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1.
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。  相似文献   

2.
针对电视制导导弹打击目标时框架角有限与落角约束要求,研究了三类具有落角约束的比例导引律:过重力补偿比例导引、Zarchan弹道成型制导律、变系数比例导引,提出一种变系数偏置比例导引。仿真结果表明,与另外两种制导律相比,变系数偏置比例导引弹道爬升高度较低,导引头需用框架角较小,可以保证电视导引头更好的锁定目标,具有一定的工程实用价值。  相似文献   

3.
姿态及过载自动驾驶仪比例导引对比研究   总被引:3,自引:0,他引:3  
文中在对过载自动驾驶仪和姿态自动驾驶仪进行对比分析的基础上.对过载自动驾驶仪加正常型比例导引律与姿态自动驾驶仪加积分型比例导引律对末制导精度的影响进行了对比研究。通过仿真分析可以看出,制导精度主要由导引头动力学和自动驾驶仪动力学中的慢环节决定。  相似文献   

4.
宋金超  赵良玉 《兵工学报》2023,(6):1795-1808
针对旋转弹采用捷联导引头和弹体追踪导引律时可能导致锥形运动失稳的问题,推导了捷联导引头在非旋转弹体坐标系下的动力学模型,建立了复数形式的弹体追踪制导控制系统数学模型;在不同弹体转速及阻尼回路增益情况下,分别考虑导引头响应延迟和陀螺标度因数误差,分析了上述制导控制系统的稳定性,并使用数值方法求得使其稳定的特征参数取值范围。研究结果表明:导引头延迟角越大,使系统稳定的制导回路增益上限越小;陀螺标度因数误差系数大于1时,使系统稳定的制导回路增益上限会变大,当陀螺标度因数误差系数小于1时,使系统稳定的制导回路增益稳定上限会变小。  相似文献   

5.
基于领弹-从弹架构的无导引头导弹协同定位与制导方法   总被引:1,自引:0,他引:1  
针对无导引头导弹在采用现有制导律时定位误差会产生较大脱靶量的问题,通过双领弹的领弹-从弹协同架构,设计了一种协同定位与制导策略,以实现无导引头导弹对静止目标的精确命中。基于扩展卡尔曼滤波,提出了一种无导引头导弹的协同定位方法。该协同定位方法与比例导引结合时存在终止时刻过载指令过大问题,因此设计一种新型变系数比例导引律,分析了变系数比例导引律的制导系数对脱靶量、终止时刻过载与最大过载的影响。仿真结果表明:采用所提出的协同定位方法可减小具有定位误差的无导引头导弹脱靶量,而采用变系数比例导引律可避免终止时刻过载指令过大。  相似文献   

6.
制导滑翔炸弹的最优末制导律研究   总被引:3,自引:0,他引:3  
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.  相似文献   

7.
针对采用捷联导引头的制导弹药受视场范围约束和末端角约束的制导问题,利用偏离追踪制导与圆弧制导相结合的方法,设计了满足多约束条件的制导律;通过研究并简化导弹的运动模型,利用视角控制与碰撞几何原理,获得了制导指令与视角控制指令;并通过数值仿真验证了该制导律的可行性,为全捷联制导弹药在多约束条件下的制导方案提供了理论基础.  相似文献   

8.
在末制导追击炮弹控制时,需要知道追击炮弹的实时姿态角。追击炮弹在发射时具有高过载,使得陀螺等传统姿态角测量系统无法工作。文中提出了使用磁阻传感器,利用地磁矢量信息对弹体滚转姿态角进行辨识,并对自动驾驶仪滚转姿态进行空中初始对准的低成本方案。仿真结果显示,该方法具有较高的滚转姿态初始对准精度。  相似文献   

9.
文中研究了简易制导火箭的制导控制系统,在基于自动驾驶仪与制导律相匹配原则的基础上,研究并仿真了速度矢量自动驾驶仪积分比例导引的制导控制系统方案.仿真结果表明,该方案是可行的.  相似文献   

10.
自适应交接律在复合制导弹道交接中的应用   总被引:3,自引:0,他引:3  
在弹道交接段中 ,导弹的导引性能、航向误差与交接导引律时间参数有关 ;文中在自适应交接制导律和零基交接制导律的基础上 ,对交接律参数的选择进行了研究 ,提出了考虑自动驾驶仪和弹体时滞时的参数选择条件 ,分析了航向误差对交接段参数选择的影响和弹道可交接的条件 ,最后给出了交接导引律参数的取值范围。  相似文献   

11.
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.  相似文献   

12.
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.  相似文献   

13.
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.  相似文献   

14.
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.  相似文献   

15.
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.  相似文献   

16.
An expression for estimating the aeroheating on a warhead nose at different supersonic speeds is proposed by incorporating CFD (computational fluid dynamics) and the least-square method. Compared with the traditional estimation formula, the expression is more accurate, convenient and can be used in the optimized design of warheads. The error from the result obtained in the test of a ball cartridge flight is less than 3 %. It satisfies the engineering requirements.  相似文献   

17.
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.  相似文献   

18.
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.  相似文献   

19.
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.  相似文献   

20.
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。  相似文献   

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