枪弹空间运动姿态存储测试系统

采用存储测试技术,针对转管武器发射时的特殊环境,设计枪弹空间运动姿态的测试系统.该测试系统体积小,功耗低,可以用电池供电,能在现场高速实时地记录枪弹在供输弹过程中的相关运动信息,并能够在系统掉电的情况下保持测试所得到的数据,以便于回收后准确地回放所记录的信息以供分析.     

外弹道加速度存储测试系统信息传输特性研究

针对外弹道加速度存储测试系统正确传输被测信息以及外界干扰对系统影响的问题,研究并计算了被测信息的时间熵、存储测试系统信道容量、系统抗干扰容限等参数及其相关关系.理论计算和实验结果表明,存储测试系统的信道容量大于被测信息的时间熵,存储测试系统能正确传输被测信号,同时给出了系统正常工作时所能承受的最大外界干扰.     

基于虚拟仪器的火炮动态测试技术

针对火炮结构复杂，待测参数较多的情况，有必要研制一种功能多、兼容性好、操作简便的测试系统。基于虚拟仪器的测试系统突破了传统检测手段在数据测量、处理方面的限制，使检测设备可以方便地通过软件升级实现功能扩展，有效地提高检测设备的检测技术水准。虚拟仪器由通用硬件平台和应用软件组成。其中基本硬件为NI公司的PCI-4472型动态信号采集卡，软件为NI公司的图形化编程语言Lab—VIEW。计算机为硬件平台的核心，I／O接口设备主要完成被测输入信号的采集、放大和模数转换。软件系统可以同时进行4通道测试并用图形分析显示出来。实弹测试实验表明，系统软硬件能够满足火炮动态参数测试要求。     

一种面向UUT的自动测试信息模型

根据大型复杂装备测试面，临的被测设备数量多，被测信号类型、测试需求多样的问题，建立面向UUT的自动测试信息模型，包括测试资源信息模型、测试项目信息模型和测试数据信息模型，将测试流程所需的UUT信息模型化，并在UUT、TPS、测试信息模型间建立一一对应关系，由此提高软件的模块化水平和可移植，并降低测试软件开发和维护的难度和成本。     

鱼雷发射装置内弹道参数测试

本文以光线记录测试系统的测量原理特点，传感器与记录光点的标定以及各待测参数之特征，系统地阐述了鱼雷发射装置内弹道参数的基本测试方法。尤其是对发射管膛压的测量，钱雷在发射管内运动速度、加速度的测量和如何正确选用记录振子的性能指标作了重点介绍。阐明了鱼雷发射装置内弹道待测参数、测试仪器和测试方法这三者的紧密关系。     

基准信息误差对传递对准的影响分析与补偿方法

针对延时引起的量测信息错误等问题，提出一种信息传递延时的估计与补偿方法。首先，分析基准信息对传递对准的影响，根据基准惯导时间延时的特点进行建模；其次，对包含时间延时条件下的传递对准观测方程进行推导，最后进行仿真测试。仿真结果表明：基准惯导延时时间能够被准确估计，该方法可以有效抑制由于主惯导信息测量延时而导致的滤波器发散现象，提高了传递对准精度。     

基于DCOM的网络化虚拟仪器测试系统

基于DCOM的网络化虚拟仪器测试系统由被测设备层、仪器层、网络通信层和客户层组成．其仪器模块与被测设备由网络传感器互连，局部测试网络由网桥与快速交换以太网相连．基于C Builder的测试服务器解释用户终端测试指令，控制仪器设备运行．用CVI开发的测试程亭以DLL的形式被服务器组件调用．CVI通过VISA或IVl仪器驱动器控制底层测试仪器．并以高压电源远程测试为例，给出了接口和访问代码．     

战车武器故障测试系统研究

以工控PC机为核心，设计一个综合测试系统，其电缆接口连接被测武器系统的测试电缆。炮控系统部件、自动装弹系统部件测试由PC机直接控制，导弹控制部件测试采用模块化设计，通过总线与各测控模块连接在一起，测试指令由PC工控机发出，单片机实施，测试结果在PC机上显示，PC机与工控机之间通过RS232串口通信。应用结果表明：该测试系统使用方便、简单可靠，能检测武器系统中的绝大部分故障。     

基于LXI技术的网络化军用ATS方案设计

为解决当前军用测试系统所面临的共性问题,即测试设备(ATE)与被测对象(UUT)之间距离较远就很难统一到一个测试系统中,文中以某型火控系统为例,采用基于LXI技术的网络化测试系统设计方案,并根据部队现状,对原有测试设备进行LXI改造,从而使ATE不再受到距离限制,提高了部队的快速保障能力.     

