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1.
栗苹  陶高峰  郭建伟 《制导与引信》2002,23(2):12-14,32
分析了连续波多普勒引信信道泄漏,在此基础上,提出了一种干扰波形的设计方法,以一种自差式多普勒引信为例,设计出相应的干扰波形,并进行了仿真实验,证明了其有效性,同时将此方法与常用的干扰波形设计方法进行了比较,仿真结果证明了本文所示方法的优越性。  相似文献   

2.
将WKBZ简正波方法用于水下声道中的脉冲传播波形的计算、群速的求解.数值模拟了窄带脉冲在北太平洋水下声道中的传播波形,模拟结果反映出了比较明显的信号传输的多途效应.分析了简正波群速对脉冲波形的影响,在收发深度均位于声道轴上时,在远距离上实现了简正波的分离;同时分析了收发深度与简正波幅度的关系及对脉冲波形的影响,得出在某一深度不是所有简正波对脉冲波形有贡献的结论.  相似文献   

3.
从脉冲放电电路的等效电路及其微分方程出发,研究了脉冲放电电路RLC参数的辨识算法,并根据辨识结果进行了波形仿真,表明了该算法的有效性。  相似文献   

4.
一种高分辨雷达目标识别方法的研究   总被引:2,自引:0,他引:2  
探讨了高分辨率雷达视频回波特征提取及识别方法。鉴于时域视频回波波形特征变化较快,不适合作为目标特征进行识别。回波频域的波形(频谱)相差不大,为了提高谱的分辨率,本文提出对回波信号作Chirp-z变换,以提高谱的分辨率。理论分析与实验结果均表明以回波信号的Chirp-z变换作为目标特征优越性。以BP网络作为分类器,对两类目标进行了识别,仿真结果说明了此方法的有效性。  相似文献   

5.
本介绍了一种新颖的EDA软件-PSPICE的工作原理、分析方法和功能,提出了宏模型的概念和建立方法,基于宏模型和PSPICE的瞬态分析对坦克火控系统的相敏解调电路进行电路仿真。得到了电路仿趄图形和本件。对坦克火控系统典型电路如带阻滤波电路及双限比较器电路进行了灵敏度分析和优化设计,经物理电路实验验证,电路仿真得出的波形与实际示波测量的电路波形相一致,电路仿趄结果准确可信。  相似文献   

6.
声尾流自导系统接收信号模型研究   总被引:1,自引:1,他引:0  
研究了利用尾流回波信号、海面混响和航行噪声的声学模型生成作用于反舰自导接收通道时域信号的方法,并用上述声学模型,以国外对驱逐舰尾流气泡浓度测量数据和选取的自导参数为依据进行了定量计算,得到的波形与实航记录的波形相比具有一致性。研究结果可为电子注入式声尾流自导半实物仿真系统的信号生成提供依据。  相似文献   

7.
一种毫米波辐射计目标识别方法   总被引:4,自引:2,他引:2  
根据毫米波辐射计的波形特点提出一种目标识别方案,给出计算机仿真结果;进一步探讨了目标识别方案的硬件实现,并讨论了这一方案的计算量问题。  相似文献   

8.
陈朗  冯长根 《兵工学报》2003,24(1):121-124
为了准确观察炸药驱动金属运动的细节。用激光速度干涉仪(VISAR)测量了金属平板表面速度变化历程,介绍了激光速度干涉仪测量参数确定和原始干涉波形信号的处理方法。讨论了波形信号丢失情况,如何判断丢失的条纹数及对测量速度进行修正的方法。对于单灵敏度激光速度干涉仪,通过对测量速度的理论估算。能够帮助判断丢失条纹数。从而得到正确的测量结果。  相似文献   

9.
在对信号模糊函数分析的基础上,提出了依据模糊原理进行引信信号波形设计的原则,并对引信波形的设计方法作了探讨。  相似文献   

10.
在对信号模糊函数分析的基础上,提出了依据模糊原理进行引信信号波形设计的原则,并对引信波形的设计方法作了探讨。  相似文献   

11.
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   

12.
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   

13.
The stability under illumination of transmission-mode GaAs photocathode sealed in the third generation intensifier is investigated by use of spectral response testing instruments. The variations of spectral response with the illumination times under weak and intense illumination are compared. The variations of photoemission performance parameters are also characterized. The results show that during initial several weak illuminations photocathode behaves no evident decay and a maximum sensitivity is achieved, while under intense illumination the sensitivity of photocathode begin to decrease largely at the first illumination. The calculated performance parameters show that the variation of surface escape probability with illumination times is a direct cause of instability of photocathode. It is also found that under intense illumination peak wavelength is moved towards short-wave and peak response is decreased, which shows that the ability of long-wave response of photocathode is decreased.  相似文献   

14.
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   

15.
The implementation of a missile's visual simulation system is explained that is developed with OpenGL(open graphic library) and the flight path and flight carriage in different stages of the missile are displayed. The establishment problems of the 3D scene are circumstantiated including the construction and redeployment of the model, creation of the virtual scene, setting of the multi-viewports and multi-windows etc. The missile's data driver, system flow, the modules and their mutual relations of the missile visual simulation system are discussed. The missile flight simulation results and effect of the scenes are given.  相似文献   

16.
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   

17.
A new dynamic encryption application in ad-hoc networks is proposed. The advantages of this method are its being able to use the previous ciphertext as a seed of a new encryption process, rendering the encryption process effective in all communication process by continuous dynamic key generation together with synchronization, and its capability to cut back on system bandages to a greater extent, which is valuable for the ad-hoc circumstance. In addition, the rationality and effectiveness of this novel encryption method have been verified by the test results.  相似文献   

18.
Puts forward a new method in machining microelectrode by electro chemical machining (ECM) and plastic deformed theory. The procedure of this method is to machine the microelectrode according to the basic rule of ECM theory at first. Then, with the change of ECM machining parameters, one of the microelectrode ends is exerted by a load. As a result, the elastic and plastic deformation is produced at the machining section and the microelectrode diameter is reduced. It has been proved that the proposed method can determine the optimum machining parameters to machine the microelectrode of Cu.  相似文献   

19.
To address a problem of autonomous attitude determination algorithm using gravitational field and geomagnetic field observation, a new recursive optimization autonomous attitude estimation algorithm is proposed. The algorithm is based on unscented Kalman fiher(UKF), and can synchronously provide the attitude rate information. The simulated results show that the measurement precision of the method could be increased by 2 times compared to that of the common methods.  相似文献   

20.
The error coefficient estimation of inertial platform in the course of its consecutive ground calibration is studiedA separate-bias algorithm is adopted to estimate the error parameters effectively. The ill-conditioning problem of the equation solution caused by the huge state dimension is also resolved. And the simulation result shows its validity.  相似文献   

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