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1.
针对试验中出现的初始段跟踪数据缺失情形,研究利用修正制导工具误差后的遥测数据转至发射系下弥补外测跟踪数据的逆向递推方法,给出了实际实现方案.从微分方程理论出发,推导了初始跟踪数据误差影响积分终值误差的结论.仿真计算给出了符合工程实际的全程弹道,并验证了误差理论分析的正确性,位置误差基本为初始位置偏差加上初始速度偏差的积分,速度误差为初始速度偏差加上一个小量.  相似文献   

2.
利用初段获取的遥外测数据准确实现对各项初始误差的分离是动基座发射飞行器精度分析的重要环节。着重初始误差影响机理分析,推导遥外测视速度差的计算公式,详细分析平台惯性坐标系和发射坐标系的关系,建立视位置域下的初始误差分离线性模型。利用弹道仿真平台生成遥外测数据进行初始误差分离的仿真分析,验证模型和估计方法的正确性和可行性。  相似文献   

3.
发射点定位误差对飞行器轨道融合解算精度的影响   总被引:1,自引:0,他引:1  
在靶场试验中,发射原点初始状态(位置、发射方位角等)准确与否非常重要.依据轨道数据处理的流程,在理论上给出了发射原点误差对非线性融合方法解算外测轨道的影响.建立了发射原点不准对于发射坐标系与测量坐标转换的关系;并利用非线性融合算法,研究了发射原点的误差对轨道参数的影响.仿真计算结果表明,发射原点误差对于飞行器精度分析与精度鉴定有较大影响,需要重点考虑.  相似文献   

4.
海基制导工具系统误差分离,是潜射导弹精度分析的重要课题.首先分析了潜射导弹的弹道数据受发射时的初始状态,如原点定位与潜艇初速等各种因素的影响,然后在速度域上综合考虑初始误差和制导工具误差,建立海基制导工具系统误差分离的非线性系数模型,最后给出估计算法并进行仿真评定.计算结果证实模型和算法的可行性.  相似文献   

5.
谢超  顾青涛  龚亮 《弹道学报》2022,34(3):28-34
为了解决航天靶场实时外测弹道人工拣择带来的不准确、不稳定、鲁棒性不强以及缺乏参考标准等缺点,以提高指控中心指挥决策的准确性和高效性,应用空间坐标变换理论和经典动力学理论分别构建了遥测角度同外测速度、遥测视加速度同外测加速度的关联模型,建立遥测信息同外测弹道信息的关系,提出了一种基于遥测信息的外测弹道择优方法。以某火箭理论弹道数据和理论遥测数据为输入,对遥测角度同外测速度、遥测视加速度同外测加速度的关联模型进行仿真验证,由仿真结果可知关联模型的误差很小,从而验证了关联模型的正确性。最后以火箭实际测量外测弹道数据、遥测参数信息为输入,应用弹道择优方法得出全局择优弹道,将全局择优弹道、其他局部外测弹道同事后高精度弹道进行比较,由比较结果可知全局择优弹道的综合误差最小,从而验证了择优方法的有效性和正确性。基于遥测信息的外弹道择优方法正确建立了某些关键遥测信息同外测弹道信息的关联模型,能够选择出精度较高的外测弹道,从而能够为指控中心提供更多的弹道择优辅助决策手段,具有较强的理论应用价值。  相似文献   

6.
为分析并修正发射点垂线偏差对导弹惯性制导精度的影响,建立了完整的惯性制导误差传递模型,通过基于标准弹道参数的误差仿真,得出不同射程、射向条件下垂线偏差引起的惯性制导误差特性,其中,视加速度投影误差是产生制导误差的主要因素,引力加速度计算误差和自瞄准误差的影响也不可忽略.利用该误差传递模型对垂线偏差影响进行计算和修正,可有效提高导弹惯性制导精度.  相似文献   

7.
对军用装备的投放过程建立偏微分方程组模型,确定满足投放要求的最佳投放位置和投放速度,分析了在投放位置和投放速度均存在合理误差的情况下,落地点的区域范围,并进一步对投放轨迹进行修正,以减少由于投放位置和投放速度的误差对投放精度的影响,通过采用蒙特卡罗方法进行仿真模拟,结果表明,该偏微分方程组模型以及通过对装备投放轨迹修正更加有利于实现对投放过程的精确控制.  相似文献   

8.
齐占元  张靖  朱伯立 《兵工学报》2004,25(5):567-571
为了解决近程导弹惯导系统在肩扛瞄准过程中的初始对准问题及惯性器件误差对其影响,提出了初始对准方法.该方法是在发射前对扰动加速度进行测量并予以平均并在瞄准试验的基础上建立起来的.通过把比力矢量向一个在惯性空间中稳定的临时平台坐标系中投影,可以建立初始对准过程的数学模型;再经坐标变换和相似变换建立误差分析数学模型,该模型给出了惯性器件的误差分配关系.根据试验数据进行数字仿真,验证了初始对准数学模型的正确性和可行性.  相似文献   

9.
为了分析加速度传感器的数据误差对弹道积分解算的影响,基于刚体六自由度外弹道模型,对加速度传感器特征参数频率以及常见数据误差类型进行仿真分析,以1500 m为积分距离标准,得出满足积分偏差在5‰以下要求时,传感器需要满足的条件。仿真结果表明,为满足弹道积分解算精度要求应保证加速度数据更新频率不小于300 Hz;弹道积分误差随着积分距离的增长呈指数式增大;加速度水平距离积分误差与加速度数值误差保持较强的线性关系。  相似文献   

10.
针对采用遥测数据包包校验技术判别遥测定位数据有效性时,产生的过度滤除有效定位数据以及无效数据滤除不干净的问题,提出了一种基于DS证据理论的遥测定位数据有效性实时判别方法。利用遥测数据中的定位数据的位置、速度、加速度信息和理论弹道位置、速度、加速度信息,预测遥测定位数据的合理范围,使用DS证据理论原理,直接判断遥测定位数据的有效性,试验结果表明,该方法可以有效地滤除遥测定位数据中的无效数据。  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.
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   

14.
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   

15.
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   

16.
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   

17.
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   

18.
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   

19.
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   

20.
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.  相似文献   

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