基于纯测角的直升机飞行轨迹与拦截角估计

文中针对智能雷弹对高速运动目标声定位存在一定角滞后的缺陷．开展了雷弹对目标的飞行轨迹的估计以及对飞行模型中的系数的递推算法，进而对单自由度和双自由度雷弹的拦截方位进行了预测。     

集束箭形弹反直升机作战毁伤概率研究

为了分析集束箭形弹反直升机作战的有效性,文中通过建立毁伤概率分析模型,计算了集束箭形弹对抗直升机的毁伤概率。结果表明,在一定的射程上,由一定数量的集束箭形弹组成的火力单元对直升机具有较高的毁伤概率,从而使得集束箭形弹成为了一种有效的反直升机武器;更进一步地,通过对比分析不同子箭飞行距离下的用弹量,提出了优化武器系统作战效费比的方法和途径。     

反直升机雷弹声探测系统设计

反直升机雷弹声探测系统,文中对声探测阵列的结构进行了优化,论证、计算,并确定出合适的孔径范围,设计了能够实现定距误差小于１０％和识别率大于９５％所采用的硬件结构,并对硬件的工作原理,时序进行了分析,完成了目标定位和识别的系统软件流程图,利用该系统的雷弹可实现对直升一位攻击。     

超低空靶弹弹道设计

根据对某型超低空靶弹弹道的要求，对该靶弹的飞行弹道进行了设计计算，特别是讨论了不同发射角，以及不同弹道过载对飞行弹道的影响，指出了靶弹弹道设计中应注意的问题。     

雷弹射击效力的研究

雷弹是一种对付装甲目标群的新弹种,具有雷和弹的双重性能.用火炮或火箭炮发射雷弹时,评定其射击效力的方法目前是用计算机模拟,该文通过分析和推导,得出了评定雷弹射击效力的解析式.     

利用声多普勒信息估计目标运动参数

为了研制反武装直升机被动声探测智能雷弹引信的需要，本文利用直升机声信号的多普勒频移方程，采用最小二乘曲线拟合，估计直升机目标的运动参数。仿真结果验证了该方法的有效性。     

超低空靶弹弹道设计

根据对某型超低空靶弹弹道的要求,对该靶弹的飞行弹道进行了设计计算,特别是讨论了不同发射角,以及不同弹道过载对飞行弹道的影响,指出了靶弹弹道设计中应注意的问题.     

双谱峰值特征在智能雷弹系统目标识别中的应用

以反坦克、反直升机智能雷弹系统为背景,研究特征提取及目标识别的有关方法和途径。频谱和自相关谱峰值结构特征提取,在战场声目标模糊模式识别中,特别是在组合特征优选中,占有５０％的比重。且不少谱峰值特征已获得较好的单项识别效果。     

直接力/气动力复合控制拦截弹的飞行控制系统设计

推导了气动力与力矩式直接力复合控制拦截弹弹体的数学模型，用气动力控制与直接力控制并行的方式初步设计了拦截弹的飞行控制系统．最后推导出复合控制拦截弹的飞行控制系统的传递函数，并分析了拦截弹分别采用复合控制和空气动力控制时的飞行控制系统时间常数。在此基础上进行拦截弹末制导精度的仿真．验证了复合控制方式比气动力控制更为有效。     

红外干扰弹的作战使用效能评估

文中首先根据火控系统以及武器配置特点,给出一种用于评估武装直升机使用红外干扰弹抑制敌方红外导引头导弹的效能评估方法.然后结合具体算例分析,计算和确定为保障对武装直升机的防护概率不低于给定的概率所需要的红外干扰弹数量及其发射方式.     

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.