液氢液氧火箭发动机用点火器的高空点火试验

日本宇宙开发事业团正在进行研制的液氢液氧火箭发动机的主点火器和燃气发生器用的点火器,在低压(约10乇)环境下共进行点火试验194次,累计时间1440秒。点火试验条件:点火燃料入口温度从130K到常温;点火器燃烧室压力为1～4公斤/厘米~2·绝;混合比为0.5～1.5。主点火器的燃烧室压力为1公斤/厘米~2·绝左右时,往往点火延迟、燃烧效率降低。流入的氢氧温度越低,越不容易点着火。液氧流入时间偏差±0.1秒(超前或滞后)对点火特性没有影响。已试验过的四种励磁式火花塞中,电极为纯镍材料,具有二次间隙电容放电式的火花塞,点火可靠性高。燃气发生器用点火器在燃烧室压力为1～7公斤/厘米~2·绝时点火性能良好,特征排气速度效率为90～95％。经过试验也测出了主点火器的点火界限和点火器燃烧室出口处的温度分布。     

桥丝式电点火头贮存失效敏感参量的研究

通过模拟加速寿命实验,测定了某型号电点火头的桥丝电阻、50%发火电流、点火延迟时间、桥丝熔断时间、药剂颜色随贮存时间的蜕变,讨论了哪种参量最适合作为评价该类电火工品贮存寿命的问题.     

3种点火药点火性能试验研究

以常用点火药剂NC(硝化棉)、奔奈和BP(2~#小粒黑)作为点火药,以点火延迟时间及特征点火药量作为点火性能判据,考察了3种点火药的点火性能。点火性能实验结果表明:BP点火延迟时间最短,电热镍镉桥丝点火时间约23ms;奔奈点燃发射药的能力最强,点燃RGD7A基发射药特征点火药量较NC和BP少6%;使用BP和奔奈作为点火药,可使装药的点火燃烧速度提高。     

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。     

基于定性与定量检测的火工品剩余寿命预测方法

针对火工品加速寿命试验及检测只对其整体进行,没有与火工药剂在相同条件下的性能变化相结合的问题,设计了火工品和火工药剂的步降应力加速寿命试验方案,以提高试验效率、扩大寿命预测的信息量。通过对试验后火工品和火工药剂的定性与定量检测,建立火工品可靠度变化曲线和火工药剂性能退化曲线,将两者相结合得到火工品失效判据及剩余寿命预测模型。实例分析表明,该方法降低了寿命预测的难度和工作量。     

斯蒂芬酸铅的半导体桥点火试验研究

通过对半导体桥(Semiconductor Bridge,SCB)装药条件下发火电压、发火电容及积分能量对点火时间影响的对比,结合不同点火条件下,桥体两端电压曲线、电流曲线和电流二次峰出现时间的比较,研究了斯蒂芬酸铅(LTNR)的半导体桥点火机理。试验发现特定的点火电路下,SCB点火时间存在一个临界值,且SCB等离子体形成的快慢直接影响点火时间。在充电电压从大到小的点火过程中,在桥与药剂之间存在2种不同的点火机理,在较高点火电压下为等离子体点火机理,在低电压为热点火机理。     

某导弹点火装置B-KNO3输出装药设计及试验

为了实现某导弹发动机的稳定点火,对点火装置B—KNO3输出装药的药型和药量进行了设计及试验,确定了点火药量为（2．5±0．1）g,药型为环状,并通过相关试验验证了B-KNO3输出装药的强度及输出性能,验证试验表明B-KN03输出装药满足发动机点火要求。     

长药室装药中多点点火技术试验研究

为解决大口径火炮长药室装药轴向点传火问题,针对药室长度超过3 m的长药室装药,设计了多点点火系统,进行了多点点火研究.运用高速摄像研究了点火头的发火一致性,结果表明,C型点火头4 ms内全部点燃,发火一致性高于A型和B型;测量了不同长度的多点点火管的压力-时间曲线,结果表明,两节和四节模拟装置试验p-t曲线基本重叠,时...     

