自旋卫星红外地中脉冲丢失情况下姿态确定分析与应用

实际应用中,由于遥测故障或脉冲重叠等多种原因,获取姿态脉冲信息时,可能缺少某些测量脉冲,为姿态确定的方法选择造成一定难度。针对海上测量弧段,某自旋卫星在红外地中脉冲丢失,仅有地出脉冲以及太1、太2脉冲时的几何定姿方法问题,通过对其原理、概念进行分析,制定自旋卫星红外地中脉冲丢失情况下定姿的方案与方法。该方法主要用于海上实时姿态监视,应急情况下也可以用于姿态的粗控。该研究为航天测量船应用测控软件的设计提供了良好基础。     

浅谈陶瓷基复合材料无损检测方法及其进展

陶瓷基复合材料由于其具有耐高温、密度低、抗氧化性好等多种优良特性目前已广泛地应用于航空航天领域。采用无损检测方法对陶瓷基复合材料进行相关检测对保证材料产品质量以及提高产品使用的可靠性等都具有重要意义。综述了陶瓷基复合材料无损检测发展现状,阐述了太赫兹、X射线、工业CT、红外热成像、超声波及声发射技术等常用陶瓷基复合材料检测手段的原理并介绍了其在陶瓷基复合材料无损检测方面的应用实例。     

机载曳光弹的紫外产生机理

立足于现有装备的基础上,大力发展经济,可靠,方便的紫外干扰技术,对我军而言不啻是一种我服的有效手段,在原子物理学理论指导下,本文详细地介绍了产生紫外线光谱重要的一环,原子材料紫外光谱的产生方法,文章的末尾还给出了实验的结果。     

Low-velocity impact response and infrared radiation characteristics of thermoplastic/thermoset composites

The low-velocity impact response and infrared radiation characteristics of composites have rarely been focused on simultaneously. This study aims to investigate the low-velocity impact response and infrared radiation characteristics of the glass fiber reinforced thermoplastic polypropylene and carbon fiber reinforced thermosetting epoxy resin laminates wildly used in the aircraft industry. The impact tests were conducted at five energy levels. Characterization parameters such as impact load, dis...     

超快激光诱导等离子体成丝光谱

飞秒激光等离子体光丝大气中传输的独特物理过程在航天领域具有重要的应用前景。采用仿真与实验,验证了飞秒等离子体成丝的光谱展宽特征,获得了超快等离子体光丝在不同参数特征下,覆盖从可见到红外探测系统的波谱范围,及保持系统相对稳定的特征,对于借助强激光等离子体光丝光谱进行红外特征探测具有重要的启发作用。     

Solar X-ray Monitor (XSM) on-board Chandrayaan-2 orbiter

The remote X-ray fluorescence spectroscopy is a powerful technique to investigate the elemental abundances in the atmosphere-less planetary bodies. The experiment involves measuring spectra of fluorescent X-rays from lunar surface using a low energy X-ray detector onboard an orbiting satellite. Since the flux of fluorescent X-ray lines critically depend on the flux and spectrum of the incident solar X-rays, it is essential to have simultaneous and accurate measurement of X-ray from both Moon and Sun. In the context of Moon, this technique has been employed since early days of space exploration to determine elemental composition of lunar surface. However, so far it has not been possible to exploit it to its full potential due to various reasons. Therefore it is planned to continue the remote X-ray fluorescence spectroscopy experiment on-board Chandrayaan-2 which includes both lunar X-ray observations and solar X-ray observations as two separate payloads. The lunar X-ray observations will be carried out by Chandra Large Area Soft x-ray Spectrometer (CLASS) experiment; whereas the solar X-ray observations will be carried out by a separate payload, Solar X-ray Monitor (XSM). Here we present the overall design of the XSM instrument, the present development status as well as preliminary results of the laboratory model testing. XSM instrument will have two packages namely – XSM sensor package and XSM electronics package. XSM will accurately measure spectrum of Solar X-rays in the energy range of 1–15 keV with energy resolution ∼200 eV @ 5.9 keV. This will be achieved by using state-of-the-art Silicon Drift Detector (SDD), which has a unique capability of maintaining high energy resolution at very high incident count rate expected from Solar X-rays. XSM onboard Chandrayaan-2 will be the first experiment to use such detector for Solar X-ray monitoring.     

特高压线路干扰下无线电罗盘测角误差分析

特高压输电线路的电晕放电是机场无方向信标台的主要干扰源之一。根据无线电罗盘的工作原理,在特高压输电线路电晕干扰条件下,通过理论推导得出了无线电罗盘测得的电台相对方位角误差。针对无方向信标台不同频率、台站与输电线路间不同的距离,对无线电罗盘受干扰影响产生的测角误差进行了仿真分析。研究表明：电晕放电干扰下,机载无线电罗盘测得的电台相对方位角误差随距离的增加而增大,随频率的增加而减小,且变化趋势由陡峭逐步趋近平稳。     

Gamma-ray detector on board lunar mission Chang’E-1

Gamma-ray spectrometer (GRS) is included in the payload of Chinese first lunar mission Chang’E-1 that will be launched in 2007. Specific objectives of the GRS are to map abundance of O, Si, Fe, Ti, U, Th, K, and perhaps, Mg, Al, and Ca to depths of about 20 cm. There are remarkable advantages for GRS application to remote sensing elemental materials over the entire lunar surface: large effective area and good ability for background rejection. We will describe the design of GRS and present its performance in this paper. Moreover, the GRS calibration will also be introduced.     

高LET值的获得及在SEB效应研究中的应用

在HI 13串列加速器上,为满足单粒子效应研究对更大的线性能量转移(LET)值的要求,发展了高剥离态离子的加速与引出技术,及0°束 Q3D磁谱仪焦面辐照方法。已得到的LET值为86 7MeV/mg/cm2(45°倾斜入射,在Si中射程R～20μm),束斑在Φ10到Φ50和注量率从几十到5×104·sec-1·cm-2之间可调。论文详述了这一特殊方法成功应用于MOSFET功率管的单离子烧毁效应实验。     

星间红外探测与测量系统

文章主要介绍了具有凝视成像功能的红外探测系统的研究和设计。首先简要描述了红外测 角系统的组成和工作原理;然后重点论述了红外探测系统的性能指标和光学设计;最后对红外探测系统设 计研究作了总结和展望。