线导鱼雷模拟器的改进设计

为了满足作战训练需求,对某型线导鱼雷模拟器进行了改进设计.模拟器的设计基于复杂可编程逻辑器件(CPLD)和C++ Builder,采用“工控机+ISA总线+CPLD+上位机软件”结构.在分析了已列装的该型鱼雷模拟器所存在的缺陷基础上,提出了新型模拟器的功能需求以及总体设计方案,根据功能需求,从硬件和软件两方面对模拟器进行设计:硬件部分包括接口电路以及联接ISA总线和接口电路的桥接电路;软件部分采用C++ Builder进行开发,通过Win IO函数实现对底层硬件的驱动.改进后的模拟器在试用过程中取得了良好的效果,其主要技术性能达到了设计要求.     

三峡船闸编排调度的三维仿真支持

三峡船闸编排调度三维仿真系统是三峡船闸编排调度系统的一个子系统.该系统以openGL为开发平台,用3Dmax建立船只、船闸和背景的三维模型,并将其转化为OpenGL下的三维模型的方式以实现其控制和转换,通过OpenGL双缓存技术的swapbuffers()等函数完成其动画,并应用Visual C++6.0的MFC编程构造船闸编排调度三维仿真系统.     

激光脉冲编码发生器上位机软件实现

文中在讨论了激光脉冲编码发生器的系统构架、编码样式的基础上,提出一种软硬相结合的实现多种编码样式激光脉冲的方法,利用C++ Builder在Windows环境下实现了多样式激光脉冲编码发生器的软件控制,通过硬件测试结果证明该软件是行之有效的.     

调压开关弹性联轴器扭矩自动测试系统的设计

针对弹性联轴器扭矩测试的需要,采用研华PCL-818L数据采集卡建立了一套计算机扭矩自动测试系统.该系统的硬件由含有PCL-818L数据采集卡的测控计算机、高速直流伺服电机电枢电流模块、弹性联轴器扭矩模块、温度和励磁电流故障监视模块、及相应I/O、A/D、D/A等组成,软件系统包括测试、数据操作和打印等.同时介绍了所采用的C++ Builder 5.0工具,在编程环境下硬件中断和端口操作的实现.     

基于Labwin/CVI与C++ Builder的虚拟仪器设计

本虚拟仪器设计采用C Builder对Labwin／CVIDLL的动态链接，隐式连接用DLL的，lib实现，显式连接用C 的LoadlibraryO实现，传递数据双方声明全局变量共享，或在C Builder中声明并通过函数形式参数传递给Labwin／CVI，以调用Labwin／CVI的开发为例：Labwin／CVI在.h文件声明输出函数，在．c文件定义输出函数；C Builder毒调用模块在．h文件中声明调用函数，在．cpp文件中调用面板显示函数和采集数据。     

基于MATLAB与C#的火炮CAD系统开发和优化设计

MATLAB和C#语言都能把各自的源程序编译为. NET程序集,并支持对. NET程序集的调用,藉此可实现MATLAB和C#语言混合编程,弥补单一语言功能不足的缺点.在火炮CAD软件的开发中,用MATLAB语言编写火炮CAD模型计算程序并使用Builder for . NET工具编译为. NET程序集,然后利用C#语言编写软件界面,利用树形结构组织火炮的内弹道、炮口制退器和制退机等功能模块,各个模块相应调用由MATLAB生成的. NET程序集实现其功能,使用多线程预加载技术对程序进行优化以提高运行速度.     

破片参数测量系统的USB接口设计

为了实现破片参数测量系统中上、下位机之间的USB接口通信,文中提出了一种基于PDI USBD12芯片的USB接口开发方法。该方法利用KEIL C进行固件程序开发、利用WinDriver进行驱动程序开发、利用C++Builder进行应用程序开发。实践证明这种开发方法大大降低了开发难度,缩短了开发周期。该方法对于其他USB接口的开发具有较高的参考价值。     

基于知识规则的2.4 m 风洞控制开车参数自动生成专家系统

针对2.4 m风洞控制开车参数往往取决于人工经验、难以准确给定控制参数的问题,开发一种基于知识规则的控制开车参数自动生成专家系统.首先简要介绍了2.4 m风洞核心控制系统和专家系统的基本架构,然后详细介绍了开车参数自动生成专家系统的设计方法.采用C++Builder语言开发了一套软件,实现了2.4 m风动主要控制执行机构预置位置参数的自动生成.实际的应用结果表明:该系统具有适应能力强、覆盖范围广、可靠性高等特点.     

DI-720系列高速数据采集卡及其应用

DI-720系列高速数据采集卡具有与计算机接、采样位数多、支持多路输入并可人工设置等特点.所带有的波形记录分析软件(WWB)和程序开发包(SDK),使数据采集更灵活、方便.并以C++ Builder 5为开发语言,举例详细地说明了其在多通道故障信号采集中的应用,证实了该卡的灵活性和高性能等优点.     

卫星天线的指向控制与可视化仿真

文中对卫星天线指向控制的可视化仿真问题进行了研究.首先应用动量矩定理建立系统的动力学模型,并采用经典的PID控制,在SIMULINK 中进行了数字仿真.然后通过MATLAB接口接收SIMULINK控制模型传入的数据;在Visual C ++ 6.0 中应用OPENGL系统函数,调用卫星3DS模型完成整个可视化仿真.     

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.     

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 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.     

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.