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[1991 Proceedings] 6th Mediterranean Electrotechnical Conference最新文献

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Modelling and analysis of a bidirectional boost converter with output filter 带输出滤波器的双向升压变换器的建模与分析
[1991 Proceedings] 6th Mediterranean Electrotechnical Conference Pub Date : 1991-05-22 DOI: 10.1109/MELCON.1991.162099
J. Font, L. Martínez
{"title":"Modelling and analysis of a bidirectional boost converter with output filter","authors":"J. Font, L. Martínez","doi":"10.1109/MELCON.1991.162099","DOIUrl":"https://doi.org/10.1109/MELCON.1991.162099","url":null,"abstract":"This work is the result of an analytical investigation of both the steady-state and the small-signal behavior of a bidirectional boost converter with output filters controlled by PWM (pulse width modulation). Due to the bidirectional current capability of the switch, the discontinuous conduction mode does not occur, leading to a simple analytic description of the switching converter. The small-signal model is derived in the form of both control-to-output and input-to-output transfer functions using the state-space averaging method. As a result, fourth-order and nonminimum-phase characteristics are obtained.<<ETX>>","PeriodicalId":193917,"journal":{"name":"[1991 Proceedings] 6th Mediterranean Electrotechnical Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121833667","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: 8
Determination of tight upper execution time bounds for tasks in hard real-time environments 确定硬实时环境中任务的严格执行时间上限
[1991 Proceedings] 6th Mediterranean Electrotechnical Conference Pub Date : 1991-05-22 DOI: 10.1109/MELCON.1991.162027
W. Halang, M. Colnaric
{"title":"Determination of tight upper execution time bounds for tasks in hard real-time environments","authors":"W. Halang, M. Colnaric","doi":"10.1109/MELCON.1991.162027","DOIUrl":"https://doi.org/10.1109/MELCON.1991.162027","url":null,"abstract":"The timing predictability of hard real-time systems can only be assured if every component behaves deterministically. Various system design issues are stressed, from system and processor architecture to language and exception handling. In the field of architecture, some design recommendations are given and a timing predictability study of microprocessors is carried out. For certain topics in these fields, solutions to avoid nondeterminism are proposed.<<ETX>>","PeriodicalId":193917,"journal":{"name":"[1991 Proceedings] 6th Mediterranean Electrotechnical Conference","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114054236","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: 1
Solid state regulator/charger for low power PV systems 用于低功率光伏系统的固态调节器/充电器
[1991 Proceedings] 6th Mediterranean Electrotechnical Conference Pub Date : 1991-05-22 DOI: 10.1109/MELCON.1991.161837
K. Nigim, M. Ju'Beh
{"title":"Solid state regulator/charger for low power PV systems","authors":"K. Nigim, M. Ju'Beh","doi":"10.1109/MELCON.1991.161837","DOIUrl":"https://doi.org/10.1109/MELCON.1991.161837","url":null,"abstract":"The different types of electronic regulator battery chargers employed in low-rating solar-powered lighting systems are discussed. A low-power photovoltaic (PV) lighting unit was built and tested which includes a basic constant-current series regulator interfacing with the PV module and the storage battery. The system is especially designed for use in remote areas to serve small farming communities. The system has proved to be practical, low in cost, and reliable.<<ETX>>","PeriodicalId":193917,"journal":{"name":"[1991 Proceedings] 6th Mediterranean Electrotechnical Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122521927","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
The probability of error performance of Reed-Solomon codes over q-ary nonsymmetric channels Reed-Solomon码在q位非对称信道上的错误性能概率
[1991 Proceedings] 6th Mediterranean Electrotechnical Conference Pub Date : 1991-05-22 DOI: 10.1109/MELCON.1991.161912
H. A. Rajab, M.D. Yucel
