Pub Date : 1995-09-05DOI: 10.1109/CCECE.1995.526299
Y. Hegazy, M. Salama
This paper presents a method for analysing the probabilistic behaviour of the randomly varying harmonic currents produced by distribution systems loads. First, a probabilistic model of some distribution system loads is developed. Then, the probability density function of the summation of the real and imaginary components of the harmonic currents is formulated. Simulation results are presented and discussed.
{"title":"Probabilistic modeling of distribution systems loads for harmonic studies","authors":"Y. Hegazy, M. Salama","doi":"10.1109/CCECE.1995.526299","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526299","url":null,"abstract":"This paper presents a method for analysing the probabilistic behaviour of the randomly varying harmonic currents produced by distribution systems loads. First, a probabilistic model of some distribution system loads is developed. Then, the probability density function of the summation of the real and imaginary components of the harmonic currents is formulated. Simulation results are presented and discussed.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116614567","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}
Pub Date : 1995-09-05DOI: 10.1109/CCECE.1995.526413
A. Shaikh, E. Garant, A. Okapuu-von Veh, A. Malowany, A. Daigle, P. Desbiens, J. Rizzi, R. Marceau, R. Gauthier
The importance of training simulators in the power industry has been recognised due to the risks involved for a professional in this field. However more work is needed on the training user interface. The virtual reality (VR) training simulator ESOPE-VR has been developed as a functional VR system which serves as an extension to the traditional simulator. Many issues were confronted during this development. One major issue is the man-machine strategy and interface to be used. This issue is critical since it influences the level of immersion or realism that can be achieved. This paper discusses three different hand controlled manipulation devices, their integration and some test data showing the effectiveness of their manipulation strategies.
{"title":"Alternative manipulation strategies in a virtual reality training system","authors":"A. Shaikh, E. Garant, A. Okapuu-von Veh, A. Malowany, A. Daigle, P. Desbiens, J. Rizzi, R. Marceau, R. Gauthier","doi":"10.1109/CCECE.1995.526413","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526413","url":null,"abstract":"The importance of training simulators in the power industry has been recognised due to the risks involved for a professional in this field. However more work is needed on the training user interface. The virtual reality (VR) training simulator ESOPE-VR has been developed as a functional VR system which serves as an extension to the traditional simulator. Many issues were confronted during this development. One major issue is the man-machine strategy and interface to be used. This issue is critical since it influences the level of immersion or realism that can be achieved. This paper discusses three different hand controlled manipulation devices, their integration and some test data showing the effectiveness of their manipulation strategies.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117176683","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}
Pub Date : 1995-09-05DOI: 10.1109/CCECE.1995.526302
M. El-Kahel, G. Olivier, G. April, C. Guimaraes
This work presents transformers used by a new family of polyphase power convertors having an odd number of phases which is not a multiple of 3. The special feature of these transformers is that the judicious arrangement of their windings ensures an equitable distribution in power semiconductors, making them suitable for heavy-current industrial applications. The structure of these transformers also makes it possible to increase the number of phases of these power convertors, the effect of which is to reduce the DC ripple and the harmonic currents inflicted on the AC supply network.
{"title":"Five- and seven-phase conversion transformers","authors":"M. El-Kahel, G. Olivier, G. April, C. Guimaraes","doi":"10.1109/CCECE.1995.526302","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526302","url":null,"abstract":"This work presents transformers used by a new family of polyphase power convertors having an odd number of phases which is not a multiple of 3. The special feature of these transformers is that the judicious arrangement of their windings ensures an equitable distribution in power semiconductors, making them suitable for heavy-current industrial applications. The structure of these transformers also makes it possible to increase the number of phases of these power convertors, the effect of which is to reduce the DC ripple and the harmonic currents inflicted on the AC supply network.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"81 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134106537","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}
Pub Date : 1995-09-05DOI: 10.1109/CCECE.1995.526411
Jean-Marie Dirand, V. Chevrier, R. González-Rubio
To illustrate the approaches of the Quintus flex/Prolog system and the Nancy University blackboard-based applications generator, the authors undertake a comparison of modules of an expert system for electric transformer design, implemented on the respective development systems. After setting some typical instances in context, they present the different implementations at the levels of knowledge representation, management of control in the reasoning process, and the treatments themselves. The approaches are compared in terms of ease of knowledge modelling and structuring, control of reasoning, and capacity of treatment.
