组合烟花用纸片对产品发射高度影响的探讨

通过实验研究了组合烟花纸片的不同放置形式以及不同发射筒内径下组合烟花的发射高度,分析了组合烟花中纸片对产品安全与质量性能的影响,实验表明目前通用的双纸片组是较为理想的组合烟花垫片方式.通过分析理论与实际发射高度的差异,提出了加大组合烟花的实验与理论研究的必要性.     

最新烟花专利摘要报道

烟花发射底座，发射类烟花发射座，安全引线连接器，一种安全的烟花表演及其发射方法，一种燃放烟花喷泉，一种带底的烟花外筒及其制造方法，一种文字燃放效果烟花，……     

礼花弹发射高度的激光电测法

提出了礼花弹发射高度测量的新方法——激光电测法。该方法是利用激光特性，依据光电测距原理，使用激光脉冲测距仪和经纬仪，快速、准确地测量礼花弹的发射高度。     

烟花用电点火头作用时间的测量方法

采用菲涅尔透镜和光电传感器,设计了一种烟花用电点火头作用时间的测试装置。利用该装置测量了多型烟花用电点火头的作用时间,并与高速摄像法测量结果进行了对比。结果表明采用该方法与高速摄像法的测量结果一致,符合欧盟烟火标准的相关要求,适合烟花用电点火头的检验。     

礼花弹发射高度研究

采用激光测高法（LHM）准确测量礼花弹发射高度，通过对测量数据的统计分析，寻找到目前礼花弹发射高度的分布规律，以指导产品的生产和工艺改进。     

烟花燃放效果图像测量方法的研究

介绍了一种烟花燃放效果检测的新系统.该系统利用图像分析设备与计算机程序相结合,对烟花的燃放效果进行仪器分析检测.实际应用表明:该系统能准确记录烟花燃放缺陷,提高烟花检测结果的可靠性,同时能记录效果性能参数,并可有效应用于烟花的研发设计.     

一种烟花用微烟发射药的设计及其性能

烟花用发射药主要是黑火药,黑火药燃烧过程中产生大量烟雾,严重影响烟花的观赏效果,造成环境污染.为解决烟花发射过程中产生烟雾量大的问题,设计了一种新型微烟发射药,其各组分配比为:NC 77%,NH4CIO41 3%,端羟基聚丁二烯(HTPB)5%和钝感剂5%,对微烟发射药和黑火药的点火与做功能力、烟雾性能及机械感度进行了...     

光电立靶测试系统及精度分析

高射击精度是每一个武器装备系统主要指标之一。本文先介绍了四光幕光电立靶密集度测试原理，利用四光幕交汇法即可测得靶上与的相应值；接着对发射和接收器件的选取进行了说明并分析了测量精度。经试验验证该测试系统安全能满足目前枪弹产品检验试验的要求。     

发射点定位误差对飞行器轨道融合解算精度的影响

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.     

两种天幕靶光幕交汇立靶测量系统分析

为了改善飞行弹丸立靶坐标测量系统的布置复杂、集成度低等缺点,提出了2种新型天幕靶的设计方法;根据立靶坐标的几何测量原理,采用单镜头双狭缝措施,设计了单镜头双狭缝交汇和单镜头双狭缝平行的天幕靶.利用两镜头构建了多光幕交汇测量弹丸坐标模型,采用高响应、低噪声阵列长条形光电探测器件,简化天幕靶结构设计,改善天幕靶探测性能.结合多光幕交汇测量系统数学模型,应用微分法分析了测量系统误差.靶场实弹试验结果表明,设计的2种新型天幕靶可以实现飞行弹丸坐标的测量,在高空大靶面条件下,坐标测量误差小于20 mm.     

Stability of the Third Generation Intensifier under Illumination

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.     

Passive Acoustic Radar for Detecting Supersonic Cruise Missile

A Passive Acoustic Radar is presented as a necessary complement to electromagnetic wave radar, which will be expected to be an effective means for detecting cruise missiles. Acoustic characteristics of supersonic flying projectiles with diverse shapes are expounded via experiment. It is pointed out that simulation experiment could be implemented using bullet or shell instead of cruise missile. Based on theoretical analysis and experiment, the ““acoustic fingerprint““ character of cruise missile is illustrated to identify it in a strong noise environment. After establishing a locating mathematical model, the technique of acoustic embattling is utilized to resolve a problem of confirming the time of early-warning, considering the fact that velocity of sound is much slower than that of light. Thereby, a whole system of passive acoustic radar for detecting supersonic cruise missile is formed.     

Design and Analysis of Test Schemes of Static Postponing Time on Shrapnels Used to Riot Control

The test scheme of static postponing time given in our actual national military test standard on shrapnels used to control riot is a nine-point test scheme on the combined action of three kinds of temperatures and three kinds of pressures,the consumed ammunitions are more excessive. Statistic analysis and tentative checkout about a lot of test data are done,feasibility gists are put forward for optimizing of the test design scheme. The optimizing design and data analysis of test scheme of the item are done by managing uniformity design theory, two scientific and reasonable six-point test schemes are confirmed. The feasibility and reliability of the optimizing design schemes put forward above are proved ulteriorly by test validating. The gained schemes not only have good design uniformity and little ammunition wastage and meet the test demand, but also have better forecast ability for the result data of other points using the mathematic models from the actual test points.     

