Pub Date : 2008-07-20DOI: 10.1109/SSD.2008.4632874
H. Djeghloud, H. Benalla, A. Bentounsi
A straightforward approach to suppress three-phase supply current and load voltage distortions is presented. This latter uses the unified power quality conditioner (UPQC) topology made up of a hybrid active power filter (APF) combination based on a series APF, sharing a common DC voltage with a parallel APF, and passive filters. Supply current distortion is introduced by connecting a non-linear load, while load voltage distortion occurs after adding 5th and 7th harmonics to the AC main voltage. The series APF controller forces load voltage to be sinusoidal, whereas parallel APF and passive filters counter harmonic contents from supply current. A model established under Matlab-Simulink software shows the performance of such approach.
{"title":"Supply current and load voltage distortions suppression using the unified power quality conditioner","authors":"H. Djeghloud, H. Benalla, A. Bentounsi","doi":"10.1109/SSD.2008.4632874","DOIUrl":"https://doi.org/10.1109/SSD.2008.4632874","url":null,"abstract":"A straightforward approach to suppress three-phase supply current and load voltage distortions is presented. This latter uses the unified power quality conditioner (UPQC) topology made up of a hybrid active power filter (APF) combination based on a series APF, sharing a common DC voltage with a parallel APF, and passive filters. Supply current distortion is introduced by connecting a non-linear load, while load voltage distortion occurs after adding 5th and 7th harmonics to the AC main voltage. The series APF controller forces load voltage to be sinusoidal, whereas parallel APF and passive filters counter harmonic contents from supply current. A model established under Matlab-Simulink software shows the performance of such approach.","PeriodicalId":267264,"journal":{"name":"2008 5th International Multi-Conference on Systems, Signals and Devices","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117198543","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 : 2008-07-20DOI: 10.1109/SSD.2008.4632788
Khaled Daqrouq, I. Abu-Isbeih, A. Al-Qawasmi
Wavelet theory is inspired the development of a strong methodology for signal processing and can be used as a good tool for non-stationary electrocardiogram (ECG signal) detection. In this paper a QRS complex detection method is proposed based on wavelet transform (WT) with Symmlets function. The proposed method show sharp results for ECG detection parameters. The fiducial points are easily detected and the results show that the sensitivity of the proposed detector is 99.8% and the specificity is 98.6%. The results obtained in this paper are based on real ECG signal.
{"title":"QRS complex detection based on Symmlets wavelet function","authors":"Khaled Daqrouq, I. Abu-Isbeih, A. Al-Qawasmi","doi":"10.1109/SSD.2008.4632788","DOIUrl":"https://doi.org/10.1109/SSD.2008.4632788","url":null,"abstract":"Wavelet theory is inspired the development of a strong methodology for signal processing and can be used as a good tool for non-stationary electrocardiogram (ECG signal) detection. In this paper a QRS complex detection method is proposed based on wavelet transform (WT) with Symmlets function. The proposed method show sharp results for ECG detection parameters. The fiducial points are easily detected and the results show that the sensitivity of the proposed detector is 99.8% and the specificity is 98.6%. The results obtained in this paper are based on real ECG signal.","PeriodicalId":267264,"journal":{"name":"2008 5th International Multi-Conference on Systems, Signals and Devices","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115835049","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 : 2008-07-20DOI: 10.1109/SSD.2008.4632801
A. A. Ladjici, M. Boudour
Market equilibrium of an oligopolistic electricity market considering transmission constraints. The market game is played by bounded evolutionary agents, adapting their strategies to maximize their profits in a competitive environment. This paper considers a centralized market with maximalist ISO. The ISO performs an OPF based on submitted Agentspsila bid and calculates the power to be dispatched from each supplier, in order to maximize the social welfare and preserve the integrity of the power system, while, market agents interact strategically to maximize their profit. By using competitive coevolutionary algorithm as a learning algorithm, agentspsila strategies are led towards Nash-Cournot equilibrium, where no agent is incited to change unilaterally his strategy.
