共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
波音飞机健康管理(Airplane Health Management,AHM)系统是一个先进的飞机维护工具。它收集并分析实时飞行状况下的关键飞行数据,并将飞机信息传输给维修工程师,使航空公司能避免耗时和高成本的维修延期,有计划地、轻松地解决维修问题,从而使飞机也能有更准点的运营,惠及航空公司、乘客和其他货运客户。 相似文献
3.
4.
伊尔─86是首次采用了可靠性、安全性和维修工艺性定量指标的伊尔型飞机。系统的综合可靠性工程贯穿于伊尔飞机的设计、生产和使用各个阶段。在设计伊尔─86飞机时,通过制定并实施《飞机设计、制造和使用各阶段可靠性保证、检测和验证制度》及《设计、批生产和使用阶段可靠性、安全性和维修工艺性保证综合大纲》来实现系统的综合解决办法。与这种飞机的其他机型比较,伊尔─86飞机可靠性有了很大提高。 相似文献
5.
本文对J8Ⅱ飞机KJ-12自动驾驶仪系统在03架飞机上装机调试工作中所出现的副翼舵机无规律零位飘移现象进行了分析,研究了引起舵机飘移的原因,可对该型飞机装备部队后自动驾驶仪系统的使用和维修提供参考。 相似文献
6.
《航空维修与工程》2005,(1)
飞机维修 AIRCRAFT MAINTENANCE国航成都维修基地全面展开飞机专检为了切实加强航线维修管理,国航工程技术分公司成都维修基地于去年12月初,全面展开了为期1个月的飞机专检工作,把《民航总局关于进一步加强航空安全工作的决定》落到了实处。该基地此次专检的对象主要是波音737-300/600、波音757-200、A340-300、A319五种机型共40架飞机,检查的重点主要集中在对飞机导航、防冰防雨、飞行控制、液压、起落架、发动机五个系统的操作性能、有效性和精确性的检测、调试和监控,而且根据每架飞机的具体情况其检查的侧重点也有所不同。Amec… 相似文献
7.
对导航设备的自动检测,提高检测、维修技术的精度和质量是实现飞机现代化维修手段的发展方向.本文根据导航设备自动检测系统的功能要求,提出用FPGA实现检测功能模块的设计,并应用FPGA实现了导航设备自动检测系统的通信连接. 相似文献
8.
9.
为了解决飞机襟翼维修测试问题,提出了一种飞机襟翼作动器维修与性能测试系统的设计方案。该系统采用伺服电机作为驱动端,采用液压加载来模拟飞机襟翼作动器的负载,由PLC控制液压加载并伺服驱动机构,实现了襟翼作动器负载模拟和性能测试。基于Win CC组态软件,开发了测试系统上位监控软件。模拟测试结果显示,襟翼作动器维修测试系统方案设计合理,能够满足飞机襟翼维修测试要求。 相似文献
10.
介绍了飞机航姿自动测试系统的设计要求和设计方法。该系统以嵌入式PC104工业控制计算机为核心,将飞机航姿自动测试系统的性能检测与故障诊断融于一体。实践证明,提高了部队的快速机动维修保障能力。 相似文献
11.
12.
NING Guo-dong ZHANG Shu-guang FANG Zhen-ping 《中国航空学报》2007,20(1):1-8
A method for the implementation of integrated three-degree-of-freedom constrained entry guidance for reusable launch vehicle is presented. Given any feasible entry conditions, terminal area energy management interface conditions, and the reference trajectory generated onboard then, the method can generate a longitudinal guidance profile rapidly, featuring linear quadratic regular method and a proportional-integral-derivative tracking law with time-varying gains, which satisfies all the entry corridor constraints and meets the requirements with high precision. Afterwards, by utilizing special features of crossrange parameter, establishing bank-reversal corridor, and determining bank-reversals according to dynamically adjusted method, the algorithm enables the lateral entry guidance system to fly a wide range of missions and provides reliable and good performance in the presence of significant aerodynamic modeling uncertainty. Fast trajectory guidance profiles and simulations with a reusable launch vehicle model for various missions and aerodynamic uncertain-ties are presented to demonstrate the capacity and reliability of this method. 相似文献
13.
基于飞机油箱模型形状特征油量测量切片步长选择方法研究 总被引:1,自引:0,他引:1
在分析飞机数字式油量测量过程中目前广泛使用的切片法油量测量原理的基础上,针对现有的定步长切片法无法得到准确、可靠的燃油质量特性数据库的缺陷,结合对飞机油箱模型形状特征的分析,提出了基于飞机油箱模型形状特征的油量测量切片步长选择方法。此方法包括切片步长整体和局部选择两个过程,整体选择以实现相邻两切片平面所夹油箱模型体积近似相等为目的来确定切片步长,以体现油箱模型截面整体变化规律;局部选择以设计切片平面与截面突变平面重合或尽可能接近的方式,突出油箱截面的局部变化特征。实验结果表明:该切片步长选择方法较定步长方法能够建立更为合理、可靠的燃油质量特性数据库,从而提高了油量测量精度。 相似文献
14.
