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NURBS110707
高速切削加工技术是一种先进的制造技术，具有强大的生命力和广阔的应
用前景，已成为切削加工的主流。数控插补技术是数控系统实现轨迹运动控制
的基础，插补运算是CNC系统软件实现运动控制的核心模块，插补算法的优劣
将直接影响到CNC系统的性能。因此，实现一种高精度和高速度的插补方法是
插补的关键所在。
本文在分析传统基准脉冲插补、数据采样插补的算法的基础上，着重研究
了三次NURBS曲线实时插补技术，针对部分算法的不完整或效率低，提出了
一种简单快捷的插补算法。采用NURBS曲线的矩阵表达式，将整个插补过程
分解为插补预处理和实时插补。在插补预处理中完成了大量的计算，预处理的
计算结果直接应用于实时插补，使插补算法满足了NURBS曲线插补的实时性
要求，再辅以必要的轮廓误差控制，实现了加工速度自适应于加工路径的
NURBS曲线直接插补。
本文讨论的插补算法采用C++语言实现，并在VC++6.0的编程环境中实现
了插补算法的计算机仿真，验证了算法的正确性和可行性。(The high speed cutting is one of advanced manufacture technique,which has the powerful vitality and the broad application,and already became the mainstream of machining.The interpolation technology of NC is the foundation of path s control in the CNC system,and the interpolation operation is the core module of
CNC system software,which comes the motion control true.The interpolation
algorithm,whose function is good or bad,directly influences the performance of CNC system.So,a kind of interpolation method with the high accuracy and high speed is the key of interpolation.
Based on analyzing the traditional pulse interpolation and data sampling
interpolation,this paper emphasizes on the NURBS curve real-time interpolation
technology.In view of the partial algorithms which is incomplete and the low efficiency,this paper propose a simple and quick interpolation algorithm.Using the
matrix representation of NURBS curve,the whole interpolation process is divided into appropriate pretreat)
- 2011-07-07 11:46:17下载
- 积分：1
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1
说明： 结构随机振动，很经典的英文原版课本。Random Vibrations Analysis of Structural and Mechanical Systems(Random Vibrations Analysis of Structural and Mechanical Systems)
- 2016-07-26 12:31:15下载
- 积分：1
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SILBERSCHATZsolution
Solution SILBERSCHATZ
- 2009-04-27 06:24:40下载
- 积分：1
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DigitalLogicCircuits
此文件为数字逻辑电路课件，内容丰富，课件重点鲜明，PPT格式。(this paper to digital logic circuits courseware, rich in content, courseware focused and PPT formats.)
- 2007-04-25 16:22:46下载
- 积分：1
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compressandforward
文章简要的介绍了目前较新的压缩转发技术，compress-and-forward技术在现今研究较热门，相关的人员可以看看。(This paper addresses cooperative Time Division Duplex (TDD) relaying in the multiple-antenna case with full Channel State Informatio(CSI),assuming perfect knowledge of all channels.The main focus of the
paper is on the Compress-and-Forward (CF) strategy, for which an achievable rate on the Gaussian MIMO relay
channel can be derived by applying distributed vector compression techniques.)
- 2010-01-05 19:23:53下载
- 积分：1
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QFM-Signal-Parameters-Estimation
基于维格纳分布
线性正则变换及其应用
QFM信号参数估计(The Wigner-Ville Distribution Based on
the Linear Canonical Transform and Its Applications for
QFM Signal Parameters Estimation)
- 2016-12-31 10:44:48下载
- 积分：1
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ARM指令集
说明： arm architecture document. nice book. welcome to download
- 2020-06-20 21:20:02下载
- 积分：1
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算法图解.pdf
本书示例丰富,图文并茂,以简明易懂的方式阐释了算法,旨在帮助程序员在日常项目中更好地利用 算法为软件开发助力。前三章介绍算法基础,包括二分查找、大 O 表示法、两种基本的数据结构以及递归 等。余下的篇幅将主要介绍应用广泛的算法,具体内容包括 :面对具体问题时的解决技巧,比如何时采用 贪婪算法或动态规划 ;散列表的应用 ;图算法 ;K 最近邻算法。
本书适合所有程序员、计算机专业相关师生以及对算法感兴趣的读者(This book is rich in examples and illustrates algorithms in a concise and easy-to-understand way. It aims to help programmers make better use of algorithms in daily projects to help software development. The first three chapters introduce the basic algorithms, including binary search, large O representation, two basic data structures and recursion. The rest of the paper will focus on the widely used algorithms, including: when to use greedy algorithm or dynamic programming, hash table application, graph algorithm, K nearest neighbor algorithm when facing specific problems.
This book is suitable for all programmers, computer-related teachers and students, and readers interested in algorithms.)
- 2020-06-20 19:00:02下载
- 积分：1
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plc
关于西门子s7—200系列的课件，主要介绍了他的编程及工业中的应用(About Siemens s7-200 series of courseware, the main introduction of his programming and Industrial Application)
- 2009-03-08 15:36:16下载
- 积分：1
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LMI02_ekolab
information very interesting
- 2013-05-17 03:50:53下载
- 积分：1