激光陀螺惯性组合综合性能自动测试系统的设计与实现

介绍了激光陀螺惯性组合综合性能自动测试系统的总体设计方案,并分别说明硬件和软件的具体实现方法。该测试系统通过与被测激光陀螺惯性组合在电气上的直接连接,能够自动完成激光陀螺惯性组合的测试和标定工作,并自动分析、处理数据。     

Stability of the Third Generation Intensifier under Illumination

The stability under illumination of transmission-mode GaAs photocathode sealed in the third generation intensifier is investigated by use of spectral response testing instruments. The variations of spectral response with the illumination times under weak and intense illumination are compared. The variations of photoemission performance parameters are also characterized. The results show that during initial several weak illuminations photocathode behaves no evident decay and a maximum sensitivity is achieved, while under intense illumination the sensitivity of photocathode begin to decrease largely at the first illumination. The calculated performance parameters show that the variation of surface escape probability with illumination times is a direct cause of instability of photocathode. It is also found that under intense illumination peak wavelength is moved towards short-wave and peak response is decreased, which shows that the ability of long-wave response of photocathode is decreased.     

Passive Acoustic Radar for Detecting Supersonic Cruise Missile

A Passive Acoustic Radar is presented as a necessary complement to electromagnetic wave radar, which will be expected to be an effective means for detecting cruise missiles. Acoustic characteristics of supersonic flying projectiles with diverse shapes are expounded via experiment. It is pointed out that simulation experiment could be implemented using bullet or shell instead of cruise missile. Based on theoretical analysis and experiment, the ““acoustic fingerprint““ character of cruise missile is illustrated to identify it in a strong noise environment. After establishing a locating mathematical model, the technique of acoustic embattling is utilized to resolve a problem of confirming the time of early-warning, considering the fact that velocity of sound is much slower than that of light. Thereby, a whole system of passive acoustic radar for detecting supersonic cruise missile is formed.     

Design and Analysis of Test Schemes of Static Postponing Time on Shrapnels Used to Riot Control

The test scheme of static postponing time given in our actual national military test standard on shrapnels used to control riot is a nine-point test scheme on the combined action of three kinds of temperatures and three kinds of pressures,the consumed ammunitions are more excessive. Statistic analysis and tentative checkout about a lot of test data are done,feasibility gists are put forward for optimizing of the test design scheme. The optimizing design and data analysis of test scheme of the item are done by managing uniformity design theory, two scientific and reasonable six-point test schemes are confirmed. The feasibility and reliability of the optimizing design schemes put forward above are proved ulteriorly by test validating. The gained schemes not only have good design uniformity and little ammunition wastage and meet the test demand, but also have better forecast ability for the result data of other points using the mathematic models from the actual test points.     

Super-resolution Restoration of Remote-sensing Images

A novel image restoration scheme, which is super-resolution image restoration algorithm Poisson-maximum-afterword-probability based on Markvo constraint （MPMAP） combined with evaluating image detail parameter D, has been proposed. The advantage of super-resolution algorithm MPMAP incorporated with parameter D lies in the fact that superresolution algorithm MPMAP model is discrete, which is in accordance with remote-sensing imaging model, and the algorithm MPMAP is proved applicable to linear and non-linear imaging models with a unique solution when noise is not severe. According to simulation experiments for practical images, super-resolution algorithm MPMAP can retain image details better than most of traditional restoration methods; at the same time, the proposed parameter D can help to identify real point spread function （PSF） value of degradation process. Processing result of practical remote-sensing images by MPMAP combined with parameter D are given, it illustrates that MPMAP restoration scheme combined PSF estimation has a better restoration result than that of Photoshop processing, based on the same original images. It is proved that the proposed scheme is helpful to offset the lack of resolution of the original remote-sensing images and has its extensive application foreground.     

