Pub Date : 1995-09-05DOI: 10.1109/CCECE.1995.528119
F. Danilo, H. Leib
We derive suboptimal noncoherent detection structures for multipath fading channels when the multipath delays are assumed to be known but unresolved. The quadratic decorrelation receiver (QDR), a structure that is derived from fundamental principles, consists of an orthogonalization (or decorrelation) stage and then implements a resolved multipath channel decision rule. Single pulse performance over two paths Rayleigh and two paths mixed mode Ricean/Rayleigh fading channels for binary DPSK and binary FSK respectively are considered. This paper shows that it is possible to have diversity-like gains over multipath fading channels with unresolved components even if the channel is not fully tracked. The decorrelation stage of the receiver is crucial for improving performance when the multipath is unresolved.
{"title":"Quadratic decorrelation receiver for unresolved multipath fading channels","authors":"F. Danilo, H. Leib","doi":"10.1109/CCECE.1995.528119","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528119","url":null,"abstract":"We derive suboptimal noncoherent detection structures for multipath fading channels when the multipath delays are assumed to be known but unresolved. The quadratic decorrelation receiver (QDR), a structure that is derived from fundamental principles, consists of an orthogonalization (or decorrelation) stage and then implements a resolved multipath channel decision rule. Single pulse performance over two paths Rayleigh and two paths mixed mode Ricean/Rayleigh fading channels for binary DPSK and binary FSK respectively are considered. This paper shows that it is possible to have diversity-like gains over multipath fading channels with unresolved components even if the channel is not fully tracked. The decorrelation stage of the receiver is crucial for improving performance when the multipath is unresolved.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"63 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":"129784590","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.1995.528130
S. Vaez, V. I. John
In this paper minimum loss operation of interior permanent magnet motor drives for electric vehicle applications is studied. Motor parameter variations caused by saturation and other factors are taken into account. Motor efficiency and loss at minimum loss operation with and without parameter variations are compared over a standard electric vehicle driving cycle. It is shown that a significant energy saving is possible in the latter case.
{"title":"Minimum loss operation of PM motor drives","authors":"S. Vaez, V. I. John","doi":"10.1109/CCECE.1995.528130","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528130","url":null,"abstract":"In this paper minimum loss operation of interior permanent magnet motor drives for electric vehicle applications is studied. Motor parameter variations caused by saturation and other factors are taken into account. Motor efficiency and loss at minimum loss operation with and without parameter variations are compared over a standard electric vehicle driving cycle. It is shown that a significant energy saving is possible in the latter case.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"218 11 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":"129817933","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.1995.526304
S. Renou, H. Akhrif, L. Saydy
An algorithm for the adjustment of a two-variable controller of proportional-integral or other type is presented. The method is based on a characterisation of the set of gains which enable a system to be stabilised with respect to a region of the complex plane. This characterisation is achieved with the aid of guardian applications and then used as a constraint in an optimisation problem which incorporates certain of the specifications of temporal response to a step.
{"title":"Overall characterisation and gain adjustment of a PI controller with the aid of guardian applications","authors":"S. Renou, H. Akhrif, L. Saydy","doi":"10.1109/CCECE.1995.526304","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526304","url":null,"abstract":"An algorithm for the adjustment of a two-variable controller of proportional-integral or other type is presented. The method is based on a characterisation of the set of gains which enable a system to be stabilised with respect to a region of the complex plane. This characterisation is achieved with the aid of guardian applications and then used as a constraint in an optimisation problem which incorporates certain of the specifications of temporal response to a step.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"2 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":"129050636","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.1995.526596
P. Dumouchel, D. O'Shaughnessy
We propose to use a stochastic segmental intensity model independent of the HMM model in INRS's large vocabulary continuous speech recognizer. First, we examine how to insert this model into the search algorithm without violating the optimality constraints of this algorithm. Second, we propose and test the performance of four different intensity models. The training and testing of the models is done on a studio quality speaker-dependent speech corpus. The first model is a Gaussian mixture phone intensity model independent of the phonemic context. The second model is a Gaussian mixture phone intensity model dependent on the right or left phoneme context. The third model is a Gaussian mixture intensity model based on the variation of intensity within a diphone. Finally, the last model consists of a stochastic silence-speech detector. Performance comparisons show that the best model uses Gaussian mixture of the variation of intensity within a diphone (third model). This model improves the percentage of word recognition from 89.58% (no intensity modeling) to 90.92%.
