CATIA Tubing Design模块客户化研究

采用CATIA Tubing Design模块进行管路设计必须按设计标准进行客户化定制.研究了CATIA Tubing Design模块客户化定制的方法,包括项目定制、系统文件定制及管路零部件库定制.研究了管路零部件端头属性的兼容性规则及零部件的自动摆放规则,以实现管路零部件自动摆放；阐述了直硬管、弯硬管及软管的建模方法.     

Development of Kabila rocket: A radioisotope heated thermionic plasma rocket engine

A new type of plasma rocket engine, the Kabila rocket, using a radioisotope heated thermionic heating chamber instead of a conventional combustion chamber or catalyst bed is introduced and it achieves specific impulses similar to the ones of conventional solid and bipropellant rockets. Curium-244 is chosen as a radioisotope heat source and a thermal reductive layer is also used to obtain precise thermionic emissions. The self-sufficiency principle is applied by simultaneously heating up the emitting material with the radioisotope decay heat and by powering the different valves of the plasma rocket engine with the same radioisotope decay heat using a radioisotope thermoelectric generator. This rocket engine is then benchmarked against a 1 N hydrazine thruster configuration operated on one of the Pleiades-HR-1 constellation spacecraft. A maximal specific impulse and power saving of respectively 529 s and 32% are achieved with helium as propellant.Its advantages are its power saving capability, high specific impulses and simultaneous ease of storage and restart. It can however be extremely voluminous and potentially hazardous. The Kabila rocket is found to bring great benefits to the existing spacecraft and further research should optimize its geometric characteristics and investigate the physical principals of its operation.     

非齐次项为β^nPl（n）的常系数线性递推关系求特解方法

就非齐次项为βｎ与ｎ的多项式Ｐｌ（ｎ）乘积的常系数线性非齐次递推关系，给出了求特解的一般方法。     

Effect of nickel introduced by electroplating on pyrocarbon deposition of carbon-fiber preforms

In order to improve the deposition rate and microstructure of pyrocarbon, nickel was introduced by electroplating on carbon fibers and used as a catalyst during the deposition of pyrocarbon at 1000 C using methane as a precursor gas. The distribution of nickel catalyst and the microstructure of pyrocarbon were characterized by scanning electron microscopy（SEM）, energy dispersive spectroscopy（EDS）, X-ray diffraction（XRD）, and Raman micro-spectrometry. Results show that nano-sized nickel particles could be well distributed on carbon fibers and the pyrocarbon deposited catalytically had a smaller d002 value and a higher graphitization degree compared with that without catalyst. In addition, the deposition rate of pyrocarbon in each hour was measured.The deposition rate of pyrocarbon in the first hour was more than 10 times when carbon cloth substrates were doped with nickel catalysts as compared to the pure carbon cloths. The pyrocarbon gained by rapid deposition may include two parts, which are generation directly on the nickel catalyst and formation with the carbon nanofibers as crystal nucleus.     

特型钝体绕流动态特性的低速实验研究

在低速自由射流风洞上 ,利用热线及相关设备对由半球头部、颈部及旋成体构成的特型钝体周围非定常流动的基本特性、联合特性及湍流度分布进行了测试与分析 ,实验工况为迎角α=- 1 5°～ 1 5°、侧滑角 β =0°～ 1 0°。结果表明 ,在上述工况范围内 ,该钝体周围流场中速度脉动的能量分布平坦 ,属宽频带随机信号 ,流场中没有发生明显的流动分离 ,流场动态品质良好 ;凹陷区内气流的脉动以不同的速度向下游空间传播 ;在上述α、β变化范围内 ,钝体颈部凹陷区的最大湍流度高达 1 0 .9～ 2 4.8%。     

基于B/S架构的设备全寿命周期管理系统技术研究

研究了基于B/S架构(Browser/Server结构)的设备全寿命周期管理系统相关技术,论述了构成设备全寿命周期管理系统的架构设计与模块划分。将网络、多媒体、数据库等技术通过计算机软件系统开发的理论、技术和方法建立起的B/S架构应用于航空聚合物基复合材料厂的设备管理。该系统可使相关基础管理工作以信息化手段简化、固化与落实。     

飞机调压系统传递函数的建立及动态分析

本文说明如何建立飞机ＰＷＭ晶体管调压器的传递函数，包括：检比电路；调制、整形放大电路；功率放大电路及校正网络的传递函数。阐明了用实验法求取交流发电机的传递函数，及对飞机调压系统动态分析的基本方法。     

带单轴稳定惯导系统的初始对准

 一、概述 带单轴稳定的惯导系统是一种为避免或减小对陀螺进动角速率动态范围要求过大,而以现有挠性陀螺为基础构成的混合式惯导系统。在这种系统中,由于有一个可以任意控制转动的稳定轴,使实现对准的方法也具有一定的特点。例如可采用的方案之一是,把稳定轴锁定,利用与纯捷联式系统相类似的方法实现对准;另一种方案则是,使惯件测量部件的横向轴围绕稳定轴调平,然后再采用闭环或开环方式估计方位角和俯仰姿     

带单轴稳定的惯性导航系统

 根据平台式和捷联式惯性导航系统的主要特点,如何简化平台式系统的平台结构和减小捷联式系统对陀螺大动态范围的要求,降低成本并减小体积、重量和增加可靠性,是人们十分关心的事。为此,本文提出只沿飞行器横滚轴使用一个稳定回路的惯性导航系统。文中对该系统的原理构造及误差模型进行了叙述。以误差方程为基础,利用协方差分析方法,针对短程导弹假定的机动条件和飞行轨迹对其误差传播特性进行了模拟计算。在计算程序上采用了级数迭代算法。计算的结果对实际使用提供了参考。系统的基本工作特性近似于捷联式系统,但在很大程度上降低了对陀螺动态范围的要求,使得有可能实现既简单又可靠、成本低廉的短程飞行器使用的惯性导航与制导系统。     

固体火箭发动机装药寿命预示方法试验研究

研究了固体火箭发动机装药硬度和ＨＴＰＢ推进剂方坯硬度、强度及延伸率在贮试期内的变化规律，建立了装药硬度－强度、延伸率－贮存期相关联的数学模型和回归方程组。用其预估固体发动机装药寿命。