The optical axis consistency index of an electro-optical device with side hanging structure of a sensor is out of tolerance. Through the analysis of the structure of the optical bench, sensor cover and other related parts of the electro-optical device, the flatness of the mating surface of optical bench, sensor cover and the sensor mounting surface of optical bench was optimized, the accuracy was improved, and the wall thickness was appropriately increased. The modal analysis of the optical bench before and after improvement was emphasized. The improved electro-optical device was verified and tested by building a test device, and the test data were analyzed. The test results show that the improvement measures are effective in improving the optical axis consistency of the electro-optical device.

A temperature adaptive anti-condensation device was presented to adapt the anti-condensation requirements of shipborne open-plan control cabinets in non-operating state under high temperature, high relative humidity and harsh environment. By analyzing working principle of the anti-condensation device and influence factors of the ambient temperature, the dew point temperature was determined. According to the energy transfer theory, the heat transfer coefficient of heating units, the effective heat dissipation area of radiators, and the Cubic Feet per Minute (CFM) parameters of axial flow fans were deduced and calculated. Then dual-redundant temperature control strategy was adopted to control the internal temperature adaptively in the open-plan control cabinet between 33 degrees C and 40 degrees C. Furthermore, to quantify the numerical model, temperature distribution of the finite-element analysis (FEA) and experiments were carried out, of which the results were compared with the analytic solutions. The results indicated that surface temperatures of the internal electronic devices in the open-plan control cabinet can be controlled no less than the dew point temperature of 33 degrees C with no condensations. In summary, an optimum temperature, dry and reliable working environment for electronic devices was built to prevent corrosion and damage effectively, as well as the stable performance of the open-plan control cabinet was consequently enhanced.

单台光电设备覆盖空域小、探测盲区大,对超低空飞行、隐身性强的目标探测概率低,光电组网能够扩展空域覆盖范围,提高目标探测概率.为获取最优光电组网方案,对其探测概率进行评估.给出基于目标运动模型的目标截获与数据获取仿真方法,采用基于最小一乘估计的自适应加权融合算法对目标数据融合处理.在单站目标探测概率基础上,建立多站目标探测概率的计算模型以及基于多站重叠覆盖区域的系统探测概率计算模型,提出光电组网系统对目标的探测概率评估方法.结合星型布站实例,对光电组网探测概率量化评估.评估结果表明:若单站探测概率≥80％,则组网探测概率≥89.4％;组网探测概率仿真评估能够为光电组网方案提供数据参考,支撑构建网络化光电探测系统.

为了实现舰载激光武器在复杂作战环境中对目标的精确毁伤,提出一种基于快速反射镜的粗精复合稳定平台,用以控制激光光束的稳定精度.首先,介绍了系统组成及工作原理,设计了压电陶瓷驱动的全柔性精级快速反射镜,并且分析了该快速反射镜的性能特点.然后,设计了粗精复合控制系统,在此基础上探讨了粗精复合稳定平台各组成单元之间的相互影响因素.最后,通过理论计算推导了粗精复合控制系统的误差传递函数,并搭建了实验平台,进行了稳定精度测试实验.实验结果表明:在四级海况摇摆扰动条件下,相较于传统粗级稳定平台,方位复合平台的稳定精度从191.6μrad提高到6.7μrad,提高了约27.6倍,俯仰复合平台的稳定精度从121.3 μrad提高到4.9μrad,提高了约23.8倍;在各种外界摇摆扰动下,粗精复合平台对激光光束的稳定控制精度均≤10 μrad.满足了舰载激光武器平台对激光光束高精度稳定控制的作战需求.

针对如何缩短防空导弹系统反应时间的问题,设计了一种MEMS（micro electro mechanical system,微机电系统）光开关阵列,用于控制防空导弹系统各分系统模块之间的信号传输。该光开关阵列由8组双层静电梳齿结构的光开关组成,每组光开关均控制一个防空导弹系统子模块的通断。根据拉格朗日-麦克斯韦方程,建立系统的机电动力学模型,确定质量、弹性系数、电容、气膜阻尼等主要参数。仿真结果表明:MEMS光开关的响应时间为0.627ms,稳态位移为4.724μm,最大位移为6.801μm,将相同阶段的反应时间缩短为原先的1/4。由此可以得出结论:MEMS光开关阵列不仅缩短了防空导弹系统的反应时间,而且保证了系统的稳定性。

In order to improve the operational performance of vehicle-mounted electro-optical system,the influence fac-tors and error sources of the system tracking accuracy are analyzed.Then according to the producing conditions of the error,the calculation formula of system error and random error are deduced.Taking a certain electro-optical system as an example,a method to improve the tracking accuracy and compensation was proposed through analysis and calcula-tion.The results show that the azimuth system error,the elevation system error and the random error of the system are 0.325 mrad,0.283 mrad and 0.276 mrad respectively,and the results are all less than 0.5 mrad,which meets the re-quirement of technical index.

