某型飞机告警系统“无泵压”故障信息处理方法

针对某型飞机告警系统的"无泵压"故障信息,对故障产生原因进行分析,通过多次定性模拟试验,总结了一套机上试验方案,可以准确地对故障原因进行判定。     

某型飞机改装虚警隔离后报“CO”虚警故障分析

某型飞机在外场飞行、维护和内场调试过程中,多次发生因虚警报"СО"(转速急降)故障,检查发现发动机及相关附件并无故障,而是由于改装虚警隔离相关电缆线路中所出现了故障而产生告警信号。针对这一故障现象,对改装虚警隔离装置的工作原理和线路故障进行分析,找出"СО"虚警故障的原因以及电缆故障的原因,提出修理和维护的方法和建议,为相关从业者提供借鉴。     

某型发动机报“降转”故障分析

通过对一例发动机报"降转"故障进行分析,确定了滑油温度传感器电缆接头处断路是造成该发动机故障的直接原因。同时还分析飞行参数上显示的该故障与触发信号"滑油温度高"无对应关系的原因。     

“设备舱热”故障的快速定位方法研究

针对环控系统经常报"设备舱热"故障,结合以往的排故经验,通过增加检测方法、建立运行数据库等手段,梳理出了一套"设备舱热"故障的排故思路,以供同行参考。     

某型飞机空中座舱失密故障分析

某型飞机飞行中报出"座舱高度超过8km"告警信息,故障信息显示"座舱失密"。通过对座舱密封系统进行原理分析,结合地面检查结果定位故障部件,并对故障件进行分解检查和试验,明确了故障的根本原因,制定了相应的维修措施。     

APS3200型APU点火失效的分析与研究

点火失效是APS3200型APU起动过程中的典型故障之一,本文根据APU点火系统和燃油系统的工作原理,结合APU试车数据给出了系统的排故思路,根据具体的故障现象以及各种故障诱因的可能性制作了点火失效的排故决策图,并对每一种诱因给出了理论分析和解决方法,同时对APU起动点火过程中可能出现的两种"假故障"进行了分析和说明,该研究可提高APS3200型APU点火失效故障的排故效率。     

面向航天器在轨管理的混合智能诊断系统设计

针对目前航天器专家系统普遍存在的"知识获取瓶颈"、"处理效率低"、"知识结构直观性差"等问题,介绍了一种新的混合智能诊断系统。该系统在使用基于规则推理进行故障征兆识别的基础上,一方面利用案例推理技术实现故障的快速诊断;另一方面利用故障树分析法给出详细的推理过程和推理结果。文中介绍了这种混合智能诊断系统的系统构成、诊断流程和推理算法。     

某型飞机一起“超温Ⅰ”告警故障分析与排除

针对一起"超温Ⅰ"告警故障,通过机理分析,确定了故障原因,并对由温度限制器引起的故障进行了排除,为类似故障的排除提供参考。     

“奖状”680飞机前起落架组件故障分析

针对"奖状"680飞机前起落架收放故障多次频发进行了分析,查找故障的原因,制定了针对性的防范措施,为后续开展此类故障的分析提供参考。     

基于新型多分类支持向量算法的发动机故障诊断

层次支持向量机(H-SVM)比通常的"一对多" (1-V-R)和"一对一" (1-V-1)等多分类支持向量算法具有更快的训练速度和分类速度.提出一种基于H-SVM的航空发动机气路部件故障诊断方法,根据特征空间中各类故障样本中心之间的距离来逐层划分子类,距离较近的故障样本归为同一个子类进行训练,得到的H-SVM层次结构合理,各层的SVM分类间隔大、泛化能力强;同时,用ν-SVM代替通常的C-SVM作为两类分类器,分类器参数意义明确、变化范围小,更容易确定.仿真实验表明,基于H-SVM的故障分类器具有良好的分类准确性和泛化性能,能够对发动机气路部件的单一故障和复合故障进行快速诊断.     

“Reinventing” career development

The following topics are dealt: career development definition; career development as a part of effective management; job satisfaction issues; motivated abilities; a case study results; identification of motivational patterns; and 'reinvention' of career development     

Magnetospheric Science Objectives of the <Emphasis Type="Italic">Juno</Emphasis> Mission