{"title":"Segmental intensity and HMM modeling","authors":"P. Dumouchel, D. O'Shaughnessy","doi":"10.1109/CCECE.1995.526596","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526596","url":null,"abstract":"We propose to use a stochastic segmental intensity model independent of the HMM model in INRS's large vocabulary continuous speech recognizer. First, we examine how to insert this model into the search algorithm without violating the optimality constraints of this algorithm. Second, we propose and test the performance of four different intensity models. The training and testing of the models is done on a studio quality speaker-dependent speech corpus. The first model is a Gaussian mixture phone intensity model independent of the phonemic context. The second model is a Gaussian mixture phone intensity model dependent on the right or left phoneme context. The third model is a Gaussian mixture intensity model based on the variation of intensity within a diphone. Finally, the last model consists of a stochastic silence-speech detector. Performance comparisons show that the best model uses Gaussian mixture of the variation of intensity within a diphone (third model). This model improves the percentage of word recognition from 89.58% (no intensity modeling) to 90.92%.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"2 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":"130205131","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.1995.528134
D. Grenier, L. Dessaint, O. Akhrif, B. Le Pioufle
A linearisation of the model is proposed for control of a salient-pole synchronous machine. Unlike classical modelling, it makes no a priori hypothesis on the relative orientation of the stator and rotor fields. This linearisation enables control laws to be written which, using the effect of salience in the generation of torque, optimise the efficiency of the machine and also increase the maximum value of instantaneous torque. Results of simulation are presented for a machine with sinusoidal flux distribution. These are compared with the results for nonlinear control where the "direct" current component (i/sub d/) is maintained at a null value.
{"title":"Nonlinear torque control using the effect of salience in a synchronous motor","authors":"D. Grenier, L. Dessaint, O. Akhrif, B. Le Pioufle","doi":"10.1109/CCECE.1995.528134","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528134","url":null,"abstract":"A linearisation of the model is proposed for control of a salient-pole synchronous machine. Unlike classical modelling, it makes no a priori hypothesis on the relative orientation of the stator and rotor fields. This linearisation enables control laws to be written which, using the effect of salience in the generation of torque, optimise the efficiency of the machine and also increase the maximum value of instantaneous torque. Results of simulation are presented for a machine with sinusoidal flux distribution. These are compared with the results for nonlinear control where the \"direct\" current component (i/sub d/) is maintained at a null value.","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":"131662843","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.1995.528141
J. de Carufel, D. Necsulescu
In this paper we propose to use model predictive control (MPC) for the impact/contact motion control of a robot manipulator. The advantages of MPC when changes occur in the dynamical structure of a controlled system are investigated. The contact model used, derived from contact mechanics, includes a dynamic model of friction exhibiting stick-slip. The nonlinear MPC implementation is demonstrated with simulation results.
{"title":"Model predictive control for impact-contact motion of a manipulator","authors":"J. de Carufel, D. Necsulescu","doi":"10.1109/CCECE.1995.528141","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528141","url":null,"abstract":"In this paper we propose to use model predictive control (MPC) for the impact/contact motion control of a robot manipulator. The advantages of MPC when changes occur in the dynamical structure of a controlled system are investigated. The contact model used, derived from contact mechanics, includes a dynamic model of friction exhibiting stick-slip. The nonlinear MPC implementation is demonstrated with simulation results.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"1 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":"129244920","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.1995.528184
D. Stuerga, H. Renaudin, F. Henri, M. Delmotte, M. Lallemant
The technique presented exploits the absorptive capacity of a plate and especially its ability to convert electromagnetic energy integrally into a thermal form, so that low power levels of irradiation suffice to produce heating which can be detected by infrared thermography (less than 1 W). The infrared camera could be positioned directly opposite the output of the open waveguide covered by the plate. The total absence of reflectivity ensures that the presence of the plate induces no interference. The technique is of exemplary simplicity since it can be used on industrial applicators without an anechoic chamber or other special environment.
{"title":"Visualisation of the electric fields in the core of a waveguide","authors":"D. Stuerga, H. Renaudin, F. Henri, M. Delmotte, M. Lallemant","doi":"10.1109/CCECE.1995.528184","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528184","url":null,"abstract":"The technique presented exploits the absorptive capacity of a plate and especially its ability to convert electromagnetic energy integrally into a thermal form, so that low power levels of irradiation suffice to produce heating which can be detected by infrared thermography (less than 1 W). The infrared camera could be positioned directly opposite the output of the open waveguide covered by the plate. The total absence of reflectivity ensures that the presence of the plate induces no interference. The technique is of exemplary simplicity since it can be used on industrial applicators without an anechoic chamber or other special environment.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"1 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":"129254597","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.1995.528117
Musaab Hasan
The Galois field division is a complex arithmetic operation. The corresponding division-and-accumulation (DAA) is not only complex but also time consuming operation. The DAA operation over GF(2/sup m/) is considered, and its algorithms and architectures are presented. The algorithms can be modified not to require any division at all. The architectures can support pipeline and multi-level DAAs resulting in an increased throughput without a proportional increase in the hardware.