{"title":"Electricity market equilibrium using competitive coevolutionary algorithms with transmission constraints","authors":"A. A. Ladjici, M. Boudour","doi":"10.1109/SSD.2008.4632801","DOIUrl":"https://doi.org/10.1109/SSD.2008.4632801","url":null,"abstract":"Market equilibrium of an oligopolistic electricity market considering transmission constraints. The market game is played by bounded evolutionary agents, adapting their strategies to maximize their profits in a competitive environment. This paper considers a centralized market with maximalist ISO. The ISO performs an OPF based on submitted Agentspsila bid and calculates the power to be dispatched from each supplier, in order to maximize the social welfare and preserve the integrity of the power system, while, market agents interact strategically to maximize their profit. By using competitive coevolutionary algorithm as a learning algorithm, agentspsila strategies are led towards Nash-Cournot equilibrium, where no agent is incited to change unilaterally his strategy.","PeriodicalId":267264,"journal":{"name":"2008 5th International Multi-Conference on Systems, Signals and Devices","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121566824","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 : 2008-07-20DOI: 10.1109/SSD.2008.4632822
D. Lalili, E. Berkouk, F. Boudjema, N. Lourci
In this paper, space vector pulse width modulation algorithm for five level diode clamping inverter, with self stabilisation of dc link capacitor voltages is presented. On the base of position of reference voltage vector in space vector diagram, we explain how to choose switching states that will be used to generate the output voltages. The redundancies of some switching states are thoughtfully used to cancel imbalance of dc link capacitor voltages, on the base of a closed loop that use measurements of output and input currents of the inverter.
{"title":"Self balancing of DC link capacitor voltages using redundant vectors for SVPWM controlled five-level inverter","authors":"D. Lalili, E. Berkouk, F. Boudjema, N. Lourci","doi":"10.1109/SSD.2008.4632822","DOIUrl":"https://doi.org/10.1109/SSD.2008.4632822","url":null,"abstract":"In this paper, space vector pulse width modulation algorithm for five level diode clamping inverter, with self stabilisation of dc link capacitor voltages is presented. On the base of position of reference voltage vector in space vector diagram, we explain how to choose switching states that will be used to generate the output voltages. The redundancies of some switching states are thoughtfully used to cancel imbalance of dc link capacitor voltages, on the base of a closed loop that use measurements of output and input currents of the inverter.","PeriodicalId":267264,"journal":{"name":"2008 5th International Multi-Conference on Systems, Signals and Devices","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122547078","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 : 2008-07-20DOI: 10.1109/SSD.2008.4632800
O. Gouda, G. Amer, T. El-Saied
Grounding system behavior under transient condition is investigated. Transmission line approach has been chosen to simulate the buried grounding system under lightning condition. Different models of buried grounding grids have been studied under lightning conditions. Sensitivity analysis of soil parameters and grounding grid dimensions have been studied to understand the effect of each parameter on the performance of grounding systems subjected to lightning.
{"title":"Factors affecting transient response of grounding grid systems","authors":"O. Gouda, G. Amer, T. El-Saied","doi":"10.1109/SSD.2008.4632800","DOIUrl":"https://doi.org/10.1109/SSD.2008.4632800","url":null,"abstract":"Grounding system behavior under transient condition is investigated. Transmission line approach has been chosen to simulate the buried grounding system under lightning condition. Different models of buried grounding grids have been studied under lightning conditions. Sensitivity analysis of soil parameters and grounding grid dimensions have been studied to understand the effect of each parameter on the performance of grounding systems subjected to lightning.","PeriodicalId":267264,"journal":{"name":"2008 5th International Multi-Conference on Systems, Signals and Devices","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122645747","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 : 2008-07-20DOI: 10.1109/SSD.2008.4632843
A. Salama, K. Quboa
In this paper, two fractal dipole antennas has been designed and optimized for passive RFID tags at 900 MHz, one based on the 3rd iteration of a modified Koch fractal curve and the other is based on the 3rd iteration of the proposed fractal curve. The designed fractal dipoles have been simulated using IE3D simulator based on Method of Moments (MOM). The simulation showed that the modified Koch fractal dipole has better radiation characteristics and longer read range than the proposed fractal dipole antenna. The two antennas are fabricated using PCB technology and examined in anechoic chamber. The experimental results showed a good agreement with the simulation. The effect of different materials attached to the fabricated antennas is examined.
