查询词典 fault testing

Finally, in order to implement the rotor winding inter turn short circuit fault detection of generator, we set up artificial neural network for the testing of generator rotor inter turn short circuit based on the Artificial Neural Network workbox of MATLAB.

最后应用MATLAB中的神经网络工具箱建立了转子绕组匝间短路探测的人工神经网络模型，以实现对发电机转子绕组匝间短路的探测。

Some methods aiming at the two problems have been researched. First, the optimal number of ATE site can be calculated based on a cost model of DAT-ATE. Second, the problem of test schedule which is equitant with two-dimensional Bin-Packing problem is presented. Then a TCG denotation satisfied with T-admissible rule is more convenient for combinational optimization. With Simulated annealing algorithm, better test scheduling results can be achieved; but there is no great optimization space because the efficiency of scheduling is greater than 90%. Third, A novel test compression method——Multi-capture testing is proposed to compress the stimuli. And the ATPG results show that MC achieves high compression ratio which is greater than 90% in some large-scale circuits. MISR, widely used in LBIST, is employed to compress the responses. The aliasing analysis demonstrates that the fault coverage reduction is little due to the existence of aliasing. Fourth, an improved TIC (called S-TIC) aiming at structured test is proposed based on ARM's TIC. A MC scheduling algorithm is proposed to compute the SoC test time and combine MC vectors to SoC test vectors. The scheduling results shows that test time is greatly reduced when using the proper scheduling priority.

首先，给出了低成本ATE的成本模型，根据此模型得到最低测试成本时系统级测试调度的基本参数——测试Site数；其次，本文将DAT-Scan方式的SoC测试调度等价为两维BP问题，为有效地求解该问题，将该BP问题表示为TCG图并通过模拟退火算法解决其求解过于复杂的问题，调度的结果表明该方法在测试时间上有一定改善，并指出DAT-Scan测试调度效率已经大于90％，进一步优化的空间较小；第三，本文尝试通过测试压缩来解决激励所需的测试带宽，提出了Multi-capture结构并解决了MC测试过程中的&矢量&退化问题，MC测试的ATPG结果表明其测试压缩率很高（大电路接近90％）；第四，在激励获得很高压缩比的情况下，测试响应也需压缩，本文采用LBIST中常用的MISR作为MC测试的响应压缩电路，理论分析和实验结果都证明了MC测试的别名对故障覆盖率影响较小（小于2％），并对两类别名的成因做了具体分析；第五，在MC测试及其响应压缩的基础上，本文改进了ARM公司的测试控制器TIC使之适合于MC测试，为了解决MC测试矢量合成问题，本文抽取了MC测试模型，通过固定优先级的MC测试调度模拟将MC矢量合成为ATE矢量，并模拟出了总的MC测试时间。

The paper puts forward a set of faults diagnosis methods of testing the noise of the three-phase motor current which shows the characteristics of the motor faults, and multi-varieties time series models of the noise is established, the multi-varieties residual series is changed to the monistical as the fault detection index.

提出以测试电机的三相电流噪声为电机故障特征信号的诊断方法，建立电机电流噪声多元时序模型，将时序模型的多元残差序列化为一元序列作为故障总体检测指标。

We put forward firstly a sufficient and necessary condition of one stept fault diagnosablity based on testing each other between the nodes, by means of the maximum independent set theory in graph. It establishes a foundation for the SFD of computer network.

本文首次将图论中的极大独立点集理论用于系统级故障诊断中，获得了一个简明、直观、易操作的，且基于相互测试的判定系统一步t故障可诊断的充要条件，补充了文献[10]的充要条件，并奠定了网络环境下系统级故障诊断研究的基础。

This testing process iterates until a fault is found or all the program execution paths are enumerated.

我们不断重复这两阶段的测式分析，直到找出错误或将程式所有执行路径全数列举完毕。

After emulations of training and testing in MALTAB, the better valid coefficient set of significance value and threshold value can be adopted as knowledge base of neural network. In the fault diagnosis, proceeds positive-going calculation by using the created neural network structure to infer the final result.

在系统具体实现中，采用Visual C++ 6.0进行人机界面和整体控制程序的设计，采用ACCESS 2000进行知识库的建立、维护和其它数据文件的管理，利用Matlab进行神经网络部分的训练、仿真和计算。

The analog fault diagnosis research is one of the forefronts of the testing field, one of the reason is that the reliability of electrical systems depends on that of analog circuits and systems.

模拟系统故障诊断课题是一个广泛研究的前沿课题之一，模拟电路的可靠性决定了电子设备系统的可靠性，具有重要的实际意义。

Established the mathematics model of testing short circuit and single-phase to ground fault in transmit line.

建立了架空线短路、单相接地故障检测的数学模型，设计了装置的硬件和软件，并对装置做了模拟实验和精度测试。

The intelligent cablefault location instrument has many peculiarity by testing fault cable in laboratory ,for examplethe measure range is 0 ～ 60kM, the relative error is smaller than 0.5%. In-systemProgramming logic device which will be useful in debuging the circuit board is used.Measurement date can be displayed by the LDE showing, and it has the USB port supporting"Plug and Play" with electricity, the highest rate is 12Mb/s.

经过模拟电缆电路定点实验得出该测试仪具有以下特点：测量量程为 0～60km，相对误差不大于 0.5%；有利于方便调试的在系统可编程逻辑器件的应用；LED 显示器可动态显示测量结果；USB热插拔通信接口功能，传输最高速率为 12M。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。