飞机滑油系统故障分析

在分析飞机滑油系统工作原理的基础上，对某型飞机滑油系统中存在的一些故障，包括滑油变色或混有金属屑、滑油消耗量超过规定、系统漏油外部漏油、滑油箱油量增多、滑油箱油量减少等进行了分析，并相应提出了在使用和维护中应注意的问题，为航空机务维护实践提供有益的借鉴。     

新型滑油净化加油车的研制

针对目前航空兵部队因航空滑油污染造成滑油系统故障率高的问题，设计、制做了一种新型的滑油净化加油车，实现了对滑油进行净化处理和给飞机加油的功能，并介绍了装置的组成、工作原理性能特点和部队应用情况。     

滑油净化加油车的设计与应用

针对目前航空兵部队因航空滑油污染造成滑油系统故障率高的问题，设计、制作了一种新型的滑油净化加油车，实现了对滑油进行净化处理和给飞机加油的功能，并介绍了装置的组成、工作原理性能特点和部队应用情况。     

新型发动机滑油系统故障预防与分析

主要介绍新型飞机的滑油系统，并结合该型飞机实际工作情况，对滑油系统所产生的故障进行综合分析，提出了一些具体的解决措施。     

典型航空活塞发动机滑油系统工作及故障判断

近年来通用航空发展迅猛,各类小型活塞式飞机应用广泛.若低空开放后小型通用飞机将快速普及,而滑油系统的良好与否对活塞式飞机的正常工作至关重要.文中重点介绍了滑油系统的工作原理,故障判断以及使用中的注意事项.     

高精度滑油净化装置的设计与应用

对目前航空兵部队因航空滑油污染造成滑油系统故障率高的问题，设计、制作一种新型的高精度滤油机，实现对滑油进行净化处理和给飞机加油的功能，并介绍装置的组成、工作原理性能特点和部队应用情况。     

YHC-01型液滑油加油车的设计

针对目前航空兵部队在液压油、滑油的加添过程中存在的不足,设计制作了一种新型的液滑加油车,该车能同时为飞机液压和滑油系统补充油液.简要介绍了该车的组成、结构、工作原理、使用方法和注意事项以及污染度检查周期.     

飞机维修时航空发动机滑油系统污染防控措施探析

飞机维修的过程当中,特别容易出现各种各样问题,直接影响到飞机航行安全性以及稳定性,其中,发动机滑油系统经常会出现污染,这是目前飞机维修的过程当中经常出现的问题,因此,相关工作人员应当充分了解污染产生的原因,同时应当结合滑油系统特点采取科学有效措施加强污染控制。本文主要是关于飞机维修航空发动机滑油系统污染防控措施的研究,以供相关专业人士进行参考和借鉴。     

新型液滑油加油车的设计

针对目前航空兵部队在实施液压油、滑油的加添过程中存在的不足,设计制作一种新型的液滑加油车,该车能同时为飞机液压和滑油系统补充油液.并简要介绍了该车的结构、工作原理、使用方法、注意事项及污染度检查周期.     

CFM56-5B发动机滑油供油滤漏油原因及更换滤芯操作风险

通过实例分析空客A320系列飞机所安装GE公司CFM56-5B发动机滑油供油滤的漏油原因，及其与施工人员在拆装过程中的手册指引及操作失误的关联，找出其中的风险点所在，并指出更为合理正确的操作方式，从而避免造成滑油泄漏进而引起发动机空中停车的严重后果。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

Limits of topographic measurement by the scanning tunnelling and atomic force microscopes

Parameters describing the topographic character of a surface (height, surface wavelength, slope and curvature) can be derived from equivalent sinusoidal profiles. The response of a surface-measuring instrument may be modelled in terms of instrument parameters such as stylus radius, and scanning range and resolution. The performance of the instrument may then be mapped as a zone in amplitude-wavelength (AW) space to show the sinusoidal profiles it is capable of measuring. In a first-order analysis the STM and AFM are considered as equivalent to contact-stylus instruments with a notional stylus radius equal to the tip radius plus the gap. Comparisons between different instruments and types of instrument are readily made by mapping in AW space. The error arising from convolution of the sinusoidal profile with that of the finite tip may be quantified and plotted as contours in AW space.     

Fractional order nonsingular terminal sliding mode control for flexible spacecraft attitude tracking

This paper investigates a fractional terminal sliding mode control for flexible spacecraft attitude tracking in the presence of inertia uncertainties and extern...     

奥氏体不锈钢表面双辉等离子渗锆的动力学

利用双辉等离子渗金属技术在0Cr18Ni9Ti奥氏体不锈钢表面制备了一层均匀、致密、呈良好冶金结合的渗锆合金层,并对1 060℃下的渗锆动力学进行了研究。结果表明:随着距锆合金层表面距离的增加,锆元素的含量呈梯度递减,扩散系数逐渐减小,而扩散激活能逐步增大;在1 060℃采用双辉等离子技术渗锆时,渗锆合金层表层的空位密度为2.945×(1012~1013)cm-2,与相同温度下采用常规渗金属工艺相比,提高了1~2个数量级。     

气化炉三维扫描测量与数据处理

以德士古气化炉耐火砖的内壁蚀损检测设备为基础,对采集到的点云数据做了进一步处理.通过对数据的筛选和剔除,实现了数据点的平滑降噪细化和精简.然后利用点云对整、网格划分和分色显示等方法,最终完成了内壁腐蚀情况的三维建模.重点讨论了点云数据的预处理及后处理的方法,并根据内壁耐火砖的腐蚀阈值,提出了一种气化炉内壁腐蚀区域的识别与分割方法.对耐火砖的腐蚀分析、气化炉的生产与维修提供了可靠依据,并在工程应用中获得了一致认可.