In July 2016, NASA’s Juno mission becomes the first spacecraft to enter polar orbit of Jupiter and venture deep into unexplored polar territories of the magnetosphere. Focusing on these polar regions, we review current understanding of the structure and dynamics of the magnetosphere and summarize the outstanding issues. The Juno mission profile involves (a) a several-week approach from the dawn side of Jupiter’s magnetosphere, with an orbit-insertion maneuver on July 6, 2016; (b) a 107-day capture orbit, also on the dawn flank; and (c) a series of thirty 11-day science orbits with the spacecraft flying over Jupiter’s poles and ducking under the radiation belts. We show how Juno’s view of the magnetosphere evolves over the year of science orbits. The Juno spacecraft carries a range of instruments that take particles and fields measurements, remote sensing observations of auroral emissions at UV, visible, IR and radio wavelengths, and detect microwave emission from Jupiter’s radiation belts. We summarize how these Juno measurements address issues of auroral processes, microphysical plasma physics, ionosphere-magnetosphere and satellite-magnetosphere coupling, sources and sinks of plasma, the radiation belts, and the dynamics of the outer magnetosphere. To reach Jupiter, the Juno spacecraft passed close to the Earth on October 9, 2013, gaining the necessary energy to get to Jupiter. The Earth flyby provided an opportunity to test Juno’s instrumentation as well as take scientific data in the terrestrial magnetosphere, in conjunction with ground-based and Earth-orbiting assets.     

具有纳米结构的 VO₂ 相变薄膜

 采用无机溶胶-凝胶法制备VO₂相变薄膜，该薄膜相变时的电阻（率）突变可达4～5个数量级。并用XRD,DSC和TGA法研究了制膜过程中干凝胶膜的层状非晶纳米结构。通过适当的非晶晶化过程及随后V₂O₅→VO₂转变的真空热处理，可获得带有空洞（void）结构的低密度纳米薄膜，从而使电阻（率）突变特性异常优异。     

Fuel cells for “personal electricity”

Cars powered by fuel cells have been built and tested; however, the aerospace fuel cells could not deliver high power quickly when the driver wanted to accelerate his car. Today's hybrid electric cars carry a battery that supplies the acceleration power, and the prime power source, whether an engine or fuel cell, is not stressed with sudden load peaks. Zero air pollution becomes attainable when fuel-cells supply the prime power on a hybrid vehicle     

H_∞中的规范化LCF法在综合控制系统设计中的应用

 用鲁棒控制理论中的规范化左互质因子分解(规范化LCF)法为某型飞机设计纵向飞/推综合控制器,并总结了该方法的一些特点和设计要求。设计出的控制器满足实际工程要求,得到比较满意的控制效果。     

Simulation of <Emphasis Type="Italic">Z</Emphasis>-crimp shaping with the use of the ansys finite element software

A finite element model of the Z-crimp shaping from a hard sheet blank is developed and a number of calculations using the ANSYS finite element software is conducted. The calculations are carried out in the framework of elastoplastic behavior of the blank material using the classical model of bilinear kinematic (translational) hardening with corresponding parameters of elasticity and plasticity. The model takes into account kinematics of spatial transformation of the shaping equipment as well as the time-variable conditions of its contact interaction with the blank.     

Sedimentation stability of fullerene C<Subscript>60</Subscript> particles in sulphamate nickel-plating electrolyte

The techniques of injecting nanomodifiers into the sulphamate electrolyte used for electrolytic forming of nickel antiabrasive protective tipping are considered. The optimal concentration of surfactant and nanomodifier are determined. The graphs are also presented.     

工业再设计破局“中国制造2025”

安世亚太和苏氏集团正式结为战略联盟,利用各自的优势打造集成"精益研发技术+精密铸造工艺"的工业再设计体系。战略联盟的建立将安世亚太精益研发、工程仿真技术与苏氏精密铸造工艺相结合,启动工程仿真驱动的工业再设计过程,让设计突破工艺局限,敢于跨量级优化,并产生颠覆式创新。     

“Dakota Sun”-the next generation solar powered racingvehicle

Based on the experience gained from Sunrayce '95, the Solar Motion Team has made many changes to the design of the next generation solar car. These changes have resulted in a vehicle that is very different from the “Solar Rolar”, The Dakota Sun is a three wheeled vehicle with separate cab and solar array. This design allows for improved aerodynamics, decreased weight, lower rolling resistance, and ease of manufacture compared to the four wheeled catamaran used in the last race. However, this design sacrifices total enclosed wheel base area, additional room for components, and added power from side solar panels, The major objectives for the team's redesigned Sunrayce '97 entry are: systems integration; decrease the weight of the car; decrease aerodynamic drag; more efficient use of available energy; and increased driver safety. The team has set a standard to use the latest available technology. Although this increases the complexity of the components, by using a systems engineering approach the “Dakota Sun” has evolved into a more integrated vehicle. This philosophy of integrated design has resulted in great improvements in mechanical design and manufacturing techniques, as well as electrical innovations. The major design changes evident from the original Sunraycen '95 vehicle are the result of an evolutionary design process that has produced the highly competitive Sunraycel '97 design outlined in this article