基于类PCM结构过程的试飞多科目iNET处理技术

飞行试验网络化iNET测试系统正逐渐取代传统的PCM测试系统,成为当前飞行试验测试系统的主要架构;网络化iNET测试系统下对多科目数据处理提出了更高的要求,针对试验多科目数据处理的特点,文章提出了一种基于类PCM结构中间存储的多科目数据处理方法,借鉴成熟的PCM组帧技术和解析方法,打破传统试验多科目处理模式,提高了多科目处理效率,解决了海量试验数据多科目处理难题,满足了现代飞行试验多科目快速处理需求。     

基于Modbus/TCP的配电网自动化远方终端设计

为了提高对现代雷达系统的故障诊断能力,开发了一种融合在雷达系统内部的嵌入式测试系统;系统通过在雷达内部布设测试设备,设置故障监测点和加入测试信号,对雷达各部分的工作状态、性能进行监测,用于雷达系统的性能检测和故障诊断,缩短平均维修时间（MTTR）; 硬件选用精密的测量仪器和先进的总线通讯技术保证测试精度,软件采用先进的算法,融合了加电BIT、周期BIT和维护BIT等测试手段,保证故障隔离的准确,该系统已在多种雷达系统中得到成功的应用。     

飞行试验大数据技术及展望

现代航空武器装备综合化和信息化程度越来越高,飞行试验测试数据的种类增多,测试数据量剧增,飞行试验进入了大数据时代。试飞大数据的来临,对试验数据的获取、记录、传输和处理等传统技术及模式产生了强大的冲击,也提出了严峻的挑战。本文在简要介绍大数据概念及国外研究应用现状的基础上,通过总结分析飞行试验数据的新特征、新需求,提出了“试飞大数据”的概念,得出飞行试验数据是典型大数据的结论;按照试飞测试流程和大数据技术范畴,重点分析了试飞大数据技术中的数据获取、交换、记录、传输、监控、处理、存储等关键技术,最后,对试飞大数据技术的应用前景进行了展望。     

试飞数据分析结果的可视化输出软件设计与实现

针对试飞数据分析结果进行可视化输出可以提高试飞科目的评判效率。将试飞数据分析结果进行结构化存储,采用列模式内存对齐方式,提高单个参数的检索查询及图形输出操作效率;对C+ builder标准组件类属性及方法进行扩充,实现对常规和特殊定制结果曲线图的绘制导出;利用进程调用方式,融合Matlab平台GUI应用程序和算法库,扩展软件交互功能。以实现对试飞数据分析结果的可视化输出。     

一种车用单刀双掷开关的质检仪器研发

介绍了一种车用单刀双掷开关质量检测仪器的研发,包括检测系统的硬件设计、检测原理以及算法软件开发。首先,根据单刀双掷开关的工作原理及质量检测要求,开发了检测手指触觉压力的机械装置,以及控制开关通道切换的继电器控制电路;在此基础上,开发了相应的检测算法,可实现对开关切换状态、电压差以及手指触觉压力进行自动化的数据采集、分析、检测和判断,从而挑选出合格的开关;最后,设计了触屏人机交互界面,可实时显示产品检测的参数。该检测设备在某自动化生产线上经过近一年时间的检测验证,证明系统运行平稳,检测效果良好、误检率低,可以完全取代传统的人工检测方式,提高了开关的检测效率,降低了检测人员的工作量。     

基于遗传算法的自动驾驶仪测试性分析

为了提高自动驾驶仪故障测试与诊断的快速性与准确性,提出了一种基于遗传算法的自动驾驶仪测试性分析方法;此方法解决了遗传算法应用于测试项目选择的难点,构建了最优的故障测试策略,能以最短时间完成测试并满足测试覆盖性的要求;利用故障测试获得的知识,简化故障与测试间的相关性矩阵,加快了故障诊断的速度;最终获得了故障测试与诊断一体化的方法;实验结果表明,此方法有效提高了故障测试与诊断的速度,并且易于实现。     

