基于模糊层次分析法的航空装备结构优化分析

航空装备结构优化的问题，是一个关系到整个航空装备体系的效能能否最大限度地发挥的重大问题。本文将航空装备蛄构视为一个多目标决策问题，构建了评价航空装备结构优劣的指标体系，井用层次分析法进行了实证计算。     

浅析低空风切变及其探测技术

低空风切变是一种在飞机起降阶段危害飞行安全的气象现象,通过介绍目前常用的一些探测技术,以帮助读者提高对低空风切变及其探测技术的认识.     

An aviation oxygen supply system based on a mechanical ventilation model

At high altitudes, an Aviation Oxygen Supply System(AOSS) protects pilots from low pressure and hypoxia by continuously providing oxygen corresponding to the pilots' dynamic respiratory properties.An AOSS mainly consists of oxygen supercharging machines which are used in a high-altitude flight cabin to supply pressurized oxygen to pilots.Therefore, it is of great significance to study the airflow dynamic characteristics of an AOSS for safe, continuous, and efficient oxygen supply.In this paper, an AOSS is firstly simplified and considered as a mechanical ventilation system.Then, its corresponding mathematical model is constructed.Next, to verify the mathematical model, a prototype AOSS with a lung simulator is proposed for an experimental study.Afterwards, to build a foundation for the optimization of the AOSS, the airflow dynamic characteristics of an aircraft are analyzed, and the effects of key parameters on the respiration system are researched.Through experimental and simulation studies, it can be concluded that the mathematical model is effective.Subsequently, for stability during the respiration process, we consider setting the equivalent throttling areas of the inspiration and expiration pipelines smaller within certain limits; additionally, an excessively high oxygen supply pressure will disturb smooth airflow, and in a low-pressure environment, the pressure can be 84 cm H_2O lower than the standard atmospheric pressure.This research can be referred to in the design of an oxygen supply system and the study on optimization of airflow dynamic characteristics.     

民用航空产品研发和审定活动中的需求分析与管理问题研究

研究了民用航空产品研发和审定过程中有关需求分析与管理的若干问题。总结了开展需求分析和管理过程的步骤和关键要素。阐明需求分析与管理在民机研发和审定过程中的重要作用。分析了当前我国在民用航空产品研发和审定过程中存在的问题。提出解决我国民用航空产品研发和审定过程需求分析和管理突出矛盾的方案。     

低空空域开放促进我国通用航空的发展

随着低空空域的开放,通用航空将会得到飞速的发展。通用航空机动灵活,可应用于农、林、牧、渔、工业、建筑、科研、交通、娱乐等行业,作业项目主要有航空摄影、医疗救护、气象探测、人工降雨等,通过对比国内外通用航空状况,分析了我国通用航空的发展趋势,以期更多的有志人士能为我国通用航空做出贡献。     

产学合作教育培养民航创新人才的探索

产学合作教育是一种教育思想，也是培养技术应用型人才的重要模式，通过对广州民航职院产学合作教育培养民航高技能创新人才的探索，形成了自己独特的行业特色，受到了用人单位的欢迎，在产学合作教育方面积累了一定的经验，也为兄弟院校提供了借鉴。     

事理图谱赋能的航空数据智能技术研究

大数据、人工智能等新一代信息技术对航空制造业数字化转型具有重要推动作用。针对航空制造业数据多源异构、样本少、强关联等特征,利用知识图谱等新一代知识工程技术对数据的结构化描述、高效管理的能力,提出基于事理图谱的航空数据智能技术体系和分析流程,重点研究面向航空领域数据的本体建模、事件关系识别、事件抽取、事件消歧等技术方法,并选择某单位航空产品开展质量问题原因分类、质量事理图谱构建、事理知识推送等应用及原型系统建设,辅助进行质量问题审理,推动质量问题快速反应。结果表明：利用数据和知识开展数据智能化质量管理的技术体系和路径可行,基于事理图谱的质量知识抽取算法具有较强的实用性,为推进航空制造业全生命周期全过程数据智能化应用提供支撑。     

空气辅助雾化对活塞式航空煤油发动机燃烧特性的影响研究

为了满足无人机燃料的安全性、单一化战略,并实现发动机高功重比指标,此文将航空煤油应用在点燃式活塞发动机上,使用自主开发的空气辅助喷雾系统,在节气门全开条件下进行了不同过量空气系数、喷气压力、喷气脉宽、喷射时刻对于活塞式航空煤油发动机燃烧特性的影响研究,并将空气辅助雾化系统和120MPa高压共轨系统进行对比试验。结果表明,0.95为活塞式航空煤油发动机的最佳过量空气系数;提高喷气压力和喷气脉宽均会提高发动机的动力性和经济性,提高燃烧稳定性,并且提高喷气压力可以明显缩短燃烧持续期;360 ?CA BTDC喷气时刻时航空煤油的雾化效果最好;喷射参数优化后的空气辅助雾化系统对于航空煤油的雾化效果接近高压共轨系统水平。     

浅析FAA和CAAC制造检查领域委任代表的授权职能

基于民用航空器制造的实践经验和美国联邦航空局（Federal Aviation Administration,以下简称FAA）与中国民用航空局（Civil Aviation Administration of China,以下简称 CAAC）适航规章的研究,重点分析了FAA与CAAC制造符合性检查领域对委任代表的授权职能。从适航规章要求、制造符合性检查领域委任代表的分类、具体的授权职能及产生这些差异的原因进行了阐述。虽然两个民航局在制造符合性检查的授权职能上存在差异,但是只有与航空工业水平相适应的适航管理,才能更好地促进航空业的发展。     

Effect of fuel type on the performance of an aircraft fuel tank oxygen-consuming inerting system

The properties of aviation fuel have a great influence on the performance of oxygen-consuming inerting systems. Based on the establishment of the catalytic inerting process, the flow relationship of each gas component flowing through the catalytic reactor was derived. The mathematical model of the gas concentration in the gas phase of the fuel tank was established based on the mass conservation equation, and the fuel tank model was verified by performing experiments. The results showed that the fuel type exerts a considerably higher influence on the performance of the oxygen-consuming inerting system compared to the corresponding influence on the hollow fiber membrane system, and the relative magnitude of the inerting rates of the four fuel types is RP5 > RP3 > RP6 > JP8. In addition, a higher catalytic efficiency or fuel load rate corresponds to a higher rate of decrease of the oxygen concentration in the gas phase, and the inerting time is inversely proportional to the suction flow rate of the fan. When different fuels are used, the amount of cooling gas and water released from the inerting system are different. Therefore, the influence of fuel type on the system performance should be extensively considered in the future.