飞行试验工程大数据治理思考

飞行试验工程大数据是典型的工业大数据,是试飞工程规划、设计、执行、评估以及开展航空科学研究的最重要的基础。文章分析了试飞工程大数据的质量特性及其影响因素,学习借鉴国际标准化《数据治理白皮书》提出的数据治理思想体系与模型,针对试飞工程大数据管理与应用特点,结合多年来在试飞工程中的大数据管理应用的实践经验,提出了以飞行试验大数据标准化体系为基础,以涵盖试飞工程全过程和全业务流程的试飞数据质量监控系统和一体化的试飞大数据管理与应用系统为并行相互支持的大数据治理技术平台,将试飞业务流程、业务策略、业务标准、业务逻辑以及组织管理有机有效地融入到数据管理与治理体系中,形成能够不断自我完善、自我更新、自我规范、开放共享的试飞工程大数据治理体系,对飞行试验工程以及航空科学研究步入“大数据科研范式”奠定数据基础。     

飞行试验综合安全监控技术

在新型飞机飞行试验任务中,遥测监控技术是保证试飞安全,提高试飞效率的重要手段。针对目前地面实时监控技术面临的问题和挑战,提出采用基于故障树的多类型告警技术、试飞任务的嵌入式准实时数据处理技术及应急处置辅助决策技术等先进监控技术,引入试飞安全决策库理念,建立应急处置辅助决策机制,构建飞行试验综合安全监控系统,实现飞机各系统试飞状态监控和综合故障告警、复杂试飞科目的准实时计算评估和应急处置决策支持。实际飞行试验结果表明,应用此技术开发的综合安全监控系统,可以使试飞指挥员和工程师在第一时间及时准确地获取试验机故障告警、试飞科目评估结果和应急处置决策方案,极大地提高了试飞效率和安全性。     

云技术在飞行试验数据处理中的应用

针对飞行试验数据的海量非结构化的特点以及当前所面临的处理与应用问题,研究分析当前新兴的云技术,提出了飞行试验数据云计算应用架构的3个组成要素:设备系统、云存储和云计算。面向试飞数据工程应用,以试飞科目、试验动作段为频度矩阵建立试飞元数据存储阵列,实现海量非结构化试飞数据的云存储应用;以SOA架构为基础,结合面向应用的处理功能组件,实现分布式网络计算调度和计算群集,为用户提供高效的云计算服务。工程实践应用表明,该系统以灵活架构有效地解决了非结构化大数据信息的高效存储、统一管理和共享应用,实现了海量试飞数据的快速分析处理,展示了云计算技术的先进特点。     

航空飞行试验工程大数据管理与应用思考

飞行试验是航空装备研制的重要环节之一,形成和产生的工程数据具有明显的大数据特征。传统的以试验测试数据为主的数据管理思想,难以保证试飞工程数据及其关系的完整性和准确性,无法全面表征飞行试验全过程,不利于试飞数据的再利用。在分析航空飞行试验复杂系统工程的有机组成及其工程大数据的本质特征和逻辑结构的基础上,结合近年来在飞行试验数据管理和处理研究中取得的技术成果和实践经验,提出了基于试飞工程全生命周期的航空飞行试验工程大数据管理思想,以试验对象为中心的一体化大数据采集和系统化大数据结构模型,和面向业务的基于SOA的分布式系统框架,便于建立一个综合、全面、开放的试飞工程大数据管理和挖掘应用平台,促进航空产品试飞数据处理效率的提升和试飞工程大数据在航空科研中的挖掘和广泛应用,发挥试飞工程大数据的发展助推作用。     

机组告警信息地面实时监控系统设计

机组告警信息对于保障民机飞行安全有着至关重要的作用,为了保障民机试飞地面安全实时监控任务,需要开发一套系统能够在试飞过程中精确地给出机组告警信息.机组告警信息内容来源于机上多个子系统,重点研究了如何从遥测接收的PCM流中精确解析出告警信息以及地面实时系统各个模块间的通信及功能设计.采用了典型的C/S (Client/Server)结构来搭建系统,通过对告警信息进行分类判决和设计虚警抑制机制实现了机组告警信息的正确解析.经多个飞行起落验证,该系统运行稳健,告警信息与机上显示内容相符,可满足地面指挥和试飞工程师的监控需求.该系统为民机试飞任务的顺利进行提供了保障,值得后续民机型号借鉴.     

典型大数据仓库-飞行试验数据仓库设计

在现代数据仓库技术思想的指导下,围绕试飞数据的非结构化大数据的特点,面向型号工程对试飞数据的统一管理和高效处理需求,分别针对试飞大数据的粒度描述和综合管理,设计了飞行试验元数据标准和特有的基于二进制文件的数据库管理服务,解决了飞行试验数据仓库设计中结构化与非结构化大数据的统一维度建模和数据关系维护的关键技术问题,为基于数据仓库的试飞大数据在线管理与分析系统的建立提供了基础,满足了型号工程对试飞数据的高效分析需求.     

飞行体实时飞行显示系统的实现

1前言 飞行体实时飞行显示系统,是根据所获得的飞行体的运动参数(包括空间位置、速度及姿态参数),以图形方式实时地显示飞行运动过程的系统.该系统不受天气、气候及超视距的影响,提供给科研及指挥人员生动直观的信息,帮助其及时了解和掌握发生的现场情况,并进行实时监控和决策.它对卫星控制、飞机试飞及导弹试验等领域具有广阔的应用前景和应用推广价值.该系统按照预先建立的三维场景和飞行体模型及天空背景,利用飞行体运动参数控制飞行体在场景中的行为,最终生成用户所观察到的场景图像.如配合音响系统则可大大增强视听觉的冲击力.     

