肼类动态标准气体发生装置的设计

研制了用于制取肼类标准气体的动态配气装置。该装置通过精密控制的蠕动泵连续不断地注射一定量的肼类液体 ,同时以加热的高纯氮气作为载气 ,在动态中混合均匀后得到一定体积分数的肼类标准气体。结果显示 ,在载气温度、载气流量以及环境温度一定的条件下 ,通过控制进给流量可制备体积分数为 (0 .1～ 10 0 )× 10 -6的肼类标准气体     

齿轮槽头型新型标准件安装工艺与试验研究

航空制造领域大量采用了如螺栓连接的标准件连接,随着新型飞机性能的提高,长寿命、高疲劳强度和高振动环境等指标对标准件的使用提出了更高的要求.本文通过开展齿轮槽头型新型标准件安装工艺与试验研究,一方面确定了该型标准件安装力矩等关键工艺参数及对复合材料的适用性,为其装机和使用提供理论依据及数据支持;另一方面,也对开展新型标准件安装工艺与试验的研究方法进行了有益的探索,对逐步形成一套完善的试验方法规范具有很好的指导作用.     

约瑟夫森电压标准的低温系统

主要介绍了采用G-M制冷机作为冷源,可以随时启停的用于约瑟夫森电压标准的低温系统,介绍了系统组成工作原理及技术难点的解决方法并给出了测量结果。结果表明该低温连系统的研制成功并启用,有效的降低了约瑟夫森阵列电压标准的运行费用,提高了经济效益。由于采用了自动化控制技术,实现了运行系统的全自动化运行模式,简化了操作步骤,提高了工作效率。     

8902A测量接收机检定高频电压表的实验研究

对８９０２Ａ测量接收机用作高频中,小电压标准进行了分析研究,介绍了一种检定超高频毫伏表的新方法,并给出了实验数据,对该标准装置的不确定度进行了分析。     

谐振式加速度计自激振荡电路性能评价方法的研究

针对谐振式加速度计成品率不高、精度低等问题，以石英振梁加速度计为例，采用引进标准信号，将谐振电路作为“黑盒子”，对其开展独立的评价。通过评价电路的驱动电压幅值稳定性、移相稳定性、全温幅值/相位对称性等指标，与加速度计实际指标建立了一一对应的关系，为加速度计研制与性能提升提供了有效依据。实际运用表明，电路噪声性能、温度性能大幅提升，产品成品率从70%提高到了约90%。     

质心标准研究CSCD

工程实践中通常采用标准件作为质心标准。理论研究发现,质心标准件存在较大的不确定性,采用质心标准件校准的质心测量设备量值准确度存疑。在实践中,通过研究创建了全新的质心标准,利用该质心标准对质心测量设备进行了校准,并对两种方法校准的结果进行了比较。应用实践表明,新的质心标准比质心标准件准确度高。     

测控技术标准体系浅析

在新版《军用标准体系表》中,测控技术标准作为24项共用技术之一被单独列项,为测控技术标准体系建设提供了良好机遇。在扼要介绍新版《测控技术标准体系》的基础上,对新版《测控技术标准体系》的构建思路、技术特点进行了简要分析。     

Estimates of vertical land motion along the southwestern coasts of Turkey from coastal altimetry and tide gauge data

The differences between coastal altimetry and sea level time series of tide gauges in between March 1993 and December 2009 are used to estimate the rates of vertical land motion at three tide gauge locations along the southwestern coasts of Turkey. The CTOH/LEGOS along-track coastal altimetry retrieves altimetric sea level anomalies closer to the coast than the standard along-track altimetry products. However, the use of altimetry very close to the coast is not found to improve the results. On the contrary, the gridded and interpolated AVISO merged product exhibits the best agreement with tide gauge data as it provides the smoothest variability both in space and time compared with along track altimetry data. The Antalya gauge to the south (in the Mediterranean Sea) and the Mentes/Izmir gauge to the west (in the Aegean Sea) both show subsidence while the Bodrum tide gauge to the south (in the Aegean Sea) shows no significant vertical land motion. The results are compared and assessed with three independent geophysical vertical land motion estimates like from GPS. The GIA effect in the region is negligible. The VLM estimates from altimetry and tide gauge data are in good agreement both with GPS derived vertical velocity estimates and those inferred from geological and archaeological investigations.     

A series of small scientific satellite with flexible standard bus

Japan Aerospace Exploration Agency has a plan to develop the small satellite standard bus for various scientific missions and disaster monitoring missions. The satellite bus is a class of 250–400 kg mass with three-axis control capability of 0.02 accuracy. The science missions include X-ray astronomy missions, planetary telescope missions, and magnetosphere atmosphere missions. In order to adapt the wide range of mission requirements, the satellite bus has to be provided with flexibility. The concepts of modularization, reusability, and product line are applied to the standard bus system. This paper describes the characteristics of the small satellite standard bus which will be firstly launched in 2011.     

抽屉式标准机柜地面通风换热性能的研究

通过抽屉式标准机柜通风换热性能的地面实验研究和数值模拟,分析了在侧进上出和下进上出两种方式下,进风流量、风道通风孔宽度及自然对流对机柜地面通风换热性能的影响。结果表明,在一定范围内增加机柜进气流量和减小通风孔尺寸可改善机柜通风换热性能。此外,对于本文所研究两种进出风口布置方式,在相同的参数状态下,机柜在微重力状态下的通风换热性能优于地面状态或者相当,因此,满足标准机柜地面状态换热要求的设计参数也会满足微重力状态的换热要求。