{"title":"Comparative study of two knowledge-based development systems: flex/Prolog and ATOME/LISP","authors":"Jean-Marie Dirand, V. Chevrier, R. González-Rubio","doi":"10.1109/CCECE.1995.526411","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526411","url":null,"abstract":"To illustrate the approaches of the Quintus flex/Prolog system and the Nancy University blackboard-based applications generator, the authors undertake a comparison of modules of an expert system for electric transformer design, implemented on the respective development systems. After setting some typical instances in context, they present the different implementations at the levels of knowledge representation, management of control in the reasoning process, and the treatments themselves. The approaches are compared in terms of ease of knowledge modelling and structuring, control of reasoning, and capacity of treatment.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134161933","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}
Pub Date : 1995-09-05DOI: 10.1109/CCECE.1995.528085
P. Michaud, R. Gonzalez Rubio
The learning capacity of artificial neural nets removes the need to formulate a model or to extract knowledge for the implementation of any correspondence function. On the other hand, the design process calls for a certain number of iterations before one can find the right configuration and learning parameters for use in a given application. To mitigate this difficulty, NEUREX has been designed to consist of an expert system and an artificial neural net simulator. It supervises autonomously the process of design in the same way as would an experienced designer, and is currently in readiness to supervise artificial neural net design using standard backpropagation.
{"title":"NEUREX-an expert system for the autonomous design of artificial neural nets","authors":"P. Michaud, R. Gonzalez Rubio","doi":"10.1109/CCECE.1995.528085","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528085","url":null,"abstract":"The learning capacity of artificial neural nets removes the need to formulate a model or to extract knowledge for the implementation of any correspondence function. On the other hand, the design process calls for a certain number of iterations before one can find the right configuration and learning parameters for use in a given application. To mitigate this difficulty, NEUREX has been designed to consist of an expert system and an artificial neural net simulator. It supervises autonomously the process of design in the same way as would an experienced designer, and is currently in readiness to supervise artificial neural net design using standard backpropagation.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132941863","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}
Pub Date : 1995-09-05DOI: 10.1109/CCECE.1995.528063
N. Landry, J. Chouinard
This article deals with the implementation in hardware and the study of performance of a modem using trellis-coded PSK modulation with a signalling rate of 9.6 kbit.s in the Ka-band. The modems thus designed are used to simulate the transmission of data through a hardware channel simulator with attenuation in the band-pass mode. This can simulate either a Rayleigh channel, a Rician channel or a Loo (1985) channel with lognormal masking and Rayleigh fading. The results are presented in terms of error rate as a function of signal/noise ratio.
{"title":"Implementation of a hardware TCM modem for mobile/satellite telecommunications in the 20 to 30 GHz frequency band","authors":"N. Landry, J. Chouinard","doi":"10.1109/CCECE.1995.528063","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528063","url":null,"abstract":"This article deals with the implementation in hardware and the study of performance of a modem using trellis-coded PSK modulation with a signalling rate of 9.6 kbit.s in the Ka-band. The modems thus designed are used to simulate the transmission of data through a hardware channel simulator with attenuation in the band-pass mode. This can simulate either a Rayleigh channel, a Rician channel or a Loo (1985) channel with lognormal masking and Rayleigh fading. The results are presented in terms of error rate as a function of signal/noise ratio.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133057253","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}
Pub Date : 1995-09-05DOI: 10.1109/CCECE.1995.526308
A. Rahal, R. Bosisio
A stable planar Gunn diode dielectric resonator oscillator (DRO) is reported at 31.4 GHz. The design is based on the measured impedance of the diode under large signal RF excitation. A six port reflectometer is used to measure the device line of the diode under test and the optimum point of operation is defined. In order to realize stable operation a dielectric resonator is used as part of the output matching circuit. The oscillator is realized in MIC technology and shows a 3.8 mW of output power at 31.4 GHz.
