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A Command and Data Handling unit for pico-satellite missions 用于微型卫星任务的指挥和数据处理单元
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090254
Dario Schor, Jane Scowcroft, C. Nichols, W. Kinsner
{"title":"A Command and Data Handling unit for pico-satellite missions","authors":"Dario Schor, Jane Scowcroft, C. Nichols, W. Kinsner","doi":"10.1109/CCECE.2009.5090254","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090254","url":null,"abstract":"This paper outlines the design and implementation of Phase Two of the Command and Data Handling (CDH) unit for the WinCube project. WinCube is a multi-year, multi-disciplinary project conducted at the University of Manitoba in which students from different departments participate in the design of a CubeSat. The purpose of the WinCube project is to provide an opportunity for engineering students to design and implement a space-ready satellite. The project also acts as a vessel for a high school science experiment, which will run an experiment while in space, and relay results down to a satellite base station. The CDH unit must manage the operations and internal communications of the various units inside the satellite. This unit includes a power management application, serial communications protocols to relay information, and a trustworthy timing system. The power management application must monitor the state of the battery, the output of the solar panels, as well as control the amount of power provided to each of the primary units. Serial communications are used to interact with other devices on the satellite. Finally, an external real time clock and watchdog timer were used to enhance the reliability of the system. Special measures were taken to protect the CDH unit from the harsh operating environment and to monitor the health of the system beyond temperature and battery readings by performing periodic tests of components.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123130122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Design of an E-band high power amplifier for wireless high data rate communications 用于无线高数据速率通信的e波段高功率放大器的设计
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090093
S. Asadi, M. Yagoub
{"title":"Design of an E-band high power amplifier for wireless high data rate communications","authors":"S. Asadi, M. Yagoub","doi":"10.1109/CCECE.2009.5090093","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090093","url":null,"abstract":"In this paper, a fully integrated E-band power amplifier with 17 dB gain, 11.5 dBm saturated output power, and 5 GHz bandwidth was achieved in the 90 nm CMOS technology. The amplifier configuration consists of two cascode stages and a common-source output stage. It exhibits a peak power added-efficiency of 20 % while consuming 50 mW from a 1.5 V power supply.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130831519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Detection of anomalous packet traffic via entropy 通过熵检测异常数据包流量
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090107
A. Lawniczak, Hao Wu, B. D. Stefano
{"title":"Detection of anomalous packet traffic via entropy","authors":"A. Lawniczak, Hao Wu, B. D. Stefano","doi":"10.1109/CCECE.2009.5090107","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090107","url":null,"abstract":"We study if information entropy of packet traffic passing through selected set of routers may detect anomalous packet traffic (e.g., distributed denial-of-service (DDoS) attacks) in a packet switching network (PSN) model. Given a certain PSN model setup (i.e., topology, routing algorithm, and source load value) a “natural” entropy profile of normal packet traffic monitored at selected routers characterizes normal operation of PSN model. When entropy of packet traffic deviates significantly from this “natural” profile it means that some anomaly in packet traffic emerges. Our simulations of ping DDoS attacks show that after start of attacks the entropy of packet traffics monitored network-wide at relatively small sets of routers may significantly drop and that it is easier to detect these drops if static routing is used instead of dynamic routing. Thus, for detection of DDoS attacks and other anomalous packet traffic information entropy of packet traffic monitored network-wide at properly selected routers can be a useful tool.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131980905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Dynamic admission control and path allocation for SLAs in DiffServ networks DiffServ网络中sla的动态准入控制和路径分配
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090106
H. A. Harhira, S. Pierre
{"title":"Dynamic admission control and path allocation for SLAs in DiffServ networks","authors":"H. A. Harhira, S. Pierre","doi":"10.1109/CCECE.2009.5090106","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090106","url":null,"abstract":"Today's converged networks are mainly characterized by their support of real-time and high priority traffic requiring a certain level of Quality of Service (QoS). In this context, traffic classification and prioritization are key features in providing preferential treatments of the traffic in the core of the network. In this paper, we address the joint problem of path allocation and admission control (JPAC) of new Service Level Agreements (SLA) in a DiffServ Domain. In order to maximize the resources utilization and the number of admitted SLAs in the network, we consider a statistical bandwidth constraints allowing for a certain overbooking over the network's links. SLAs' admissibility decisions are based on solving to optimality an Integer Linear Programming (ILP) model. When tested by simulations, numerical results confirm that the proposed model can be solved to optimality for real-sized instances within acceptable computation times and substantially reduces the SLAs blocking probability, compared to a the Greedy mechanism proposed in the literature.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129700542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A software simulator for Geomagnetically Induced Currents in electrical power systems 电力系统中地磁感应电流的软件模拟器
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090219
J. Berge, R. Varma
{"title":"A software simulator for Geomagnetically Induced Currents in electrical power systems","authors":"J. Berge, R. Varma","doi":"10.1109/CCECE.2009.5090219","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090219","url":null,"abstract":"This paper describes the development and testing of a software simulator to calculate the flow of Geomagnetically Induced Currents (GIC) in an electrical power transmission grid. In this paper, a new technique for mapping the location of transmission equipment for the purposes of GIC simulation is proposed. The DC modeling of autotransformers for the purpose GIC studies is discussed. The simulator models the electrical power system as an admittance matrix. GIC results for two study systems as obtained from the developed simulator are compared with those obtained from the Electromagnetic Transients Program (EMTP). Finally, the simulator is applied to the entire Hydro One 500/230 kV transmission system to predict GICs. This simulation will help Hydro One plan its mitigation strategies to protect against geomagnetic storms.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"206 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113959147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Scheduling active camera resources for multiple moving targets 为多个移动目标调度活动摄像机资源
