基于CPLD的电子安全系统接口电路设计

针对某导弹引信的应用背景，采用CPLD技术(复杂型可编程逻辑器件)设计引信电子安全系统的接口电路。它能较好解决该引信安全系统的体积小、成本低的问题，而且具有抗干扰能力强的特点。     

小口径炮弹半主动式激光近炸引信信号处理技术

为了解决小口径炮弹半主动式激光近炸引信在复杂环境中正确探测和识别目标的问题,研究了该引信的信号处理技术.运用模数混合的方法分析了系统信号预处理电路和数字信号处理电路设计方案.数字信号处理电路以单片微处理器为核心,体积小、功耗少、成本低.设计的信号处理系统较好地满足了小口径炮弹半主动式激光近炸引信的要求.     

一种高性能雷达引信FDSPS及其实时性和可编程性分析

介绍了一种新型雷达引信频域数字信号处理系统的硬件结构设计和工作原理,举例分析了该系统采用专用FFT,调整DSP,PLD和双端口PAM器件,及合理的电路结构布局所获得的通用性,实时性,可编程性和可重构性,描述了“数字化接收机”和“软件无线电”概念及其相关技术在数字化雷达引信中的具体应用。     

基于软件无线电技术的数字化引信研究

介绍了一种基于软件无线电技术体系结构设计的全数字化引信。在脉冲多普勒数字化引信的基础上,详细设计了可编程脉冲发生器、数字化接收机和数字信号处理机。该数字化引信具有通用性和可扩展性的特点,提高了无线电引信的自适应能力和智能化水平。     

基于CPLD的脉冲激光引信信号处理系统

文中设计了一种硬件组成简单,所有算法均由一片ＣＰＬＤ（复杂型可编程逻辑器件）完成的新型脉冲激光引信信息处理系统。它能较好地提高激光引信的抗云雾干扰性能、改善引战配合效率,非常适合于小弹径的空空导弹。     

一种新型激光引信信号处理系统

设计了一种硬件组成简单、所有算法均由一片ＣＰＬＤ（复杂型可编程逻辑器件）完成的新型脉冲激光引信信息处理系统。它能较好地提高激光引信的抗云雾干扰性能,改善引战配合效率,非常适用于小弹径的空空导弹。     

窄脉冲调制的无线电引信信息实时快速处理系统设计

引信信息处理系统直接决定目标能否被探测识别、引信是否具有抗干扰能力和最佳自适应炸点等，本文设计了一个窄脉冲调制的无线电引信信息实时速处理系统。它主要由视频相关器，高速Ａ／Ｄ电路、ＴＭＳ３２０Ｃ５０信息处理板、快速硬件数字滤波器，ＦＦＴ电路组成。     

GPS弹道修正引信软件化设计

根据引信软件化的概念,基于DSP的可编程快速数字信号处理功能,利用GPS的快速空间三维定位信息,进行了GPS弹道修正引信的弹道解算、电子安全系统的软件化设计,满足新一代引信的发展方向。     

可重构硬件技术在引信设计中应用探讨

针对现代引信小型化、智能化、通用化的发展要求及引信的工作特点，通过基于VHDL的可编程逻辑控制器，采用可重构硬件的设计思想，探讨了引信“硬件软化”设计技术及可行性。为解决在现代战争环境中引信为了满足高可靠性、多用途，多功能、抗恶劣环境，抗电磁干扰的要求，而使得信息处理和信息控制电路越来越复杂，同时又要求引信电路能够实现快速．实时处理信息的问题提供了新的途径。     

基于混沌电路的一种混合噪声调制雷达引信

提出了一种基于混沌电路的随机脉位调制（RPPM）和随机二相码调相（RBCPM）混合调制的雷达引信系统。介绍了该引信波形的数学模型，平均模型函数及引信的实现框图和工作原理，研究了基于混沌电路的混合调制信号的产生方法，这种引信波形不仅具有结构简单和易于处理等特点，而且具有良好的测距和测速性能，以及极低的截获概率和很强的抗干扰特性。     

Nitrosation and Nitration of Tetraacetyldibenzylhexaazaisowurtzitane

Tetraacetyldibenzylhitane (TADBIW) was subjected to debenzylation by nitrosating with inorganic materials available commercially to synthesize tetraacetyldinitrosohexaazaisowurtzitane (TADNSIW). TADNSIW was purified, and its structure was determined by FTIR, 1H NMR, MS and element analysis. The debenzylation reaction of TADBIW gave quantitative benzaldehyde as a by-product. This indicates that the reaction produces an imine cation as an intermediate. Hexanitrohexaazaisowurtzitane (HNIW) was prepared from unpurified TADNSIW with the yield over 96.0 % and the purity more than 98.0 %. And the mechanism of the reaction from TADNSIW to HNIW is proposed to be oxidation of nitroso and nitration of acetyl on the molecule of TADNSIW, This reaction system involved is simple, and the reaction can complete within a short time and under mild conditions. The product can be easily to separate and the waste disposed readily.     