平战结合 平灾兼容——东方正通打造石景山区应急指挥系统

石景山区应急指挥系统是一个全面、完整的区县级政府应急指挥信息系统,结合北京市应急指挥系统信息化技术支撑体系,实现了有线通信调度系统、无线指挥通信系统、图像监控系统、计算机网络应用系统、综合保障系统。     

基于TDMA多目标遥测数据传输系统设计与实现

遥测监控是新机试飞提高试飞效率、保障试飞安全的重要手段,遥测数据的传输能力和传输质量决定了遥测实时监控性能的优劣;随着大量飞机同场次试飞任务的广泛开展,现有飞行试验单站点对应单目标的遥测体制存在一定的局限性,为了解决多个目标同时遥测数据传输的难题,文章在对常用的几种多目标体制进行了比较的基础上,设计了一套基于TDMA体制的多目标遥测数据传输系统,对该系统数据的传输速率、距离进行了理论计算,并进行了飞行试验验证,能够满足任务需求,有着很好的应用前景。     

飞行试验大数据技术发展及展望

现代航空武器装备综合化和信息化程度越来越高,飞行试验测试数据的种类增多,测试数据量剧增,飞行试验进入了大数据时代;试飞大数据的来临,对试验数据的获取、记录、传输和处理等传统技术及模式产生了强大的冲击,也提出了严峻的挑战;文章在简要介绍大数据概念及国外研究应用现状的基础上,通过总结分析飞行试验数据的新特征、新需求,提出了“试飞大数据”的概念,得出飞行试验数据是典型大数据的结论;按照试飞测试流程和大数据技术范畴,重点分析了试飞大数据技术中的数据获取、交换、记录、传输、监控、处理、存储等关键技术,最后,对试飞大数据技术的应用前景进行了展望.     

Assessing Ideational and Evaluative Skills and Creative Styles and Attitudes

This article describes the rationale for the multiphase creative problem solving process, and reports the findings from an empirical investigation conducted to facilitate the problem solving of managers. The ideational skills of the managers were assessed before and after training in a complete process of creative problem solving, along with their ideational attitudes, creative problem solving style (i.e., generator, conceptualizer, optimizer, or implementor), and evaluative skill (i.e., ability to recognize original ideas). The most important findings indicated that the training had a significant impact on the evaluative accuracy of the managers. They were significantly more accurate in their judgments about original ideas after training, both in their identification of original ideas and their recognition of unoriginal ideas. After training, the managers also gave more solutions and more original solutions to problems. Finally, several variables (e.g., the “preference for active divergence” attitude, and the conceptualizer process style) seemed to moderate the impact of training. Training was therefore effective, with specific effects that can be predicted from pre-training individual differences in attitudes and process style.     

高等院校行政分析与决策系统的设计与实现

为提高高等院校的管理水平和决策水平,充分利用校园网资 源,开发了高等院校行政财政分析与决策系统。解决了诸如数据的动态查询、自动生成报表 、网络环境下数据共享等技术问题,具有网上数据共享、图形界面友好和安全的保密措施等 特点。     

Semantics and verification of monitors and systems of monitors and processes

In this paper we present a sound and complete semantics for the monitor concept of C.A.R. Hoare. First a method for specification of monitors, introduced by O.-J. Dahl, is reviewed. This method is based on the relation between the historic sequence of monitor procedure calls and the historic sequence of monitor procedure exits. Based on such specifications and our new monitor semantics we present a method by which it is possible to prove that a concrete monitor is an implementation of an abstract one. In the last part of the paper an axiomatic semantics for systems of concurrent processes and monitors is introduced. The method supports verification by separation of concerns: Properties of the communication to and from each process are proven in isolation by a usual Hoare style axiomatic semantics, while abstract monitors are also specified in isolation by the method reviewed in the first part of the paper. These properties of the components of the system are then used in a new proof rule to conclude properties of the complete system. Stein Gjessing received a Ph.D. (actually a Dr. philos.) from the University of Oslo (Norway) in 1985. Presently he is an Associate Professor at the Institute of informatics, University of Oslo, Norway. Dr. Gjessings research interests are in the area of concurrent and distributed programming, operating systems, formal specification and verification and programming languages.     

Stochastic balancing and approximation-stability and minimality

A new method of stochastic model reduction has recently been introduced by Desai et al. [1], [2]. The stability of the reduced order model has not previously, been considered. In this paper, we show that the stability of the reduced order model follows directly from the results of Pernebo and Silverman [3]. It is also shown that the reduced order model is minimal, in the controllability/observability sense. The relevance of this notion of minimality to stochastic minimality is made clear.     

Integrating and automating analysis and optimization

The development of an interface coupling program on personal computers for an analysis software system such as ANSYS, SAP, etc. and an optimization software system, MOST, is presented. By controlling and directing the communications the interface coupler integrates the two programs while retaining their versatility and interactive features. The integrated system is used to solve a numerical example of active noise control for a three-dimensional enclosure, in which an energy density level of control points is minimized by adding the sound source to cancel the unwanted noise. The interface coupling program automates with relatively low cost the iterative process for designing an engineering system, remaining flexible in acoustical modelling and efficient in equation solving. Also, the coupling interface is developed in a general-purpose way so that it can be expanded easily to integrate more analysis software packages of different kinds.