嵌入式网络化测控系统的设计与实现

【作者】 刘生华；

【导师】 何鹏举；

【作者基本信息】 江西理工大学 ， 控制理论与控制工程， 2008， 硕士

【摘要】 网络化测控是现代测控技术的发展方向之一。嵌入式系统是一个技术密集、高度分散、不断创新的知识密集型系统。嵌入式网络化测控系统是计算机技术、通信技术、半导体技术、微电子技术和测控对象相结合的系统,反映了目前最新技术的先进水平。本文根据网络化测控、嵌入式系统的特点和工程实际的具体要求,设计和实现了一种嵌入式网络化测控系统。论文主要进行了如下研究工作:1、设计出了一种嵌入式网络化测控系统。网络化测控系统中的传感器、执行器和控制器都是网络中的一个节点,基于这个特点和传感器节点、执行器节点和控制器节点在测控系统中所承担的任务,进行软件设计和硬件选型,在综合分析和研究的基础上得出了嵌入式网络化测控系统的实现方案;2、传感器节点的设计和实现。传感器节点采用8位单片机ADuC832作为网络传感器的微处理器,网络接口选用以太网络芯片RTL8019AS,并扩充了一片32K的RAM。软件系统采用了嵌入式实时操作系统μC/OS-II,在网络通信协议为μIP的支撑下,应用嵌入式web技术、CGI技术和Java Applet实现了网络化数据的实时采集和传输;3、控制器节点的体系结构和实现技术。控制器节点由硬件、系统支撑软件、控制算法、实时数据处理程序和应用程序5个部分构成。利用32位的ARM微处理器LPC2210设计了带有存储器接口、网络接口和其它外围接口的硬件平台,然后在该平台上移植了开源免费的嵌入式操作系统μCLinux,在μCLinux的管理下实现了测控程序,并添加动态的Web Server做为远程人机交互接口界面。4、网络控制算法研究。以太网应用到测控系统中存在传输时延不确定、数据丢包、噪声干扰等一系列问题,针对这个问题,本文提出基于DMC(动态矩阵控制)的时延补偿方案,并在Matlab环境中利用TrueTime工具箱进行网络仿真,仿真结果证明了算法的可行性。在上述工作的基础上,结合相关的学校课题和企业项目,已研制相应的产品和工程样机应用在工程实践中,验证了本文相关的技术实现和设计方法是正确可行的。更多还原

【Abstract】 Networked measure and control is the one of modern measure and control technology development directions. Embedded system is a knowledge dense, extremely dispersible and ceaselessly innovative system. Embedded networked measure and control system is a combined system of computer technology, communication technology, semiconductor technology microelectronics technology and measured and controlled object, which reflect current highest level technology. According to the embedded measure and control system characteristic and practice detailed needings, in this paper, embedded networked measure and control system is designed and implemented. The main work in this paper is as followed:1. Embedded networked measure and control system is designed. The sensor, actuator and controller are all nodes in networked measure and control system. Software design and hardware selection have been carried through. The implementation of Embedded networked measure and control system has been gotten base on integrated analyse and research.2. The design and implementation of sensor node. This sensor node adopt 8-bit MCU ADuC832 as networked sensor processor, RTL8019AS as Ethernet interface chip, and expand a 32K RAM chip. Software system choosesμC/OS-II as embedded RTOS. After applying CGI, Java Applet technology, real-time data are collected and transmitted base on network communication protocolμIP.3. The architecture and implementation technology of controller node. Controller node is composed of hardware, software, control algorithm, and application programmer. Hardware platform is designed with 32-bit microprocessor LPC2200, memory interface, network interface and other peripheral. Free open source embedded OSμCLinux has been ported on the hardware platform. And finally, dynamic web server interactive interface is added.4. Research on network control arithmetic. Measure and control system applied Ethernet present a serial of problems of uncertain transmit time-delay, data package missing and so on. To resolve these problems, this paper put forward solutions of time-delay compensation base on DMC. The result of simulation indicates the solutions’feasibility under matlab/simulink environment with TrueTime toolbox.Base on these works and combined with related school subject and enterprise project, product and sample have been manufactured and put into practice. All of these prove the implementation and design method in this paper is feasible.更多还原