Crew autonomy for deep space exploration: Lessons from the Antarctic Search for Meteorites

Future piloted missions to explore asteroids, Mars, and other targets beyond the Moon will experience strict limitations on communication between vehicles in space and control centers on Earth. These limitations will require crews to operate with greater autonomy than any past space mission has demonstrated. The Antarctic Search for Meteorites (ANSMET) project, which regularly sends small teams of researchers to remote parts of the southern continent, resembles a space mission in many ways but does not rely upon a control center. It provides a useful crew autonomy model for planners of future deep space exploration missions. In contrast to current space missions, ANSMET gives the crew the authority to adjust competing work priorities, task assignments, and daily schedules; allows the crew to be the primary monitor of mission progress; demands greater crew accountability for operational errors; requires the crew to make the most of limited communication bandwidth; adopts systems designed for simple operation and failure recovery; and grants the crew a leading role in the selection and stowage of their equipment.     

Space science education in Egypt and the 2006 solar eclipse

The space science research has been started in Egypt since 1910 by measuring the solar constant as indication of solar radiation at Helwan Observatory. The solar sunspot studies and its influence on the Nile flooding was erected and operated at Helwan as a first solar station in Egypt during 1957. Zeiss-Coude’ refractor was installed in 1964. Astronomy and space science educations started in Egypt at the university level since 1936 at Department of Astronomy and Meteorology of Cairo University. Undergraduate and graduate education in Egypt will be discussed in this work.     

大后掠机翼翼尖导弹动力响应空测与数据分析

 <正> 大后掠机翼翼尖挂导弹对外界干扰的动力响应很灵敏,这种干扰主要来自随机不稳定气流或各种突加载荷。为保证安全和防止导弹失控,摸清其响应值非常必要;除理论计算外,对可能遇到的不平稳气流和突加载荷在翼尖导弹上的动力响应进行了空测,并用频谱分析和功率谱密度分析处理了空测数据,制订了翼尖导弹振动与冲击试验谱,进行了地面试验与空中打靶试验,获得了满意结果。     

涡扇发动机放气起动分析与试验研究

为进行涡扇发动机放气起动特性的研究,建立了发动机放气起动模型,并进行了仿真计算;为进一步验证放气对发动机起动的影响,进行了发动机放气起动试验,获得了发动机放气起动的特点,定性验证了仿真计算结果;通过多次调整起动供油规律的试验,得到了发动机起动供油边界。计算和试验结果表明:在发动机起动过程中放气可提高发动机的起动稳定性,同时发动机排气温度也有所提高,发动机放气起动供油边界高于不放气起动供油边界,放气起动提高了发动机起动稳定裕度。     

高原机场终端区飞行闭环稳定性分析

分析了高原机场终端区飞行的特殊性和影响高原机场飞行闭环稳定性的各种不利因素,指出了在高原机场缺氧条件下对飞行员数学模型修正的必要性和修正方法.采用等效闭环系统方法分析飞机在高原机场环境下的闭环稳定性,利用该思路可以用常规的分析方法研究高原机场飞行员缺氧条件下的闭环稳定性.     

Cutting the bread

Why the draft Treaty on the Prevention of the Placement of Weapons in Outer Space, the Threat or Use of Force Against Outer Space Objects (PPWT) will not work - whereas the Code of Conduct for Outer Space Activities may.     

波形合成的方向处理

波形合成中方向问题的核心是相位计算。本文作了分析     

探讨培养高职学生语文职业能力的途径

从弱化传统语文重视知识传授的做法、注重语文教学与专业学习的结合及加强语文能力的实践训练等方面,探讨培养高职学生语文职业能力的途径。     

关于“用好的作风选人，选作风好的人”的逻辑梳理

“用好的作风选人，选作风好的人”必须确定相关的概念，必须进行科学的判断，必须进行正确的推理。本文试图从逻辑角度对这一选人用人原则进行梳理。     

民用飞机空气起动系统性能评估方法

根据民用飞机起动系统设计特点,分别给出了起动轴功率检查和起动机进口参数检查2种起动性能评估方法,并对2种方法进行了对比,起动轴功率检查方法可以直接反映起动机轴功率的设计状态;而起动机进口参数检查方法可以直接反映出起动关键参数(流量、总温和总压)的设计状态。最后,以某型辅助动力装置供气的起动性能计算为例验证了基于起动机进口参数的计算方法。