纳米Al-MoO_3发火性能研究

为研制高能量密度无铅的火工药剂,以纳米铝粉和纳米氧化钼为原料,采用超声分散混合的方法,制备了绿色环保的纳米含能材料Al-MoO3。通过冷场扫描电镜和差热分析(DSC)对纳米含能材料Al-MoO3进行了表征分析,制作了电点火头和激光点火头,进行了点火性能测试。结果表明:纳米含能材料Al-MoO3在520℃以上的高温条件下反应,放出大量的热,其中电点火头的50%的电压发火感度为22.8V,激光点火头的50%的发火感度为5.1mJ。     

一种含HMX的新型高能点火药

采用理论计算与试验方法对某含HMX的高能点火药性能进行了研究。结果表明：理论计算与试验结果基本相符,随着HMX含量的增加,该点火药输出能量变化小,爆热值均大于9000J／g;残渣量略有减少,均大于80％;同时,药剂比容明显增大。热分析实验表明：HMX与Mg-Al合金、KClO4具有良好的相容性,加入HMX后点火稳定性增强;感度测试结果表明：HMX含量从5％增加至10％时,点火药的撞击感度增加,摩擦感度与火焰感度无显著变化。     

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.     

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.     

Overview of Anti-tank Mines

First the different anti-tank mines laying possibilities are shortly summarized： hand emplaced, with mine layers, ground or helicopter relatively topographical well defined, and with cluster systems of projectiles, rockets and aircraft dispensers. Then examples of the three generations of anti-tank mines are presented：Ⅰ generation： detonating only beneath the track; Ⅱ generation： detonating beneath the track and belly; Ⅲ generation： mines with off-route actions. Weight and cost comparisons are strongly favoring the off-route Ⅲ-generation mines.     

A Finite Element Analysis on Static Strength of a Complex Section

A static finite element analysis （FEA） of an impulsive controller section is presented. The boundary condition and a part of the loads are applied. Considering the grades of the stress around the holes being large, the dense grids are adjusted accordingly. Four cases with different loads are compared, thus the influences of different loads on the section are analyzed. Numerical results show that the maximum stress of the section is lower than the strength limit of the material, and the section will not be broken with the static loads.     

Discussion on Mechanism of Breech-Blow Caused by Propellant Charge

From the view point of launch safety caused by fracture of propellant charge, this paper points out that the safety criterion of pressure wave is inadequate to evaluate the launch safety of propellant charge based on the initial negative differential pressure and sensitivity tests. Generally, the maximum barrel pressure does not depend upon the intensity of pressure wave correspondingly. The pressure wave intensity can not describe the fracture degree of propellant charge in chamber and reflect the mechanical environment of propellant charge fracturing exactly and wholly. The evaluation criterion for launch safety of propellant charge should be built on the basis of depicting the fracture degree of propellant bed.     

Experimental Studies of Toxicity on HNIW and Its Intermediates

The polycyclic nitramine hexanitrohexaazaisowurtane（HNIW） is a compound of high energy density. HNIW can replace 1, 3, 5-trinitro-1, 3, 5-triazacyclohexane（RDX） or HMX, hut its toxicity is unknown. In this paper, HNIW, hexabenzylhexaazaisowurtzitane （HBIW）, tetraacetyldibenzulhexaazaisowurtzitane （TADBIW）, tetraacetyldiformylhexaazaisowurtzitane（TADFIW） and tetraacetylhexaazaisowurtzitane（TAIW）, which are intermediates of the synthesis of the HNIW, were selected as the tested objects in acute toxicity test, acute eye stimulation test and skin irritation test according to the standards of ＂chemical product testing method-401 ： acute oral toxicity test＂, ＂chemical product testing means-405： acute eye irritation/corrosion test＂ and ＂chemical product testing means-404： acute dermal irritation/corrosion test＂ of National Circumstance Protect Bureau. The results show that all of the five objects have no toxicity, no stimulation to eye and skin under the tested conditions.     

Dynamic Simulation for Missile Erection System

In order to study the dynamic characteristics of the missile erection system, it can be considered as a rigid-flexible coupling multi-body system. Firstly, the actual system is abstracted as an equal and simplified one and then the forces applied to it are analyzed. Secondly, the rigid-flexible coupling dynamic simulation for erection system is accomplished by use of the system simulation software, for example Pro/E, ADAMS, ANSYS, MATLAB/Simulink, etc. Finally, having the aid of simulation results, the kinetic and dynamic characteristics of the flexible bodies in erection system are analyzed.The simulation considering the erection system as a rigid-flexible coupling system can provide valuable results to the research of its kinetic, dynamic and vibrational characteristics.