Design and Simulation of TF and TA Controller for Missile

A nonlinear terrain following(TF) and terrain avoidance(TA) controller is proposed for missile control systems. Based on classical TF algorithm (adaptive angle method), a new method for TF controller is proposed by using angle of attack. A method of obtaining terrain outline data from digital elevation map (DEM) for TF control is discussed in order to save store space. A TA algorithm is proposed by using bank-to-turn technique. The block control model, which is suitable for backstepping design, is given for nonlinear model of missile. Making full use of the characteristics of the system and combining block control principle and backstepping technique, a robust controller design method is proposed. Uncertainties in every sub-block are allowed, and can be canceled by using the idea of nonlinear damping. It is proved that the state tracking errors are converged to a neighborhood of the origin exponentially. Finally, nonlinear six-degree-of-freedom simulation results for the missile model are presented to demonstrate the effectiveness of the proposed control law.     

Design of Non-fragile Satisfactory Estimator for Linear Continuous Perturbed Stochastic Systems

The design problem of non-fragile estimator is addressed for a class of perturbed linear continuous systems. The perturbations occur on the plant and estimator parameters. The estimator designed should force the error system to achieve the desired decay rate and force the steady error variance less than the specified upper bound irrdevancy of the admissible plant perturbations and estimator perturbations. Consistency problem of the decay rate with the variance upper bound is first considered via linear matrix inequality （LMI） approach. The solution of the estimator parameter under specifications to be consistent is then discussed. The consistency condition of specifications and estimator parameter solution are transformed to feasible or minimum problems subject to a set of LMI respectively. The method is illustrated by a numerical example.     

An Improved Scene-based Nonuniformity Correction Algorithm for Infrared Focal Plane Arrays Using Neural Networks

The improved scene-based adaptive nonuniformity correction （NUC） algorithms using a neural network （NNT） approach for infrared image sequences are presented and analyzed. The retlna-like neural networks using steepest descent model was the first proposed infrared focal plane arrays （IRFPA） nonuniformity compensation method, which can perform parameter estimation of the sensors over time on a frame by frame basis. To increase the strength and the robustness of the NNT algorithm and to avoid the presence of ghosting artifacts, some optimization techniques, including momentum term, regularization factor and adaptive learning rate, were executed in the parameter learning process. In this paper, the local median filtering result of Xij （ n ） is proposed as an alternative value of desired network output of neuron Xij （ n ）, denoted as Tij （ n ）, which is the local spatial average of Xij （ n ） in traditional NNT methods. Noticeably, the NUC algorithm is inter-frame adaptive in nature and does not rely on any statistical assumptions on the scene data in the image sequence. Applications of this algorithm to the simulated video sequences and real infrared data taken with PV320 show that the correction results of image sequence are better than that of using original NNT approach, especially for the short-time image sequences （several hundred frames） subjected to the dense impulse noises with a number of dead or saturated pixels.     

Piecewise Filter of Infrared Image Based on Moment Theory

The disadvantages of IR images mostly include high noise, blurry edge and so on. The characteristics make the existent smoothing methods ineffective in preserving edge, To solve this problem, a piecewise moment filter （PMF） is put forward. By using moment and piecewise linear theory, the filter can preserve edge. Based on the statistical model of random noise, a related-coefficient method is presented to estimate the variance of noise. The edge region and model are then detected by the estimated variance. The expectation of first-order derivatives is used in getting the reliable offset of edge. At last, a fast moment filter of double-stair edge model is used to gain the piecewise smoothing results and reduce the calculation. The experimental result shows that the new method has a better capability than other methods in suppressing noise and preserving edge.     

Bistatic Sonar Localization Based on Best Linear Unbiased Estimation

A best linear unbiased estimation （BLUE） algorithm for bistatic sonar localization is proposed. The Cramer-Rao bound for bistatic Sonar and the geometrical dilution of precision （GDOP） in different conditions are given. The simulation results show that the location accuracy of BLUE algorithm is higher than the weighted least square method.     

Research on Gear-broken Fault Diagnosis in a Tank Gearbox

A fault diagnosis method of working position gear in a tank gearbox is put forward based on simulating the fault of working position gear in an actual tank, extracting the envelope of vibration signal by Hilbert transformation amplitude demodulation method, and zooming the low-frequency band to envelope signal.