2019 27th Iranian Conference on Electrical Engineering (ICEE)最新文献_第8页

Modeling and Parameter Identification of Piezoelectric Actuator in Micropositioning Systems 微定位系统中压电驱动器的建模与参数辨识

2019 27th Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786431

Sara Tayouri, I. Izadi, J. Ghaisari

{"title":"Modeling and Parameter Identification of Piezoelectric Actuator in Micropositioning Systems","authors":"Sara Tayouri, I. Izadi, J. Ghaisari","doi":"10.1109/IranianCEE.2019.8786431","DOIUrl":"https://doi.org/10.1109/IranianCEE.2019.8786431","url":null,"abstract":"Due to the development of technology, actuators possessing high precision performances are increasingly needed more than before. Because of their high precision, fast expansion, and independence from the magnetic field, piezoelectric actuators are superior in comparison to other actuators based on smart materials. However, hysteresis, creep, and vibrational dynamics are challenges faced while working with piezoelectric actuators. Among those characteristics, hysteresis, which is a nonlinear behavior, degrades precision, bandwidth, and accuracy. In this paper, a dynamical model for a piezoelectric actuator is obtained, and the parameters of the hysteresis, vibration, and creep models are calculated. The Levenberg-Marquardt algorithm is used for identification of the parameters of the Normalized Bouc-Wen, and the C-H model. The calculated models are tested and validated by applying a multi-sine wave as an input to the experimental setup. Also, a differential equation form for the C-H model is calculated which can be used to design a nonlinear controller. The obtained nonlinear hysteresis, linear creep, and linear vibration models can then be connected in series to provide a model to describe the main characteristics of a piezoelectric actuator.","PeriodicalId":6683,"journal":{"name":"2019 27th Iranian Conference on Electrical Engineering (ICEE)","volume":"34 1","pages":"1193-1198"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84008759","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

Hysteresis Observation in Smart Material Actuators with Unstructured Uncertainty 具有非结构不确定性的智能材料执行器的迟滞观测

2019 27th Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786570

S. F. Alem, I. Izadi, F. Sheikholeslam

引用次数: 0

Low-cost and Real-time Hardware Implementation of Stereo Vision System on FPGA 基于FPGA的低成本实时立体视觉系统硬件实现

2019 27th Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786410

Mostafa Fathi, S. Sheikhaei, Javad Tavakoli

{"title":"Low-cost and Real-time Hardware Implementation of Stereo Vision System on FPGA","authors":"Mostafa Fathi, S. Sheikhaei, Javad Tavakoli","doi":"10.1109/IranianCEE.2019.8786410","DOIUrl":"https://doi.org/10.1109/IranianCEE.2019.8786410","url":null,"abstract":"In this work, one of local stereo vision algorithms named SAD approach, which is used in image depth estimation, has been surveyed, and an efficient and real-time new hardware implementation has been proposed. The proposed method has been verified and tested using C implementation. The acceptable simulation results along with the detailed explanation of numerous pre-processing steps are also presented. Our innovations could be divided into two sections: architecture and algorithm. In architecture section, by using a specific architecture, memory access has been lowered and therefore, speed has been increased. In algorithm section, a part of local algorithm, known as refinement, has been substituted with a simpler and more efficient algorithm. Cyclone IV has been utilized as our hardware platform. In this article, this point would demonstrate how to use an exact but less complicated controller, which results in less area, and how to use pipeline architecture and remove repetitive and redundant memory accesses, which conduct our stereo vision system to meet the real-time constraints. Suggested hardware implementation could reach to 53fps processing speed with 100MHz clock. No processing IP core has been used. In comparison with related work, our proposed method is more efficient in logic elements usage, and accordingly in power consumption.","PeriodicalId":6683,"journal":{"name":"2019 27th Iranian Conference on Electrical Engineering (ICEE)","volume":"1 1","pages":"258-263"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83059076","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

Hardware Implementation of High Speed Bartlett Spectral Density Estimator Based on R4MDC FFT 基于R4MDC FFT的高速Bartlett谱密度估计器的硬件实现

