应变天平自补偿静校设备控制仪

本文所介绍的控制仪是实现对风洞应变天平自补偿静校设备进行自动加载和自动位置补偿的装置。文中扼要地介绍了设计思想、技术指标及其主要组成部件和电路原理图,还总结了控制仪在调试过程中排除电路干扰的若干措施。     

Past, present and future implications of human supervisory control in space missions

Achieving the United States’ Vision for future Space Exploration will necessitate far greater collaboration between humans and automated technology than previous space initiatives. However, the development of methodologies to optimize this collaboration currently lags behind development of the technologies themselves, thus potentially decreasing mission safety, efficiency and probability of success. This paper discusses the human supervisory control (HSC) implications for use in space, and outlines several areas of current automated space technology in which the function allocation between humans and machines/automation is sub-optimal or under dispute, including automated spacecraft landings, Mission Control, and wearable extra-vehicular activity computers. Based on these case studies, we show that a more robust HSC research program will be crucial to achieving the Vision for Space Exploration, especially given the limited resources under which it must be accomplished.     

煤气站有毒气体的计算机安全监控系统

本文为重大危险源的实时安全监测控制提供了一个先进通用的范例。系统首先通过传感器实时接收ＣＯ泄漏数据，当浓度超标后，系统将在工作现场及几个有关场所分别进行声、光报警和语音报警，并自动控制通风设备进行事故排风。此餐，可用工控机对所有的监测数据进行自动存储、统计、分析、查询、作图、打印等。该系统已在１３２厂得到了成功的应用，在国内居领先水平。其监控原理适用于其它有毒气体及燃烧爆炸场所的泄漏监控，具有广泛     

系统科学与民航安全文化建设

用现代系统理论观战,审视了中国民航安全文化建设的历史经验,得出了有益于安全文化建设的指导思想。首先,通过对安全文化与民航系统的协同问题的分析,探讨了对”安全第一“原则的深层次理解及在实际工作中的把握;其次,研究了系统的运动与安全文化发展的内在关系,提出了保证安全文化建设健康发展的思路。     

目标图像的显示及后期处理技术

:通过对由图象输入设备获得的目标图象文件的分析 ,论述了利用计算机来完成此类图象的显示方法。此外还论述了利用抛物插值算法来实现目标图像的后期处理———图象局部放大显示的原理及方法。     

美国载人航天安全要求和管理

安全问题对载人航天的成败至关重要.文章介绍了美国NASA在载人航天安全管理方面的有关标准和管理文件.文章也不排斥人的安全意识对载人航天的安全十分关键.     

本质安全论在民航安全管理中的应用

为明确民航安全管理思路。总结了本质安全的内涵，指出了民航业本质安全化的目的是不断降低系统的风险。在分析民航安全管理特征的基础上，分别从最小风险设计的源头管理、风险控制技术、纵深防御体系建设、防御体系之间的协同交互、安全文化建设等角度提出了民航系统本质更安全的建设策略。强调了安全保障要素间的替代关系，并探讨了优先选择顺序。其可行性已被安全管理中的初步应用所证实。     

基于层次分析法的直扩信号安全性能评估模型

在综合直扩信号风险分析、截获方法的基础上，率先对直扩信号安全性能评估模型进行了研究，建立了基于AHP（AnalyticHierarchyProcess，层次分析法）的直扩信号安全性能评估模型，详细给出了直扩信号安全指数的计算过程，并对多种直扩信号的安全指数进行了仿真。仿真结果袁明：评估方法有效；提出的模型可以定量评价不同直扩信号的安全性能，为直扩信号的安全性设计提供定量的依据。此外，还提出了卫星测控直扩信号的安全等级分类原则和卫星安全等级要求。     

基于大修平台的异地抢修安全生产探究

基于航空器大修平台，对如何安全、快捷并有效地组织异地抢修工作展开探讨，总结出一套适应当前民航业新形势的多元化管控异地抢修生产组织模式。     

Impact of the thermal effect on the load-carrying capacity of a slipper pair for an aviation axial-piston pump

A thermal hydraulic model based on the lumped parameter method is presented to analyze the load-carrying capacity of a slipper pair in an aviation axial-piston pump under specified operating conditions. Both theoretical and experimental results are presented to demonstrate the validity of the thermal hydraulic model. The results illustrate that the squeezing force and thermal wedge bearing force are the main factors that affect the film thickness and load-carrying capacity. At high oil temperature and high load pressure, the film thickness decreases with increasing clamping force due to a combined action of the squeezing bearing force and the thermal wedge bearing force, but the load-carrying capacity will increase. An increase of the film thickness is proven to be beneficial under high shaft rotational speed but especially dangerous as it strongly increases the ripple amplitude of the film thickness, which leads to decreasing the load-carrying capacity. The structural parameters of the slipper can be optimized to achieve desired performance, such as the slipper radius ratio and orifice length diameter ratio. To satisfy the requirement of the load-carrying capacity, the slipper radius ratio should be selected from 1.4 to 1.8, and the orifice length diameter ratio should be selected from 4 to 5.