总数:290 | 当前第26/29 首页 上一页 ... 20 21 22 23 24 25 26 27 28 29 下一页 尾页
[第31讲]驱动程序IO口(1)
Linux内核把驱动程序划分为3种类型:字符设备、块设备和网络设备 。在uClinux 内核编写驱动程序并不像其他操作系统那么复杂,实际上,所要做的只是为相应的设备编写几个基本函数并向VFS(virtual file system)注册即可。当上层应用要使用该设备时,VFS 就会调用相应的设备函数。设备驱动程序通常可归为以下3 类:a) 块设备(block) ,以块为单位,允许随机访问,多用缓存技术;b) 字符设备(char) ,以字节为单位,只能按顺序访问,不用缓存;c) 网络接口(net) 。
  1. 2009/11/2
  2. 人气(5352)
  3. 星级(10)
  4. 评论(0)
带有鳍形夹具的仿生三角架—多方位运动和自动抓取
仿生三角架利用了自然界中鱼鳍的结构,首次将三维空间应用到空中企鹅和水下企鹅项目中,以便实现高效和多方位的自动化。三个可扩展伸缩的金丝玻璃纤维杆降低了需要被替换的量,同时允许最大90度的运动。BionicTripod with FinGripper versatile movement and adaptive grasping The BionicTripod makes use of the bionic Fin Ray® structure, which was transferred to three-dimensional space for the first time in the AirPenguin and AquaPenguin projects for efficient, versatile automation. Three extendible and retractable filigree fibreglass rods reduce the mass to be displaced, while allowing a maximum scope of movement of up to 90 degrees.
  1. 2009/10/29
  2. 人气(7027)
  3. 星级(10)
  4. 评论(0)
水下企鹅AquaPenguins_Festo仿生技术
水下企鹅- 技术-水下自动运载工具AquaPenguins - technology-bearers as autonomous underwater vehicle.与它自然界的原型一样,来自费斯托(Festo)公司的水下企鹅具有一个带水动力的身体轮廓。其优雅的推进力以及其可向各个方向移动的机翼头部和尾部,让机器人企鹅可以在狭窄的空间条件下自由穿行,并且在必要时及时出现甚至可以向后游——这一点可不像它们的自然界的原型。 仿生企鹅设计成水下自动运载工具,可以自由定位并且可在水池中穿行。这种工具有一个3D的海豚音声纳系统,使得“企鹅”可以与周围的伙伴们交流,比如避免互相碰撞。Like its natural archetype, the AquaPenguin from Festo has a hydrodynamic body contour. Its elegant wing propulsion and its head and tail sections, which can be moved in all directions, allow the robotic penguins to manoeuvre in cramped spatial conditions, to turn on the spot when necessary and – unlike their biological counterparts – even to swim backwards. The bionic Penguins are designed as autonomous underwater vehicles that independently orient themselves and navigate through the water basin. They are supported by a 3D sonar system which, as with dolphins, allows communication with their surroundings and with other robotic penguins – for example to avoid collisions.
  1. 2009/10/22
  2. 人气(7150)
  3. 星级(10)
  4. 评论(0)
pgu端子的功能(一)下
第一讲:介绍了FX1N系列和FX1S系列PLC的定位控制指令的应用,利用这些指令,可以做到简易的。最低成本的定位控制。
  1. 2009/7/23
  2. 人气(5891)
  3. 星级(10)
  4. 评论(0)
Wonderware Application Server 2.1 Upgrade
Teacher:Juan Carlos Garcia Principal Instructor(主讲) Agenda(议程): Module1:Course Introduction(绪论) *Section1:Course Introduction Module2:Hardware and Software Requirements(软硬件环境要求) *Section1:Hardware Requirements *Section2:Software Requirements Module3:Upgrade Procedure(升级过程) *Section1:Upgrade Steps(升级步骤) *Section2:Upgrade Demo(升级示例) Module4:Licensing(许可) *Section1:Wonderware Application Server Licensing(许可) Module5:Conclusion(结论) *Section1:Additional Resources(更多资料)
  1. 2009/7/13
  2. 人气(7895)
  3. 星级(10)
  4. 评论(0)
wonderware Application Server 2.1 Installation
Teacher:Juan Carlos Garcia Principal Instructor(主讲) Agenda(议程):Module1:Course Introduction(绪论) *Section1:Course Introduction *Section2:Review of Wonderware Application Server *Section3:Application Server Topology(应用软件服务器布局) Module2:Hardware and Software Requirements(软硬件环境要求) *Section1:Hardware Requirements *Section2:Software Requirements Module3:Installation Procedure(安装过程) *Section1:Installation Components(安装组件) *Section2:Installation Steps(安装步骤) *Section3:Installation Demo(安装示例) Module4:Licensing(许可) *Section1:Wonderware Application Server Licensing(许可) Module5:Conclusion(结论) *Section1:Summary and Additional Resources(概要与更多资料)
  1. 2009/7/13
  2. 人气(9836)
  3. 星级(10)
  4. 评论(1)
  1. 2009/7/8
  2. 人气(24190)
  3. 星级(10)
  4. 评论(61)
S7-200积算定时器和常量
S7-200积算定时器和常量
  1. 2009/7/8
  2. 人气(11021)
  3. 星级(10)
  4. 评论(1)
S7-200定时器TON TOF
S7-200定时器TON TOF
  1. 2009/7/5
  2. 人气(12354)
  3. 星级(6)
  4. 评论(2)
S7-200可加可减计数器
S7-200可加可减计数器
  1. 2009/7/5
  2. 人气(10211)
  3. 星级(6)
  4. 评论(1)
总数:290 | 当前第26/29 首页 上一页 ... 20 21 22 23 24 25 26 27 28 29 下一页 尾页