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MIMO Robust Servo Controller Design Based on Internal Model Principle Using Polynomial Differential Operator

AETA International Conference

作者： Kim, Sang Bong Kim, Dae Hwan Pratama, Pandu Sandi Kim, Jin Wook Kim, Hak Kyeong Oh, Sea June Jung, Young Seok Pukyong Natl Univ Dept Mech Design Engn Busan 608739 South Korea Korea Maritime Univ Div Mechatron Engn Busan South Korea

ISBN: (纸本)9783319272474;9783319272450

This paper proposes a controller design method for the multi-input multi-output robust servo system based on the internal model principle using polynomial differential operator. To do this task, the followings are done. Firstly, the basic idea of internal model principle is described. Secondly, the extended system by operating the polynomial differential operator to a given system with disturbance under the given conditions of reference and disturbance expressed into polynomial differential equation form and an output error is introduced. Thirdly, the controllability checking of the extended systems is done. Fourthly, a state feedback law is obtained by solving the pole assignment problem with all the poles of the extended system. Fifthly, a full observer is designed to estimate unknown states. Sixthly, the proposed control method is applied to a four steering wheel vehicle. Simulation results show that the proposed method can successfully make the system with a step and ramp type of disturbance track three references such as step, ramp and parabola types.

关键词： Internal model principle multi-input multi-output Polynomial differential equation Robust servo controller

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Performance Analysis and Hardware Implementation of A Dual input Triple output DC-DC Converter for EV application 2

Performance Analysis and Hardware Implementation of A Dual I...

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2nd International Conference on Power Electronics and Energy, ICPEE 2023

作者： Mishra, Tuhinanshu Singh, Ravindra Kumar Motilal Nehru National Institute of Technology-Allahabad Prayagraj Dept. of Electrical Engineering Prayagraj India

ISBN: (纸本)9781665470582

Electric vehicles reduce the on-board emission of pollutants but fail in resource consumption since grid-charged batteries rely on fossil fuel consumption. Vehicles based on renewable sources further eliminate this issue delivering completely pollution-free traction. This paper evaluates an erickshaw power train fed by PV and DC battery hybrid through a dual input triple output converter topology and investigates the performance of such vehicle through simulation. A multiinput multi-output converter reduces component count and extra losses while improving space utilization and packaging. Hardware implementation is done to analyze the proposed topology. This converter will extensively improve power train efficiency while reducing losses. © 2023 IEEE.

关键词： DC-DC converter electric vehicle multi-input multi-output power electronic converter renewable energy solar energy

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Covert Authentication for Securing MIMO Communications

Covert Authentication for Securing MIMO Communications

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作者： Jeong, Joon-Young Iowa State University

学位级别：M.S., Master of Science/Master of Surgery

This thesis aims to propose a covert authentication scheme that remains obfuscated to eavesdropping attacks by hiding the existence of the authentication tag. The attackers’ endeavor to impersonate a legitimate transmitter can be countered by generating the invisible tag. The essential concept we suggest is to superimpose the low-power tag onto the message such that we can effectively avoid the attention of malicious users. We derive the total detection error probability and demonstrate that it can converge to 1, implying that the tag is not detectable by the malicious users, as the number of transmit antennas increases. Also, the covert tag and authenticated message throughput are obtained and analyzed to see the influence of the number of antennas.

关键词： Authenticated message throughput Covert authentication Covert tag throughput MIMO communication multi-input multi-output

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SEGMENTED MIRROR TELESCOPE MODEL AND SIMULATION

SEGMENTED MIRROR TELESCOPE MODEL AND SIMULATION

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作者： Travis W. Axtell Naval Postgraduate School

学位级别：硕士

The Segmented Mirror Telescope (SMT) housed at the Naval Postgraduate School is a unique, state-of-the-art optical instrument built to explore new technologies needed for future space-based telescopes. A discrete Fourier transform wavefront reconstruction technique developed at Lawrence Livermore National Laboratory is discussed in this thesis as applied to a hexagonal aperture. A Fourier domain implementation of a spatial-frequency modal controller for a simple spring-mass model of a deformable mirror surface is provided by this thesis. This technique avoids more difficult time-domain solutions, is computationally efficient and scalable to much larger multi-input, multi-output systems than the SMT.

