扁平设备树FDT在ARM Linux中的应用研究

引入Flattened Device T ree(扁平设备树,FDT)到ARM Linux后,Linux内核可以通过FDT获取板级硬件的细节信息,这样就减少了Linux内核中arch/arm目录下大量描述板级硬件细节信息的冗余代码,把大多数与板级硬件特性相关的代码放在设备树文件和设备驱动中,提高了代码的复用性,避免了ARM Linux内核为支持新硬件进行大量修改,提高了ARM Linux板级支持的开发速度,也使得使用现有的内核镜像去引导具有相同芯片集的硬件平台成为可能.     

Distributed adaptive control for vehicular platoon with unknown dead‐zone inputs and velocity/acceleration disturbances

This paper is focused on designing a distributed adaptive control scheme for a vehicular platoon with unknown bounded velocity/acceleration disturbances and unknown nonlinear dead‐zone inputs. Our aim is to design distributed adaptive controllers based on integral sliding mode control techniques that guarantee practical exponential convergence (i.e., exponential stability of an arbitrarily small neighborhood of zero) of the spacing errors and the string stability of the whole vehicular platoon. The contributions of this paper are that: (i) based on a modified constant time headway policy, the whole vehicular platoon is guaranteed to have string stability despite dead zone inputs; (ii) adaptive compensation terms are constructed to compensate for the time‐variant effects caused by unknown bounded velocity/acceleration disturbances, and unknown dead zone inputs; (iii) an efficient numerical method for avoiding the singularity problem of the control law is also proposed. Numerical simulation results show the validity and advantages of the proposed method are significantly higher traffic density and string stability. Copyright © 2016 John Wiley & Sons, Ltd.     

Finite time control of robotic manipulators with position output feedback

This paper deals with the robust finite time tracking of desired trajectories for a wide group of robotic manipulators in spite of unknown disturbances, uncertainties, and saturations of actuators while only manipulator's positions are available and its velocities are not measurable physically. A new form of chattering‐free second order fast nonsingular terminal sliding mode control scheme is introduced to design input torques for fulfilling the determined tracking objective in the adjustable total finite settling time. The proposed control algorithm is incorporated with two nonlinear observers to estimate disturbances and velocities of joints within finite settling times. The global finite time stability of the closed‐loop manipulator is analytically proved. Finally, a numerical simulation is carried out to verify the effectiveness of the designed input torques. Copyright © 2017 John Wiley & Sons, Ltd.     

基于知识管理的远程训练模式探讨

本文依据我军继续教育现状,将训练内容划分为知识训练和技能训练,分析总结了一种适合部队的继续教育远程训练模式。在此基础上,以知识管理为支撑,设计一个军队继续教育远程训练平台。     

基于S3C6410处理器的嵌入式Linux系统移植

文章详细阐述了如何在基于S3C6410微处理器的目标板上搭建嵌入式Linux系统的方法。首先介绍嵌入式Linux的移植方法,接着介绍交叉编译环境的搭建,最后详细讨论了将BootLoader、Linux内核及根文件系统移植到$3C6410的过程。结果证明方法可行,重新搭建后的操作系统在目标板上运行稳定。     

国内外高等教育工学专业人才培养模式比较研究

随着社会主义市场经济的迅速发展,目前的高等教育工学专业的人才培养面临巨大的挑战。一方面,高速发展的经济需要大量的工学专业人才;另方面,大批的毕业生因不能适应企业需要而无法顺利就业。文章从培养目标、课程设置以及工程实践等方面对国内外的高等教育工学专业人才培养模式进行了比较研究。找出我国目前存在的问题,借鉴国外培养模式的优点,并结合国内高等教育工学专业人才培养的实际情况,提出了相应的对策。     

基于S3C6410处理器的嵌入式Linux系统的构建

嵌入式系统是计算机的一个重要分支,它在很多产业中得到了广泛的应用并逐渐改变着这些产业,而嵌入式系统构建是嵌入式系统开发中一个必不可少的部分。本文主要研究基于S3C6410处理器,通过TFTP服务器将Linux内核镜像文件下载到指定内存地址处,然后通过NFS服务器启动根文件系统,完成嵌入式Linux开发环境的构建。这种配置对嵌入式产品开发阶段非常有用。     

基于NFC技术的标签模式设计

设计上主要利用业界第一块标准的NFC功能芯片(PN544)来实现NFC技术中的标签模式。该标签模式是模拟ISO14443标准定义的Type A卡。与如今大部分的实现模式不一样的是:通过采用NXP公司的主控芯片(LPC1114)来直接配置PN544。该实现方法是根据NFC协议开发相应的驱动程序。使用SCM公司的读卡器(SDI011G)来验证标签模式的配置是否成功。如果是成功的配置,那么读卡器可以探测到PN544和LPC1114构成的设备。     

Road Friction Coefficient Real-Time Identification Based on the Tire Dynamic Friction Model

Road friction coefficient real-time estimation methods is an important issue and problem in automotive active safety con- trol system development. First a fixed feedback gain sliding mode observer of road adhesion coefficient is designed through the es-tablishment of tire/road dynamic friction model in this article. The simulation results shows that the observer can well real-time iden-tify the current road adhesion characteristics. And more importantly, the observer only need wheel speed signal and the braking torque （brake pressure） signal, so the system is low cost, and its adaptability is good. There is no doubt this estimation method has a good application prospect.     

产品制造过程信息控制管理系统的设计与开发

以作者所在单位产品制造过程信息控制管理系统为例,详细描述了系统的方案与设计,阐述了基于C/S结构的产品条码管理系统的设计及其实现的关键技术,介绍了该系统的各个功能模块及数据库的实现方法。