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实时Linux在数控系统中的应用研究 总被引:2,自引:0,他引:2
介绍了Linux操作系统的特点,分析了实时Linux实现的基本原理和方法,然后对实时系统下的编程方法作了简要讲解,最后阐述了Linux下的多任务调度机制,给出了一个基于实时Linux的多任务的数控系统软件结构。 相似文献
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针对嵌入式数控系统在应用上的实时性能的需求,将Xenomai应用到嵌入式数控系统平台,使嵌入式数控系统中的Linux拥有实时微内核,并以此为基础,在Xenomai域规划数控系统的实时任务模块。最后通过对Xenomai的任务响应延时测试,测试结果表明Xenomai的任务响应时间在130μs以内,在内核态的实时性表现更为出色且小于73μs,能很好的满足数控系统的实时控制需求。 相似文献
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利用PC104的模块组和嵌入式Linux操作系统构建了工业色谱仪的测控分析系统.针对该测控分析系统多任务和实时性的要求,根据各任务实时性的差异,提出一套混合进程调度策略:实时性要求最高的任务采用硬件中断方式,实时性要求中等的任务设置为Linux下的实时进程,实时性要求最低的任务则为Linux下的普通进程.通过采用这种方式,满足了实时多任务处理要求,提高了工业色谱仪测控分析系统的整体性能,并且大大降低了其开发复杂性和成本. 相似文献
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实时Linux下数控系统多任务的结构与实现 总被引:3,自引:0,他引:3
分析了实时Linux的实时特性和多任务调度,结合数控系统的特点,提出了实时Linux下数控系统多任务管理的基本结构和实现途径。 相似文献
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分析了目前Linux实时化的主要技术方法和研究进展,通过从内核抢占机制、中断控制、细化时钟粒度及实时调度策略几方面深入研究,实现了一种双内核的Linux实时化方案,实验结果显示,以微小的代价有效地提高了Linux的实时性能。 相似文献
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软PLC是开放式数控系统中的重要组成部分。在基于SERCOS的开放式数控系统硬件的基础上,构建了软PLC的软件平台,成功地开发出软PLC系统。 相似文献
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基于PC的开放式数控系统已经成为数控发展的主流,但PC机应用于工业控制领域存在不稳定、高成本、大体积等缺点.基于这样的现状,研究了基于PC/104工业主板和MCX314控制芯片的数控系统的硬件平台构建,设计了基于实时嵌入式Linux的软件平台的体系结构,研究了嵌入式数控系统软件功能模块的划分方案、任务调度机制及主功能模块的实现策略,并在实现按轨迹返回功能的同时,提出了加工程序存储区和返回程序存储区之间控制权交换的概念.实践证明,将实时嵌入式Linux应用于开放式数控系统,可以满足数控机床的加工要求. 相似文献
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智能传感器网络技术是IT领域的一个研究热点.论文简要介绍了智能传感器网络中描述传感器与网络适配器之间硬件和软件接口的IEEE1451.2标准,并依据此标准,介绍了一种基于嵌入式Linux的通用TⅡ接口驱动的软件设计与实现方案. 相似文献
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详细地介绍了微机数控系统实时操作控制功能的设置原理和处理方法,并设计了相应的STD总线型硬件及软件处理模块。 相似文献
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This paper presents the past and focuses on present use of real time process information in petrochemical plants and refineries. During the past 20 years, technology has furnished tools to install increasingly sophisticated information systems to address the need of process and management information. In general, older systems were costly to install, expensive to maintain, and failed to provide true application drive integration. Examples from operating refineries are presented in this paper to show how competitive pressures and re-engineering are yielding innovative solutions to satisfy information need. As standard Microsoft-compliant tools are used coupled with standard hardware platforms, costs are plummeting while true integration of all process real time information is being achieved efficiently. A new paradigm, “Functional User Interface” (FUI) is replacing numerous home-grown GUIs (Graphical User Interface) to bring “on time information” with high resolution for sophisticated decision making. 相似文献
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原自动化仓库实时监控系统大多数是在DOS环境下编程,实际应用中存在一些不足,如:与下位机数据变换困难,图形欠佳,界面不友好等,本文介绍在WINDOWS环境下的实时监控系统特点,通讯可靠性的实现方法以及编程体会。 相似文献
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本文介绍了一个水流量实时信息计算机管理的设计与实施,分析Windows与DOS两种应用程序设计方法的区别,阐述了应用软件设计思想,设计要点及单相实现后台测量原理与方法; 相似文献
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将AGV控制系统作为FMS控制系统中的一个通用组件来研究其建模与设计方法.首先,采用面向对象Petri网建模技术建立了AGV控制组件的动态模型.其次,进行了AGV控制组件与FMS中其它组件的基于CORBA的通信接口的定义.在此基础上,为了使AGV控制组件具有良好的维护性、重用性和柔性,建立了AGV控制组件的面向对象类的统一建模语言(UML)模型.最后进行了AGV控制组件设计和开发. 相似文献
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In this paper a method for fault detection and diagnosis (FDD) of real time systems has been developed. A modeling framework termed as real time discrete event system (RTDES) model is presented and a mechanism for FDD of the same has been developed. The use of RTDES framework for FDD is an extension of the works reported in the discrete event system (DES) literature, which are based on finite state machines (FSM). FDD of RTDES models are suited for real time systems because of their capability of representing timing faults leading to failures in terms of erroneous delays and deadlines, which FSM-based ones cannot address. The concept of measurement restriction of variables is introduced for RTDES and the consequent equivalence of states and indistinguishability of transitions have been characterized. Faults are modeled in terms of an unmeasurable condition variable in the state map. Diagnosability is defined and the procedure of constructing a diagnoser is provided. A checkable property of the diagnoser is shown to be a necessary and sufficient condition for diagnosability. The methodology is illustrated with an example of a hydraulic cylinder. 相似文献
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This paper presents modeling and study of 12-pulse HVDC (High Voltage Direct Current) based on real time simulation where the HVDC inverter is connected to a weak AC system. In goal to study the dynamic performance of the HVDC link, two serious kind of disturbance are applied at HVDC converters where the first one is the single phase to ground AC fault and the second one is the DC link to ground fault. The study is based on two different mode of analysis, which the first is to test the performance of the DC control and the second is focalized to study the effect of the protection function on the system behavior. This real time simulation considers the strength of the AC system to witch is connected and his relativity with the capacity of the DC link. The results obtained are validated by means of RT-lab platform using digital Real time simulator Hypersim (OP-5600), the results carried out show the effect of the DC control and the influence of the protection function to reduce the probability of commutation failures and also for helping inverter to take out from commutation failure even while the DC control fails to eliminate them. 相似文献
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基于实时波前信息的图像复原 总被引:1,自引:0,他引:1
提出了一种基于PIX总线的千单元可扩展波前探测图像恢复技术.采用波前探测与图像恢复相结合的方式来克服大气扰动和系统像差对图像分辨率的影响,满足大型地基望远镜高分辨率成像的需求.首先利用波前探测的方法得到波前相位畸变量,再由此恢复退化图像.其核心部件-波前处理器则采用波前处理主板和可扩展的波前处理子板相结合的方式来满足不同光学系统对波前处理规模的需求,波前空间采样散可扩展至千单元数量级.系统在室内进行了激光光源图像恢复实验,使激光光源的能量集中度提高50%左右;在室外对恒星和0.6″的双星图像进行了恢复,其半高全宽下降了约80%.系统采用大规模现场可编程门阵列(FPGA)作为波前处理的核心器件,实现了波前探测的实时处理和透过大气成像的退化图像的高分辨率图像恢复. 相似文献