{"title":"The probability of error performance of Reed-Solomon codes over q-ary nonsymmetric channels","authors":"H. A. Rajab, M.D. Yucel","doi":"10.1109/MELCON.1991.161912","DOIUrl":"https://doi.org/10.1109/MELCON.1991.161912","url":null,"abstract":"The performance of the binary symmetric channel (BSC) together with an RS code over GF(q) is assessed and compared to that of a q-ary symmetric channel (QSC) used with the same code. The results indicate that, with coding, the loss in performance of BSC as compared to that of QSC, remains within 20% of the uncoded case as far as the error probability performance is concerned. Therefore, taking bandwidth considerations into account, the performance of the BSC becomes superior to that of QSC, where in the latter case bandwidth requirements asymptotically grow to infinity with increasing q.<<ETX>>","PeriodicalId":193917,"journal":{"name":"[1991 Proceedings] 6th Mediterranean Electrotechnical Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121794941","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: 1
Presentation of two optimal controllers 两个最优控制器的介绍
[1991 Proceedings] 6th Mediterranean Electrotechnical Conference Pub Date : 1991-05-22 DOI: 10.1109/MELCON.1991.161975
I. Škrjanc, D. Matko, A. Schumann
{"title":"Presentation of two optimal controllers","authors":"I. Škrjanc, D. Matko, A. Schumann","doi":"10.1109/MELCON.1991.161975","DOIUrl":"https://doi.org/10.1109/MELCON.1991.161975","url":null,"abstract":"A comparison is made between a continuous-time generalized predictive controller (CGPC) and a linear quadratic Gaussian (LQG) controller. The nonzero set-point LQG controller is designed under the assumption that the system to be controlled is modeled without error and that any system disturbances are white random processes. However, the basic LQG regulator may be inadequate when these conditions are violated. Control system performance then may be improved by adding new states to the closed-loop system (i.e., by providing dynamic compensation). The nonzero set-point LQG controller can be combined with the continuous-time identification procedure in adaptive control schemes. Simulation results illustrate the proposed controller design procedure.<<ETX>>","PeriodicalId":193917,"journal":{"name":"[1991 Proceedings] 6th Mediterranean Electrotechnical Conference","volume":"482 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116527723","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
A gradient-directed adaptive algorithm for synchrotron radiation angiography 同步辐射血管造影的梯度定向自适应算法
[1991 Proceedings] 6th Mediterranean Electrotechnical Conference Pub Date : 1991-05-22 DOI: 10.1109/MELCON.1991.161949
S. Carrato, G. L. Sicuranza
{"title":"A gradient-directed adaptive algorithm for synchrotron radiation angiography","authors":"S. Carrato, G. L. Sicuranza","doi":"10.1109/MELCON.1991.161949","DOIUrl":"https://doi.org/10.1109/MELCON.1991.161949","url":null,"abstract":"An adaptive algorithm for the processing of digital subtraction angiographies obtained via synchrotron radiation is presented. In order to enhance the coronary arteries hidden by the heart chambers and the aorta, an adaptive high-pass filter is used. For each pixel of the image, the size of the filter is chosen according to the value of a gradient operator, which is computed over a large window centered on the same pixel. The algorithm has been successfully tested on some synthetic images and an image taken from a human subject.<<ETX>>","PeriodicalId":193917,"journal":{"name":"[1991 Proceedings] 6th Mediterranean Electrotechnical Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128054974","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 positional control with an induction actuator by using a PID controller associated with field orientation 鲁棒位置控制与感应驱动器使用PID控制器与磁场方向相关联
[1991 Proceedings] 6th Mediterranean Electrotechnical Conference Pub Date : 1991-05-22 DOI: 10.1109/MELCON.1991.162090
H. Buyse, F. Labrique, B. Robyns, P. Sente
