预警机空域配置对责任区覆盖的影响

针对预警机遂行责任区情报保障任务时的空域配置问题,提出了对责任区实时有效全覆盖和确保自身安全两条基本原则,并以预警机实际垂直探测威力为基础,构建了重点高度层实时全覆盖区域估算模型。通过仿真,分析了实时全覆盖区和预警机空域配置关键参数之间的关系,其结果表明当预警机直飞航线平行于带状责任区近界时,可获得最大的实 时覆盖长度,在实际的预警机空域配置中具有一定的实用价值。     

延长区块陆相页岩水基钻井液性能优化评价

延长陆相页岩气资源量丰富,勘探开发处于早期研究阶段。储层地质情况复杂,水平井钻井时常发生井塌等事故,为保持井壁稳定常使用油基钻井液,而油基钻井液又面临环境保护和高成本等压力,为此,研制出页岩水基钻井液体系PSW-1。PSW-1钻井液用0.2%聚合物BOP、2.0%提切剂TQ-1和2.0%的润滑剂ORH-1进行处理,以改善其携屑能力和润滑性。PSW-1的动切力为10 Pa、静切力为4.5 Pa/10 Pa、润滑系数为0.07。经过在4口页岩气水平井的现场应用,PSW-1钻井液能有效地悬浮、携带岩屑,大幅降低钻进时的摩阻;失水量为2.0～2.8 mL,井径扩大率仅为6.34%,有效保持井壁稳定和井下安全。为低成本、高效开发延长陆相页岩气水平井提供技术支持。      

动能拦截弹特性及其对抗措施

研究了国外多种动能拦截弹（KKV）导引头的制导方式和大气层外动能拦截弹的导引方式．对大气层外动能拦截弹的制导特性和拦截能力进行了研究,包括拦截空域、杀伤半径、横向修正能力等．提出了针对大气层外动能拦截弹的多种红外对抗手段．     

Thermal analysis of above-grade wall assembly with low emissivity materials and furred airspace

A 3D numerical model was developed to investigate the effect of foil emissivity on the effective thermal resistance of an above-grade wall assembly with foil bonded to wood fibreboard in a furred assembly having airspace next to the foil. This model solved simultaneously the energy equation in the various material layers, the surface-to-surface radiation equation in the furred airspace assembly, Navier–Stokes equation for the airspace, and Darcy and the Brinkman equations for the porous material layers. In this work, the furring was installed horizontally. In the first phase, the present model was benchmarked against the experimental data generated by a commercial laboratory for an above-grade wall assembly. The wall consists of a conventional wood frame structure sheathed with fibreboard and covered on the interior side with a low emissivity material bonded to wood fibreboard that is adjacent to a furred airspace assembly. The results showed that the predicted R-value was in good agreement with the measured one. After gaining confidence in the present model, it was used to predict the effective thermal resistance of the same above-mentioned wall but having Oriented Strand Board (OSB) sheathing in lieu of wood fibreboard sheathing. In the second phase, the model was used to quantify the contribution on the wall R-value by having a low foil emissivity. The results showed that a low foil emissivity of 0.04 can increase the R-value of this wall to as much as ∼9%. This is on-going research. The present model is being used to investigate the transient thermal response of foundation wall systems with furring installed horizontally and vertically, and subjected to different Canadian climate conditions.     

绿色环保直流充电机

介绍了一种具有绿色环保概念的直流充电机的新型充电方法———阶梯充电法的工作原理 ,该方法具有可靠性高、简单实用、无容量限制、不含谐波分量、对电网不产生电磁污染等特点。该直流充电机具有很好的应用前景     

应用红外图像识别技术的电机滑模变结构同步控制方法

为了使电机机械部件按照标准要求运行、满足自动化生产需求,提出一种应用红外图像识别技术的电机滑模变结构同步控制方法。利用光学系统、扫描器、探测器和制冷机等设备,组成热成像系统,采集目标具体信息,通过空间域增强和灰度均衡操作,增强图像整体画质和均匀灰度值,利用 Laplacian 算子锐化图像边缘,丰富细节信息,保护图像背景,将静止坐标系变换为旋转坐标系,结合电机的电压、定子磁链与转矩方程,构建电机运动数学模型;针对滑膜同步控制器,预留图像传输接口,将图像信息转变为电信号,选取切换函数,设置函数切换、状态变量和等效 3 种控制规律,结合不同目标实际情况,完成滑膜变结构同步控制。仿真结果表明,该算法能够获得更多目标信息,提供丰富的控制依据,提高了电机滑模变结构同步控制过程的精准度和稳定性。     

拦阻射击下“金属风暴”武器系统的作战使用

针对“金属风暴”武器在近程防御中的使命任务,通过接收目标指示,捕获、跟踪目标,拦阻射击的解相遇,射击校正,射击诸元解法,待机控制,控制“金属风暴”射击,转火和停火,分析该武器系统的作战使用条件和系统组成,设计了射击校正流程以及拦阻射击方式下“金属风暴”武器的作战使用特点和流程。为“金属风暴”武器将来的系统设计提供一定的参考意见．     

光电稳定平台框架结构探讨

介绍了机载光电侦察稳定平台的几种框架形式,从稳定原理方面分析了各自的优缺点,并指出随着光电侦察技术及装备的发展,四框架两轴稳定平台系统是最佳的选择方案.     

炮射投掷式通信干扰机作战效能评估

针对炮射投掷式通信干扰机的作战对象,结合工作波段分别计算了单部悬浮式和落地式干扰机的压制区域,并对干扰机的空域覆盖进行了计算机仿真和分析,对投掷式通信干扰机作战运用有一定的指导意义。     

高温交联ETFE材料挤出技术在航空电缆的应用

文章通过对航空导线及麦拉菲尔TEL15XF生产线的介绍，使读者了解国外先进氟树脂线缆生产设备的特点。