神经网络在鱼雷交流电机转矩辨识中的应用

针对采用传统转矩控制方法不能建立精确的数学模型，而难以满足系统性能要求，为提高鱼雷异步电机在线参数识别的效率和可靠性，提出了一种基于BP神经网络的鱼雷交流电机转矩辨识方法。通过假设推算出电机转矩表达式，利用基于BP神经网络进行转矩辨识，该方法不需要辨识对象的数学模型，只需对神经网络进行在线或离线训练，利用训练结果便可进行辨识系统设计。仿真结果表明，该辨识方法能够取得较好的辨识精度。     

三速制鱼雷自适应滑模控制研究

针对三速制鱼雷在不同速度下运动特性的变化对控制系统自适应性和鲁棒性的要求,提出一种自适应滑模控制策略。将纵向运动控制分为俯仰角控制和深度控制内外2个回路。深度控制回路采用自适应算法在线估计无法测量的攻角,俯仰角控制回路采用自适应滑模控制。在线估计不确定模型参数,并克服模型中的未建模不确定性,从而保证了三速制鱼雷在速度变化和模型参数不确定条件下的稳定性,消除了由于非零平衡态造成的深度稳态误差。仿真对比研究结果证明了该自适应滑模控制方法的有效性。     

链式炮PMSM 电机转速自适应反演控制

链式炮外能源电机转速稳定性对其射速影响很大。提出交流永磁同步电机（permanentmagnetsynchronousmotor,PMSM）的变参自适应反演速度稳定控制器设计方案,采用实时在线的自适应参数估计和反演控制相结合的方法,通过设计恰当的输入控制律,并对定子电阻、转动惯量、摩擦系数、负载转矩等参数按照设计的自适应估计律在线估计。试验结果表明：该控制策略能有效地抑制多参数摄动和负载扰动对转速的影响,可以作为一种较好的鲁棒方法在链炮伺服电机控制中采用。     

鱼雷PMBLDCM在线智能PID控制器建模与仿真

针对应用于新型鱼雷武器中的永磁无刷直流电机（PMBLDCM）转矩脉动较大引起的噪声和振动等问题,设计了离线训练与在线训练相结合的智能比例积分微分（PID）控制器。首先,通过分析被控对象负载扰动大的特点,利用人工神经网络建立了自校正调节器,将其与传统的PID控制器相结合,通过在线调节PID参数以达到最优的控制效果;其次,在Simulink中搭建了在线智能PID控制系统模型并进行了仿真试验。仿真结果表明,在线智能PID控制器具有较好的适应性和鲁棒性,系统具有良好的动态响应性能。     

基于扩张状态观测器的反鱼雷鱼雷迎面拦截制导律

基于雷目相对运动方程,把迎面拦截问题描述成具有终端角约束的最优控制问题,针对鱼雷自导头难以测量视线角速率的难题,提出了一种基于扩张状态观测器的目标视线角速率实时在线估计方法,同时估计出目标机动引起的不确定干扰量,并基于线性化的侧向运动方程求解出反鱼雷鱼雷舵角控制指令,从而实现了含有干扰补偿的迎面拦截最优制导律。仿真结果表明,与传统的比例导引律相比,该最优制导律具有很好的迎面拦截效果。     

变速鱼雷推进器动态模型理论研究

传统鱼雷推进器静态模型已无法满足变速鱼雷的建模需要，为了解决这一问题，在国内外学者研究的基础上，运用流体动力学方法，建立了鱼雷推进器比较精确的动态模型。该模型是以推进器来流速度和螺旋桨转速为状态变量，以电机施加转矩为输入，螺旋桨推力和转矩为输出的。     

数据融合技术在鱼雷制导系统中的应用

文中着重于数据融合技术的研究和卡尔曼滤波理论的应用.利用鱼雷纵向和侧向运动方程分别建立其对应的非线性系统的滤波方程和滤波算法,分别估计出相应的鱼雷速度,同时将利用加速度计模型估计出来的鱼雷速度进行多组数据融合,能得到更精确的鱼雷速度.文中提出了一种实时估计鱼雷速度的数据融合技术和算法,通过仿真计算,证明文中提出的方法对于鱼雷速度的估计具有方法简单、估计精度高的特点.     

