基于DSP/BIOS的空空导弹飞控软件仿真

飞控软件已成为先进数字化空空导弹研制的关键,如何对嵌入式飞控软件进行验证是空空导弹研制的焦点。DSP实时操作系统BIOS及其实时数据交换(RTDX)技术的发展,为空空导弹飞行控制系统软件的动态仿真提供平台支持。本文结合基于DSP/BIOS的空空导弹飞控软件仿真系统的开发,论述其关键技术及其应用,进行飞控软件动态仿真,给出仿真结果。实践表明,该系统的应用可以缩短设计周期,保证飞控软件设计的质量与可靠性。     

基于TEAMS软件的空空导弹测试性建模方法

基于空空导弹测试性建模目前没有一个详细、规范的方法,文中结合空空导弹特点,对多信号流图模型概念进行了补充和改进,提出了基于TEAMS软件的适合于空空导弹测试性建模方法,并在某型空空导弹伺服系统上开展实例应用,验证了该建模方法的可行性和有效性。     

空空导弹弹载制导控制系统软件的关键技术研究

数字复合制导控制系统是现代超视距空空导弹的核心,随着先进的嵌入式数字计算机在空空导弹武器系统中的应用,如何高效率、高质量、高可靠性实现这些复杂的系统控制算法成为影响武器系统效能发挥的重要因素,本文提出了空空导弹嵌入式制导控制系统软件的关键技术,结合某制导软件的应用实例对软件实现工程方法、调度时序分析、合格性验证技术和技术状态管理等进行了探讨。     

可互操作ATS软件体系结构及其实现技术研究

在深入分析ATS可互操作性影响因素的基础上,给出了可互操作ATS软件体系结构,通过严格定义各层的信息模型、接口模型来保证各层的互操作性,实现系统的互操作.重点对软件结构中基于STD的运行时系统进行了建模分析,研究了STD与面向对象的接口、测试行为的实现、测试引擎的运行机制等关键技术和实现方法.通过上述研究,成功解决了测试程序运行层的互操作性问题.     

一类空空导弹习行控制系统的计算机辅助设计技术

本文讨论了一类空空导弹飞行控制系统的计算机辅助设计技术。在利用根轨 法对自动驾驶仪的结构进行修改后，用参数空间方法进行控制器的设计。利用MATLAB语言的用户图形界面设计工具，开发了习行控制系统的计算机辅助设计软件包，该软件充分利用了用户图形界面的优点，开发的界面友好，操作简单,易于用户重复开发，最后给出了设计实例。     

一种弹载软件设计方法及其开发环境原型

面向未来多目标、超远距的空空导弹发展需求,基于多处理器的分布式并行处理系统及其开发环境是弹载软件发展的方向。在保证系统可靠性、可移植性以及实时性的前提下,为提高软件开发效率、降低开发成本,对弹载软件系统的设计与开发方法有了更高的要求。本文基于新型航空嵌入式实时系统体系结构描述语言标准AADL,提出针对的弹载软件设计与分析的方法和基于实时中间件的方法,设计了面向用户的弹载软件开发支持环境的原型系统,从而可支持形成一体化的弹载软件设计、分析与开发框架。     

炮位侦察校射雷达系统仿真建模

为了更有效地进行炮位侦察校射雷达的仿真,规范化的建模方法是高质量、高效率开发的技术基础.利用UML面向对象的方法对系统进行需求分析,运用Rational Rose软件对该系统模型进行了可视化软件建模,从功能模块图、用例图、静态模型和动态模型等方面对系统进行了分析,实现了系统开发的规范化和系统化.     

浅谈自动测试系统的发展与不足

随着现代科学技术的发展,为了适应现代战争的需要,具有通用化、小型化、智能化等特点的自动测试系统应运而生。介绍了ATS的发展概况,并对ATS的标准化、TPS开发和故障诊断等关键技术进行了论述。概述了美军ATS的典型应用情况,并指出了ATS在发展过程中存在的不足。     

空空导弹电磁干扰模拟系统的研究

建立了空空导弹电磁干扰模拟系统,介绍了系统的框架和信号流程。电磁干扰模拟系统可以在试验室模拟空空导弹在外场试验及使用过程中可能遇到的电磁干扰,检验空空导弹针对特定电磁干扰的抗干扰能力。     

面向信号的空空导弹ATS软件平台设计

首先介绍了面向信号测试程序的优点及开发面向信号测试程序所使用的通用测试语言-ATLAS语言的的特点,最后提出了空空导弹面向信号测试软件平台框架模型与设计方案和其中的关键技术.     

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.     

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.     

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.     

Influence of Installing Error on the Surface Shape Precision of the Axial Symmetry Aspheric Workpiece in Lapping

A method to calculate the surface shape error, which is caused by the installing error between the workpiece and the lapping tool in the process of form lapping, is proposed. The mathematical model which the installing translation error influences on the workpiece surface shape error is established. The changing rule of the error is simulated through the calculating example of the paraboloid workpiece. The results indicate that the surface shape error of the workpiece is increasing with the increase of the installing translation error, it is also increasing gradually along the center point of the curve surface to the edge, and the influence is severer to the curve surface with great curvature than that of the small curvature when the translation error is the same.     

Experimental Research on Output Performances of Giant Magnetostrictive Actuator

The paper introduces the performances of magnetostrictive actuators and its applications, discusses the design methods for the structure and internal magnetic circuit of a giant magnetostrictive actuator, and makes tests on the output displacement and force characteristics for an actuator using homemade magnetostrictive material. The experimental result shows that the actuator has satisfactory output precisions and ranges in transient and stable states, and can be used in lowfrequency vibration control system of precise equipment.     

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.