对旋风机对旋叶轮级间流场的实验研究

采用实验方法对对旋风机对旋叶轮级间流场进行了研究。在改变级间间隙和前后级转速的情况下,采用五孔探针对级间压力场和速度场进行了了测量,并对结果进行了分析。研究表明:前后级动叶加功量的分配在对旋风机的气动设计中占有很重要的地位,这种分配可以通过转速的匹配来实现;在气动设计中,应增加对旋叶轮级间间隙的控制设计。      

用于电场探头校准的一种新设备——吉赫横电磁波传输室(GTEM小室)

介绍了近年来在电磁兼容性测量及场强测量领域已经广泛应用的吉赫横电磁波传输室（GTEM小室）。提出了将其用于校准电场探头的条件和方法。     

Space Tweetup – from a participant to a Mars Tweetup organizer and a new format of space communication

In September 2011, the European Space Agency (ESA) and the German Space Agency (DLR) organized the first European SpaceTweetup during the German Aerospace day. One of the authors was one of 60 participants at this SpaceTweetup in Cologne and experienced the concept of a Tweetup and the engagement of the participants from the inside view.     

Low-cost solutions for Martian base

Technical and architectural problems of a Martian base have been arised in many publications. Usually there is one solution described in detail or general classification is presented. In this paper, a recognition of low-cost solutions for Martian architecture is analyzed. The overview through various building techniques based on previous concepts of extraterrestrial architecture is summarized. Several solutions taking advantages of the shape of terrain, aiming for cost decreasing of human settlement on Mars are proposed.     

Bacterial survival in response to desiccation and high humidity at above zero and subzero temperatures

Earthly microorganisms might have contaminated Mars for millions of years by intellectual activities or natural transfer. Knowledge on the preservation of microorganisms may help our searching for life on outer planets, particularly Mars-contaminated earthly microorganisms at ancient time. Extreme dryness is one of the current Mars characteristics. However, a humid or watery Mars at earlier time was suggested by evidence accumulated in recent decades. It raises the question that whether water helps preservation of the microorganisms or not, particularly those with high possibility of interplanetary transfer like spores and Deinococci. In this study, we examined the effects of desiccation and high humidity on survival and DNA double strand breaks (DSB) of Escherichia coli, Deinococcus radiodurans and spores of Bacillus pumilus at 25, 4 and −70 °C. They exhibited different survival rates and DSB patterns under desiccation and high humidity. Higher survival and less DSB occurred at lower temperature. We suggest that some Mars-contaminated bacteria might have been viably preserved on cold Mars regions for long periods, regardless of water availability. It is more likely to find ancient spores than ancient Deinococci on Mars. In our search for preserved extraterrestrial life, priority should be given to the Mars Polar Regions.     

火星地形测绘研究综述

火星地形测绘是开展火星科学研究的基础。介绍了与地形测绘相关的火星探测任务,并对地形测绘传感器进行了分析。阐述了火星地形测绘摄影测量数据处理的基本原理,研究了基于SPICE库建立火星表面线阵影像严密几何模型的方法。讨论了火星地形测绘摄影测量数据处理中的光束法平差、密集匹配以及多线阵拼接等关键技术。在总结现有火星地形测绘任务特点的基础上,针对我国开展火星地形测绘研究提出了建议。     

基于B平面的火星探测直接转移轨道设计方法

将轨道设计转化为常微分方程两点边值(TPBVP)问题,采用微分修正法求解该边值问题.将B平面概念同时应用于地球和火星,借助B平面与双曲线轨道的几何关系解析地给出了两点边值问题的边界条件的建立方法,理论上说明了火星探测直接转移轨道存在4组解的原因,同时提出了控制探测器到达相对火星双曲线轨道近火点时刻的准确参数表示方法.最终给出仿真算例,将轨道设计结果代入STK,结果合理.     

防静电屏蔽包装袋测试方法研究

列举了目前市场上针对防静电屏蔽包装袋的表面电阻测试方法和静电感应峰值电压测试方法,并根据其各自的测试原理说明了其缺陷,对美标提出的静电放电感应能量法进行了详细的分析,其特点是使用接近实际环境的HBM模型,用不影响测量回路的电流探针取代电压探针,用200MHz带宽500MS/s采样率示波器覆盖更宽的频率范围减小误差,从能量的角度表述了静电屏蔽性能的优劣。     

萤火一号深空测控设备

深空测控通信是实施深空探测的关键技术, 萤火一号探测器是中国第一个深空探测器. 本文介绍了深空测控通信的特点、存在的技术困难及需要攻克的关键技术, 描述了萤火一号火星探测器的测控通信技术方案及星载测控设备的功能分配, 给出了星载测控设备的基本配置情况及主要技术指标. 萤火一号探测器的测控和数传采用一体化设计方案, 在10 kg重量约束条件下, 实现了上行遥控通道及下行遥测通道, 具备科学数据传输通道及测定轨信号发送的功能, 而且每个通道均具有冗余备份设备.      

中国首次火星探测工程有效载荷总体设计

简要介绍了中国首次火星探测工程的科学目标与有效载荷的配置,有效载荷分系统的总体技术方案,包括有效载荷供配电、遥测遥控、科学数据处理、在轨自主运控,以及有效载荷分系统在轨基本工作流程安排。针对火星环绕器有效载荷功能复杂、安装位置分散等特点,配置了独立的载荷控制器设备,通过总线网络将有效载荷分系统组成有机整体,实现与环绕器平台的统一电接口。针对火星车有效载荷在重量、体积、能源等方面的严格限制,通过最大限度地将各有效载荷主控电子学控制单元集成于一台载荷控制器设备中,实现了对有效载荷的集中控制和管理。