共查询到20条相似文献,搜索用时 109 毫秒
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S1240程控数字交换机系统的软硬件结构江西省邮电学校陈百建在上一讲中,着重介绍了程控数字交换机的原理,并对分级控制的代表机型F—150软硬件结构作了简介。本讲将针对程控交换机S1240系统进行软硬件结构的介绍。一、S1240数字程控交换机系统概述S... 相似文献
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基于无线的高压输变电的温度测量系统设计 总被引:1,自引:0,他引:1
介绍了一种基于无线的高压输变电节点温度测量的系统,详细介绍了该温度测量系统中温度探头的软硬件设计。硬件平台设计采取TI公司MSP430系列单片机加nRF905无线收发芯片的结构,软硬件的设计符合温度探头的低功耗和耐高压、高低温的设计要求。最后,就温度探头的功耗分析给出了其测量方法和测试结果。本系统设计采取无线传输和电池供电方式,解决了传统高压线节点只能通过红外枪检测的问题。该测温系统已经在高压输变电系统上得到了运用。 相似文献
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本论文简要介绍了预烧料自动定量包装系统的主要工艺流程、基本设计要求、软硬件设计思路,在此设计基础上成功研究和开发了预烧料自动定量包装系统并应用于梅山预烧料包装系统中。 相似文献
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本文介绍的微机励磁调节器实验仿真平台,包括硬件仿真平台和软件仿真平台。硬件仿真平台是用Proteus对微机各个功能模块的硬件进行仿真,软件仿真平台是利用软件开发环境和硬件仿真平台一起进行的软件各个模块的开发和验证。本文还通过举倒介绍硬件仿真模块的应用和软件仿真模块的功能。硬件仿真平台和软件仿真平台联合仿真能够模拟微机励磁实验,可以辅助实验教学。 相似文献
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基于Markov过程的硬/软件综合系统可靠性分析 总被引:5,自引:0,他引:5
现代大型监控系统通常是一个复杂的硬/软件综合系统,其可靠性分析对于系统的设计、评估具有重要意义.综合考虑硬件、软件特点以及两者之间的相互作用关系,提出一种基于Markov过程的综合系统可靠性分析模型,模型中将系统失效分为硬件失效、软件失效与硬/软件结合失效.实际应用中,由于系统的状态数较大,提出利用循环网络方法对Markov状态转移方程进行求解,从而方便地得到系统处于各状态的瞬时概率与稳态概率.通过分析硬/软件综合系统可靠度、可用度与系统可靠性参数之间的关系,指出硬/软件结合失效将影响系统可用度,忽略硬/软件结合失效将导致可靠性估计值偏离实际值. 相似文献
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This paper presents a quantitative reliability analysis of a system designed to tolerate both hardware and software faults. The system achieves integrated fault tolerance by implementing N-version programming (NVP) on redundant hardware. The system analysis considers unrelated software faults, related software faults, transient hardware faults, permanent hardware faults, and imperfect coverage. The overall model is Markov in which the states of the Markov chain represent the long-term evolution of the system-structure. For each operational configuration, a fault-tree model captures the effects of software faults and transient hardware faults on the task computation. The software fault model is parameterized using experimental data associated with a recent implementation of an NVP system using the current design paradigm. The hardware model is parameterized by considering typical failure rates associated with hardware faults and coverage parameters. The authors results show that it is important to consider both hardware and software faults in the reliability analysis of an NVP system, since these estimates vary with time. Moreover, the function for error detection and recovery is extremely important to fault-tolerant software. Several orders of magnitude reduction in system unreliability can be observed if this function is provided promptly 相似文献
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提出了一种基于嵌入式系统的动漫游戏系统设计方案,系统包括硬件电路设计和软件设计。硬件电路以ARM微控制器STM32F103作为主控制器,并采用AmazonLF芯片进行多媒体处理,以上两种处理器和外设电路一起组成了系统的硬件架构。软件系统则由硬件驱动程序、uC/OS-II实时操作系统、游戏系统应用程序等部分组成。在应用程序设计中,图像显示部分采用了多图层机制显示方法,从而减少了Amazon-LF芯片处理负荷并提高了整个游戏软件系统的稳定性。最终通过对软件和硬件的优化设计,成功实现了动漫游戏系统的设计。 相似文献
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单片机应用系统仿真策略的研究 总被引:8,自引:1,他引:7
针对大中专院校开设的《单片机原理与接口技术》课程实验教学环节中,单片机硬件容易损坏及维护问题,研制开发了单片机硬、软件系统的仿真软件。他将完全取代单片机硬件仿真器和单片机汇编语言仿真软件.取而代之的是以PC机为平台,基于VB的可视化界面、事件驱动原理,在VB的环境下,实现对单片机系统软件的模拟和硬件电路的仿真。本文阐述了一种基于离散事件系统仿真原理的单片机系统仿真软件的仿真策略。采用进程交互法对单片机的硬、软件系统实现了仿真。 相似文献
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设计了以STC89S52单片机为处理器的电子密码锁,其系统软件采用RTX51多任务操作系统实现。从硬件和软件两方面讨论了电子密码锁的设计。本设计将RTX51应用到电子密码锁,增强了系统的实时性和可靠性,提高了开发效率,使系统易于维护和升级,具有一定的实用价值。 相似文献
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《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1973,61(11):1570-1574
Software implementation for automatic test systems controlled by minicomputers can be a costly and time-consuming process. A procedure for implementing software which tends to minimize costs and avoid delays caused by unexpected problems is described. The procedure consists of completely defining the test system functions and performing a series of hardware versus software tradeoffs during the design and implementation process. The purpose of the tradeoffs is to determine the least costly method of implementing tester functions by either hardware, software, or some combination of hardware and software. Delays caused by unexpected problems are reduced by including hardware and software debugging aids which shorten the time to validate the tester system functions. An example of implementing an automatic test system in accordance with these procedures is provided. 相似文献
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This paper uses a single model to analyze the effects of both hardware and software on system reliability. A unified model of hardware and software reliability is developed using Markov modeling. Then the effect of hardware and software failures is studied using the model. The model incorporates concepts from both hardware and software reliability modeling. Examples of both simplex (nonredundant) and redundant architectures are analyzed using the model 相似文献