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2011 American control Conference (ACC)

作者： Jie Mei Wei Ren Guangfu Ma Department of Control Science and Engineering Harbin Institute of Technology Heilongjiang China Department of Electrical and Computer Engineering Utah State University Logan UT USA

In this paper, we study the distributed containment control problem for networked Lagrangian systems with multiple stationary or dynamic leaders in the presence of parametric uncertainties under a directed graph that characterizes the interaction among the leaders and the followers. When the leaders are stationary, a distributed adaptive control algorithm is proposed. We present a necessary and sufficient condition on the directed graph such that all followers converge to the stationary convex hull spanned by the stationary leaders asymptotically. As a byproduct, we show a necessary and sufficient condition on leaderless consensus for networked Lagrangian systems under a directed graph. When the leaders are dynamic, two cases are considered: i) The leaders have constant vectors of generalized coordinate derivatives;ii) The leaders have varying vectors of generalized coordinate derivatives. In the first case, we propose a distributed continuous estimator and a distributed adaptive control algorithm. In the second case, we propose a distributed adaptive control algorithm combined with distributed sliding-mode estimators. In both cases, a necessary and sufficient condition on the directed graph is presented such that all followers converge to the dynamic convex hull spanned by the dynamic leaders asymptotically.

关键词： Lead Heuristic algorithms Uncertainty Adaptive control Symmetric matrices Eigenvalues and eigenfunctions Vehicle dynamics

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A compatible energy-saving control algorithm for a class of conflicted multi-objective control problem

A compatible energy-saving control algorithm for a class of ...

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Congress on Evolutionary Computation

作者： Lihong Xu Qingsong Hu Erik D. Goodman Department of Control Science and Engineering University of Tongji Shanghai China Department of Electrical and Computer Engineering Michigan State University East Lansing MI USA

A new two-layer multi-objective compatible control algorithm is proposed for a class of control problems with two conflicting control objectives, control error and energy consumption. The first layer is devoted to obtaining a user's desired controlled objectives region, assured to be not only achievable but also Pareto-optimal. The second layer is devoted to designing an effective controller by optimizing the most important controlled objective (such as the energy consumption), subject to system constraints from the controlled objectives region in the first layer. This control algorithm provides an effective robust controller design method for multi-objective control problems with precise models and uncertain initial conditions. Simulations illustrate that the two-layer multi-objective compatible control (MOCC) algorithm has some advantages over traditional multi-objective control methods.

关键词： control systems Energy consumption Error correction Hydrogen Humidity Temperature control Heating Spraying Constraint optimization Costs

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Wavelet transform based power transmission line fault location using GPS for accurate time synchronization

Wavelet transform based power transmission line fault locati...

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Annual Conference of Industrial Electronics Society

作者： Gi-Taek Kim Hyuck-Soo Kim Hmg-Yong Choi Department of Electrical and Computer Engineering Kangwon University Chuncheon Kangwon South Korea Department of Control Engineering Kangwon University Chuncheon Kangwon South Korea

A continuous and reliable electrical energy supply is the objective of any power system operation. A transmission line is the part of the power system where faults are most likely to happen. This paper describes the use of the wavelet transform for analyzing power system fault transients in order to determine the fault location. Synchronized sampling was made possible by precise time receivers based on GPS time reference, and the sampled data were analyzed using wavelet transform. This paper describes a fault location monitoring system and fault locating algorithm with GPS, DSP processor, and data acquisition board, and presents some experimental results and error analysis.

关键词： Wavelet transforms Power transmission lines Fault location Power system reliability Power system faults Power system transients Continuous wavelet transforms Power system analysis computing Wavelet analysis Global Positioning System

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Nonlinear approximations using elliptic basis function networks

Nonlinear approximations using elliptic basis function netwo...