{"title":"Fractal dipoles as meander line antennas for passive UHF RFID tags","authors":"A. Salama, K. Quboa","doi":"10.1109/SSD.2008.4632843","DOIUrl":"https://doi.org/10.1109/SSD.2008.4632843","url":null,"abstract":"In this paper, two fractal dipole antennas has been designed and optimized for passive RFID tags at 900 MHz, one based on the 3rd iteration of a modified Koch fractal curve and the other is based on the 3rd iteration of the proposed fractal curve. The designed fractal dipoles have been simulated using IE3D simulator based on Method of Moments (MOM). The simulation showed that the modified Koch fractal dipole has better radiation characteristics and longer read range than the proposed fractal dipole antenna. The two antennas are fabricated using PCB technology and examined in anechoic chamber. The experimental results showed a good agreement with the simulation. The effect of different materials attached to the fabricated antennas is examined.","PeriodicalId":267264,"journal":{"name":"2008 5th International Multi-Conference on Systems, Signals and Devices","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126510597","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 : 2008-07-20DOI: 10.1109/SSD.2008.4632815
B. Hichem, M. Faouzi
In this paper, a new approach based on the multi-agent concept is proposed for model predictive control (MAMPC) of a nonlinear fast dynamic system. This concept achieves a transformation of the centralized MBPC in a decentralized and supervised technique. The control of the nonlinear system subject to constraints is achieved via a set of actions taken from different agents. The actions are based on an analytical solution and a fuzzy supervision is used to monitor the closed system using a supervisory loop concept. These strategies of control permits to unlock the obstacle met by the MBPC dedicated to the oscillating and fast dynamic systems and facilitate their real time implantation. The multi-agent compares favorably with respect to a numerical optimization procedure and offers a solution for nonconvex optimization. A simulation example shows the fast execution of the proposed concept compared to conventional procedure.
{"title":"A multi-agent predictive control approach based on fuzzy supervisory loop for fast dynamic systems","authors":"B. Hichem, M. Faouzi","doi":"10.1109/SSD.2008.4632815","DOIUrl":"https://doi.org/10.1109/SSD.2008.4632815","url":null,"abstract":"In this paper, a new approach based on the multi-agent concept is proposed for model predictive control (MAMPC) of a nonlinear fast dynamic system. This concept achieves a transformation of the centralized MBPC in a decentralized and supervised technique. The control of the nonlinear system subject to constraints is achieved via a set of actions taken from different agents. The actions are based on an analytical solution and a fuzzy supervision is used to monitor the closed system using a supervisory loop concept. These strategies of control permits to unlock the obstacle met by the MBPC dedicated to the oscillating and fast dynamic systems and facilitate their real time implantation. The multi-agent compares favorably with respect to a numerical optimization procedure and offers a solution for nonconvex optimization. A simulation example shows the fast execution of the proposed concept compared to conventional procedure.","PeriodicalId":267264,"journal":{"name":"2008 5th International Multi-Conference on Systems, Signals and Devices","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130580349","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 : 2008-07-20DOI: 10.1109/SSD.2008.4632779
S. Behera, C. Maity
This paper proposes a new upcoming model of real time location system (RTLS) to focus and track the exact location of real time objects in vicinity. Overcoming the limitations of size, power, attenuation of GPS & DGPS system, the active RFID tags can be easily affixed with objects. The TIA approach of distance calculation will minimize the errors occurred in RSSI method. Geographically fixed matrix of RFID readers at 50 m to 1 km apart, will monitor, track, and calculate the exact position of tagged-object by communicating with the tag and other co-readers. One 48 MHz PLL enabled 8-bit CPU in RFID reader is enough to calculate the TIA with an accuracy of 3.3 m distance. One active tag with 100 mAh cell can respond many thousands of times using IEEE802.15.4 standard which makes it globally acceptable. DSSS and GFSK used in the tag for more reliable data communication. One central server is enough to store, filter, and handle the calculated data flowing from the matrix net of RFID readers.