2019 27th Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786645

Abdolvahab Khalili Sadaghiani, Samad Sheikhai

引用次数: 1

Influence Maximization Under Partially Observable Environments 部分可观察环境下的影响最大化

2019 27th Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786657

Saeid Ghafouri, S. H. Khasteh

{"title":"Influence Maximization Under Partially Observable Environments","authors":"Saeid Ghafouri, S. H. Khasteh","doi":"10.1109/IranianCEE.2019.8786657","DOIUrl":"https://doi.org/10.1109/IranianCEE.2019.8786657","url":null,"abstract":"The problem of influence maximization is a classic subject to study in the field of network science. It is about finding the top-k important individuals in a network for message dissemination under a particular diffusion model. Each year a number of new research papers are published concerning the same issue. However, most of these methods can only operate in situations where the whole graph is visible to the algorithm which is an unrealistic assumption in many cases. There are many cases where the induced network model of a natural phenomenon is associated with missing links. Discarding these links will lead to serious drawbacks in the result. In this work, we have extended the current state of the art influence maximization algorithms by adding a link prediction heuristic step prior to the actual run of the algorithm. For the purpose of link prediction, we have used exponential random graph models also known as ERGM due to their probabilistic link prediction capabilities. We have shown that this heuristic can significantly improve the effectiveness of influence maximization algorithms and in a diffusion scenario we can have a larger number of infected nodes using the seed nodes of the influence maximization algorithm.","PeriodicalId":6683,"journal":{"name":"2019 27th Iranian Conference on Electrical Engineering (ICEE)","volume":"14 1","pages":"1984-1988"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80933464","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

Low-cost Metallic Linear Array Antenna with Cosecant-Squared Radiation Pattern 具有余割平方辐射方向图的低成本金属线阵天线

2019 27th Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786640

M. Rafaei-Booket, S. H. Taheri

引用次数: 0

Design and Simulation of Dual Polarization GST-on-Silicon Nitride Optical Modulator 双偏振gst -氮化硅光调制器的设计与仿真

2019 27th Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786729

A. Shadmani, M. Miri

{"title":"Design and Simulation of Dual Polarization GST-on-Silicon Nitride Optical Modulator","authors":"A. Shadmani, M. Miri","doi":"10.1109/IranianCEE.2019.8786729","DOIUrl":"https://doi.org/10.1109/IranianCEE.2019.8786729","url":null,"abstract":"Application of Silicon-based optical modulators in some wavelength ranges (such as O-band) is challenging because of the two photon absorption (TPA) effect of Si. Silicon nitride (Si3N4), on the other hand has a larger bandgap compared to Si, which minimizes the TPA effect in it. The lack of fast free carrier dispersion effects and relatively large footprint of Si3N4optical waveguides are the basic shortcomings of Si3N4-based devices. Here, integration of the phase change material of Ge2Sb2Te5within the Si3N4waveguides is proposed as a solution to overcome both these limitations. Phase transition of the GST provides a mechanism for optical modulation while large variation in its refractive index during the phase transitions, reduces the length of the modulators. A dual polarization optical modulator is designed in this manuscript, which according to our simulations provides respectively, the reasonable insertion loss and high extinction ratio of ~1.15dB, and 8.12dB for the TE, and low insertion loss of ~0.57dB, and the extinction of 1.75dB, for the TM polarized light. Furthermore, the proposed structure offers ultra-wide optical bandwidth of 500nm (covering O-band to U-band), small overall footprint 2.4µm2, and its bitrate and energy consumption is estimated to be about 0.4Gbit/sec and 12pJ, respectively.","PeriodicalId":6683,"journal":{"name":"2019 27th Iranian Conference on Electrical Engineering (ICEE)","volume":"12 1","pages":"220-223"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87471420","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

Transient Stability Detection via Quick Estimation of the Critical Clearing Time Using Intelligent Systems with Energy Functions Based Inputs 基于能量函数输入的智能系统快速估计临界清除时间的暂态稳定检测

2019 27th Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786628

Hamid Reza Shabani, M. Kalantar

引用次数: 0

Nonlinear and Time Varying System Identification Using a Novel Adaptive Fully Connected Recurrent Wavelet Network 基于自适应全连通循环小波网络的非线性时变系统辨识

2019 27th Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786669

Zahra Motazedian, A. Safavi

引用次数: 1

Neural Spike Compression Based on Split Vector Quantization for Implantable BMIs 基于分割矢量量化的神经脉冲压缩植入式bmi

2019 27th Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786761

Nazanin Ahmadi Dastgerdi, Hossein Hoseini-Nejad, H. Amiri

引用次数: 0