波音737NG飞机启动活门常见故障分析及处理

通过对飞机运行过程中启动活门出现的故障进行收集、分类和描述,剖析启动系统工作原理、启动活门组成及工作原理,判断故障发生的原因,提出排故的方法,为一线飞机维修人员高效完成启动活门排故工作提供参考。     

一起B737—700飞机发动机不能起动的排故分析

这是一篇有关一起B737—700飞机左发由于燃油控制系统不能向发动机供油而导致不能起动的排故介绍，由于飞机相关手册的不完善，使整个排故过程比较艰难，但排故结果却值得总结。这起故障的排除，也为B737NG飞机的排故提供了一个新的案例，导致BOEING将对故障隔离手册(FIM)做出适当的修改。     

基于 QAR 数据的波音737NG 飞机辅助排故系统

利用 QAR 数据资源,结合目前先进的数据库分析技术,形成了波音737NG 飞机基于 QAR 数据的辅助排故系统。本系统注重实际应用,从参数译码、参数可视化、趋势分析、排故指导、故障预测等方面,为机务人员提供可靠而方便的支持,提高了737NG 飞机的维护效率。     

飞机系统部件故障分布研究

实践证明以可靠性为中心的飞机维护理论和思想是科学和正确的,但在实际飞机维修过程中却没有从本质和系统的观点来认识和解决问题或故障,这不仅会影响排故的彻底性和航班正常性,对航空公司的经济效益也是不利的。根据对飞机系统部件故障分布特性的研究,从概率的角度,通过收集大量的飞机维修工作记录或部件更换数据而建立相应数据库,用一套科学的方法来分析、计算和估算出飞机系统部件故障分布律、分布参数和部件重要可靠性数据;揭示了飞机系统故障的本质和客观规律、研究目的和科学运用,适用于各种类型的航空器,具有普遍的现实意义、深远意义。     

飞机电缆典型故障分析

以飞机电缆发生的典型故障为例,详细分析了飞机电缆产生故障的主要原因,并给出了相应的解决措施,为飞机电缆的修理及排故工作提供指导。     

SR20飞机空调系统概述及故障分析

针对西锐SR20飞机搭载空调系统的结构特点,对该系统的工作原理进行概述,并结合2019年洛阳分院使用维护期间该系统出现的故障原因进行分析,为该型飞机空调系统的日常维护和排故提供参考。     

E190飞机应急停留刹车故障模式分析

应急停留刹车故障在飞机运行中故障率较高,对飞机运行品质有重要影响。本文以E190飞机为研究对象,梳理机队运行数据,基于应急停留刹车系统工作原理和机队历史数据分析故障模式及排除方法,为同机型和其他机型应急停留刹车系统的日常维护、排故提供参考。     

AIDS参数在空客A320飞机起落架控制系统排故中的应用

结合某空客A320飞机起落架控制系统故障,在对系统原理逻辑进行分析的基础上,利用飞机综合数据系统AIDS的LABEL参数,寻找新的排故思路和方法,有效提升了排故工作效率和准确性,对异地AOG支援的排故方案和航材准备也有重要意义。     

ARJ21-700飞机左右气压高度不一致故障分析

全静压系统是飞机的重要系统,该系统泄漏或堵塞是波音和空客飞机的常见故障。ARJ21飞机也出现过全静压系统的相关故障。本文介绍了ARJ21飞机全静压系统的工作原理和故障排除过程,并向制造厂家排故手册的修订提出了合理化建议,也可为其他航司排除相关故障提供参考。     

E190飞机空调温控系统无故障信息故障模式分析

飞机空调温控系统对飞机运行品质有着重要的影响.本文以E190飞机为研究对象,梳理机队运行数据,基于空调温控系统工作原理分析其故障模式以及排除方法,为同机型或同类型温控系统的日常维护、排故提供参考.     

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On-board multibeam deployable antennas using Ka,C, andS frequency bands

The configuration, on-ground tests, and design verification results for the multibeam antenna flight model for Engineering Test Satellite-VI (ETS-VI) are described for onboard multibeam antennas with thirteen and five beams for the Ka- and S-bands, respectively. The antennas feature Ka-band frequency reuse in alternate beams through use of a cluster horn; shared use of a reflector for two frequency bands using a novel frequency selective surface (FSS); large, lightweight deployable main reflectors with diameters of 3.5 m and 2.5 m; and a highly accurate antenna-pointing control system consisting of RF sensors and an antenna-pointing mechanism to drive the subreflector     

CCRS C/X-airborne synthetic aperture radar: An Rand D tool for the ERS-1 time frame

The airborne synthetic-aperture radar (SAR) system developed for the Canada Centre for Remote Sensing (CCRS) is described. It consists of two radars, at C-band and X-band. Each radar incorporates the following features: dual-channel receivers and dual-polarized antennas; a high quality, 7-look, real-time processor; a sensitivity time control for range-dependent gain control; a motion-compensation system for antenna steering in azimuth and elevation; and baseband I and Q signal phase rotation. The system also uses a high-power transmitter with a low-power back-up. The SAR maps to either side of the aircraft, at high or low resolution, at incidence angles which in high resolution span 0° to 80°. Radar operating parameters, data products, key specifications and the motion compensation scheme used are presented. Properties of the real-time imagery are discussed and examples of C-band SAR data in the three operating modes are given     

Sco X-1

The physical properties of X-ray, optical and radio emissions from Sco X-1 are reviewed. Sco X-1 is a typical X-ray source which has an optically thick hot plasma. The observational spectra of X-ray and optical emissions are consistent with theoretical ones from the hot plasma, but the radio emission shows a non-thermal feature. The restrictive conditions for the model of Sco X-1 are discussed from the observational facts. In spite of numerous observational facts on Sco X-1 further detailed and elaborate studies are necessary to understand this object and general compact X-ray sources comprehensively.     

Parallel resonant converter with LLC-type commutation

It is shown that by using a proper transformation of state variables, the third-order system of the parallel resonant converter (PRC) with LLC-type commutation can be analyzed by means of a two-dimensional state-plane diagram. A set of characteristic curves which can be used for the converter design is derived from the analysis. It is shown from these curves that the converter possesses more desirable features than the conventional PRC