{"title":"Division-and-accumulation in GF(2/sup m/)","authors":"Musaab Hasan","doi":"10.1109/CCECE.1995.528117","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528117","url":null,"abstract":"The Galois field division is a complex arithmetic operation. The corresponding division-and-accumulation (DAA) is not only complex but also time consuming operation. The DAA operation over GF(2/sup m/) is considered, and its algorithms and architectures are presented. The algorithms can be modified not to require any division at all. The architectures can support pipeline and multi-level DAAs resulting in an increased throughput without a proportional increase in the hardware.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"113 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":"123319762","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.1995.526292
Y. Chow, M. M. Elsherbiny, M. Salama
The fast Galerkin's moment method is used to calculate the resistance and the surface voltages of power network grounding systems which consist of a grid and rodbed. Each conductor in the grounding system is considered as one segment. The outgoing current from each conductor is assumed to be uniform along the conductor. The accuracy of the resistance calculation is very high. However, for surface voltage calculations, the voltage at the boundary has to be satisfied to yield high accuracy. In the present paper, the authors have proved that no more than two extra segments at the end of each conductor are needed to correct for the assumed current distribution. This modification yielded accurate surface voltage, with average error <5%.
{"title":"Earth surface voltages at a grounding system of buried grid and rods from the fast Galerkin's moment method","authors":"Y. Chow, M. M. Elsherbiny, M. Salama","doi":"10.1109/CCECE.1995.526292","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526292","url":null,"abstract":"The fast Galerkin's moment method is used to calculate the resistance and the surface voltages of power network grounding systems which consist of a grid and rodbed. Each conductor in the grounding system is considered as one segment. The outgoing current from each conductor is assumed to be uniform along the conductor. The accuracy of the resistance calculation is very high. However, for surface voltage calculations, the voltage at the boundary has to be satisfied to yield high accuracy. In the present paper, the authors have proved that no more than two extra segments at the end of each conductor are needed to correct for the assumed current distribution. This modification yielded accurate surface voltage, with average error <5%.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"21 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":"126225661","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.1995.526590
Y. Chen, J. Huang, J. Hayes, M. Mehmet Ali
An ATM network is expected to support a large number of bursty traffic sources, and therefore, it is critical to control the network traffic in order to provide a desirable level of performance. The "leaky bucket" scheme is a typical policing or usage parameter control (UPC) mechanism in ATM networks. We build a modified geometric model (MGeo) for the interdeparture time distribution of the leaky bucket. The control effects of leaky bucket are extensively examined, from the viewpoint of smoothing out the burstiness of the input traffic, with numerical examples. The smoothing effect is reflected by the squared coefficient of variation (SCV) of the interdeparture time of the departure process from the leaky bucket. We offer a procedure to fit the interdeparture time distribution of the leaky bucket to the MGeo model. We also provide simulation results to verify the model. The trade-off between the burstiness of the departure process and the cell delay is examined.
{"title":"Departure process characterization of the leaky bucket with modified geometric mode","authors":"Y. Chen, J. Huang, J. Hayes, M. Mehmet Ali","doi":"10.1109/CCECE.1995.526590","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526590","url":null,"abstract":"An ATM network is expected to support a large number of bursty traffic sources, and therefore, it is critical to control the network traffic in order to provide a desirable level of performance. The \"leaky bucket\" scheme is a typical policing or usage parameter control (UPC) mechanism in ATM networks. We build a modified geometric model (MGeo) for the interdeparture time distribution of the leaky bucket. The control effects of leaky bucket are extensively examined, from the viewpoint of smoothing out the burstiness of the input traffic, with numerical examples. The smoothing effect is reflected by the squared coefficient of variation (SCV) of the interdeparture time of the departure process from the leaky bucket. We offer a procedure to fit the interdeparture time distribution of the leaky bucket to the MGeo model. We also provide simulation results to verify the model. The trade-off between the burstiness of the departure process and the cell delay is examined.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"16 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":"126243282","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：