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基于以太网技术的索网反射面控制系统的网络化研究

发布时间:2018-09-18 10:28
【摘要】:在超大口径球面射电望远镜(Five-hundred-meter Aperture Spherical Telescope, FAST)计划中,索网反射面的精确动态成型是通过各个节点控制器精确控制下拉索的长度实现的,针对FAST整体索网反射面上众多节点的控制系统,网络化设计是其首选方案。为了实时调整索网的节点,选择一种合适的数据传输方式、建立可靠高效的网络体系结构是实现整体反射面正常工作的关键技术之一,由于以太网技术是一种成熟的信息网络技术,具有组网灵活,稳定和可靠等诸多优点,故在本控制系统中,采用了以太网技术。本论文对基于以太网技术的索网反射面控制系统的网络化研究进行了详细的介绍。 首先,对课题的研究背景及国内外研究现状进行了介绍,接着对以太网技术、TCP/IP协议及嵌入式技术等一些关键技术进行了研究,在此基础上提出了基于以太网技术的索网反射面控制系统网络化的总体设计方案,本文提出的方案是基于多端口的网络化节点方案。网络化节点的多端口使整个控制系统的各个节点组网方式更加灵活。在通信过程中采用分层结构,实现多层分布式传输。另外两个节点之间连接冗余链路,提高整个网络的抗毁性。 其次,根据嵌入式技术的特点,完成了以MC9S12NE64为主控芯片,以RTL8309SB为交换芯片的索网反射面控制系统的网络化节点设计方案,包括硬件设计和软件设计两个方面。其中硬件方面包括电源模块、主控芯片模块、MII(Media Independent Interface,介质无关端口)接口模块、SPI(Serial Peripheral Interface,串行外设接口)接口模块、交换芯片模块、网络变压器模块、RJ45接口模块和LED显示电路模块的设计与制作。这些模块一起组成了多端口的网络化节点的硬件结构。软件设计则给出了网络化节点各个软件功能模块的设计与具体实现,包括交换模块驱动程序的实现,MII接口程序的实现,TCP/IP(Transmission Control Protocol/Internet Protocol,传输控制协议/网际协议)协议的实现,SPI接口程序的实现以及上位机网络通信程序的实现。这些功能模块的设计组成了整个系统的软件设计。 最后,对系统的硬件和软件进行了调试,经过实际运行和测试,达到设计要求。
[Abstract]:In the very large aperture spherical radio telescope (Five-hundred-meter Aperture Spherical Telescope, FAST), the precise dynamic shaping of the cable mesh reflector is realized by the precise control of the length of the cable by each node controller. Network design is the first choice for the control system of many nodes on the reflecting surface of FAST cable net. In order to adjust the nodes of the cable network in real time, it is one of the key technologies to realize the normal operation of the whole reflector by choosing a suitable data transmission mode and establishing a reliable and efficient network architecture. Because Ethernet technology is a mature information network technology, it has many advantages such as flexible, stable and reliable, so the Ethernet technology is adopted in this control system. In this paper, the network research of cable-net reflector control system based on Ethernet technology is introduced in detail. First of all, the research background and domestic and foreign research status are introduced, and then some key technologies, such as Ethernet technology, TCP / IP protocol and embedded technology, are studied. On this basis, the overall network design scheme of cable network reflector control system based on Ethernet technology is proposed. The scheme proposed in this paper is a network node scheme based on multi-port. The multi-port of the network node makes the network way of each node of the whole control system more flexible. In the process of communication, multi-layer distributed transmission is realized by using hierarchical structure. The other two nodes connect redundant links to improve the survivability of the whole network. Secondly, according to the characteristics of embedded technology, the network node design scheme of cable network reflector control system with MC9S12NE64 as main control chip and RTL8309SB as switch chip is completed, including hardware design and software design. The hardware includes the power supply module, the main control chip module and the MII (Media Independent Interface, medium independent port) interface module, the SPI (Serial Peripheral Interface, serial peripheral interface module, the switching chip module, the main control chip module, the MII (Media Independent Interface, medium independent interface module, the SPI (Serial Peripheral Interface, serial peripheral interface module and the switching chip module. Design and manufacture of network transformer module RJ45 interface module and LED display circuit module. These modules together form the hardware structure of multi-port networked nodes. The software design gives the design and implementation of each software function module of the network node. It includes the realization of switch module driver and the realization of TCP / IP (Transmission Control Protocol/Internet Protocol, transmission control protocol / Internet protocol, as well as the realization of host computer network communication program. These functional modules constitute the software design of the whole system. Finally, the hardware and software of the system are debugged and tested to meet the design requirements.
【学位授予单位】:东北大学
【学位级别】:硕士
【学位授予年份】:2010
【分类号】:P111.44;TP273.5

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