基于PCI总线的DSP伺服控制卡的研究与设计

通过对DSP芯片(TMS320VC33)、PCI9052接口芯片和伺服控制卡的功能和结构特点进行深入分析,设计了一种基于PCI总线的DSP伺服控制卡.实践证明,本文所设计的伺服控制卡能够满足目前控制系统的性能要求.     

基于CH365的PCI微机控制卡的设计与实现

文章介绍了一种采用CH365芯片实现32位高速PCI总线到ISA总线平滑转换的微机控制卡的设计方法,阐述了CH365芯片的特点,并以SEU-88微机控制系统的PCI微机控制卡为例,进行了电路设计,给出了PCI微机控制卡制作过程中的注意事项。实际应用表明,该PCI微机控制卡具有稳定性好、成本低、易制作等优点。     

基于PCI和FPGA的通用伺服控制卡设计

介绍了基于PCI和ALTERA的现场可编程门阵列(FPGA)进行设计的通用伺服控制卡.PCI局部总线由FPGA完成控制.FPGGA中自动完成模拟量输入的采集与存储及模拟量的输出接口,控制卡设计了CAN总线接口.在控制卡中配备了在数字频率口、同步串口通讯、异步串口通讯等多种伺服控制可能用到的数字接口模块,可以根据实际需要进行配置使用,保证了控制卡通用性.该设计具有实时性强、通用性好、应用灵活等特点.     

PCI9052及其在通用网络控制卡设计中的应用

本文简要介绍了PCI协议从模式接口芯片PCI9052特点，并说明了EEPROM配置注意事项，最后结合51单片机将其应用于通用网络控制卡设计课题，介绍了控制卡工作原理，并给出了软硬件结构设计。     

基于F28M36的EtherNet/IP从站设计

分析了一种全新的工业以太网协议EtherNet/IP,并从源代码的角度阐明了其基本原理。基于TI的DSP+ARM双核芯片F28M36设计了一款采用以太网传输的伺服控制系统控制卡,移植了UCOSII操作系统、CIP协议、嵌入式TCP/IP协议和网络芯片驱动,最终实现了工业以太网协议EtherNet/IP协议的成功移植。     

基于DSP的PCI通用运动控制卡的硬件设计

本文提出了一种基于TMS320F2812的PCI总线通用运动控制卡的设计方案.详细介绍了运动控制卡的硬件结构,并对控制卡的配置进行了深入分析,给出了具体的配置参数.最后,介绍了板卡驱动程序的设计方法.采用DSP和PCI结合的方式,实现了上下位机的高速通讯,并充分发挥了DSP强大的运算能力和极高的处理速度,以保证控制卡对实时性和精度的苛刻要求.     

基于FPGA的高速PCI伺服控制卡的实现

针对多轴运动数控系统的工作特点和发展趋势,提出一种基于FPGA的PCI局部总线的步进电机伺服控制卡设计.设计中采用了适合FPGA的直线插补和梯形加减速控制算法.该控制卡应用于重庆某精密机械公司的工业标记系统,能够驱动256细分的驱动器平稳运行,噪声小.     

基于DSP的PCI接口设计与实现

PCI总线是目前应用最广泛的并行总线之一,DSP芯片在数字信号处理领域也有着广泛的应用,但目前大部分DSP芯片不支持PCI总线接口,无法与其他PCI总线设备通信。因此文中以DSP芯片外部存储器总线为接口设计实现了一种基于FPGA的PCI总线接口控制逻辑,通过在FPGA内集成EMIF总线接口、PCI总线接口、控制转换逻辑和一块用于数据管理的DPRAM,使DSP芯片可直接通过PCI总线访问外部设备并响应其他PCI设备发来的操作,实现通过PCI总线进行数据交互,扩展了DSP芯片的应用范围。     

基于DSP的PCI接口设计与实现

PCI总线是目前应用最广泛的并行总线之一,DSP芯片在数字信号处理领域也有着广泛的应用,但目前大部分DSP芯片不支持PCI总线接口,无法与其它PCI总线设备通信。因此本文以DSP芯片外部存储器总线为接口设计实现了一种基于FPGA的PCI总线接口控制逻辑,通过在FPGA内集成EMIF总线接口、PCI总线接口、控制转换逻辑和一块用于数据管理的DPRAM,使DSP芯片可直接通过PCI总线访问外部设备并响应其它PCI设备发来的操作,实现通过PCI总线进行数据交互,扩展了DSP芯片的应用范围。     

基于DSP和CPLD的开放式机器人控制器

设计了一种新型的基于DSP和CPLD的开放式机器人控制器。该控制器以IBM-PC为上位计算机,用一块DSP运动控制卡对PR教学机器人的4个关节运动进行伺服控制,采用PCI总线进行上、下位机之间的通讯,实现双速率运行,较好地实现了机器人的实时控制。同时,在控制卡中采用参数自调整模糊控制算法,以提高系统控制精度和动态性能。实际应用表明,该控制器实现了机器人控制系统的高速率实时控制,增强了系统的鲁棒性和抗干扰能力,取得了良好的效果。     

Only connect: teaching, technology and telesis

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.     

European Community policy and the market

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.     

一种自适应子融合集成多分类器方法

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。     

Avoiding semantic and temporal gaps in developing software intensive systems

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.     

Designing economic np control charts: A programmed simulation approach

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.     

The development of robot art

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     

Explanation and prediction: an architecture for default and abductive reasoning

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.     

Three Process Perspectives: Organizations, Teams, and People

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.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。