Pub Date : 1995-09-05DOI: 10.1109/CCECE.1995.528088
C.J.B. Fayomii, M. Sawan, S. Bennis
A new approach for implementing a parallel VLSI architecture of a simplified Kalman filter (information filter) with unknown noise statistics is described. At the system level, the proposed approach is applied to a semi-systolic VLSI array to accelerate the matrix operations required in each iteration. In order to maximize the parallelism, a new architecture called the tri-trapezoidal array for implementing the Schur complement algorithm is proposed. The computations steps are decomposed into 2(m+1) parts executable in parallel. This decomposition decreases the computation time by 55%. The overall architecture exhibits a high performance and can be used for real time applications.
{"title":"Parallel VLSI implementation of a new simplified architecture of Kalman filter","authors":"C.J.B. Fayomii, M. Sawan, S. Bennis","doi":"10.1109/CCECE.1995.528088","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528088","url":null,"abstract":"A new approach for implementing a parallel VLSI architecture of a simplified Kalman filter (information filter) with unknown noise statistics is described. At the system level, the proposed approach is applied to a semi-systolic VLSI array to accelerate the matrix operations required in each iteration. In order to maximize the parallelism, a new architecture called the tri-trapezoidal array for implementing the Schur complement algorithm is proposed. The computations steps are decomposed into 2(m+1) parts executable in parallel. This decomposition decreases the computation time by 55%. The overall architecture exhibits a high performance and can be used for real time applications.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"60 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":"126163388","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.1995.528077
P. Sicard, S.M. Javad Sadr
Passivity based control laws have interesting features, such as robustness of stability and natural extension to passive controller-observer design. We present reduced and full state passive control laws for a flexible joint robot. We show that even though reduced state feedback guarantees global asymptotic stability, the dynamic performance is poor since it is driven by the natural modes of the mechanical structure. However, full state feedback can be used to inject damping and accelerate the link state behavior. The robustness of the control law permits the use of an approximate feedforward signal to reduce the complexity of the control algorithm.
{"title":"Comparison of reduced state and full state passive control laws for flexible joint robots","authors":"P. Sicard, S.M. Javad Sadr","doi":"10.1109/CCECE.1995.528077","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528077","url":null,"abstract":"Passivity based control laws have interesting features, such as robustness of stability and natural extension to passive controller-observer design. We present reduced and full state passive control laws for a flexible joint robot. We show that even though reduced state feedback guarantees global asymptotic stability, the dynamic performance is poor since it is driven by the natural modes of the mechanical structure. However, full state feedback can be used to inject damping and accelerate the link state behavior. The robustness of the control law permits the use of an approximate feedforward signal to reduce the complexity of the control algorithm.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"42 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":"126303768","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.1995.526579
T. Wong, C. Rosu, J. Houle
This paper presents an analysis of a heuristic mapping method used in the scheduling of parallel real-time tasks. Tasks arise when an electrical network, targeted for simulation, is broken down into real-time schedulable objects with resource requirements and timing constraints. Also, tasks are characterized by their worst-ease execution times and their hard deadlines. Results from computer simulations show the dynamic behavior of the mapping method.
{"title":"Analysis of a heuristic mapping method for parallel real-time simulation of electrical networks","authors":"T. Wong, C. Rosu, J. Houle","doi":"10.1109/CCECE.1995.526579","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526579","url":null,"abstract":"This paper presents an analysis of a heuristic mapping method used in the scheduling of parallel real-time tasks. Tasks arise when an electrical network, targeted for simulation, is broken down into real-time schedulable objects with resource requirements and timing constraints. Also, tasks are characterized by their worst-ease execution times and their hard deadlines. Results from computer simulations show the dynamic behavior of the mapping method.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"17 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":"130072785","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.1995.528118
C. Nassar, M. Soleymani
We develop a general receiver for the detection of data in the presence of additive noise and other channel impairments. These impairments may be any channel effect which introduces unknown, possibly random parameters into the received signal. These include phase offset, frequency offset, complex channel gain, intersymbol interference, or any combination thereof. The proposed receiver uses a structure based on parallel processing; m demodulators are placed in parallel, followed by a decision unit which makes selections from the m demodulator outputs. We detail the components of this receiver for some important channels. Using an illustrative example, we demonstrate the ability of this receiver to achieve a performance closely matching optimal, while maintaining a low complexity.
{"title":"The general unknown parameter receiver","authors":"C. Nassar, M. Soleymani","doi":"10.1109/CCECE.1995.528118","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528118","url":null,"abstract":"We develop a general receiver for the detection of data in the presence of additive noise and other channel impairments. These impairments may be any channel effect which introduces unknown, possibly random parameters into the received signal. These include phase offset, frequency offset, complex channel gain, intersymbol interference, or any combination thereof. The proposed receiver uses a structure based on parallel processing; m demodulators are placed in parallel, followed by a decision unit which makes selections from the m demodulator outputs. We detail the components of this receiver for some important channels. Using an illustrative example, we demonstrate the ability of this receiver to achieve a performance closely matching optimal, while maintaining a low complexity.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"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":"130087011","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.1995.526591
M. C. Ghanem, S.E. Morry, K. Al-haddad, G. Roy
This article proposes a new topology and control strategy to optimise the power factor of a parallel resonance AC/DC convertor of high power while retaining high efficiency. The static and dynamic characteristics determined by the phase-plane method and the results obtained from simulation with Matlab software are detailed and analysed with an example of design of a convertor operating at 33 kHz and 2.5 kW. With adjustment of the commutator control signal a line current of sinusoidal form can be created in phase with the network voltage while maintaining soft switching. The amplitude and phase of the current can be adjusted separately.
{"title":"Study of a modified parallel resonance AC-DC convertor with unity power factor and high efficiency","authors":"M. C. Ghanem, S.E. Morry, K. Al-haddad, G. Roy","doi":"10.1109/CCECE.1995.526591","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526591","url":null,"abstract":"This article proposes a new topology and control strategy to optimise the power factor of a parallel resonance AC/DC convertor of high power while retaining high efficiency. The static and dynamic characteristics determined by the phase-plane method and the results obtained from simulation with Matlab software are detailed and analysed with an example of design of a convertor operating at 33 kHz and 2.5 kW. With adjustment of the commutator control signal a line current of sinusoidal form can be created in phase with the network voltage while maintaining soft switching. The amplitude and phase of the current can be adjusted separately.","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":"127810128","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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