In order to improve the environmental worthiness of the shipborne electro-optical sys-tem ,we analyzed the effect and hazard of the ship environment on the electro-optical system , conducted the research of environmental worthiness design ,and suggested reinforcing and pro-tecting all equipments .From the aspects such as material selection ,optical system design , structure design and three-proofing ,we gave some methods and measures for ameliorating the properties of anticorrosion ,resistant to temperature change ,shock and vibration .Through the experimentation and application in these years ,the results show that we improve the protection ability of the equipment by using the material of good corrosion resistance ,optimizing struc-ture ,and taking three-proofing measures ;we reduce the annexable temperature rise whose max-imum is 8 .1 ℃ in the sun and improve the work environment of the electro-optical sensors ;we ensure the infrared imaging quality because the maximum dispersion root-mean-square(RMS) radius is less than the pitch of the detector in -40 ℃ ~ +60 ℃ with the mechanical compensa-tion method ;we improve the radial rigidity more than 25 .9% and realize the work stabilization of the system by installing the thrust bearing .

采用基于密度泛函理论(DFT)的第一性原理对富镓中性GanAs(n=1～9)团簇的稳定性及缺陷特性进行了研究.结果表明,随着总原子数的增大,各基态团簇结合能的二阶差分值和团簇能隙差均呈奇偶交替变化规律,总原子数为奇数的团簇比总原子数为偶数的团簇稳定;部分团簇的能隙差小于砷化镓材料的禁带宽度,为砷化镓材料缺陷的研究提供了帮助,其中GaAs团簇缺陷中的VAsVGa缺陷导致能带中的T点处的带隙宽度减小,其最低施主缺陷能级位于导带底以下0.39eV,该值接近于EL6缺陷能级的实验值;团簇各基态结构的振动频率均在THz频段,从而为砷化镓材料的THz波辐射和缺陷的THz波检测提供了依据.

The stability and photoelectron spectroscopy of the Ga(n)As2(n=1-9) clusters have been studied by using first-principles based on density functional theory (DFT). Our calculations reveal that the stabilities of the Ga(n)As2(n=1-9) clusters tend to increase with the increase of the number of total atoms. The calculated second-order difference values of the binding energy show a certain law of even-odd alternation, and the value of the even-numbered clusters is much larger than those of the odd-numbered ones. The energy gap Egap also shows a certain law of even-odd alternation, i.e. the Egap of the even-numbered clusters is much larger than the odd-numbered ones. The Egap of the clusters is between 0.2 eV and 0.6 eV, it will provide a reference for GaAs defect level research. The Ga(n)As2(n=1-9) clusters are potential to detect and emit THz radiation due to their ground-state vibration frequency are in THz range.

The invention discloses a directional device of a photoelectric tracker installed on a naval gun bracket. The directional device comprises a fixed part, a rotary part, a plurality of bearings, a torque motor and a rotary transformer, wherein the fixed part comprises a directional base, an inner bearing base and a bearing transfer base; the rotary part comprises a directional shaft and a directional connection disc; the plurality of bearings are connected between the fixed part and the rotary part; the inner bearing base and the directional shaft are connected through an angular contact ball bearing and a deep groove ball bearing; the inner bearing base is installed in the directional base; the directional connection disc and the bearing transfer base are respectively and fixedly connected at the upper ends of the directional shaft and the directional base; and an outer supporting bearing with larger outside diameter is arranged between the directional connection disc and the bearing transfer base. The directional device disclosed by the invention is not only capable of shortening axial size and increasing transverse support rigidity and bending resistance capability of the photoelectric tracker but also capable of improving the capability of resisting swing, inclination and transverse punching vibration of the photoelectric tracker; meanwhile, the directional device has the characteristics of simple structure, small volume, light weight, high reliability and good control property; furthermore, the directional device can be popularized and used for other similar tracking equipment with a plurality of carriers or installation positions.

The design of optical window on a spherical shell in electro-optical systems is introduced. The comparison between conventional design and solid modeling by UG is made by an example of IR window. The former adopts the method of iterative trying,and the latter acquires the correct size and location of the optical window from UG solid modeling and space geometry transform,the latter is more visualized and theoretical sound. According to the optical features and engineering limitations,the installation of the optical window is determined.