电磁拔销器在某引信中的应用

某型产品要打击多种状态目标,但可利用于解除保险的环境比较少,为解决这个问题,将电磁拔销器应用在引信中。该引信通过离机环境给电磁拔销器上电后吸附保险销,解除保险。并在隔爆部件运动到位后,给电磁拔销器断电,释放保险销,锁定隔爆件。实验验证了其方案可行。     

引信MEMS延期解除保险机构

针对传统引信延期解除保险机构结构尺寸大、保险距离短和延时时间散布大等问题,设计了根据弹道实时信息实现延期解除保险的MEMS指令锁延期保险机构。该机构由电推销器,金属簧片式柔性锁臂和活动腔组成,通过弹道实时信息控制电推销器发火,将柔性锁臂推入活动腔,实现延期解除保险的功能。分析了中大口径榴弹引信结构特征和发射内外弹道环境,模拟了电推销器的推力作用过程,利用ABAQUS有限元仿真软件对所设计结构进行仿真分析,对基于UV-LIGA工艺制作的原理样机进行了离心环境试验和电推销器配合试验。仿真和试验结果表明,该机构用于引信MEMS安全保险系统,可保证引信安全状态和可靠解除安全保险状态,且能够根据电路控制电推销器发火实现延期解除保险功能,可保证炮口安全距离和实现在弹道轨迹的不同点解除保险的功能。     

小口径弹药引信用滑块作动器

针对小口径弹药引信传统保险机构依靠发射环境解保带来的适用性受限问题,提出了不依靠弹药发射的环境力实现解锁的滑块作动器。该滑块作动器主要利用过盈配合结构保证弹药勤务处理阶段引信的安全状态和弹药发射后引信的可靠解除保险状态,同时可以根据需要增加后座保险锁。数值仿真和样机实验表明,滑块作动器原理可行,能够实现安全与解除保险的功能,为小口径弹药引信的安全保险机构设计提供参考。     

微机电锁销的电磁驱动电路

迫弹引信的MEMS安全保险机构没有明显的旋转环境可用,而电发冲推器体积大,不适宜与微型化的MEMS结构配合应用。为此,对于新设计的82 mm迫弹引信安全系统的微机电锁销,提出了电磁驱动的驱动方式,设计了驱动电路。该机构不直接利用惯性力解保,而是应用传感器采集环境信息、主控芯片控制驱动电路带动电磁驱动器吸附锁销磁体,解除保险,并在滑块运动到位后,释放锁销,闭锁滑块。实验验证了其实际驱动能力和抗冲击性能。     

基于永磁保险销的引信用电磁拔销器

针对传统电磁拔销器自锁力完全依赖弹簧预压力,存在功耗大、启动阻力大的缺陷,提出了基于永磁保险销的引信用电磁拔销器。该电磁拔销器将传统电磁拔销器的单一纯铁保险销改进为永磁保险销,利用保险销中的永磁体与下衔铁之间的吸力实现电磁拔销器自锁;采用通电启动时保险销中的永磁体与下衔铁间的斥力和保险销中的永磁体与上衔铁间的吸力共同作用推动保险销运动。仿真与试验验证表明,该电磁拔销器不仅大大减小了传统电磁拔销器自锁力对弹簧的依赖性,降低了电磁拔销器启动时的阻力,而且在同等功耗条件下输出的电磁力也有明显提高。     

迫弹出炮口信号检测及其在引信中的应用

引信发射过程中需要敏感不同的发射环境，用于引信安全系统的解除保险。分析了迫弹炮管附近磁场分布规律，提出用线圈传感器测试迫弹出炮口瞬间信号的方法，设计了存储测试系统并对迫弹出炮口信号进行了静、动态测试，最后对迫弹出炮口信息在引信中的应用进行了分析。     

用于隔离转盘类安全系统的波纹管式电推销器

针对传统电推销器推销方向单一,无法满足引信安全系统保险解除中弧线轨迹推销的问题,提出了用于隔离转盘类安全系统的波纹管式电推销器。该电推销器在电信号的作用下,点燃内部的火药,借助火药燃烧后产生的高压推力推动波纹状壳体伸长。由于褶皱状的波纹管具有可弯曲的特点,根据引信解除保险所需推销轨迹的需要,将其放置于任意方向的槽或孔内,使其既可沿直线轨迹运动,又可沿弧线轨迹运动,最终推动保险销脱离保险位置、转盘对正传爆序列。试验验证表明,该电推销器可满足隔离转盘类安全系统保险解除中所需直线及弧线轨迹的推销,实现引信安全系统保险的解除。     

一种新型深水炸弹引信解除保险机构设计

为了适应深水炸弹引信在深水中能够安全可靠的接触保险,设计了一种新型的多重引信保险机构,该机构具有投弹保险、限位保险和辅助保险的多重功能,发射保险利用投弹重力环境剪断剪切销解除投弹保险;限位保险利用水压力来实现水压机构的错位移动解除保险;辅助保险确保了引信在未正常工作的情况下的安全处理.通过试验验证了多重保险的可靠性,结果表明:该机构对于深弹引信的安全性和可靠性是可行的.     

引信MEMS保险机构剪断式后坐卡销

为了提高引信MEMS保险机构的安全和可靠性能,并针对非剪断式后座卡销受后坐力影响,卡销解除保险行程减小,系统安全性降低等缺点,提出了一种剪断式后坐卡销。通过仿真,表明该剪断式后坐卡销在高g环境下沿后坐力方向上的位移几乎为零,在10000g后坐加速度发射条件下,后坐卡销被后坐滑块完全剪断并解除保险。验证了该剪断式后坐卡销解除保险行程较大,安全性较高,满足可靠性要求。     

不断发展的先进的撒布器引信

一些新的引信起爆技术正被用于现有的和下一代弹药撒布器系统,它们是: 电子逻辑解除保险计时器——用电子定时器取代机械计时器可大大提高解除保险时间精度,这样就降低了对子弹药投放精度的要求,从而提高了引信的可靠性和安全性并降低了成本。引信/制导综合装置——它使各种弹上子系统能够将导航、最优作用方式和保险与解除保险信息传递给撒布器。撒布器为增加战术灵活性利用一先进的远距离投放系统以保证最佳的目标效应。电子保险/解除保险装置(ESA’s)——随着元件性能、可靠性、有效性和成本方面的改进,使采用拍击雷管的电子保险/解除保险装置成为可能。在现有撒布器系统的发展过程中正在采用这些新技术,通过进行这些小的技术改进而不是大规模地采用现代化的技术跳跃,可使这些改进在生产中很快地得以实现。此外,就引信的作用来说,变化越小则系统在安全性或性能方面所冒的风险越小。本文将详述这些新技术是如何运用现有的和下一代弹药撒布器系统,以示他们对引信的作用的影响。主要的论述将是战术弹药撒布器(TMD)引信的发展。     

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.