一种基于FPGA的ISA航空总线设计方法

Nios Ⅱ处理器是Altera公司推出的基于SOPC系统的嵌入式软核处理器。在Quartus Ⅱ软件的SOPC Builder工具中,用户可以利用Nios Ⅱ处理器、标准配套外围设备以及用户自定义的逻辑接口IP核来创建适用的Nios Ⅱ嵌入式系统,再将设计下载到Altera公司的FPGA中进行实现。本文在Quartus Ⅱ软件中使用Verilog硬件描述语言创建了基于Avalon总线的ISA总线接口逻辑,并在SOPC Builder中实现对此元件的封装,使之成为可供Nios Ⅱ系统使用IP核。     

Fault self-repair strategy based on evolvable hardware and reparation balance technology

In the face of harsh natural environment applications such as earth-orbiting and deep space satellites, underwater sea vehicles, strong electromagnetic interference and temperature stress,the circuits faults appear easily. Circuit faults will inevitably lead to serious losses of availability or impeded mission success without self-repair over the mission duration. Traditional fault-repair methods based on redundant fault-tolerant technique are straightforward to implement, yet their area, power and weight cost can be excessive. Moreover they utilize all plug-in or component level circuits to realize redundant backup, such that their applicability is limited. Hence, a novel selfrepair technology based on evolvable hardware（EHW） and reparation balance technology（RBT） is proposed. Its cost is low, and fault self-repair of various circuits and devices can be realized through dynamic configuration. Making full use of the fault signals, correcting circuit can be found through EHW technique to realize the balance and compensation of the fault output-signals. In this paper, the self-repair model was analyzed which based on EHW and RBT technique, the specific self-repair strategy was studied, the corresponding self-repair circuit fault system was designed, and the typical faults were simulated and analyzed which combined with the actual electronic devices. Simulation results demonstrated that the proposed fault self-repair strategy was feasible. Compared to traditional techniques, fault self-repair based on EHW consumes fewer hardware resources, and the scope of fault self-repair was expanded significantly.     

推进航空制造业信息标准化建设

我国制造业信息化是《国家中长期科学和技术发展纲要(2006-2020年)》确定的重点发展方向,是提升我国自主创新能力、实现产业结构转型升级和跨越式发展的重要技术支撑,是落实"以信息化带动工业化"战略的重大举措.     

基于CPLD的RS422接口电路设计

RS422总线目前已大量用于长距离线路通讯.阐述了一种利用CPLD作为主控单元所构成的RS422接口转换电路,该接口电路所有运算功能均采用硬件逻辑实现,具有响应速度快、可靠性高、通用性和灵活性强的特点.     

航天软、硬件产品质量管理标准的对比（续）

评审是在研制过程决策的关键时刻．全面系统地检查设计输出是否满足设计输入的要求．发现设计中存在的薄弱环节,提出改进措施和建议．加速设计成熟,降低决策风险。航天产品的技术评审一般包括阶段评审、关键点评审和专项评审．评审分类见表2．     

企业转型升级对标准化人才队伍建设的要求及解决对策

阐述企业转型升级对标准化人才队伍建设的要求,分析标准化人才队伍建设的管理现状以及存在的问题,并在此基础上,提出企业转型升级后,标准化人才队伍建设的解决方案与对策.     

返回舱搜救全程通信连续不间断

日前,着陆场系统总设计师吴斌接受采访时表示：“为确保神舟八号飞船顺利安全返回,着陆场系统通过技术创新和硬件升级,首次实现了返回舱搜救全程北京中心与着陆场之间调度、话音和图像通信的连续不间断。”     

宽带卫星硬件与服务供应商ViaSat诉卫星制造商SS/L专利侵权

2014年8月8日,宽带卫星硬件与服务供应商美国卫讯全球有限公司（以下简称“ViaSat”）诉劳拉空间与通讯公司,（Loral Space and Communications,以下简称“Loral”）及Loral的全资子公司劳拉空间系统公司（Space System/Loral,以下简称,“SS/L”）的专利权侵权赔偿案又有了新进展。     

软件化雷达接收系统技术探讨

讨论了实现软件雷达接收机的理论基础;提出了实现软件接收机的硬件电路时存在的问题及解决方案;给出了几种雷达信号的基本解调方法.