{"title":"A stable Ka band planar Gunn diode dielectric resonator oscillator (DRO)","authors":"A. Rahal, R. Bosisio","doi":"10.1109/CCECE.1995.526308","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526308","url":null,"abstract":"A stable planar Gunn diode dielectric resonator oscillator (DRO) is reported at 31.4 GHz. The design is based on the measured impedance of the diode under large signal RF excitation. A six port reflectometer is used to measure the device line of the diode under test and the optimum point of operation is defined. In order to realize stable operation a dielectric resonator is used as part of the output matching circuit. The oscillator is realized in MIC technology and shows a 3.8 mW of output power at 31.4 GHz.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":" 18","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114051282","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}
Pub Date : 1995-09-05DOI: 10.1109/CCECE.1995.526676
M. Macieszczak, M. Ahmad
One of the most essential tasks in the image understanding systems is shape analysis of the binary images. The effectiveness of the shape analysis process requires an accurate description of the shape of the object and an appropriate structure of the input data. In this paper, a new method of the shape equalization is presented. The proposed approach increases the accuracy of the shape description without increasing the complexity of the input information. The method is based on the data interpolation using Fourier descriptors and takes advantage of the statistical properties of the objects found in image scenes. A 1-D filter is used for spatial filtering of the contours.
{"title":"Shape equalization of binary images using Fourier descriptor interpolation in low-level processing for image understanding","authors":"M. Macieszczak, M. Ahmad","doi":"10.1109/CCECE.1995.526676","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526676","url":null,"abstract":"One of the most essential tasks in the image understanding systems is shape analysis of the binary images. The effectiveness of the shape analysis process requires an accurate description of the shape of the object and an appropriate structure of the input data. In this paper, a new method of the shape equalization is presented. The proposed approach increases the accuracy of the shape description without increasing the complexity of the input information. The method is based on the data interpolation using Fourier descriptors and takes advantage of the statistical properties of the objects found in image scenes. A 1-D filter is used for spatial filtering of the contours.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123926556","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}
Pub Date : 1995-09-05DOI: 10.1109/CCECE.1995.526565
J. Salmon, E. Nowicki
This paper presents a 3-phase rectifier topology that superimposes a high frequency switchmode power converter on top of a standard diode rectifier. The switchmode converter uses a 3-phase Y-connected bi-directional switch (3/spl phi/ Y-switch) network and a single switch boost converter to selectively draw a 180 Hz triangular wave current from the 60 Hz AC-line. Due to the mutual coupling of the rectifier DC-link inductors, this current flows back to the AC-side by splitting equally between the upper and lower rectifier DC rails. This current path, together with the current path associated with "standard diode rectifier" operation, produces a high quality sinusoidal line-current waveshape with very low line current harmonic distortion; ideally 4.7%.
{"title":"A 3-phase boost converter for lowering the input current distortion of a VSI drive using mutually coupled DC-link inductors","authors":"J. Salmon, E. Nowicki","doi":"10.1109/CCECE.1995.526565","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526565","url":null,"abstract":"This paper presents a 3-phase rectifier topology that superimposes a high frequency switchmode power converter on top of a standard diode rectifier. The switchmode converter uses a 3-phase Y-connected bi-directional switch (3/spl phi/ Y-switch) network and a single switch boost converter to selectively draw a 180 Hz triangular wave current from the 60 Hz AC-line. Due to the mutual coupling of the rectifier DC-link inductors, this current flows back to the AC-side by splitting equally between the upper and lower rectifier DC rails. This current path, together with the current path associated with \"standard diode rectifier\" operation, produces a high quality sinusoidal line-current waveshape with very low line current harmonic distortion; ideally 4.7%.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127943762","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}
Pub Date : 1995-09-05DOI: 10.1109/CCECE.1995.528105
R. Dworkowski, P. Wojcik
The paper discusses principles of operation and basic design features of the mechanism of a precision laser cutting system, and describes how very high dynamic performance has been achieved. Next, the paper briefly describes the construction and operation of two secondary subsystems: an optical beam delivery subsystem and a fabric transport system. Then, the computer control subsystem, including hardware and software, is discussed in detail. Finally, the paper outlines plans for the future development of the system, which will include two head cutting capability, collision avoidance, and cutting time optimization.
{"title":"Computer control for a high speed, precision laser cutting system","authors":"R. Dworkowski, P. Wojcik","doi":"10.1109/CCECE.1995.528105","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528105","url":null,"abstract":"The paper discusses principles of operation and basic design features of the mechanism of a precision laser cutting system, and describes how very high dynamic performance has been achieved. Next, the paper briefly describes the construction and operation of two secondary subsystems: an optical beam delivery subsystem and a fabric transport system. Then, the computer control subsystem, including hardware and software, is discussed in detail. Finally, the paper outlines plans for the future development of the system, which will include two head cutting capability, collision avoidance, and cutting time optimization.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116001963","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}
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