$3C2510A的SCARA机械臂控制系统设计

在目前机械臂控制系统中,如何减小系统体积、降低系统功耗一直是传统控制方式（即“PC／工控机＋运动控制卡”）的难点。本文在对SCARA机械臂深入研究的基础上通过S3C25IOA实现了带有PCI接口的控制系统,并进行了Bootloader的移植以及PCI驱动程序的编写。     

海洋食品微生物生长智能通用预测平台

针对海洋食品对虾生产加工的特点,设计与开发了对虾生产加工中微生物生长智能通用预测平台,为海洋食品的安全生产与加工提供分析手段。     

A high quality and small shadow size visual secret sharing scheme based on hybrid strategy for grayscale images

Many secret sharing schemes for digital images have been developed in recent decades. Traditional schemes typically must deal with the problem of computational complexity, and other visual secret sharing schemes come with a higher transmission cost and storage cost; that is, each shadow size is m times as big as the original secret image. The new (2,n) secret sharing scheme for grayscale images proposed in this paper is based a combination of acceptable image quality using block truncation coding (BTC), high compression ratio discrete wavelet transform (DWT) and good subjective performance of the vector quantization (VQ) technique. Experimental results confirm that our proposed scheme not only generates a high quality reconstructed original image but also generates small, random-like grayscale shadows.     

A zonal RANS-LES method to determine the flow over a high-lift configuration

High Reynolds number flows are particularly challenging problems for large-eddy simulations (LES) since small-scale structures in thin and often transitional boundary layers are to be resolved. The range of the turbulent scales is enormous, especially when high-lift configuration flows are considered. For this reason, the prediction of high Reynolds number flow over the entire airfoil using LES requires huge computer resources. To remedy this problem a zonal RANS-LES method for the flow over an airfoil in high-lift configuration at Re_c=1.0×10⁶ is presented. In a first step, a 2D RANS solution is sought, from which boundary conditions are formulated for an embedded LES domain, which comprises the flap and a sub-part of the main airfoil. The turbulent fluctuations in the boundary layers at the inflow region of the LES domain are generated by controlled forcing terms, which use the turbulent shear stress profiles obtained from the RANS solution. The comparison with an LES solution for the full domain and with experimental data shows likewise results for the velocity profiles and wall pressure distributions. The zonal RANS-LES method reduces the computational effort of a full domain LES by approx. 50%.     

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This paper proposes a new paper distribution model based on traditional C/S model. This model makes full use of the network bandwidth and allows to download papers packet from other client, thereby effectively reduces the load of server. Experimental result shows that this model pays less time to download paper, it solves the problem of bottleneck when creating paper at the same time, makes the system running on inefficient network.     

基于ARM和TCP/IP Lean的智能家居控制器的研究

为了进一步提高人们的生活质量,设计了一种成本低廉、面向家庭的远程智能家居控制器,主要用于控制电灯,电冰箱、空调等家用电器的运行状态.采用ARM处理器S3C44B0作为核心处理单元,硬件平台由S3C44B0和以太网控制器CS8900等器件组成,软件主要以精简TCP/IP协议栈为核心,两者共同组建了嵌入式智能家居Web服务器.在网络畅通的情况下,用户通过点击嵌入在硬件平台的Web页面上的按钮来控制相应的家用电器.     

面向切面的数据验证组件研究与实现

传统的数据验证方法会造成数据验证代码纠缠在一起,使得软件的维护性与重用性大大降低.面向切面编程技术(AOP)可将应用程序中的"横切关注点"从"纵向关注点"中分离出来并被封装到一个可重用的模块中,再利用反转控制(IoC)实现数据验证逻辑与其它业务逻辑间的松散耦合.在此基础上具体构建了一个基于服务器端的数据验证组件All4Validate,并将其以低侵入的方式融入到现有的J2EE/EJB开发过程的组件产品中,有效地解决了传统数据验证方法的弊端,并极大地提高软件的开发效率.     

无人直升机悬停至前飞切换控制

模态切换控制是无人直升机实现全天候自主飞行的关键,实现飞行模态闯快速平稳的切换是无人直升机控制器设计的主要目的。针对无人直升机悬停至前飞过切换程时高度不能保持现象和对象无人直升机高度一航向通道之间存在耦合,提出了前飞速度和航向角速率补偿设计高度通道控制律,升降速度和总距风扇联动关系补偿设计航向通道控制律。最后通过大量仿真试验验证了此方法的可行性和有效性。     

智能关机模块的开发

针对目前许多的家用电器,如电视机、空调等长时间处于无人或人已经睡着时仍在工作,造成电能源的极大浪费和电器寿命的缩短。从而设计了一种智能关机模块,能识别是否有人或睡着,如果无人或人已经睡着能够自动关闭电源,从而实现节能和延长电器的寿命。给出了智能关机模块的硬件和软件的设计方法。通过实践证明,该智能关机模块具有稳定可靠、灵敏度高、能够很好地控制电器的实际需求。     

基于S3C2440和Windows CE5.0的嵌入式设备休眠唤醒技术研究

就休眠唤醒技术实现过程中的难点进行了深入研究,并针对S3C2440开发板提出了两种可行的低功耗休眠模式唤醒实现方法:外部中断唤醒和RTC中断唤醒.将这两种方法应用于一款基于S3C2440和WindowsCE 5.0的嵌入式智能巡检分析诊断仪,仪器运行稳定、效果理想.