余度管理中故障监控门限值的选取

本文讨论了余度管理中故障监控门限值的选取。门限值的选取对监控系统性能有很大影响。本文通过分析的方法求门限值的最优值。该方法具有一定的准确性,可以作为实际选取门限值的参考。     

机载短波电台使用问题分析

结合当前短波通信领域的发展,针对机载短波电台使用中存在的问题对短波电台的科学使用进行分析,并提出几点建议。     

飞机结构健康监测与管理技术研究进展和展望

飞机结构是飞机平台的基础,是确保飞机安全、长寿命使用的最重要的承力架构.随着航空技术的不断发展,飞机设计思想不断演变发展,对飞机机体结构性能也不断提出更高的要求.严酷的使用环境和严格的功能/性能综合要求,使得结构完整性面临重大挑战.飞机结构健康监测与管理技术具有实时性、在线性等优势,是保证结构安全性、降低维护费用的重要...     

State of art on energy management strategy for hybrid-powered unmanned aerial vehicle

New energy sources such as solar energy and hydrogen energy have been applied to the Unmanned Aerial Vehicle(UAV), which could be formed as the hybrid power sources due to the requirement of miniaturization, lightweight, and environmental protection issue for UAV. Hybrid electrical propulsion technology has been used in UAV and it further enforces this trend for the evolution to the Hybrid-Powered System(HPS). In order to realize long endurance flight mission and improve the energy efficiency of UAV, many researching works are focused on the Energy Management Strategy(EMS) of the HPS with digital simulation, ground demonstration platforms and a few flight tests for the UAV in recent years. energy management strategy, in which off-line or on-line control algorithms acted as the core part, could optimize dynamic electrical power distribution further and directly affect the efficiency and fuel economy of hybrid-powered system onboard.In order to give the guideline for this emerging technology for UAV, this paper presents a review of the topic highlighting energy optimal management strategies of UAV. The characteristics of typical new energy sources applied in UAV are summarized firstly, and then the classification and analysis of the architecture for hybrid power systems in UAV are presented. In the context of new energy sources and configuration of energy system, a comprehensive comparison and analysis for the state of art of EMS are presented, and the various levels of complexity and accuracy of EMS are considered in terms of real time, computational burden and optimization performance based on the optimal control and operational modes of UAV. Finally, the tendency and challenges of energy management strategy applied to the UAV have been forecasted.     

Aircraft engine fault detection based on grouped convolutional denoising autoencoders

Many existing aircraft engine fault detection methods are highly dependent on performance deviation data that are provided by the original equipment manufacturer. To improve the independent engine fault detection ability, Aircraft Communications Addressing and Reporting System (ACARS) data can be used. However, owing to the characteristics of high dimension, complex correlations between parameters, and large noise content, it is difficult for existing methods to detect faults effectively by using ACARS data. To solve this problem, a novel engine fault detection method based on original ACARS data is proposed. First, inspired by computer vision methods, all variables were divided into separated groups according to their correlations. Then, an improved convolutional denoising autoencoder was used to extract the features of each group. Finally, all of the extracted features were fused to form feature vectors. Thereby, fault samples could be identified based on these feature vectors. Experiments were conducted to validate the effectiveness and efficiency of our method and other competing methods by considering real ACARS data as the data source. The results reveal the good performance of our method with regard to comprehensive fault detection and robustness. Additionally, the computational and time costs of our method are shown to be relatively low.     

基于策略的遥感卫星管控方法研究

针对遥感卫星管理控制中业务应用与底层调度紧耦合导致的操作复杂、人工干预多等问题,提出一种基于策略的遥感卫星管控方法。在搭建策略管控模型的基础上,采用分层控制闭环结构,构建卫星控制闭环;提出卫星集群分域管理方法,并设置策略部署机制;详细论述了基于策略的遥感卫星管控实现方法;以海上失联舰船搜救任务为典型案例进行仿真,验证该方法可以完成异构卫星集群基于事件驱动的闭环控制。基于策略的管理方法能够有效降低遥感卫星管控业务的复杂度,实现遥感卫星集群的自动控制。     

一种授权质量管理的组织文化(英文)

随着东南亚国家的工业化,香港制造业面临的市场竞争日益激烈。香港的厂家若继续过分依赖中国的廉价生产成本优势,已不能维持其竞争力。只有把“全面性质量管理”（ＴＱＭ）作为企业策略,并不断改善产品质量,才能达到增长利润和改善竞争力等目的。在推行ＴＱＭ时,仅依靠质量改善的“硬件”,而忽略了机构品质文化的培养,产品质量的改善会收到一定限制。通过人力管理培养和质量的改善,可以为香港制造业培养出一种良好的机构品质文化,从而使香港制造业更加蓬勃发展。     

基于客户／服务器的车间控制器

车间管理与控制是制造企业的环节,是管理层与执行层的结合部,同时还是信息流与物流的交汇点,因而成为ＣＩＭＳ实现集成的重要组成环节。而客户／服务器模式是当今信息处理的主导模式,研究开发基于客户／服务器体系结构的车间控制器,可取得投资少见效快的效果。本文介绍了基于客户／服务器体系结构的车间控制器原理和开发方法,并给出了应用ＯＲＡＣＬＥ数据库开发的,以成都飞机制造公司ＣＩＭＳ工程（ＣＡＣ－ＣＩＭＳ）为前进     

管理信息系统灵活性的设计与实现

管理信息系统（Ｍａｎａｇｅｍｅｎｔ ｉｎｆｏｒｍａｔｉｏｎ ｓｙｓｔｅｍ,ＭＩＳ）的应用是现代企业发展壮大的必要手段。然而由于企业管理体制及模式的变化,不可避免地导致管理数据的内容和格式会发生变化,这就要求ＭＩＳ具有较高的通用性和灵活性,能够开放一些数据结构和功能,由用户自己设计和定义。文中通过分析通用ＭＩＳ软件和定制ＭＩＳ软件的特性,提出了在开发ＭＩＳ时,通过系统结构数据化和系统数据用户化的方法     

化学计量及其在固体推进剂研制中的作用

介绍了化学计量的概念、化学计量标准和化学量值方式的特点；论述了在固体推进剂行业中，化学计量的标准物质、标准方法和计量测试仪器的应用及其对推进剂研制质量保证的重要作用。