空间光学遥感器光机结构材料应用情况及展望

介绍了空间光学遥感器的技术特点,综述了近年来空间光学遥感器光机结构材料的应用状况,对空间光学遥感器的光机结构材料发展趋势进行了展望。     

随遇接入卫星应急任务响应技术研究

面对在轨卫星当前对突发事件、灾难应急等突发性、短暂性的使用需求,传统空间系统应用存在任务规划提前制定、难以临时变更的缺点,卫星系统无法快速对该类突发事件进行资源保障.因此迫切需要构建高效、即时的空间任务执行体系.研究了随遇接入卫星应急任务响应技术,该技术可统筹任务执行过程中涉及的各条链路及各类资源,全面改善任务执行即时性.     

Experimental research of air-throttling ignition for a scramjet at Ma 6.5

An experimental investigation on ignition characteristics with air-throttling in an ethylene-fueled scramjet under flight Ma 6.5 conditions was conducted.The dynamic process of air-throttling ignition was explored systematically.The influences of throttling parameters,i.e.,throttling mass rate and duration,were investigated.When the throttling mass rate was 45% of the inflow mass rate,ambient ethylene could be ignited reliably.The delay time from ignition to throttling was about 45–55 ms.There was a threshold of throttling duration under a certain throttling mass rate.It was shorter than 100 ms when the throttling mass rate was 45%.While a 45%throttling mass rate would make the shock train propagate upstream to the isolator entry in about10–15 ms,four lower throttling mass rates were tested,including 30%,25%,20%,and 10%.All of these throttling mass rates could ignite ethylene.However,combustion performances varied with them.A higher throttling mass rate made more ethylene combust and produced higher wall pressure.Through these experiments,some aspects of the relationships between ignition,flame stabilization,combustion efficiency,and air-throttling parameters were brought to light.These results could also be a benchmark for CFD validation.     

基于职业能力培养的模拟电子技术课程教学改革实践

《模拟电子技术》课程是电子技术专业的一门核心主干课程,主要培养学生常用电子元器件的识别与检测,电子电路的分析、制作与测试等职业能力。通过对学生职业能力的培养,有力促进了教学模式、教学内容、教学方法、教学手段等诸多方面的改革,承载了职业院校的人才培养目标,取得了比较明显的教学成效。     

空间近程高速相对运动方程的状态转移矩阵

分析了空间近程高速相对运动的特点,建立了描述近程高速相对运动的线性微分方程组,并给出了状态转移矩阵与解析解。仿真结果表明:对于HEO-GEO近程高速相对运动,所建方程的相对距离计算误差仅为16 cm,不足Hill方程计算误差的15%。所给出的状态转移矩阵对于实现空间目标拦截等任务的实时高精度相对导航和制导算法具有一定的应用价值。     

月球主要构造特征：嫦娥一号月球影像初步研究

月球在31亿年前已基本停止地质活动,从而保留了其形成初期的信息．这些信息对于认识月球、地球乃至太阳系的形成演化具有重要意义．在已有研究成果的基础上,结合嫦娥一号探月卫星CCD影像数据,从月海穹窿、撞击坑、月岭、断裂、月坑链、月溪及月谷等方面介绍了月球主要构造形式的地质特征、形貌特征及遥感影像特征,对其成因以及所隐含的地质意义进行了分析．结果表明,嫦娥一号CCD影像信息丰富,影像清晰,利用其CCD影像数据进一步研究月球的构造现象是可行的．     

基于随机时延的弹射式干扰研究

针对传统噪声压制技术对合成孔径雷达形成有效干扰需要功率比较大的特点,研究了一种随机时延的弹射式干扰方法。该方法是在传统的弹射式干扰基础上,采用随机的干扰机转发时延。由于采用随机时延,方位向不同的回波时延不同而不能被压缩,干扰信号的距离向的压缩虽能成像,但已经是随机分布的。改进后的弹射式干扰能够覆盖整个成像区域,形成类噪...     

飞行器气动外形的正交设计与分析

结合飞行器总体快速设计需求,研究基于正交试验设计的气动外形分析方法。通过正交试验设计,获得飞行器气动特性数据,再根据试验结果的极差分析和方差分析,快速明确飞行器外形参数与阻力系数的影响程度,辨识关键参数,指导飞行器外形设计。以某飞行器为应用对象开展了实例验证,结果表明该方法能够快速获得满足要求的气动外形,提高分析效率,满足总体方案快速设计需求。     

氧化铝的直接电镀

讨论了在氧化铝基板上的厚膜应用领域中采取直接电镀的方法。研究了建立在钯涂层、碳涂层和导电聚合物基础上的三种直接电镀的方法，测定和比较了它们与传统电镀／ 化学镀技术的操作步序、电镀速度和膜层结合力等技术指标。     

STUDY OF FAST TRANSFER ALIGNMENT ON MOVING BASE

This paper holds that the key to improve the hitting rate of air-to-air missiles is to decrease the error of initial alignment of the inertial navigation system. Therefore, considering that the alignment should be completed within a specified short time, this paper presents the theory of transfer alignment and the computing way of accuracy in an air-to-air missile, where the platform inertial navigation system, or master INS, is adopted on aircraft, and the strap-down inertial navigation system, or slave INS, is used on missile. It emphasizes the idea of transfer alignment, that is, calibration of the slave INS is based on the master platform, and adopts a reasoning measure to deal with the installing-error-angle. And it is proved by simulation that the transfer alignment can be quickly achieved.