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2010 18th Iranian Conference on Electrical Engineering最新文献

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Multiobjective H2/H∞ control design for a VSTOL flight model 垂直起降飞行模型的多目标H2/H∞控制设计
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5506983
M. Salari Khaniki, M. Khosrowjerdi
{"title":"Multiobjective H2/H∞ control design for a VSTOL flight model","authors":"M. Salari Khaniki, M. Khosrowjerdi","doi":"10.1109/IRANIANCEE.2010.5506983","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5506983","url":null,"abstract":"In this paper, an application of a multiobjective optimal controller design approach on a multivariable vertical short take-off and landing (VSTOL) aircraft system is presented. To achieve good performance subject to white noises, bounded power disturbances, and to model uncertainties, and to have an acceptable reference tracking, combination of both H2(LQG) and H∞ methods is used. This method uses a time domain game approach for H2/H∞ design. It's required to solve the corresponding set of coupled algebraic Riccati equations to gain multiobjective controller.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126497154","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: 24
Participation of DFIG based wind turbines in improving short term frequency regulation 基于DFIG的风电机组参与改善短期频率调节
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5506955
M. Akbari, S. M. Madani
{"title":"Participation of DFIG based wind turbines in improving short term frequency regulation","authors":"M. Akbari, S. M. Madani","doi":"10.1109/IRANIANCEE.2010.5506955","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5506955","url":null,"abstract":"The increasing penetration of variable speed wind turbines in Power grids results in reduction of the number of connected conventional power plants and system inertia consequently. This reduction affects frequency regulation of the grid. So new grid codes requires wind farms to participate in grid frequency regulation. This paper provides a new method to improve the contribution of DFIG based wind turbines in system frequency regulation. The method uses high kinetic energy stored in wind turbine and ability of DFIG to fast control of output power. This is done by introducing a supplementary loop to DFIG active power control loop. The effectiveness of the method is compared with other methods by simulation.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125641004","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: 17
Locking time of oscillators under external frequency injection 外部频率注入下振荡器的锁定时间
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507038
N. Saniei, A. Tofangdarzade, W. Ng
{"title":"Locking time of oscillators under external frequency injection","authors":"N. Saniei, A. Tofangdarzade, W. Ng","doi":"10.1109/IRANIANCEE.2010.5507038","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507038","url":null,"abstract":"In this work, time domain analysis is used to solve Adler's equation to obtain the phase shift between a free-running oscillator and an externally injected oscillator. In addition, the time required to acquire locking between the two oscillators is also deduced. The dependency of the locking time versus characteristics of the oscillator such as the quality factor, Q, and its free-running frequency are also discussed. Finally, the analyses are verified by simulations of a typical LC oscillator under injection. The results of this analysis enable designers to evaluate the exact timing budget required to achieve injection locking.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125681393","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: 6
Joint subchannel-relay assignment and bit allocation for multi-user cooperative OFDMA systems based on fairness 基于公平性的多用户合作OFDMA系统联合子信道中继分配和位分配
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507060
Hamed Banizaman, S. Almodarresi, A. Tadaion
{"title":"Joint subchannel-relay assignment and bit allocation for multi-user cooperative OFDMA systems based on fairness","authors":"Hamed Banizaman, S. Almodarresi, A. Tadaion","doi":"10.1109/IRANIANCEE.2010.5507060","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507060","url":null,"abstract":"Joint bit allocation, relay selection, and sub-channel assignment are critical and challenging for achieving full benefits of OFDM based cooperative relay networks. In this paper, we study such a problem in an OFDM cooperative network comprising of multi battery-operated source-destination pairs and multiple relays with an objective of minimizing overall transmitting power under a total power and target data rate constraints. Assuming knowledge of the instantaneous channel gains for all links in the entire network, we propose several fairness criteria aiming at providing attractive trade-offs between network lifetime and users' outage probability. Numerical studies are conducted to evaluate the performance of the proposed algorithms in two practical scenarios. Simulation results show that the proposed allocation algorithms achieve good tradeoff between the network lifetime and users' outage.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130175849","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: 1
Gain enhancement of small size UWB antenna for wireless body area network applications 用于无线体域网应用的小尺寸超宽带天线增益增强
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507107
Sara Sadat Karimabadi, A. Attari
{"title":"Gain enhancement of small size UWB antenna for wireless body area network applications","authors":"Sara Sadat Karimabadi, A. Attari","doi":"10.1109/IRANIANCEE.2010.5507107","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507107","url":null,"abstract":"This paper presents a small size ultra wide band antenna for wireless body area network applications. The proposed antenna covers the impedance bandwidth of 3.1 to 10.6 GHz in free space. The gain reduction is the main influence of human body on antenna performance. In order to minimize this effect we modify the structure of the proposed antenna by using a plane reflector. Characteristics of the modified antenna, placed on human body, are investigated. Simulation results show that the modified antenna has good performance in both the frequency domain and time domain.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130269488","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