{"title":"Robust positional control with an induction actuator by using a PID controller associated with field orientation","authors":"H. Buyse, F. Labrique, B. Robyns, P. Sente","doi":"10.1109/MELCON.1991.162090","DOIUrl":"https://doi.org/10.1109/MELCON.1991.162090","url":null,"abstract":"A robust digital positional control system is presented for small power induction actuators. A simple control algorithm is obtained by performing field orientation through an estimated linearizing state feedback, avoiding any measurement or estimation of the rotor flux. The hardware implementation is organized around two 8-b microcontrollers and needs only a digital position encoder as the sensor. The good performance of the system has been validated by simulation and experiments on a laboratory prototype.<<ETX>>","PeriodicalId":193917,"journal":{"name":"[1991 Proceedings] 6th Mediterranean Electrotechnical Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133963566","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
Measurement transmission in power control centers 电力控制中心的测量传输
[1991 Proceedings] 6th Mediterranean Electrotechnical Conference Pub Date : 1991-05-22 DOI: 10.1109/MELCON.1991.162015
J. Luque, J. I. Escudero
{"title":"Measurement transmission in power control centers","authors":"J. Luque, J. I. Escudero","doi":"10.1109/MELCON.1991.162015","DOIUrl":"https://doi.org/10.1109/MELCON.1991.162015","url":null,"abstract":"A protocol is presented for reducing the impact of repetitively sending many values. The results of its application to an actual system are presented. These results can be extended to other distributed control systems.<<ETX>>","PeriodicalId":193917,"journal":{"name":"[1991 Proceedings] 6th Mediterranean Electrotechnical Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132234442","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: 4
Trellis-coded 8-DPSK with postdetection combining diversity for digital land mobile radio 栅格编码8-DPSK与后检组合分集的数字陆地移动无线电
[1991 Proceedings] 6th Mediterranean Electrotechnical Conference Pub Date : 1991-05-22 DOI: 10.1109/MELCON.1991.161909
G. Femenias, R. Agustí
{"title":"Trellis-coded 8-DPSK with postdetection combining diversity for digital land mobile radio","authors":"G. Femenias, R. Agustí","doi":"10.1109/MELCON.1991.161909","DOIUrl":"https://doi.org/10.1109/MELCON.1991.161909","url":null,"abstract":"The performance of rate 2/3 postdetection combining diversity TCM-8DPSK systems is analyzed. A simulated Rayleigh mobile radio channel and the presence of cochannel interferers are assumed. Only the case where an ideal interleaving/deinterleaving process is used to further combat the Rayleigh fading is considered. Bit error rate (BER) is obtained through computer simulation as a function of signal-to-noise ratio (SNR) and carrier-to-interference average power ratio. Results obtained for the QDPSK and TCM-8DPSK schemes are considered as a reference to determine the performance improvements introduced by the coding diversity set-up.<<ETX>>","PeriodicalId":193917,"journal":{"name":"[1991 Proceedings] 6th Mediterranean Electrotechnical Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132246019","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
Thick film fin-line isolators for the R-band 厚膜鳍线隔离器用于r波段
[1991 Proceedings] 6th Mediterranean Electrotechnical Conference Pub Date : 1991-05-22 DOI: 10.1109/MELCON.1991.161801
L. Zivanov, P. Nikolić, O. Aleksic
{"title":"Thick film fin-line isolators for the R-band","authors":"L. Zivanov, P. Nikolić, O. Aleksic","doi":"10.1109/MELCON.1991.161801","DOIUrl":"https://doi.org/10.1109/MELCON.1991.161801","url":null,"abstract":"Ba-hexaferrite isolators have been made for the R-band using the finline technique. As far as is known this is the first time these isolators were made using a thick film of Ba-hexaferrite and mounted in the E-plane of a metal wave guide housing. The preparation of a thick film of ferrimagnetic paste using Ba-hexaferrite powder containing 5 wt.% glass is described. A low-cost, simple screen-printed process for deposition of hexaferrite films on an Al/sub 2/O/sub 3/ substrate was used. The transmission properties of these isolators were measured. The frequency ranges were determined where the isolation was more than 20 dB. The experimental results show that it is possible to make these devices without using an external magnet because hexaferrites can simulate the effect of a large external bias field.<<ETX>>","PeriodicalId":193917,"journal":{"name":"[1991 Proceedings] 6th Mediterranean Electrotechnical Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134488886","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
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