3meters to several meters)of the SaR images themselves. Indeed, as is commonplace with interferometers, measurement sensitivities are on the order of theoperating wavelength, which is typically a few centimeters for SAR. Imaginggeometries, noise, and other operational factors degrade performance some-what from centimeter-scale accuracies, but nevertheless SAR interferometrymakes possible global topographic mapping in a timely fashion, in daylight or atnight, in all weather conditions, and with unprecedented accuracyinterferometry also can detect deformations of the earths crust on the orderof millimeters, a capability that shows promise for the timely detection ofearthquakes or volcanic eruptionsThese exciting possibilities have led to an explosive growth in the field of phaseunwrapping as indicated by the increasing number of journal publicationsNewcomers to SAR interferometry and related disciplines will eventuallyonfront the phase unwrapping problem and, undoubtedly, will encounter arather bewildering variety of ideas and algorithms, including those based onneural networks, simulated annealing, cellular automata, genetic algorithms,and other unusual constructs. Which of these are good? Which are not? We doThroughout this book we use the notation(-丌,丌 to represent the interval-丌
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digsilent 培训教材
digsilent是个很好用的电力系统的仿真软件，所以学习好这个软件对自己的学习和工作有很大的帮助。此文档就是大概的介绍digsilent这个软件，适合初学者SILENTDIgSILEnT软件PowerFactory软件发展历程1985年:第一套商业版分析软件开发成功1995年: DIySILENT10.31版软件正式发布1998F: DIgSILENT Power Factory 11.02000-f: DigSILENT PowcrFactory 12.02003-f: DIgSILENT Power Factory 13.02005年:推出 Station ware软件2008F: DIgSILENT Power Factory 14.0目前已经在一百多个囯家得到使用,已售出的软件超过4500套色三一电力科学研究院5www.digsilent.dehttp://www.diasilent.de/support/中国电力科学研究院CHINA ELECTRIC POWER RESEARCH INSTITUTE3SILENTPowerFactory软件的特点丰富的元件库( Equipment Type library);包括详细的系统元件模型如架空线、电缆、变压器、SVC、电流源和电压源等等,以及控制器模型如发电机调压器、调遠器和PSS等等面向程序化过裎的编程语言DPL,能够实现多种静态仿真分析功能,如乜压稳定性、PV/QV敏感性分析等。面向连续运行过程的仿真语言DSL,用于实现暂态稳定性分析过程中系统元件的控制。含多种电力电子元件,如SVC、TCSC等,这些元件都可以利用DSL定义相应的控制模型。中国电力科学研究院PowerFactory软件的特点数据管理方式数据库和数据管理器:分级的面向对象的数据,该教据库以Project为单位对数据进行存储,包含计算分析所需要的电网元件信息、图形信息以及计算设置提供电力系统运行、规划方案信急管理功能:允许用户在电网基础信息的基础上进行某些数据的修改并分别进行保存,如设计不同的护建方案,分析系统不同的运行方式等等完全图形化的操作模式软件由 Data manager和( raphic图形窗口两个工作页面组成,用户可以直接在图形窗口绘制电网、录入和修改电网数据,也可以在 Data manager页面中进行数据的录入和修改中国电力科学研究院CHINA ELECTRIC POWER RESEARCH INSTITUTESILENTPowerFactory软件的特点虚拟表计技术的应用窗口的概念,用于显示通过DP或暂态分析过程中的各变量的归线和波形,用户可以根据自己的需要来定义变量。