基于排气温度动态模型的在线观测器研究

排气温度传感器作为柴油机排放控制和状态监测的重要部件,广泛应用于柴油机电子控制领域。为满足二级增压中低压级涡轮后排气温度传感器在线故障诊断与容错控制的需要,以某特定型号发动机为例,建立排气温度动态模型来反映缸内燃烧状况,利用空燃比、转速和海拔高度对排气温度因子进行虚拟标定;构建包含1阶滞后环节的排气温度在线观测器,并针对典型工况对观测器有效性进行稳态和动态验证。研究结果表明：基于排气温度动态模型的在线观测器可实现涡后排气温度的在线估计,稳态精度达到±3%以内,动态精度达到±8%以内,响应时间小于3 s;所 构建在线观测器具有良好的计算精度和动态响应性能。     

反鱼雷鱼雷自适应滑模导引律

针对在目标机动性加大的情况下常规鱼雷导引方法不能满足反鱼雷鱼雷迎面拦截来袭鱼雷需求的问题,为提高反鱼雷鱼雷拦截概率,提出了利用滑模观测/微分器对来袭鱼雷视线角速率进行估计的方法,基于李雅普诺夫稳定性理论,根据准平行接近的原理,推导出一种自适应滑模导引律。将该方法运用于反鱼雷鱼雷跟踪拦截,仿真结果表明,该导引律对干扰和参数摄动具有强鲁棒性,与传统比例导引法相比,其对机动目标的导引精度高,脱靶量小,可以满足反鱼雷战技术的需求。     

鱼雷深度弹道的自适应反演鲁棒控制

为研究鱼雷深度弹道的非线性控制方法,在深度非线性模型中,以鱼雷姿态角速度作为升降速度的虚拟控制量,得到新的输入输出动态和稳定的零动态.改写输入输出动态为严反馈形式,针对模型中各级未知参数向量,分别设计自适应调节律.引入非线性阻尼项消除不确定性,使跟踪误差收敛到零的小邻域内.仿真表明,各级预设参数自适应调整,鱼雷的深度弹道控制性能良好.给出的自适应反演鲁棒控制律能够处理模型不确定性和各级未知参数,深度非线性分层控制策略体现了鱼雷的非线性特征.     

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.     

Method for Measuring Velocity of Warhead Fragments Based on Photoelectric Detection

For measuring velocity and impacting position of single fragment of warhead, a non-contact measuring method is proposed, in which a six-light-screen array, a position indicator, a multi-channel chronograph and a computer are used.The principle of measurement is described. The key device of the system is a light screen array sensor which consists of six light screens allocated with certain geometrical parameters. When the fragment flies through the light screen array, the time of passing through each of the screens is recorded by the multi-channel chronograph. According to the time data and the geometrical parameters of the array, the velocity vector and the location of the fragment can be calculated immediately. The presented method can be used to locate the fragment and to measure the real velocity on its flying direction. It can also be used to measure the velocity of a fragment swarm after the system is engineered further.     

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.     

数码电子雷管中影响点火头性能因素分析

阐述了数码电子雷管中,点火药剂细结晶三硝基间苯二酚铅（LTNR）的制备工艺;从点火药剂的种类、加入黏合剂的质量分数、桥丝直径、点火头的电阻值、防潮漆的蘸涂等方面对点火头性能的影响因素进行了探讨;通过震动试验、并联起爆试验、延期精度检测与考核,试验结果表明：一次性合成的细结晶LTNR是制造数码电子雷管点火头较为理想的点火药剂,按技术要求生产的点火头性能指标能够满足行业标准要求。     

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.