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1.
李伟  杨凯 《红外》2023,44(3):29-35
以“红土地”国产化导引头为例,详细介绍了动力陀螺式激光导引头的结构组成、工作流程和跟踪原理,并阐述了激光导引头数学模型及建模过程。针对其动力陀螺稳定平台特性,研究了其在火箭弹、空地导弹、航空炸弹等平台的应用。针对采用倾斜稳定三通道控制的非旋转弹提出的导引头输出斜率补偿算法,可有效降低导引头输出斜率散布;针对采用双通道控制的旋转弹提出的导引头转速自适应算法,在弹体转速0~10 r/s范围内实现了动力陀螺稳定平台式激光导引头的自适应工作。斜率补偿和转速自适应两种算法均已通过仿真试验考核以及地面联试与飞行试验验证,实现了工程应用。  相似文献   

2.
介绍了激光半主动导引头及其光学系统的结构和特点。依据半主动激光导引头的总体指标要求,分析、计算了折反式激光导引头光学系统的关键参数。进行了光学系统的结构选型,分析了激光导引头光学系统的像差和光斑要求,进行了光学系统设计。仿真结果表明,整个线性视场范围内,折反式激光导引头光学系统光斑直径稳定无变化,能量分布均匀一致;瞬时视场范围内,光斑直径稳定性优于2%。设计结果很好地满足了系统的设计要求,为激光半主动导引头的下一步研制奠定了良好基础。  相似文献   

3.
高重频固体激光器在光电对抗中的应用研究   总被引:19,自引:2,他引:17  
针对激光半主动制导武器导引头脉冲录取波门的技术特点,提出了应用LD泵浦的高重频固体激光器对激光制导武器进行高重频激光干扰的欺骗式干扰方案。分析了方案的技术原理,并对其主要技术指标进行了初步论证。  相似文献   

4.
简要介绍了激光制导原理,通过对高重频激光对激光半主动制导武器的干扰机理和激光导引头抗干扰措施的分析,提出了采用这种干扰方法应注意的一些实际问题。  相似文献   

5.
简单介绍了激光制导原理,通过对激光制导武器激光导引头抗干扰措施和高重频激光对激光半主动寻的制导武器干扰机理的分析,论述了高重频激光对激光半主动寻的制导武器进行干扰的2种实施方法.  相似文献   

6.
高重频激光对半主动激光制导导引头干扰机理分析   总被引:1,自引:0,他引:1  
简单介绍了激光制导原理,通过对激光制导武器激光导引头抗干扰措施和高重频激光对激光半主动寻的制导武器干扰机理的分析,提出了高重频激光对激光半主动寻的制导武器进行干扰的两种实施方法。  相似文献   

7.
激光制导导引头解码脉冲宽度的研究   总被引:3,自引:0,他引:3  
就激光半主动制导武器(激光导引头)接收系统的解码脉冲的宽度进行了理论研究,讨论了选取不同的解码脉冲宽度对激光导引头制导效果的影响.提出了为对抗角度欺骗式激光干扰和高重频有源激光干扰,导引头接收解码脉冲宽度必须正确设计的重要性。  相似文献   

8.
详细阐述了连续系统数字仿真程序包在CO2激光半主动导引头控制系统中的应用。该程序包适用于单变量。可以面向方程,也可以面向框图。程序结构采用模块式。  相似文献   

9.
CO2激光半主动导引头控制系统仿真   总被引:1,自引:0,他引:1       下载免费PDF全文
详细阐述了连续系统数字仿真程序包在CO2激光半主动导引头控制系统中的应用.该程序包适用于单变量.可以面向方程,也可以面向框图.程序结构采用模块式.  相似文献   

10.
激光导引头作为激光寻的制导武器的重要组成部分,是世界各军事强国不断研制与发展的对象。本文在介绍主动和半主动式激光导引头工作原理及特点的基础上,系统梳理了激光导引头若干关键技术的研究现状,指出了激光导引头将朝着抗干扰能力不断增强、多模复合、小型化、捷联式的方向发展。  相似文献   

11.
DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.  相似文献   

12.
This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel's.  相似文献   

13.
The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.  相似文献   

14.
Today, micro-system technology and the development of new MEMS (Micro-Electro-Mechanical Systems) are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.  相似文献   

15.
The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.  相似文献   

16.
From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.  相似文献   

17.
Waveguide multilayer optical card (WMOC) is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling & processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic (VB) language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.  相似文献   

18.
It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output(MIMO) communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.  相似文献   

19.
To meet the need of automatic image features extraction with high precision in visual inspection, a complete approach to automatic identification and sub-pixel center location for similar-ellipse feature is proposed. In the method, the feature area is identified automatically based on the edge attribute, and the sub-pixel center location is accomplished with the leastsquare algorithm. It shows that the method is valid, practical, and has high precision by experiment. Meanwhile this method can meet the need of instrumentation of visual inspection because of easy realization and without man-machine interaction.  相似文献   

20.
We have fabricated the white organic light-emitting devices (WOLEDs) based on 4,4' -bis(2,2 -diphenyl vinyl)-1,1' - biphenyl (DPVBi) and phosphorescence sensitized 5,6,11,12,-tetraphenylnaphthacene (rubrene). The device structure is ITO/2T-NATA (20 nm)/NPBX (20 nm)/CBP: x%Ir(ppy)3:0.5% rubrene (8 nm)/NPBX (5 nm)/DPVBi (30 nm)/Alq(30 nm)/LiF(0.5 nm)/A1. In the devices, DPVBi acts as a blue light-emitting layer, the rubrene is sensitized by a phosphorescent material, fac tris (2-phenylpyridine) iridium [Ir(ppy)3], acts as a yellow light-emitting layer, and N,N' -bis- (1-naphthyl)- N,N' -diphenyl -1, 1' -biphenyl-4,4' -diamine (NPBX) acts as a hole transporting and exciton blocker layer, respectively. When the concentration of Ir (PPY)3 is 6wt%, the maximum luminance is 24960 cd/m^2 at an applied voltage of 15 V, and the maximum luminous efficiency is 5.17 cd/A at an applied voltage of 8 V.  相似文献   

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