The effect of inlet conditions on the flow and heat transfer in multiple rotating cavity with axial throughflow 总被引:1,自引:0,他引:1
This paper discusses experimental results from two different build configurations of a heated multiple rotating cavity test rig.Measurements of heat transfer from the discs and tangential velocities are presented.The test rig is a 70% full scale version of a high pressure compressor stack of an axial gas turbine engine.Of particular interest are the internal cylindrical cavities formed by adjacent discs and the interaction of these with a central axial throughflow of cooling air.Tests were carried out for a range of non-dimensional parameters representative of high pressure compressor internal air system flows(Re up to 5×106 and Rez up to 2×105).Two different builds have been tested.The most significant difference between these two build configurations is the size of the annular gap between the(non-rotating) drive shaft and the bores of the discs.The heat transfer data were obtained from thermocouple measurements of surface temperature and a conduction solution method.The velocity measurements were made using a two component,LDA system.The heat transfer results from the discs show differences between the two builds.This is attributed to the wider annular gap allowing more of the throughflow to penetrate into the cavity.There are also significant differences between the radial distributions of tangential velocity in the two builds of the test rig.For the narrow annular gap,there is an increase of non-dimensional tangential velocity V/Ωr with radial location to solid body rotation V/Ωr=1.For the wider annular gap,the non-dimensional velocities show a decrease with radial location to solid body rotation. 相似文献
15.
16.
17.
Abnormal Shape Mould Winding 总被引:1,自引:0,他引:1
Fu Hongya Wang Xianfeng Han Zhenyu Fu Yunzhong 《中国航空学报》2007,20(6):552-558
为解决网格化芯模的缠绕问题,本文提出了复合材料面片缠绕机理;接着详细分析了面片缠绕过程中的芯模凹曲面上纤维滑线和架空现象,应用微分几何曲面理论和空间几何理论,提出判据及其解决方案;最后,针对飞机发动机进气道的缠绕成型,编制缠绕控制程序并进行相应的实验,验证了面片缠绕方法的可行性。 相似文献
18.
FU Hong-jun MA Chong-qi KUANG Nai-hang LUAN Shi-lin 《中国航空学报》2007,20(2):124-128
This work was dedicated to performing surface oxidation and coating treatments on carbon fibers (CF) and investigating the changes of fiber surface properties after these treatments, including surface composition, relative volume of functional groups, and sur- face topography with X-ray photoelectron spectroscopy (XPS) and atom force microscopy (AFM) technology. The results show that, after oxidation treatments, interfacial properties between CF and non-polar polyarylacetylene (PAA) resin are remarkably modified by removing weak surface layers and increasing fiber surface roughness. Coating treatment by high char phenolic resin solution after oxida- tion makes interface of CF/PAA composites to be upgraded and the interfacial properties further bettered. 相似文献
19.
Xu Chenghai Meng Songhe Zhang Mingfu Zuo Hongbo Wang Guigen 《中国航空学报》2007,20(5):475-480
本文利用有限元法对冷心放肩微量提拉法(SAPMAC)生长大尺寸蓝宝石单晶过程中的热应力进行了模拟计算,应用临界缺陷理论解释了裂纹的萌生与扩展机理。研究表明,晶体内的热应力主要与晶体生长速率,环境温度和结晶取向有关;较大热应力多出现在结晶界面,放肩、收尾以及直径急剧变化等位置;最大热应力总是出现在籽晶与新生晶体的界面附近。裂纹将在临界缺陷位置产生,并在应力作用下沿a或m面扩展。计算结果与实验结果基本吻合,通过晶体生长系统和生长工艺的改进,对晶体的开裂问题得到了有效的抑制。 相似文献
20.
CHENG Wen-yuan CHANG Yan CUI De-gang XIE Xiang-hui 《中国航空学报》2007,20(1):55-59
To solve the topology optimization of complicated multi-objective continuous/discrete design variables in aircmit structure design, a Parallel Pareto Genetic Algorithm (PPGA) is presented based on grid platform in this paper. In the algorithm, the commercial finite element analysis (FEA) software is integrated as the calculating tool for analyzing the objective functions and the filter of Pareto solution set based on weight information is introduced to deal with the relationships among all objectives. Grid technology is utilized in PPGA to realize the distributed computations and the user interface is developed to realize the job submission and job management locally/remotely. Taking the aero-elastic tailoring of a composite wing for optimization as an example, a set of Pareto solutions are obtained for the decision-maker. The numerical results show that the aileron reversal problem can be solved by adding the limited skin weight in this system. The algorithm can be used to solve complicated topology optimization for composite structures in engineering and the computation efficiency can be improved greatly by using the grid platform that aggregates numerous idle resources. 相似文献