综合传动装置起动扭矩测试试验研究

低温环境起动性能是表征车辆动力性能的一项重要指标。对液力机械传动车辆而言,由于综合传动装置自身技术特点,改善车辆起动性能除应当考虑发动机自身起动阻力外,还应当考虑综合传动装置的起动阻力。在系统分析综合传动装置技术特点和功率流向的基础上,总结了发动机起动过程的主要特征,提出采用稳态试验与动态试验相结合的台架试验方法进行综合传动装置起动扭矩测试。以某高速履带车辆为研究对象,进行了综合传动装置起动扭矩测试。试验结果表明,传动油温的变化和各类油泵的功率消耗是决定综合传动装置起动扭矩大小的关键因素,为改进车辆总体设计和提高车辆起动性能提供了依据。     

Adaptive discretization for signal detection in statistical inverse problems

We discuss statistical tests in inverse problems when the original equation is replaced by a discretized one, i.e. a linear system of equations. Previous studies revealed that using the discretization level as regularizing procedure is possible, but its application is limited unless discretization is restricted to the singular value decomposition, see C. Marteau and P. Mathé, General regularization schemes for signal detection in inverse problems, 2013. General linear regularization may circumvent this, and we propose a regularization of the discretized equations. The discretization level may be chosen adaptively, which may save computational budget. This results in tests which are known to yield the optimal separation rate up to some constant in many cases.     

LLRF超导腔体控制系统的测试

中国科学院近代物理研究所自主研发的ADS注入器Ⅱ第一代高频低电平(LLRF)控制系统,工作频率为162.5 MHz;LLRF系统是由基于I/Q采样的正交解调技术构成的全数字闭环反馈控制系统,其主要功能是实现超导腔腔体电压幅值稳定控制、相位稳定控制与腔体谐振频率控制;LLRF控制系统在液氦温区超导腔上进行了系统稳定度和性能的在线测试,根据实验数据计算得超导腔体电压幅度稳定度为±3.4‰,相位稳定度为±0.3°,腔体表面峰值电场(Epk)能长时间稳定在25.1 MV/m。通过实验测试,检验了LLRF控制系统的性能,并对测试过程中出现的问题进行了分析,为将来超导腔LLRF控制系统运行积累了经验。     

A new high frequency dynamic mechanical analysis system: An approach to direct high frequency testing of tire tread rubber

Dynamic Mechanical Analysis (DMA) systems are measurement devices for obtaining master curves and complex modules of viscoelastic materials, such as rubbers. The conventional DMAs measurement systems in market have several limitations, which restrict their ability for operating at high frequencies. Thus, Williams, Landel and Ferry (WLF) relation is used to produce master curves and predict the material properties at high frequencies. In conventional DMAs, experiments are done in a range of temperatures, and then a master curve is made for a chosen reference temperature by shifting the measurements data to high frequencies. Therefore, the obtained results, which are not based on direct measurements, can be inaccurate. In order to overcome this problem a new simple shear high-frequency DMA (HFDMA) system is designed and built to directly measure the dynamic mechanical properties of viscoelastic material at high frequencies and the strain levels sufficient for tire manufacturers. The new HFDMA can be used to test any viscoelastic materials which have glass transmission temperature (Tg) lower than room temperature (about 23 °C) such as the Styrene-butadiene rubber (SBR). The SBR is the base material for tire tread. The designing process of this new HFDMA is presented in this paper. The rubber specimen shape is chosen by taking into account the shear elastic wave effect, bending, buckling effect and heat generation in the specimen. The repeatability test is accomplished to ensure that the results obtained from the new HFDMA are repeatable and the repeatability uncertainty is about 0.04%. The new HFDMA is validated by comparing to the direct test results of conventional DMA at 100 Hz. The direct high frequency (5 kHz) complex shear modulus and damping factor are compared with the master curve of the conventional DMA developed by the use of WLF relation for SBR. This comparison revealed that the complex shear modulus and damping factor of the SBR obtained from the HFDMA at 5 kHz and 0.05% strain amplitude are about 7% and 6.5% higher than those obtained from the conventional DMA, respectively.