数据兼容性提供用于与SC∧D八/(S进行数据交换的数据交换语言DOIF可以通过Excl进行数据的输入和输出〉与PSSE/E和PSS/U等电力系统仿真软件的数据进行转换。中国电力科学研究院CHINA ELECTRIC POWER RESEARCH INSTITUTEPowerFactory软件的主要功能潮流计算描述复杂的单相和三相AC系统及各种交直流渑合系统。潮流求解过程提供了3种方法以供选择:经典的牛顿拉夫逊算法、牛顿一拉夫逊电流迭代法和线性方程法(直接将所有模型作线性化处聖)。提供变电站控制、网络控訇、变压器分接头调整控以及多和远程控制模式故障分析支持几乎所有的故障类型(包括复故障分析)。谐波分析可以模拟各种谐波电流源和电压源,并提供计及集肤效应和内在自感的与颇牽相关的元件模型。中国电力科学研究院CHINA ELECTRIC POWER RESEARCH INSTITUTE5SILENTPowerFactory软件的主要功能稳定性分析能够实现机电暂态和电磁暂态的仿真汁算,能够仿真电力系统几乎所有类型的故障,仿真分析的结果能够通过虚拟表计来绘制成曲线图可靠性分析将系统充裕性和安全性进行了综合考虑,主要包括三个方面预想事故分祈、发电可靠性佔计和网络可靠性估计。保护它包含了许多额外的原件如CT、ⅥT、继它器等。所有这些保护元件在静态、晢态情况下都能够使用。在所有可能的仿真模式如潮流分析、故障分析、机电暂态和电磁暂态等情况下这些保护元件都能够响应。中国电力科学研究院CHINA ELECTRIC POWER RESEARCH INSTITUTEPowerFactory软件的主要功能最优潮流最优湖流计算是对基本潮流计算的有效补充。最优潮流计算主要采用内点法,并提供了多种约束条件和控制手段,其考虑的目标函数主要有最小网损、最小燃料赀用、最大利润及最小区域交涣潮流配网优化能够实现电容器选址优化、解环点优化以及电缆补强优化三种优化功能。低压网络分析根据连接到某一线路上的用户数量来定义负荷、考虑负荷的多样性、在进行潮流计算时考虑负荷多样性并计算电压最大跌落值和最大支路流、自动进行电缆补强、电压跌落和电缆负载卒分祈等。中国电力科学研究院CHINA ELECTRIC POWER RESEARCH INSTITUTE6SILENTPowerFactory软件划分配网包二业用户包输电网包风电应标准版专业版标准版专业版标准版专业版标准包用包剛流计算女障分析最优潮流保护「诸波机电暂态电磁暂态低压网终分析配网优化靠性分析中国电力科学研究院CHINA ELECTRIC POWER RESEARCH INSTITUTEPowerFactory在风电领域的独特性风电机组模型基于双馈感应发电机的变速风机基于变频器控制同步发电机(CDSG)的变速风机基于普通感应发电机的恒速风机·风电机组控制风电机组叶片机械特性模拟桨距角控制发电机保护和转子短路保护器(Crow-bar)建模变频器控制建模中国电力科学研究院CHINA ELECTRIC POWER RESEARCH INSTITUTE7Power Factor y软件界面介绍中国电力科学研究院CHINA ELECTRIC POWER RESEARCH INSTITUTE基本概念·用户在 PowerFactory中所进行的所有数据录入、设置和修改信息都自动存储在 Database中(即安装目录下的DB文件),用户无需自定义存储路径。所搭建网络能够以图形的形式显示录入数据的方法在图形用户界面录在 data manager中录入中国电力科学研究院CHINA ELECTRIC POWER RESEARCH INSTITUTE8SILENTDAtabase的主要结构Global Library:软件内置的元件Library库,含电力系统相关的所有标准元件类型,如发电机、线路、变压器以及相关控制器的元件类型等等。只有管理员能够进行修改。ProjectLocal Library:User3在当前Library的 Project中自定义的元件库,User3能够进行修改。中国电力科学研究院CHINA ELECTRIC POWER RESEARCH INSTITUTEa1x的m③6“s“a“AaMPowerFactory Database连de1F他mao0612106k计ate FolderET Induct006-12!o82Am时世EOr Driven Mac黑 tor Draventro st adand Iode10-30 10: LAbatnintrateranrfonmeEs. rm EtatienFare软件内置元件库Castable r分 tea ttrslielm卿bxe;模型及算例a I2E Exuele Std 192-19312553 metre basebar自定义用户名9SILENTroject的概念Project一项目包含项目分析计算所需的所有数据◆电网数据和网络拓扑结构负荷数据、发电厂相关数据系统运行方式◆仿真事件和语句仿真分析结果中国电力科学研究院CHINA ELECTRIC POWER RESEARCH INSTITUTE功能图标区室是画=x图山×g团w出回的A国日工已激活的 Project区哇白60Data Manager由团鱼8绘图区数据管理窗①①围厂多t()=A+·Mue4M凸结果输出窗10
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