关键词： Space telescope Segmented mirror Adaptive optics Wavefront reconstruction Spatial-frequency modal controller multi-input multi-output

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用于5G多波束MIMO系统的先进低温共烧陶瓷封装的39 GHz双信道收发器芯片组

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Engineering 2023年第3期22卷 125-140页

作者：尹宇明 Zhilin Chen 赵晨曦刘辉华吴韵秋 Wen-Yan Yin 康凯 School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310058China

本文介绍了一种用于5G多输入多输出(MIMO)应用的39 GHz收发器前端芯片组。每个芯片包括两个可变增益的频率转换通道,可以同时支持两个独立波束,芯片还集成了一个本地振荡器链和数字模块,用于多芯片扩展和增益状态控制。为了提高射频性能... 详细信息

本文介绍了一种用于5G多输入多输出(MIMO)应用的39 GHz收发器前端芯片组。每个芯片包括两个可变增益的频率转换通道,可以同时支持两个独立波束,芯片还集成了一个本地振荡器链和数字模块,用于多芯片扩展和增益状态控制。为了提高射频性能,对前端系统的关键模块提出了几种电路级改进技术。此外,开发了一种先进的低温共烧陶瓷工艺来封装39 GHz双通道收发器芯片组,实现了低封装损耗和两个发射(TX)/接收(RX)通道之间的高隔离。进行了芯片级和系统级封装(SIP)测量,以演示收发器芯片组的性能。测量结果表明,TX SIP的最大增益为11 dB,饱和输出功率为10 dBm;RX SIP的最大增益为52 dB,噪声系数为5.4 dB,输出压缩点为7.2 dBm。该收发器的单通道通信链路测试表明,64正交调幅(QAM)调制的误差矢量幅度(EVM)为3.72%,频谱效率为3.25 bit·s^(−1)·Hz^(−1);256-QAM调制在1 m距离上的误差矢量幅度(EVM)为3.76%,频谱效率为3.9 bit·s^(−1)·Hz^(−1)。基于该芯片组,还开发了39 GHz多波束原型,用于执行5G毫米波应用的MIMO操作。单流和双流传输的空中通信链路表明,多波束原型机可以覆盖5~150 m的距离,吞吐量相当。

关键词： 5G multi-beam multi-input multi-output Millimeter-wave Transceiver Wireless communication

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A Compact multi-Band MIMO Antenna with High Isolation for C and X Bands Using Defected Ground Structure

A Compact Multi-Band MIMO Antenna with High Isolation for C ...

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作者： Pouyanfar, N. Brno University of Technology

A compact multi-band multi-input multi-output (MIMO) antenna with high isolation is proposed for C and X bands applications. The antenna consists of two trapezoidal-shaped patches printed on FR-4 substrate with a thickness of 1.6 mm and compact size of 17 mm×42 mm. Defected ground structure (DGS) is wisely embedded in antenna body to reduce the mutual coupling between the antenna elements. This modification suitably enhances the isolation by 30dB in C-band extended from 6.6 GHz to 7.6 GHz and by 17 dB in X-band between 8.3 GHz to 10 GHz. Moreover, five meander line rectangular patches are properly included to further improve the mutual coupling and eliminate the antenna size increment, simultaneously. The aforementioned meander lines also improve impedance bandwidth of the antenna as well as impedance matching over the entire frequency band. Close agreement of simulated and measured results confirm the antenna outperformance. Design, simulation, and performance analysis of the proposed antenna is discussed in detail.

关键词： multi-input multi-output Defected Ground Structure (DGS) mutual coupling C band X band

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THE DESIGN OF A LTE/MIMO ANTENNA WITH HIGH ISOLATION USING A DECOUPLING NETWORK

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MICROWAVE AND OPTICAL TECHNOLOGY LETTERS 2014年第9期56卷 2187-2191页

作者： Baek, Jisoo Choi, Jaehoon Hanyang Univ Dept Elect & Comp Engn Seoul 133791 South Korea

A multi-input multi-output (MIMO) antenna with high isolation using a decoupling network for long term evolution (LTE) services is proposed. To improve the isolation, a decoupling network consisting of two sections of a transmission line is placed at the center of two radiating elements. The isolation was enhanced by approximately 23 dB comparing to that without a decoupling network. The fabricated MIMO antenna satisfies a 6-dB return loss requirement and the envelope correlation coefficient is maintained below 0.4 over the LTE band 13 ranging from 746 to 787 MHz. The proposed antenna shows a low specific absorption rate value to meet regulations over the frequency band of interest. (C) 2014 Wiley Periodicals, Inc.

