The key technology of open architecture CNC systems kernel device driver,including the interrupt mechanism, I/O subsystem, the structure of device driver and the communication between the driver and the application p...The key technology of open architecture CNC systems kernel device driver,including the interrupt mechanism, I/O subsystem, the structure of device driver and the communication between the driver and the application program, is discussed in the paper and a specific application is given at the end.展开更多
Investigations are reported into the use of an electromagnetically convoluted arc,external to a magnetic field(B-field)producing coil,in combination with a parallel R,L,C resonant circuit for interrupting quasi-steady...Investigations are reported into the use of an electromagnetically convoluted arc,external to a magnetic field(B-field)producing coil,in combination with a parallel R,L,C resonant circuit for interrupting quasi-steady currents.In order to elucidate the complex interactions between the arc,B-field and R,L,C circuit,the B-field producing coil is energised independently from the current to be interrupted and the R,L,C circuit.Experimental results are presented for the time variation of the currents flowing through the arc gap,the B-field coil and the parallel R,L,C circuit,along with the voltage across the arc gap.An insight is gained into the role of various effects,which are produced by the complex interactions and which might be used to advantage for direct current interruption.展开更多
星载抗辐射多频多模导航器件单粒子效应(SEE)数据获取为器件能否在轨可靠使用提供重要参考。在介绍公司自研导航器件组成结构和抗辐照加固设计的基础上,通过设计专用试验板,在FPGA上进行DFT-SCAN、MBIST向量测试。利用重离子加速器完成...星载抗辐射多频多模导航器件单粒子效应(SEE)数据获取为器件能否在轨可靠使用提供重要参考。在介绍公司自研导航器件组成结构和抗辐照加固设计的基础上,通过设计专用试验板,在FPGA上进行DFT-SCAN、MBIST向量测试。利用重离子加速器完成空间单粒子辐照的地面模拟实验,以此确定导航器件的单粒子数据。通过实验数据计算得到导航器件SEE指标数据:抗单粒子锁定LET≥81.4 MeV·cm^(2)/mg,在GEO轨道、ADAMS 90%最坏环境模型、3 mm Al屏蔽条件下,器件SCAN链模式单粒子翻转概率为6.80×10^(-8)次/(天·位),SRAM模式单粒子翻转概率为5.61×10^(-11)次/(天·位),单粒子功能中断概率为5.75×10^(-5)次/(天·器件),为在轨航天器导航接收机使用提供依据和参考。展开更多
Windows NT操作系统不允许直接访问硬件 ,给图像的实时采集、存储、显示等处理工作带来了很大困难。对在核心态下采用编制虚拟设备驱动程序的方法进行探讨 ,重点讨论了如何在 Windows NT下实现数据采集卡的中断和 DMA过程并给出了相应...Windows NT操作系统不允许直接访问硬件 ,给图像的实时采集、存储、显示等处理工作带来了很大困难。对在核心态下采用编制虚拟设备驱动程序的方法进行探讨 ,重点讨论了如何在 Windows NT下实现数据采集卡的中断和 DMA过程并给出了相应例程。展开更多
文摘The key technology of open architecture CNC systems kernel device driver,including the interrupt mechanism, I/O subsystem, the structure of device driver and the communication between the driver and the application program, is discussed in the paper and a specific application is given at the end.
文摘Investigations are reported into the use of an electromagnetically convoluted arc,external to a magnetic field(B-field)producing coil,in combination with a parallel R,L,C resonant circuit for interrupting quasi-steady currents.In order to elucidate the complex interactions between the arc,B-field and R,L,C circuit,the B-field producing coil is energised independently from the current to be interrupted and the R,L,C circuit.Experimental results are presented for the time variation of the currents flowing through the arc gap,the B-field coil and the parallel R,L,C circuit,along with the voltage across the arc gap.An insight is gained into the role of various effects,which are produced by the complex interactions and which might be used to advantage for direct current interruption.
文摘星载抗辐射多频多模导航器件单粒子效应(SEE)数据获取为器件能否在轨可靠使用提供重要参考。在介绍公司自研导航器件组成结构和抗辐照加固设计的基础上,通过设计专用试验板,在FPGA上进行DFT-SCAN、MBIST向量测试。利用重离子加速器完成空间单粒子辐照的地面模拟实验,以此确定导航器件的单粒子数据。通过实验数据计算得到导航器件SEE指标数据:抗单粒子锁定LET≥81.4 MeV·cm^(2)/mg,在GEO轨道、ADAMS 90%最坏环境模型、3 mm Al屏蔽条件下,器件SCAN链模式单粒子翻转概率为6.80×10^(-8)次/(天·位),SRAM模式单粒子翻转概率为5.61×10^(-11)次/(天·位),单粒子功能中断概率为5.75×10^(-5)次/(天·器件),为在轨航天器导航接收机使用提供依据和参考。
