TMS320F28016的I~2C接口设计

详细介绍了DSP芯片TMS320F28016的I2C模块的特点,以及实时时钟ISL12026的功能特点。依据I2C的通信协议规范,给出了TMS320F28016和ISL12026之间的硬件电路连接和软件设计。相比于TMS320F2812的模拟I2C,提升了数据传输的效率,减少了CPU的占用时间。     

基于DSP实现的SPWM算法在光伏并网逆变器中的应用

介绍了TMS320F28335数字信号处理芯片生成SPWM波,采用等面积算法。先分析了单极性/双极性控制、同步/异步调制、对称规则和不对称规则采样生成SPWM波算法原理,然后运用TMS320F28335芯片进行波形实现,产生的SPWM波,具有速度快、精度高、对称性好等优点。     

DSP的I2C引导装载方法的研究与实现

I2C总线是一种标准的串行总线,在消费电子、工业控制等领域有着广泛的应用.本文以TMS320C6455 DSP芯片为例,详细介绍了如何利用I2C EEPROM实现DSP程序的引导装载.     

基于双DSP的自行车机器人控制系统设计

对前轮驱动自行车机器人的控制系统嵌入式硬件平台构建问题进行了研究,提出了一种以TMS320F28335数字信号处理器(DSP)为控制系统核心,以TMS320F2812数字信号处理器为信号采集模块,以C8051F020单片机为电机控制器,融合惯性测量单元、光电编码器、霍尔电流传感器,超声波传感器等多感知传感模块的前轮驱动自行车机器人嵌入式控制系统构架;利用F2812的片内外设采集传感器信号获得机器人内部状态及其外部的环境信息,构造CAN总线、SPI总线以及RS232总线在系统内进行数据通讯,通过F28335完成运动算法计算,并由C8051F020的PCA模块发出PWM信号驱动前轮电机和车把电机完成一个控制周期;样机试验表明,设计随动车架横滚角的控制器控制前轮速度和车把转角,构建的控制系统硬件可以使自行车机器人平衡行走超过5s.     

新型浮点型DSP芯片TMS320F283xx

德州仪器公司最近推出了工业控制领域首款浮点型数字信号处理器TMS320F283xx系列,该系列芯片在TI公司原有DSP的基础上添加了浮点运算内核,具有更加丰富的外设资源和更加出色的性能。详细介绍了该款芯片的结构特点、外设资源、浮点运算内核,并将TMS320F28335与目前广泛应用的TMS320F2812进行了性能对比。     

基于ADS1278的高精度采样平台的搭建

介绍了一种基于TI公司的模数转换器ADS1278和TMS320F28335型dsp构成的高精度采样平台,完成了dsp和模数转换器的接口电路及控制电路设计,具有多通道同步采样,高精度,低功耗等特点。     

基于TMS320F28335的异步电机DTC数字化实现

本文提出了一种以TI公司的TMS320F28335型32位浮点DSP为控制核心设计,在直接转矩控制原理的基础上,实现了对三相异步电机数字化控制.相对于采用传统的TMS320LF2407、TMS320F2812等定点型DSP,TMS320F28335具有抗干扰能力强、A/D精度高、响应速度快等优点.实验波形表明,以TMS320F28335为控制核心的异步电机直接转矩控制系统方便可靠、动态性能稳定.     

基于TMS320F28335的DSP最小系统设计

在各大专院校的课程教学、实验教学、毕业设计以及电子设计竞赛中,需要应用DSP实验系统。介绍了TI公司的TMS320F28335芯片的性能特点,给出了由TMS320F28335组成的DSP最小应用系统。详细介绍了各部分电路的设计方法。该系统可满足教学要求,也可用于简单的工程研究和应用开发。     

基于ADS8365的高速同步数据采集系统

针对TMS320F2812难以对多路信号进行同步采样,介绍了一种基于AD转换芯片ADS8365与TMS320F2812DSP芯片构成的高速、并行高精度数据采集系统,包括硬件接口电路的设计、部分关键程序代码和实现AD采样的程序流程。     

DSP系统的CAN总线远程升级方法

针对通过JTAG接口在外场升级DSP困难的问题,研究了一套基于CAN总线的远程升级方法。首先对DSP芯片TMS320F28335的硬件资源和启动过程进行了简要介绍和分析,接着说明了该方法的基本原理并提出了具体实现过程,最后通过工程证明该方法简便可靠,并对前景进行了展望。     

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。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.