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IEEE Conference on Decision and control

作者： Jooyoung Park I.W. Sandberg Department of Control & Instrumentation Engineering Korea University ChungNam South Korea Department of Electrical and Computer Engineering University of Texas Austin Austin TX USA

Sharp conditions are given under which real-valued functions of several real variables can be approximated arbitrarily well by finite linear combinations of elliptic basis functions. Also given is a related result con... 详细信息

关键词： Ear Radial basis function networks Wavelet transforms Vectors Electric variables control Instruments control system synthesis USA Councils Smoothing methods Hilbert space

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Robust intrinsic and extrinsic calibration of RGB-D cameras

arXiv

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arXiv 2017年

作者： Basso, Filippo Menegatti, Emanuele Pretto, Alberto IT+Robotics Department of Information Engineering University of Padua Italy Department of Computer Control and Management Engineering "Antonio Ruberti" Sapienza University of Rome Italy

Color-depth cameras (RGB-D cameras) have become the primary sensors in most robotics systems, from service robotics to industrial robotics applications. Typical consumer-grade RGB-D cameras are provided with a coarse intrinsic and extrinsic calibration that generally does not meet the accuracy requirements needed by many robotics applications (e.g., highly accurate 3D environment reconstruction and mapping, high precision object recognition and localization,...). In this paper, we propose a human-friendly, reliable and accurate calibration framework that enables to easily estimate both the intrinsic and extrinsic parameters of a general color-depth sensor couple. Our approach is based on a novel two components error model. This model unifies the error sources of RGB-D pairs based on different technologies, such as structured-light 3D cameras and time-of-flight cameras. Our method provides some important advantages compared to other state-of-the-art systems: it is general (i.e., well suited for different types of sensors), based on an easy and stable calibration protocol, provides a greater calibration accuracy, and has been implemented within the ROS robotics framework. We report detailed experimental validations and performance comparisons to support our statements. Copyright © 2017, The Authors. All rights reserved.

关键词： Cameras

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When Smoothness is Not Enough: Toward Exact Quantification and Optimization of the Price-of-Anarchy

When Smoothness is Not Enough: Toward Exact Quantification a...

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IEEE Annual Conference on Decision and control

作者： Rahul Chandan Dario Paccagnan Jason R. Marden Department of Electrical and Computer Engineering Center of Control Dynamical Systems and Computation UC Santa Barbara USA Department of Mechanical Engineering Center of Control Dynamical Systems and Computation UC Santa Barbara USA

ISBN: (数字)9781728113982

ISBN: (纸本)9781728113999

Today's multiagent systems have grown too complex to rely on centralized controllers, prompting increasing interest in the design of distributed algorithms. In this respect, game theory has emerged as a valuable tool to complement more traditional techniques. The fundamental idea behind this approach is the assignment of agents' local cost functions, such that their selfish minimization attains, or is provably close to, the global objective. Any algorithm capable of computing an equilibrium of the corresponding game inherits an approximation ratio that is, in the worst case, equal to its price-of-anarchy. Therefore, a successful application of the game design approach hinges on the possibility to quantify and optimize the equilibrium *** this end, we introduce the notion of generalized smoothness, and show that the resulting efficiency bounds are significantly tighter compared to those obtained using the traditional smoothness approach. Leveraging this newly-introduced notion, we quantify the equilibrium performance for the class of local resource allocation games. Finally, we show how the agents' local decision rules can be designed in order to optimize the efficiency of the corresponding equilibria, by means of a tractable linear program.

关键词： Games Resource management Cost function Multi-agent systems Approximation algorithms control systems Nash equilibrium

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Staircase aperture loaded MPA for (B41/n41) Sub-6 GHz for 5G domain

Staircase aperture loaded MPA for (B41/n41) Sub-6 GHz for 5G...

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2020 International Conference engineering and Telecommunication, En and T 2020

作者： Dwivedi, Ajay Kumar Tripathi, Pramod Narayan Yadav, Shekhar Singh, Vivek Nazarov, Alexey Indian Institute of Information Technology Allahabad Department of Electronics and Communication Uttar Pradesh Prayagraj India Moscow Institute of Physics and Technology Department of Radio Engineering and Cybernetics Moscow Russia University of Allahabad Department of Electronics and Communication Uttar Pradesh Prayagraj India Russian Academy of Science Department of Computer Science and Control Moscow Russia

