2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE)最新文献_第2页

Operation in asynchronous overload of synchronous motor. Effect of damping windings 同步电机异步过载运行。阻尼绕组的影响

2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE) Pub Date : 2017-10-01 DOI: 10.1109/ISEEE.2017.8170625

A. Câmpeanu, S. Enache, I. Vlad, M. Enache

引用次数: 1

Establishing electromagnetic torque in brushless direct current motors by numerical methods 用数值方法建立无刷直流电机的电磁转矩

2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE) Pub Date : 2017-10-01 DOI: 10.1109/ISEEE.2017.8170655

I. Vlad, A. Câmpeanu, S. Enache, M. Enache

{"title":"Establishing electromagnetic torque in brushless direct current motors by numerical methods","authors":"I. Vlad, A. Câmpeanu, S. Enache, M. Enache","doi":"10.1109/ISEEE.2017.8170655","DOIUrl":"https://doi.org/10.1109/ISEEE.2017.8170655","url":null,"abstract":"Progresses obtained in command and power electronics have increased the technical and economic performances of brushless direct current motors. Consequently, the problem of optimum design and operation of these motors, frequently used for driving small vehicles, is a very present one. Studies presented in literature show that high oscillations of torque occur in these motors in a complete rotation. That is why, the research carried out and the simulations presented aim at identifying the slots producing high torques, respectively low torques, in a complete rotation, thus justifying the oscillations. The conclusion emerged has been that the optimum variant of maximum torque implies supplying the brushless direct current motor with six pulses per period in direct direction, also indicating the value of the command angle. The most unfavourable situation, of low torque and high oscillations, occurs in case of supply with three pulses per period and reverse sequence of phases. In this case, the average value of the torque decreases by 56.7% as against the optimum machine. Eliminating oscillations in this type of motor in not possible, but an optimal design can reduce them much.","PeriodicalId":276733,"journal":{"name":"2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133117082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robust control of a single-ended primary-inductor converter (SEPIC) 单端初级电感变换器(SEPIC)的鲁棒控制

2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE) Pub Date : 2017-10-01 DOI: 10.1109/ISEEE.2017.8170665

Roushan Rezvani Arany, A. Bratcu

引用次数: 2

Aspects of image compression using neural networks for visual servoing in robot control 图像压缩方面利用神经网络进行机器人视觉伺服控制

2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE) Pub Date : 2017-10-01 DOI: 10.1109/ISEEE.2017.8170627

V. Nicolau, G. Petrea, M. Andrei

引用次数: 2

Optimization of GPU and CPU acceleration for neural networks layers implemented in python 优化GPU和CPU加速的神经网络层实现在python

2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE) Pub Date : 2017-10-01 DOI: 10.1109/ISEEE.2017.8170680

R. Dogaru, I. Dogaru

{"title":"Optimization of GPU and CPU acceleration for neural networks layers implemented in python","authors":"R. Dogaru, I. Dogaru","doi":"10.1109/ISEEE.2017.8170680","DOIUrl":"https://doi.org/10.1109/ISEEE.2017.8170680","url":null,"abstract":"Many neural architectures including RBF, SVM, FSVC classifiers, or deep-learning solutions require the efficient implementation of neurons layers, each of them having a given number of m neurons, a specific set of parameters and operating on a training or test set of N feature vectors having each a dimension n. Herein we investigate how to allocate the computation on GPU kernels and how to better optimize the problem parameters (neural structure and training set size) as well as the GPU parameters in order to maximize the acceleration (relative to a CPU implementation). It is shown that by maximizing the load (number of threads on each computational GPU core) and by a proper allocation of the GPU global memory, very large speedups (100–250 times) with respect to the CPU implementation can be achieved while using the convenient NUMBA Python package supporting CUDA programming of GPU. Consequently, it is shown that given a problem to be posed to a neural network a convenient decomposition of the network can be done in order to allocate optimally the parts of the computation to the GPU in order to maximize efficiency. Also, for CPU implementations it was found that Intel's MKL library (called from NUMPY package) can offer efficient implementation of neural layers, comparable to what is achieved using GPU.","PeriodicalId":276733,"journal":{"name":"2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115529354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

The square root method for terminal voltage adjustment in a self-excited synchronous generator 自激同步发电机端电压调整的平方根法

2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE) Pub Date : 2017-10-01 DOI: 10.1109/ISEEE.2017.8170633

Spunei Elisabeta, Piroi Ion, A. Dorian, Piroi Florina

引用次数: 1

Time of flight estimation in multi-path dispersive configuration using compressive sensing reconstruction in the warped domain 基于扭曲域压缩感知重构的多径色散构型飞行时间估计

2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE) Pub Date : 2017-10-01 DOI: 10.1109/ISEEE.2017.8170703

A. Digulescu, I. Candel, C. Ioana

{"title":"Time of flight estimation in multi-path dispersive configuration using compressive sensing reconstruction in the warped domain","authors":"A. Digulescu, I. Candel, C. Ioana","doi":"10.1109/ISEEE.2017.8170703","DOIUrl":"https://doi.org/10.1109/ISEEE.2017.8170703","url":null,"abstract":"In this paper, we present a new approach of time of flight (TOF) estimation using wide band signals, based on compressive sensing (CS) reconstruction in warped domain. In real conditions, constraints related to signal's transmitting/receiving (such as the transducers configuration or the experimental setup) can affect the informational content of the signal. Thus, the received signals need content reconstruction before the parameters estimation (generally based on matched filtering). In the current study, we are interested to improve such waves TOF estimation between two transducers (a transmitter and a receiver) that are not perfectly aligned, due either to the initial experimental setup or to the vibrations in operational conditions. The misalignments of transmitter-receiver transducers introduce interferences since the propagation environment will have several propagation dispersive paths in terms of the received signals. This multipath propagation environment will conduct to interferences and, then, to the partial samples loss. In order to recover the missing samples, the proposed signal reconstruction method uses firstly a time axis (warping) transformation of the signal. The aim of time axis transformation is to turn any non-linear frequency modulation into a stationary signal in the warped domain. In this transformed domain, the CS concept is used to recover the missing spectral components. Then, an unwrapping function enables to express the recovered signal into the original time domain. We prove that the matched filter-based acoustic wave TOF estimation from the reconstructed signal is more accurate than using the original received signal.","PeriodicalId":276733,"journal":{"name":"2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124305704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advanced measurement systems for vibration signals 先进的振动信号测量系统

2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE) Pub Date : 2017-10-01 DOI: 10.1109/ISEEE.2017.8170704

D. Cioboata, A. Abalaru, D. Stanciu, Logofătu Cristian, D. Aiordachioaie

引用次数: 0

Power losses on overhead lines under various loading regimes and weather conditions 在各种负载和天气条件下架空线路的功率损耗

2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE) Pub Date : 2017-10-01 DOI: 10.1109/ISEEE.2017.8170656

I. Băran, M. Costea, T. Leonida

引用次数: 3

Performance and limits of boost rectifiers with unity power factor 单位功率因数升压整流器的性能及限制

2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE) Pub Date : 2017-10-01 DOI: 10.1109/ISEEE.2017.8170640

M. Popescu, A. Bitoleanu, M. Linca, Oana Puncea

引用次数: 0