基于FIR滤波器的冲激引信谐波噪声消除方法

由于基于取样积分器的冲激引信其接收机输出的谐波噪声能够通过中频滤波电路,导致超宽带回波信号被淹没。分析了采用矩形窗函数法设计的FIR多带阻数字滤波器,并用此滤波器消除谐波噪声。仿真验证了该FIR滤波器使平均信噪比提升了4.1d B以上,可有效消除谐波噪声所带来的不利影响,提高冲激引信定炸精度。     

索尼Xperia SP M35t：灵巧的“彩带”尤物

近年索尼加快了争夺市场的步伐,其产品布局也向广度不断扩展,产品的型号中,既有走高端路线也Z系列,也有今天走亲民中端路线的Xperia SP M35t.     

α-β和α-β-γ滤波在延时控制起爆算法中的应用

制导引信一体化起爆算法研究的一个重要方面就是通过对最佳起爆延时的估计来确定炸点,而对测量数据进行滤波从而提高炸点的估计精度是其中的一个必要环节。α-β和α-β-γ滤波算法ααα具有计算简单,工程中易于实现的特点。本文针对导引头测距测角模型中基于延时控制的算法,使用c＋＋builder工具进行仿真试验。研究结果表明在基于导引头测距测角模型进行起爆延时的计算中,α-β和α-β-γ滤波是可行的,同时根据仿真讨论了在滤波中影响炸点估计精度的因素及如何合理选取δ因子。     

基于仿真网格的引信虚拟试验研究

利用蒙特卡洛模拟实现对引信解除保险时间的计算机虚拟试验,以减少或部分替代高价值弹药的靶场射击试验.依据机械设计软件进行三维模型随机尺寸偏差的生成研究,建立了能生成具有一定概率分布特性的尺寸公差的系统;利用仿真网格技术构建了引信虚拟试验系统,并对某引信进行了多组尺寸偏差变化下的虚拟试验,验证了公差对引信解除保险时间的影响.     

基于LabVIEW的引信机构控制与测试系统

可编程引信弹道环境仿真与测试平台是研究引信机构动态特性的试验装置,为了获得准确的试验结果,必须建立配套的测试系统.本文建立了引信机构控制与测试系统,完成了对可编程引信弹道环境仿真与测试平台多个电机进行同步控制与测试,解决了工程中遇到的新问题一引信机构动态特性的测试问题,该系统测试精度高,并且成本低.     

基于虚拟仪器的无线电引信测试系统设计

本文设计了一种基于虚拟仪器的无线电引信数据采集测试系统.描述了该系统的组成结构和工作原理,详细地给出了相应的实现方法,并将其应用到无线电引信的工作频率、起爆灵敏度和检波信号的测试中,取得了良好的效果.为无线电引信的测试和评价提供了一种新的思路和手段.     

3-TPT并联机构运动性能研究

以3-TPT并联机构作为研究对象,建立该机构的运动学正、反解方程,求出该机构的雅可比矩阵及其逆矩阵,并在此基础上运用MATLAB软件和LabVIEW软件对该机床的奇异性、灵,5性和平稳性性进行仿真分析。仿真结果表明：3-TPT并联机构不存在奇异位形,并且拥有较好的灵巧性和平稳性,这为并联机构的最优化设计及控制系统设计提供了理论基础,并为确定工作形位和机构尺寸提供了设计依据。     

Design, analysis and control for an antarctic modular manipulator

Antarctic scientific expedition has important strategic significance. It is an inevitable trend to apply robots to assist researchers during the Antarctic expedition. However, the robot manipula- tors at present have a series of problems and unable to meet the requirements of the Antarctic expe- dition. In this paper, a novel Antarctic modular robot manipulator is proposed, which has a compact structure with modular joints. The robot manipulator has high reliability, and quick assembling-and- disassembling ability. Through well wires arranging and thermal controlling, the manipulator can better adapt to the Antarctic environment. In addition, the work space of the manipulator is serious- ly analyzed, and a new hybrid position/force control method is adopted to make the manipulator per- form better. Simulation results validate the control method and show that the robot manipulator has a good performance to meet the requirements of Antarctic expedition.     

Three dimensional simulation of electromagnetic railgun’s exterior ballistics

In order to evaluate the electromagnetic railgun＇ s practical combat capability as well as its tactic application prospects, a three dimensional simulation model of electromagnetic railgun＇ s exterior ballistics is presented. On the hypothesis of the Earth＇ s being round and ignoring the influ- ence of rotation, the railgun＇ s atmospheric environment and its motion equations are established by the Simulink Module of Matlab. And the railgun＇ s characteristics of exterior ballistic under different muzzle energy and emission inclinations are discussed. Results show that its incomparable superiori- ty in improving range and lethality to conventional artillery under the same launch condition based on railgun＇ s range and variation of velocities. It is useful for the efficacy evaluation of railgun＇ s combat capability and its practical applications in fields such as ground war, missile interception and so on.     

Numerical study on the shock responses of submunition drop on various mediums

The shock responses of submunition drop on various ground-mediums are modeled and investigated by numerical simulation in this paper. Submunition impacts on concrete surface, gravel ground or sand with various drop velocities, different drop angles and attack angles are calculated in a finite element program. The loads and dynamic responses of submunition are analyzed, curves of various drop velocities, drop angles and attack angles related to peak overload are calculated and law of interaction time on different ground mediums is obtained.