空间飞行器电源系统的现状及展望

本文反映了国际上飞行器电源系统的历史和现状;介绍了太阳电池阵、蓄电池联合电源系统,放射性同位素电源和核反应堆的空间应用可能性,以及潜在的危险因素;并对未来进行了展望。     

供应链库存管理的问题与策略

探讨了供应链模式下库存管理存在的问题 ,介绍了联合库存管理的基本思想 ,提出了供应链模式下有效库存管理的策略。     

基于GPIB的电源自动测试系统的设计

介绍了基于GPIB总线技术的电源参数自动测试系统，详细阐述了系统的硬件组成和软件编程。该系统不仅具有高的测量效率和测量精度等优点，而且结构灵活、可扩展性好，满足各种电源的测试要求，经使用验证，可应用于实际生产中。     

航空变速恒频电源系统中优化的SPWM调压研究

 在航空变速恒频系统（VSCF）中，航空发电机发出的变频交流电经整流变换为直流电，再经逆变器变换成恒频交流电。逆变器通常采用固定开关点的优化的ＳＰＷＭ技术，通过调节发电机激磁调节输出电压。由于系统是高阶系统，为了降阶，提出改变开关点的位置来调节输出电压，并提出优化ＳＰＷＭ的定义，分析了调节范围和谐波含量的变化，并给出了实现电路。     

20世纪上海航天器电源技术的进展

较为系统地介绍了作为航天器电源的锌银电池组和硅太阳电池阵／镉镍蓄电池组联合供电系统的组成、主要性能参数及其技术特点。阐述了近半个世纪以来，上海航天技术研究院在航天器电源研制技术方面所取得的成就及其在国内卫星、飞船和国外卫星领域的应用情况。指出了航天器电源技术今后的发展方向。     

YTQ-7氧气调节器性能参数调整分析与实验验证

情况下，实验数据通过对YTQ-7氧气调节器供氧浓度调节原理的分析，说明调整氧浓度调节机构后．在高空输入富氧可以达到输入纯氧时的供氧浓度要求。经测试并对比分析YTQ-7氧气调节器调整前后供氧性能参数验证调整后的氧气调节器供氧性能能够满足不同高度下供氧浓度生理学要求。     

中国社会物流成本分析

理论上，现代物流研究在很大程度上是围绕物流成本问题展开的，具体就是在实现一定物流服务水平基础上的物流成本最小化问题，或是在控制物流成本基础上的物流服务最大化问题。现实中，中国物流业已进入了快速发展时期，物流业务收入增长迅速，但社会物流成本却一直居高不下。文章围绕中国社会物流总费用展开分析，具体研究中国社会物流成本的现状及成因，并提出相应的对策。     

关于太阳模拟器电源的理论和实践

文章回顾了太阳模拟器电源发展的三个阶段:碳弧灯和磁饱和电抗器阶段;氙灯和模拟量阶段;氙灯和数字量阶段.文章并阐述了KM6太阳模拟器电源的设计思路,详细地介绍了可选用元器件的优缺点,以及"PWM"变换器的选择.     

多端单片开关电源在功率因数校正电路中的应用

讨论了采用恒频非恒占空比控制的功率因数校正电路的工作原理,介绍了NCP1650型多端单片开关电源的特点及内部电路,重点阐述了NCP1650在功率因数校正电路(PFC)中的应用,并给出了设计方法和设计电路。     

Vegetable production facility as a part of a closed life support system in a Russian Martian space flight scenario

A Manned Mars Mission scenario had been developed in frame of the Project 1172 supported International Science & Technology Center in Moscow. The Mars transit vehicle (MTV) supposed to have a crew of 4–6 with Pilot Laboratory compartment volume of 185 m³ and with inner diameter of 4.1 m. A vegetable production facility with power consumption up to 10 kW is being considered as a component of the life support system to supply crew members by fresh vegetables during the mission. Proposed design of conveyor-type plant growth facility (PGF) comprised of 4-modules. Each module has a cylindrical planting surface and spiral cylindrical LED assembly to provide a high specific productivity relative to utilized onboard resources. Each module has a growth chamber that will be from 0.7 m to 1.5 m in length, and a crop illuminated area from 1.7 m² to 4.0 m². Leafy crops (cabbage, lettuce, spinach, chard, etc.) have been selected for module 1, primarily because of the highest specific productivity per consumed resources. Dietitians have recommended also carrot crop for module 2, pepper for module 3 and tomato for module 4. The maximal total PGF light energy estimated as 1.16 kW and total power consumption as about 7 kW. The module 1 characteristics have been calculated using own experimental data, information from the best on ground plant growth experiments with artificial light were used to predict crop productivity and biomass composition in the another modules. 4-module PGF could produce nearly 0.32 kg per crew member per day of fresh edible biomass, which would be about 50% of recommended daily vegetable supplement. An average crop harvest index is estimated as 0.75. The MTV food system could be entirely closed in terms of vitamins C and A with help of the PGF. In addition the system could provide 10–25% of essential minerals and vitamins of group B, and about 20% of food fibers. The present state of plant growth technology allows formulating of requirements specification for the flight-qualified modules.