Super-resolution Restoration of Remote-sensing Images

A novel image restoration scheme, which is super-resolution image restoration algorithm Poisson-maximum-afterword-probability based on Markvo constraint （MPMAP） combined with evaluating image detail parameter D, has been proposed. The advantage of super-resolution algorithm MPMAP incorporated with parameter D lies in the fact that superresolution algorithm MPMAP model is discrete, which is in accordance with remote-sensing imaging model, and the algorithm MPMAP is proved applicable to linear and non-linear imaging models with a unique solution when noise is not severe. According to simulation experiments for practical images, super-resolution algorithm MPMAP can retain image details better than most of traditional restoration methods; at the same time, the proposed parameter D can help to identify real point spread function （PSF） value of degradation process. Processing result of practical remote-sensing images by MPMAP combined with parameter D are given, it illustrates that MPMAP restoration scheme combined PSF estimation has a better restoration result than that of Photoshop processing, based on the same original images. It is proved that the proposed scheme is helpful to offset the lack of resolution of the original remote-sensing images and has its extensive application foreground.     

Design and Simulation of TF and TA Controller for Missile

A nonlinear terrain following(TF) and terrain avoidance(TA) controller is proposed for missile control systems. Based on classical TF algorithm (adaptive angle method), a new method for TF controller is proposed by using angle of attack. A method of obtaining terrain outline data from digital elevation map (DEM) for TF control is discussed in order to save store space. A TA algorithm is proposed by using bank-to-turn technique. The block control model, which is suitable for backstepping design, is given for nonlinear model of missile. Making full use of the characteristics of the system and combining block control principle and backstepping technique, a robust controller design method is proposed. Uncertainties in every sub-block are allowed, and can be canceled by using the idea of nonlinear damping. It is proved that the state tracking errors are converged to a neighborhood of the origin exponentially. Finally, nonlinear six-degree-of-freedom simulation results for the missile model are presented to demonstrate the effectiveness of the proposed control law.     

Expert Systems Aimed at General Design of Projectiles

Expert systems aimed at the general design of projectiles can implement a series of intelligent designs, such as the design of HE shell, the scheme expounded and proved, the emulation analysis and calculation, etc. Aiming at the product design feature, the expert system adopts the object-oriented knowledge representation and all kinds of inference control engines to describe and reason the relevant knowledge regarding the product through the microcomputer. It embodies the foundation of emulation analysis and simulated manufacturing of the shell. It makes use of the method that knowledge expression is combined with condition of inference to carry out the overall design and emulation and reference.The paper gives the ways through which the functions can be achieved, gives the modularization of reference and the design methods of systematization, puts forward the method of knowledge expression and working interface, and supplies a platform for similar products of the shell category that can be quickly designed.     

Three-dimensional Numerical Simulation of Combustion Field in the Combustion Chamber

In order to study the effect of rotation on the combustion in the underwater vehicle, a two-phase turbulent combustion process is described with Reynolds stress turbulence model, eddy-dissipation turbulent combustion model, P-1 radiation model and particle tracking model of liquid. The flow in the rotating combustion chamber is simulated at two different working speeds, 0 r/min and 1 000 r/min by Fluent software. The temperature, gas velocity, static pressure of wall and fuel concentration are computed and compared. The results show that the combustion in rotating combustor is faster and more effective.     

Software Communication Architecture Implementation and Its Waveform Application

This paper attempts to do a research on the development of software defined radio（SDR） based on software communication architecture（SCA）. Firstly, SCA is studied and a whole reference model of SCA3.0 core framework （CF） is realized; Secondly, an application-specific FM3TR waveform is implemented on the platform of common software based on the reference model; Thirdly, from the point of view of real-time performance and software reuse, tests and validations are made on the above realized CF reference model and FM3TR waveform. As a result, the SCA-compliant SDR has favorable interoperability and software portability and can satisfy the real-time performance requirements which are not too rigorous.     

Parameter Identification for the Valve Control Cylinder System of a Hydraulic Manipulator

In mechanical, hydraulic and electronic systems, the determination of system parameters is often challenging because liquid parameters often change significantly, due to variations in working and environmental conditions. Therefore, it is of significant practical importance to identify those parameters through experimental procedures. A systematic approach to identifying parameters in the valve controlling cylinder system of hydraulic manipulators is provided. It first derives the transfer function of the system, and then uses P control of PID control to predict system parameters. The predicted parameters are further validated using PID control. The prediction through simulation using MatLab language is utilized, which agrees well with experimental results.     

Design of Non-fragile Satisfactory Estimator for Linear Continuous Perturbed Stochastic Systems

The design problem of non-fragile estimator is addressed for a class of perturbed linear continuous systems. The perturbations occur on the plant and estimator parameters. The estimator designed should force the error system to achieve the desired decay rate and force the steady error variance less than the specified upper bound irrdevancy of the admissible plant perturbations and estimator perturbations. Consistency problem of the decay rate with the variance upper bound is first considered via linear matrix inequality （LMI） approach. The solution of the estimator parameter under specifications to be consistent is then discussed. The consistency condition of specifications and estimator parameter solution are transformed to feasible or minimum problems subject to a set of LMI respectively. The method is illustrated by a numerical example.