{"title":"Active RFID tag in Real Time Location System","authors":"S. Behera, C. Maity","doi":"10.1109/SSD.2008.4632779","DOIUrl":"https://doi.org/10.1109/SSD.2008.4632779","url":null,"abstract":"This paper proposes a new upcoming model of real time location system (RTLS) to focus and track the exact location of real time objects in vicinity. Overcoming the limitations of size, power, attenuation of GPS & DGPS system, the active RFID tags can be easily affixed with objects. The TIA approach of distance calculation will minimize the errors occurred in RSSI method. Geographically fixed matrix of RFID readers at 50 m to 1 km apart, will monitor, track, and calculate the exact position of tagged-object by communicating with the tag and other co-readers. One 48 MHz PLL enabled 8-bit CPU in RFID reader is enough to calculate the TIA with an accuracy of 3.3 m distance. One active tag with 100 mAh cell can respond many thousands of times using IEEE802.15.4 standard which makes it globally acceptable. DSSS and GFSK used in the tag for more reliable data communication. One central server is enough to store, filter, and handle the calculated data flowing from the matrix net of RFID readers.","PeriodicalId":267264,"journal":{"name":"2008 5th International Multi-Conference on Systems, Signals and Devices","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128682580","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 : 2008-07-20DOI: 10.1109/SSD.2008.4632792
Jiang-Huai Pan, Jia-Zhou He, Yan-Li Li
An algorithm is presented to absolutely registration two 3-D sensors using targets that are tracked by both sensors. The algorithm estimates and removes sensor biases and sensor frame orientation errors, For illustrative purposes, the algorithm uses the difference in the position of a target, as reported by the two sensors, to compute a set of bias parameters. These bias parameters are then applied to align both sensorpsilas track positional data. The registration algorithm is applicable to those situations where there are no sensor location errors, the magnitude of the bias errors is small, and these errors do not change with time or very slowly with time.
{"title":"New registration algorithm of sensor in ECEF coordinate system","authors":"Jiang-Huai Pan, Jia-Zhou He, Yan-Li Li","doi":"10.1109/SSD.2008.4632792","DOIUrl":"https://doi.org/10.1109/SSD.2008.4632792","url":null,"abstract":"An algorithm is presented to absolutely registration two 3-D sensors using targets that are tracked by both sensors. The algorithm estimates and removes sensor biases and sensor frame orientation errors, For illustrative purposes, the algorithm uses the difference in the position of a target, as reported by the two sensors, to compute a set of bias parameters. These bias parameters are then applied to align both sensorpsilas track positional data. The registration algorithm is applicable to those situations where there are no sensor location errors, the magnitude of the bias errors is small, and these errors do not change with time or very slowly with time.","PeriodicalId":267264,"journal":{"name":"2008 5th International Multi-Conference on Systems, Signals and Devices","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131989059","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 : 2008-07-20DOI: 10.1109/SSD.2008.4632890
A. Elsayad
Image segmentation is the first step towards image analysis and image understanding. However, most image segmentation algorithms require a priori knowledge of the number of partitions in the image to be segmented. This paper introduces a novel method for completely unsupervised image segmentation by using wavelet analysis and fuzzy Gustafson-Kessel (GK) algorithm. The proposed algorithm needs no predefined number of partitions nor the number of textures in the image. The algorithm consists of feature extraction employs wavelet transform to decompose the image into different spectral components and build a feature vector for every pixel. These vectors are grouped together into clusters using the GK clustering algorithm. GK is less sensitive to fall into local minima and it has the power to generate clusters with different geometrical shapes. The appropriate number of clusters, hence number of image segments, is determined to minimize the compactness and separation clustering validity measure. The algorithm is applied to segment artificial and real images where experimental results demonstrate the effectiveness of the proposed method.
{"title":"Completely unsupervised image segmentation using wavelet analysis and Gustafson-Kessel clustering","authors":"A. Elsayad","doi":"10.1109/SSD.2008.4632890","DOIUrl":"https://doi.org/10.1109/SSD.2008.4632890","url":null,"abstract":"Image segmentation is the first step towards image analysis and image understanding. However, most image segmentation algorithms require a priori knowledge of the number of partitions in the image to be segmented. This paper introduces a novel method for completely unsupervised image segmentation by using wavelet analysis and fuzzy Gustafson-Kessel (GK) algorithm. The proposed algorithm needs no predefined number of partitions nor the number of textures in the image. The algorithm consists of feature extraction employs wavelet transform to decompose the image into different spectral components and build a feature vector for every pixel. These vectors are grouped together into clusters using the GK clustering algorithm. GK is less sensitive to fall into local minima and it has the power to generate clusters with different geometrical shapes. The appropriate number of clusters, hence number of image segments, is determined to minimize the compactness and separation clustering validity measure. The algorithm is applied to segment artificial and real images where experimental results demonstrate the effectiveness of the proposed method.","PeriodicalId":267264,"journal":{"name":"2008 5th International Multi-Conference on Systems, Signals and Devices","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134052890","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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