捷联惯导陀螺仪冗余配置研究

为了有效提高提联惯导柬统的可靠性，对提联惯导陀螺仪冗余配置方案的束统优化进行了研究，介绍了冗余配置原则，结构方案对比与选择及相应的可靠性评估等内容。通过采用加权最小二乘法等数据处理方法，给出了计算结果。该结果表明，工程上捷联惯导陀螺仪冗余配置是应当而且能够实现系统最优化设计，选择教优配置结构。     

一种机载平台/弹载捷联惯导系统余度配置方法

文中介绍了一种以弹载捷联式子惯导为参考的平台/捷联故障检测技术,提出了利用主、子惯导系统中的6路加速度计信号进行余度配置的方案、逻辑及流程,该方案为机载主惯导系统的余度配置提供了一种有效途径.     

捷联式惯导系统在自行火炮上的应用

基于捷联式惯导系统的自行火炮火控系统结构简单、成本低、可靠性高,且可采用一次调炮,调炮速度快、直观、精度高,减少了火控系统反应时间。惯导系统的安装工艺简单、测量直接,减少了误差环节。与平台式惯导系统相比,捷联式惯导系统的尺寸和质量大为减少、可靠性高。随着计算技术的发展和捷联式系统用光纤陀螺和激光陀螺的性价比的提高,捷联式惯导系统在自行火炮火控系统中将越来越多的得到应用。     

激光陀螺仪的测试实验研究

对KM-11型的激光陀螺仪进行了性能参数的测试，用一种新的测试方法对表征激光陀螺性能的参数进行标定，给出了各个参数的值，为激光捷联惯导的工程应用提供参考。     

捷联式惯导系统及其软件可靠性的测试研究

文章分析了捷联式掼导系统的含义及其构成,介绍了捷联式掼导系统的软件系统的测试方法和可靠性分析方法,用这种方法,可以高效地对捷联惯导系统的软件系统进行测试.同时,选定了一种错误查出的指数类增长模型,对捷联惯导系统的软件可靠性进行了重点分析.     

激光陀螺与鱼雷捷联惯导

本文在给出惯性技术和惯导系统的有关概念的基础上，重点阐述了新型惯性器件激光陀螺的原理、性能及技术概况，提出激光陀螺捷联式惯导系统更适合于鱼雷武器，它是鱼雷惯导的优选方案。     

激光陀螺仪零偏稳定性研究

采用 CST 方法和最小二乘法对激光陀螺仪的零偏数据进行了处理和拟合,求出处理后数据中各噪声的误差系数,为激光陀螺仪在鱼雷捷联惯导中的应用奠定了基础。     

速率捷联惯导系统工具误差计算与补偿研究

针对采用惯性制导的弹道导弹,开展速率捷联惯导系统工具误差计算与补偿研究.给出速率捷联惯导系统的测量模型和工具误差模型,推导了加速度计和陀螺仪的工具误差补偿公式,并进行了仿真计算.根据仿真结果,分析了各工具误差系数偏差对导弹落点精度的影响,证明了补偿算法的有效性,为捷联惯导系统工具误差补偿和提高弹道导弹制导精度提供理论依据.     

有限状态机在捷联惯导系统软件设计中的应用

对有限状态机在捷联惯导系统中的应用作了比较全面的论述.首先,对有限状态机的数学模型进行介绍,然后分析了捷联惯导系统的一般组成和捷联惯导软件的特点.最后,详细介绍了有限状态机在捷联惯导系统软件设计中的应用.     

直瞄式近程旋转火箭弹的捷联惯导系统建模研究

捷联惯导系统通常应用于较远射程的导弹等飞行器上,近年来,随着惯性器件的微型化和低成本化,使其在近程小口径火箭武器上的应用成为可能.在近程武器上仍采用原有的捷联惯导解算方法则过于复杂,文中推导了在近射程、滚转体制条件下直瞄式火箭弹的捷联惯导基本方程,建立了相应的解算模型.在此基础上,以某型直瞄式反坦克火箭弹为例进行了仿真,验证了所建立的惯导方程及解算模型的正确性.     

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.     

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.