ISBN: (纸本)9781728188294

This article showcases the design and analysis of a staircase aperture loaded microstrip patch antenna (MPA) of dimension 28x23x1.6 mm3. The modelling and simulation are performed using Ansoft HFSS 18. The proposed antenna design operates at two different frequency bands i.e. 2.2 GHz - 2.4 GHz and 5.05 GHz - 5.62 GHz, covering the important bands of Sub-6 GHz frequencies for 5G outdoor applications with dual polarization characteristics. The CP is observed at the higher frequency band i.e. from 5.25 GHz - 5.50 GHz by modifying the ground plane. The proposed design has been verified by validating the simulated results with the measured results using an anechoic chamber. A positive value of gain and radiation efficiency greater than 90% is observed at both the resonating frequencies. © 2020 IEEE.

关键词： Radiation efficiency

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Evaluating the Reliability of Integer Multipliers With Respect to Permanent Faults

Evaluating the Reliability of Integer Multipliers With Respe...

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IEEE Design and Diagnostics of Electronic Circuits and Systems (DDECS)

作者： Nikolaos I. Deligiannis Riccardo Cantoro Matteo Sonza Reorda S. E. D. Habib Department of Control and Computer Engineering (DAUIN) Politecnico di Torino Turin Italy Department of Electronics and Electrical Communications Engineering Cairo University Giza Egypt

Arithmetic circuits form the foundation of modern digital computation, enabling us to conduct precise mathematical operations and drive the digital age. They are integral components in nearly every digital circuit, such as processors' arithmetic and logic units. Especially in safety-critical domains like automotive and aviation, the flawless operation of these circuits is of paramount importance. This paper presents a case study involving two variants of Dadda multipliers and assesses their intrinsic reliability when affected by permanent hardware faults. We conducted extensive fault injection campaigns on the circuit models under various datasets, presenting the aggregated statistical errors in the form of the mean absolute error (MAE) for each case. Specifically, we performed fault injection campaigns in which the operands are sourced from trained quantized weights of a convolutional neural network, as well as randomly generated sets of integers. The results not only reveal differences between the two circuits but also show significant variations when different datasets are used in the fault injection campaigns.

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Trajectory Shaping by the U-Parameter Design Method

Trajectory Shaping by the U-Parameter Design Method

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American control Conference (ACC)

作者： Peter Dorato Yang Wei Chun-Lin Shen Department of Electrical and Computer Engineering University of New Mexico Albuquerque NM USA Department of Automatic Control Engineering Nanjing Aeronautical Institute Nanjing China

This paper is concerned with the application of U-parameter design method to a problem of "trajectory shaping." Three linearized models are assumed for an unpowered vehicle with modelling errors introduced by variations in flight path angle. Corresponding to the three linearized models, three controllers, which are used in different flight phase, are designed by U-parameter theory. The three controllers guarantee that the vehicle motion, during its approach to target point, is robustly stable and is optimal at the nominal flight path in the sense that the step error response of resultant feedback control system is minimal in the mean square sense. Digital simulation results show that U-parameter design method can be successfully used to the problem

关键词： Design methodology Robust control Feedback control Automatic control Error correction control systems Target tracking Transfer functions Space vehicles computer vision

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Outdoor vehicle and shadow segmentation by temporal edge density information of adjacent frames

Outdoor vehicle and shadow segmentation by temporal edge den...

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International Conference on Electrical engineering/Electronics, computer, Telecommunications and Information Technology, ECTI-CON

作者： Chanchai Techawatcharapaikul Pakorn Kaewtrakulpong Supakorn Siddhichai Department of Computer Engineering Thailand Department of Instrumentation and Control System Engineering Facaulty of Engineering King Mongkut's University of Technology Bangkok Thailand National Electronics and Computer Technology Center NECTEC Pathum Thani Thailand

The problem of vehicle detection and segmentation in outdoor scenes is tackled. Vehicle shadows pose problems in vehicle segmentation step. In this paper, it is proposed to employ temporal edge density information as prior knowledge to distinguish moving vehicle from moving shadow and background in a traffic surveillance system. Experimental results showed good moving vehicle segmentation performance. The proposed approach is currently limited to free-flowing traffic scenes.

关键词： Image edge detection Vehicles Image color analysis Image segmentation Pixel Accuracy computer integrated manufacturing

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