质量评估中确定权重的方法

介绍了质量评估中确定权重的常用方法,主要包括专家咨询(Delphi)法、特征值法、加权最小二乘方法、对数回归法、残缺矩阵排序权重计算方法、群评价法、成对比较法等。     

小子样武器装备可靠性评定过程中专家信息的规范化描述

在对航空航天领域可靠性工程中专家信息的特征进行分析的基础上, 分别对模糊描述、概率描述法、专家打分法、主观语言描述方式的专家信息规范化进行了研究, 并对基于专家信息的验前分布确定过程进行了分析.建立了专家信息规范化的广义验前信息描述、基于不确定性加权验前信息描述、最大熵法验前信息描述的验前分布确定模型.论文的研究对于小子样条件下运用Bayes方法分析系统可靠性时, 基于专家信息的验前分布确定具有重要的工程指导意义.      

模糊综合评判法在维修作业任务优化中的应用

针对目前维修方面存在的效率低下的问题,提出了用模糊综合评判法对维修作业任务进行优化的方法,并以实例说明了该方法应用的合理性。     

飞机便携式维修辅助系统

现代飞机航电火控系统功能日益复杂，而测试性设计的不完善，使机内自检(BIT)虚警率、不可复现率及重测合格率成为各型飞机外场保障一大问题，便携式维修辅助系统(PMA)是解决该问题手段之一。该系统作为机内自检的补充，主要功能是增强机载航电设备故障隔离能力、排除正常LRU的不必要更换、综合BIT故障报告、机组和维修人员观察，记录虚警及不可复现故障历史和专家诊断系统从而提高外场保障效率水平。     

An intelligent control method for a large multi-parameter environmental simulation cabin

The structure and characteristics of a large multi-parameter environmental simulation cabin are introduced.Due to the diffculties of control methods and the easily damaged characteristics,control systems for the large multi-parameter environmental simulation cabin are diffcult to be controlled quickly and accurately with a classical PID algorithm.Considering the dynamic state characteristics of the environmental simulation test chamber,a lumped parameter model of the control system is established to accurately control the multiple parameters of the environmental chamber and a fuzzy control algorithm combined with expert-PID decision is introduced into the temperature,pressure,and rotation speed control systems.Both simulations and experimental results have shown that compared with classical PID control,this fuzzy-expert control method can decrease overshoot as well as enhance the capacity of anti-dynamic disturbance with robustness.It can also resolve the contradiction between rapidity and small overshoot,and is suitable for application in a large multi-parameter environmental simulation cabin control system.     

Multi-parameter decoupling and slope tracking control strategy of a large-scale high altitude environment simulation test cabin

A large-scale high altitude environment simulation test cabin was developed to accurately control temperatures and pressures encountered at high altitudes. The system was developed to provide slope-tracking dynamic control of the temperature–pressure two-parameter and overcome the control difficulties inherent to a large inertia lag link with a complex control system which is composed of turbine refrigeration device, vacuum device and liquid nitrogen cooling device. The system includes multi-parameter decoupling of the cabin itself to avoid equipment damage of air refrigeration turbine caused by improper operation. Based on analysis of the dynamic characteristics and modeling for variations in temperature, pressure and rotation speed, an intelligent controller was implemented that includes decoupling and fuzzy arithmetic combined with an expert PID controller to control test parameters by decoupling and slope tracking control strategy. The control system employed centralized management in an open industrial ethernet architecture with an industrial computer at the core. The simulation and field debugging and running results show that this method can solve the problems of a poor anti-interference performance typical for a conventional PID and overshooting that can readily damage equipment. The steady-state characteristics meet the system requirements.     

专家解读世界最大规模射电望远镜阵列

目前,由中国、澳大利亚、意大利、新西兰、荷兰、南非、英国等全球20个国家的科学家们筹划建造的,全世界最大规模的射电望远镜阵列（SKA）已经进入倒计时。 据悉,SKA由3300个15米口径抛物面天线和250个直径约60米AA（Aperture Array）低频孔径阵组成,分布在3000千米范围形成旋臂阵列望远镜。     

主编的话

伴随着新年的钟声,《空间科学学报》已悄然走过39载。在广大作者、读者的关心与支持下,在全体编委、审稿专家的共同努力下,学报的学术水平、编校质量正在稳步提升。2019年,中国空间科学发展平稳推进。嫦娥四号探测器实现了人类探测器首次在月球背面软着陆,微重力技术实验卫星发射升空,空间环境地基综合监测网项目正式启动,增强型X射线时变与偏振空间天文台、广目地球科学卫星、先进天基太阳天文台卫星及引力波暴高能电磁对应体全天监测器卫星等研制进展顺利。     

敬告读者

《空气动力学学报》互联网期刊平台已于2012年正式开通使用。该平台集作者投稿、专家审稿、审稿进度查询和刊物网上订阅等功能于一体。网址:http://kqdlxxb.cars.org.cn,欢迎各位专家、作者和读者访问。今后,本刊将不再接受纸质稿件和Email投稿。     

2012年度“航空学报优秀审稿专家”

《航空学报》与CJA近年来屡获佳绩,这与审稿专家的努力是分不开的。为了感谢优秀审稿专家所做的工作,编辑部从2009年开始,每年根据审稿专家在过去一年中的审稿数量、质量进行综合评估,排名居前20位的专家将被评为"航空学报优秀审稿专家"。获奖专家将获得编委会颁发的证书,同时在向本刊投稿时还可享受一定的优惠。