A Robust Algorithm for Watermarking 2D Vector Maps with Low Shape-Distortions

The technique of watermarking has been introduced into 2D vector maps for many potential applications such as protecting the copyright of important GIS （geographical information system） data and tracing the data source of military maps. In most previous works, although the validity of the map data could be preserved during the embedding procedure, the shape-distortions of the map elements are usually neglected which would tend to degrade the invisibility of the watermarking schemes. A shape-preserving algorithm for watermarking 2D vector maps is presented in this paper. A 1D distance sequence extracted from the original map is adopted as the cover data instead of 2D coordinates. A watermark bit is represented by changing the distributions of the cover data. The embedding procedure induces lower shape-distortions than in former works. Experimental results indicate better invisibility of the proposed scheme, as well as its robustness to certain attacks such as map simplification, interpolation, additive noise and most geometric transforms.     

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.     

Open Rule-setting System Applied to Conceptual Design of Engines

Open rule-setting method advanced in this paper concentrates on providing designers of engines with a convenient way to express their design innovations and develop the expected prototypes in the early CAD stage, and constitute effective models for the following analysis process of CAE and CAPP. The problems arisen in the process of conceptual design with the traditional experience-based development method are analyzed. Based on those analyses, open rule-setting method is presented and some associated technical problems are discussed. The functional framework of open rule-setting system was built as software engineering methods. The speciality of the engine product as a kind of complex product and the requirement of the engine product based on its structural particularity to rule-setting system are considered carefully. A demonstration is supplied to illustrate how the open rule-setting method enhances the efficiency and quality of the engine conceptual design.     

Research on Linux Network Device Driver

By analyzing the working principle of Linux network device driver, discussing the Linux network driver structure and its key technologies, the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull, c and improving the COW technology, the Zero-Copy technology in Linux （kernel version 2.6.11 ） is implemented. In the end, the success test tells us that the thorough analysis of network device driver is the foundation of many applications, and it also provides a certain improvement to a lot of real applications, even to military application development.     

Improvement and Experiment of the Reamer in Vibra Cutter Against Wave Edge of Titanium Sheet Alloy Parts

By analyzing the influencing factors of part quality making of sheet alloy of titanium by vibra cutter, the shape of upper reamer is set as cylinder and wedge-shaped form, and the lower reamer as plain and hemicycle form, and its main structural parameters are defined as well. Then it is validated further that such improved vibra cutter reamer can be used to process curve-edged parts of titanium alloy sheet. The experimental result shows that the titanium alloy sheet parts processed by above equipment have no sharpen angles for convex parts and evident crevasse of concave-edged part. In summary, such improvement can eliminate the free-waved edge and improve the manufacture quality of titanium alloy sheet parts greatly.     

Experimental Study on the Small Flyer Initiating Behavior of Fine-grained Explosives

The initiating behavior of fine-grained explosives by small flyer is studied. The diameter of small flyer in this device is 1 ram. The test results indicate that the granularity of explosives has great effect on its flyer initiating sensitivity.The flyer initiating sensitivity of the fine-grained explosives is higher and the critical initiating energy is lower than that of common explosives. For common explosive, the flyer initiating sensitivity increases as the density is reduced. But for the fine-grained explosive, the test results are exactly opposite.     

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.     

Algorithm for Multi-laser-target Tracking Based on Clustering Fusion

Multi-laser-target tracking is an important subject in the field of signal processing of laser warners. A clustering method is applied to the measurement of laser warner, and the space-time fusion for measurements in the same cluster is accomplished. Real-time tracking of multi-laser-target and real-time picking of multi-laser-signal are introduced using data fusion of the measurements. A prototype device of the algorithm is built up. The results of experiments show that the algorithm is very effective.     

Robust Graded Sliding Mode Tracking Control for Low Speed Spinning Ballistic Missiles

The nonlinear dynamic model of spinning ballistic missiles is established during the first boosting phase of the missile. Based on the conventional backstepping sliding mode control and the assumption of a two time-scale separation of missile dynamics, a graded sliding mode controller is designed with two sub-sliding surfaces which have invariability to external disturbances and parameter perturbations, and a matrix which comprises three first order low pass filters is introduced to prevent ＂explosion of terms＂. Owing to the upper bounds of the uncertainties are difficult to obtain in advance, adaptive laws are introduced to estimate the values of the uncertainties in real-time. Eventually, the numerical simulation results given to show the proposed controller can ensure the steady flight of missiles.