关键词： decoupling network isolation multi-input multi-output long term evolution mobile antennas

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Cut-off rate of multiple antenna systems over frequency-flat, fast fading channels

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IEICE TRANSACTIONS ON COMMUNICATIONS 2006年第4期E89B卷 1440-1442页

作者： Park, S Lee, K Park, SC Korea Adv Inst Sci & Technol Taejon South Korea

For multilevel-coded modulation, the cut-off rate of multiple antenna systems over frequency-flat, fast fading channels is derived. Following Wozencraft's approach, a closed-form expression for the cut-off rate is obtained as a function of energy ratio per dimension It is shown that the maximum value of cut-off rate increases linearly with the number of transmit antennas.

关键词： cut-off rate multi-input multi-output frequency-flat fast fading

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Integration of Photovoltaic-Based Transformerless High Step-Up Dual-output-Dual-input Converter with Low Power Losses for Energy Storage Applications

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ENERGIES 2022年第15期15卷

作者： Aljafari, Belqasem Ramu, Senthil Kumar Devarajan, Gunapriya Vairavasundaram, Indragandhi Najran Univ Coll Engn Dept Elect Engn Najran 11001 Saudi Arabia Sri Krishna Coll Technol Autonomous Dept Elect & Elect Engn Coimbatore 641042 Tamil Nadu India Sri Eshwar Coll Engn Dept Elect & Elect Engn Coimbatore 641202 Tamil Nadu India Vellore Inst Technol Sch Elect Engn Vellore 632014 Tamil Nadu India

The synchronous integration of numerous input and output loads is possible with multi-input (MI) and multi-output (MO) DC-DC converters. In this paper, the non-isolated DC-DC converter described, which has a high step-up capability and multiple ports for outputs and inputs for energy storage system (ESS) applications. The voltage level of the converter is changeable. The capacity to provide the large voltage increases with a low duty cycle portion, the ease with which each duty cycle can be controlled, and minimal power losses are all advantages of the proposed design. The proposed system offers advantages for applications requiring energy storage. In the continuous conduction mode (CCM), the operation principles, steady-state evaluation, and extracting of the voltage and current coefficients are performed. The supply sources can be inserted or withdrawn without causing a cross-regulation issue in the proposed converter. Ultimately, the functionality of the proposed structure is examined using simulation and the laboratory prototype that has been implemented. The proposed converter achieved 94.3% efficiency at maximum power. In addition, the proposed converter attained minimum losses with a difference of 28.5 W when compared to a conventional converter.

关键词： multi-input multi-output step-up converter energy storage DC-DC converter

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Sparsity Adaptive Expectation Maximization Algorithm for Estimating Channels in MIMO Cooperation systems

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KSII TRANSACTIONS ON INTERNET AND INFORMATION SYSTEMS 2016年第8期10卷 3498-3511页

作者： Zhang, Aihua Yang, Shouyi Li, Jianjun Li, Chunlei Liu, Zhoufeng Zhongyuan Univ Technol Sch Elect & Informat Engn Zhengzhou Peoples R China Zhengzhou Univ Sch Informat Engn Zhengzhou Peoples R China

We investigate the channel state information (CSI) in multi-input multi-output (MIMO) cooperative networks that employ the amplify-and-forward transmission scheme. Least squares and expectation conditional maximization have been proposed in the system. However, neither of these two approaches takes advantage of channel sparsity, and they cause estimation performance loss. Unlike linear channel estimation methods, several compressed channel estimation methods are proposed in this study to exploit the sparsity of the MIMO cooperative channels based on the theory of compressed sensing. First, the channel estimation problem is formulated as a compressed sensing problem by using sparse decomposition theory. Second, the lower bound is derived for the estimation, and the MIMO relay channel is reconstructed via compressive sampling matching pursuit algorithms. Finally, based on this model, we propose a novel algorithm so called sparsity adaptive expectation maximization (SAEM) by using Kalman filter and expectation maximization algorithm so that it can exploit channel sparsity alternatively and also track the true support set of time-varying channel. Kalman filter is used to provide soft information of transmitted signals to the EM-based algorithm. Various numerical simulation results indicate that the proposed sparse channel estimation technique outperforms the previous estimation schemes.

关键词： multi-input multi-output one-way relay networks adaptive compressed channel estimation sparsity adaptive expectation maximization amplify-and-forward

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