电视制导侵彻炸弹落角约束变结构制导律

针时电视制导侵彻炸弹需要控制弹着角的要求,研究了具有末端落角约束的变结构制导律．谊制导律包含了重力对弹道法向加速度的影响,将制导指令经过一阶低通滤波器滤波,实现对弹体攻角的估计．通过数学仿真,讨论了制导律参数时制导效果的影响,检验了制导律在不同投弹备件和不同期望落角下的制导效果．仿真结果表明,所采用的攻角估计方法是可行的,该制导律能够满足侵彻炸弹在攻击固定目标时对脱靶量和弹着角的双重要求．     

制导侵彻炸弹末端弹道成形方案设计与应用

针对制导侵彻炸弹落角约束增强毁伤效果的要求,提出了带落角、攻角约束的末端最优成型弹道方案。通过对飞行控制系统应用分析,设计了保证炸弹末端攻角收敛的攻角控制算法。利用数学仿真,研究了不同重力补偿程度对制导效果的影响;检验了在低空、高空投弹和不同期望落角条件下弹道成形方案的制导效果。仿真结果表明了当制导侵彻炸弹攻击静止目标时,采用常规重力补偿末端弹道成形方案具有较强的有效性和实用性。     

侵彻型制导炸弹的末制导规律研究

根据被动寻的侵彻型制导炸弹的运动特点,设计了能够满足多项约束指标的滑模制导律,并对滑模稳定性进行了证明。仿真结果表明,该制导律能够满足脱靶量和侵彻型制导炸弹对末端攻角及弹道倾角的要求,对参数摄动具有一定的鲁棒性,说明了所设计制导律的有效性。     

一种多约束条件下的最优末制导律研究

为了更好地满足现代导弹武器多约束、高精度制导的基本要求,提出一种新的最优末制导律。在综合考虑落角和末端攻角的要求下,用二次型最优控制推导出新的制导律,并给出了零阶无时延系统的表达式,最后运用典型弹道仿真和对比试验验证了该制导律的良好的弹道性能。仿真结果表明：该制导律不但能够满足多约束高精度制导的要求,而且对落角、末端攻角控制和早期弹道修正具有较大的优势。     

采用比例导引的侵彻型制导航弹末段攻角控制分析

制导航弹为实现侵彻必须对末段姿态进行控制.在采用过重补比例导引制导律来增大落角的同时,也使末段攻角比较大.而大攻角对侵彻是不利的,因此需要对末段攻角进行控制,文中对侵彻型制导航弹末段攻角控制的理论和实现方法进行了探讨.     

图像制导空地导弹攻顶弹道方案研究

空地制导武器侵彻战斗部为达到最佳毁伤效能,在保证精度的同时,对落角提出了严格的要求.首先基于二次型最优理论推导了满足落点及落角约束的最优制导律.以远程图像制导空地导弹为背景开展攻顶弹道方案研究,针对纯惯导使用条件要求,提出了末导时间tgo算法,同时制导律参数以导引头框架角约束实现自适应.通过仿真计算验证弹道方案的可行性.     

制导滑翔炸弹的最优末制导律研究

以滑翔制导炸弹为背景,利用最优控制理论,结合求解状态转移矩阵的方法,推导了一种具有末端姿态角约束的最优末制导律.该末制导律保证了脱靶量和控制能量消耗最小的性能指标,适用于攻击地面固定目标.通过数字仿真,并与有末端姿态角约束的修正比例导引律进行对比.仿真结果表明该最优末制导律在满足制导精度要求下提高了末端入射角.     

扩展的多约束最优制导律及其特性研究

为满足侵彻攻击空地导弹末端制导要求,解决当前多约束制导律终端攻角控制问题,设计了包含受剩余飞行时间决定的控制量权函数,并引入到最优问题的目标函数中,基于线性二次最优控制理论推导得到一种扩展的多约束最优制导律。利用指令随时间变化解析表达式及伴随系数法,对制导律加速度指令变化规律及无量纲脱靶量特性进行了研究,证明了制导律指令的收敛性,从而为终端攻角控制创造了有利条件。同时,讨论了制导律增益n的设计原则。结合工程应用的需要,分别提出了一种制导初始条件设计方法及最大需用加速度的估计方法,可有效减小导弹末端机动。通过仿真验证了制导律及分析结论的有效性。     

制导炸弹自适应比例末制导律研究

针对制导炸弹采用捷联导引头和进行侵彻型攻击的技术要求,设计了一种具有终端角度约束的自适应比例导引律。基于经典比例导引关系,首先以期望落角为性能指标推导出变系数导引律,然后利用反馈的误差信息对导引系数进行自适应闭环校正,以增强导引律的鲁棒性。仿真结果表明,所设计的制导律具有较高的制导精度,并且满足落角约束要求。     

几种增大空地导弹落角的制导方式比较

为提高对加固掩体、地下指挥控制中心等硬目标的毁伤效果,新型空地导弹需要使用较大的落角攻击目标。文中首先对两种可实现大落角攻击的制导方式——过重补比例导引和Zarchan弹道成型制导律进行了仿真分析,并提出了"Zarchan弹道+比例导引"组合制导方式,仿真分析表明,该组合制导方式可实现接近90°的末端落角,比较适合于防区外发射空地导弹和高空投放的制导炸弹。     

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.