Power control and spatial reusability by using directional antenna in wireless ad hoc networks 无线自组织网络中定向天线的功率控制和空间复用性
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507070
Azam Samie Ghahfarroky, F. Hendessi
{"title":"Power control and spatial reusability by using directional antenna in wireless ad hoc networks","authors":"Azam Samie Ghahfarroky, F. Hendessi","doi":"10.1109/IRANIANCEE.2010.5507070","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507070","url":null,"abstract":"Directional Antennas are used to have a more flexible MAC protocol in wireless ad hoc networks by transmitting in the preferred directions and minimizing average transmission power. In this paper, a directional MAC protocol is introduced to not only improve energy efficiency, but also to increase throughput. To that end, we modified IEEE 802.11 to propose a more efficient MAC protocol that accomplishes spatial reuse by employing a directional antenna based power control procedure. The simulation results validate that the throughput and power efficiency of the proposed MAC protocol has improved compared to well-known IEEE 802.11 MAC.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"243 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134145586","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
Microwave imaging of perfect electric conductors of arbitrary shape using level set method 任意形状完美电导体的水平集微波成像
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507104
M. Eskandari, A. Zeidaabadi Nezhad, R. Safian
{"title":"Microwave imaging of perfect electric conductors of arbitrary shape using level set method","authors":"M. Eskandari, A. Zeidaabadi Nezhad, R. Safian","doi":"10.1109/IRANIANCEE.2010.5507104","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507104","url":null,"abstract":"In this paper, a shape reconstruction method for electromagnetic tomography based on contour deformations exploiting level set method is proposed. The algorithm is able to reconstruct the shape of multiple perfect conducting objects in two-dimensions. Incident waves are assumed to be TM (Transverse Magnetic) plane waves. The fast marching method is used in reinitialization process which has drastically improved the velocity of the reconstruction. The numerical results clearly shows that this inversion algorithm provides accurate reconstructions of objects from initial guess.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131740230","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
Transient stability improvement using ANFIS controlled UPFC based on energy function 基于能量函数的ANFIS控制UPFC暂态稳定性改进
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5506943
F. Taki, S. Abazari, G. Arab Markadeh
{"title":"Transient stability improvement using ANFIS controlled UPFC based on energy function","authors":"F. Taki, S. Abazari, G. Arab Markadeh","doi":"10.1109/IRANIANCEE.2010.5506943","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5506943","url":null,"abstract":"This paper presents the application of a neuro-fuzzy controlled Unified Power Flow Controller (UPFC) to improve transient stability of power system. In neuro-fuzzy control method the membership function parameters of fuzzy controller can be computed with learning information about a data set. This Adaptive Network Fuzzy Inference System (ANFIS) can track the given input-output data the best. The process of training data generation is based on maximizing the energy function of UPFC. Proposed method is tested on a single machine infinitive bus system to confirm its performance through simulation. The results prove the noticeable influence of neuro-fuzzy controlled UPFC on increasing Critical Clearing Time (CCT) of system.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130711015","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: 8
A new high reliable structure of micro-electro-mechanical radial contour mode disk resonators for UHF application 一种用于超高频应用的新型高可靠性微电子机械径向轮廓模盘谐振器
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507041
M. Baghelani, H. Badri Ghavifekr
{"title":"A new high reliable structure of micro-electro-mechanical radial contour mode disk resonators for UHF application","authors":"M. Baghelani, H. Badri Ghavifekr","doi":"10.1109/IRANIANCEE.2010.5507041","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507041","url":null,"abstract":"A new high reliable microelectromechanical radial contour mode disk resonator is demonstrated with the ability to work at UHF range and high quality factor in both vacuum and air. The hollow disk structure of resonator with a ring shape anchor makes it capable to work at higher frequencies without downscaling. The ring shape anchor, which is placed at the stress free nodal zone of resonator at the desired resonance mode, causes significantly low insertion loss and therefore high quality factor. Such an anchor seems to be more reliable than stem shape anchor reported at previous papers. The motional resistance of the resonator is decreased due to displacement of the electrodes in both inside and outside of the structure. In addition to providing simulation results, this paper formulates the resonance frequency and calculates the optimum location of the anchor. Transfer function, resonance frequency and anchor displacement versus inner radius are studied.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131222083","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: 6
Multi-input voltage-mode min-max circuit 多输入电压模式最小-最大电路
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507034
Reza Shayanfar, A. Khoei, K. Hadidi
{"title":"Multi-input voltage-mode min-max circuit","authors":"Reza Shayanfar, A. Khoei, K. Hadidi","doi":"10.1109/IRANIANCEE.2010.5507034","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507034","url":null,"abstract":"In this paper, a multi-input voltage-mode min-max circuit is proposed, this circuit is a mixed analog-digital one, which is designed in 0.35 um CMOS technology. The advantages of proposed circuit are low power consumption, simple and symmetrical structure, small area and simple expansion for more inputs. The layout of the circuit and the simulation results are given for two inputs.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131197721","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: 8
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