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090187
Christopher D. W. Ward, M. Naish
{"title":"Scheduling active camera resources for multiple moving targets","authors":"Christopher D. W. Ward, M. Naish","doi":"10.1109/CCECE.2009.5090187","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090187","url":null,"abstract":"Five scheduling policies that have been developed and implemented to manage the active resources of a centralized active vision system are presented in this paper. These scheduling policies are tasked with making target-to-camera assignments in an attempt to maximize the number of targets that can be imaged with the system's active cameras. A comparative simulation-based evaluation has been performed to investigate the performance of the system under different target and system operating parameters for all five scheduling policies. Parameters considered include: target entry conditions, congestion levels, target-to-camera speeds, target trajectories, and number of active cameras. An overall trend in the relative performance of the scheduling algorithms was observed. The Least System Reconfiguration and Future Least System Reconfiguration scheduling policies performed the best for the majority of conditions investigated, while the Load Sharing and First Come First Serve policies performed the poorest. The performance of the Earliest Deadline First policy was highly dependent on target predictability.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"394 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114378798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Experimental evaluation of PEM Fuel Cell systems efficiency PEM燃料电池系统效率的实验评价
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090223
K. Adegnon, Y. Dubé, K. Agbossou
{"title":"Experimental evaluation of PEM Fuel Cell systems efficiency","authors":"K. Adegnon, Y. Dubé, K. Agbossou","doi":"10.1109/CCECE.2009.5090223","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090223","url":null,"abstract":"Nowadays, the Proton Exchange Membrane Fuel Cell (PEMFC) is considered as one of the most promising sources of energy with zero emissions. Therefore, maintaining the PEMFC system in its optimal operating conditions is one of the most important research orientations in the domain. In fact, the system's efficiency depends highly on the electric power generated, the amount of hydrogen used and the power consumed by the air compressor to operate the fuel cell stack. In this work, the experimental efficiency of the PEMFC system has been evaluated for different values of the PEMFC parameters such as purges frequency, stack temperature, air relative humidity, pressures and mass flow rates of reagents. Then the experimental results show that for a given load current, an optimal efficiency can be obtained by choosing the right values for the parameters.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114915548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Development of a model based efficiency optimization for IPMSM drive IPMSM驱动效率优化模型的建立
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090246
M. Uddin, Fasil Abera
{"title":"Development of a model based efficiency optimization for IPMSM drive","authors":"M. Uddin, Fasil Abera","doi":"10.1109/CCECE.2009.5090246","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090246","url":null,"abstract":"A model based efficiency optimization algorithm for speed control of interior permanent magnet synchronous motor (IPMSM) drive is proposed in this paper. In order to optimize the efficiency the loss minimization algorithm is developed based on motor model and operating conditions. The d-axis armature current is utilized to minimize the losses of the IPMSM in a closed loop vector control environment. The complete simulation model for the closed loop vector control of IPMSM drive incorporating the proposed loss minimization algorithm is developed using Matlab/Simulink software. The effectiveness of the proposed algorithm is tested in simulation at different dynamic operating conditions. It is found for the results that the efficiency of the proposed IPMSM drive is improved significantly as compared to the conventional id=0 control technique.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114486875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Noise reduction to enhance classification of images using textural information 利用纹理信息进行降噪以增强图像分类
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090129
W. Harron, R. Dony, Stephen Miller
{"title":"Noise reduction to enhance classification of images using textural information","authors":"W. Harron, R. Dony, Stephen Miller","doi":"10.1109/CCECE.2009.5090129","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090129","url":null,"abstract":"A method is presented to classify the percent intramuscular fat (%IMF) for beef cattle using ultrasound imaging. As the images captured tend to include a significant amount of noise a noise reduction algorithmwas used. The effectiveness of using filtered images to calculate texture measures for the classification and prediction of the %IMF is compared to the effectiveness of using unfiltered images.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114734031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
VSC HVDC transmission and offshore grid design for a linear generator based wave farm 基于线性发电机的波浪电场的VSC高压直流输电和海上电网设计
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090091
Jonathan Robinson, G. Joós
{"title":"VSC HVDC transmission and offshore grid design for a linear generator based wave farm","authors":"Jonathan Robinson, G. Joós","doi":"10.1109/CCECE.2009.5090091","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090091","url":null,"abstract":"This paper analyzes technical issues with the installation of a linear generator based offshore wave farm using a Voltage Source Converter (VSC) HVDC connection to the onshore grid. Design issues are introduced by summarizing the current status of VSC HVDC technology and related installations, research in the use of VSC HVDC for offshore wind farms, and characteristics of wave energy converters using linear generators. A DC bus wave farm design using a linear generator model is presented and simulations using time shifted and variable amplitude wave inputs demonstrate the effect of increasing the size of the wave farm on smoothing short-term variations in the power output due to wave oscillations.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128076411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
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