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2012 13th Biennial Baltic Electronics Conference, BEC 2012

作者： Udal, A. Reeder, R. Ikonic, Z. Harrison, P. Velmre, E. Department of Computer Control TUT Ehitajate tee 5 19086 Tallinn Estonia Department of Electronics TUT Ehitajate tee 5 19086 Tallinn Estonia School of Electronics and Electrical Engineering University of Leeds LS2 9JT United Kingdom

ISBN: (纸本)9781467327749

Quantum cascade lasers are the sophisticated modern semiconductor devices of quantum electronics needed for coherent radiation generation in mid infrared and terahertz regions. The development of respective simulation software needs special efforts of quantum and software engineering to make the simulation tools usable not only on powerful computer clusters but also on desktop computers. The present short paper and the corresponding conference presentation discuss the development of desktop simulator SCLSIM1 for mid-infrared AlGaAs/GaAs quantum cascade laser structures. © 2012 IEEE.

关键词： Quantum cascade lasers

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Event detection in composite context aware-service

Event detection in composite context aware-service

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3rd International Conference on Ubiquitous and Future Networks, ICUFN 2011

作者： Na, Woongsoo Cho, Sungrae Kim, Eungha Choi, Youngil School of Computer Engineering and Science Chung-Ang University 221 Heukseok Dongjak Seoul Korea Republic of Cognitive Service Control Research Team Internet Service Research Department Electronics and Telecommunications Research Institute 138 Gajeongno Yuseong-gu Daejeon Korea Republic of

ISBN: (纸本)9781457711763

Recent computing paradigm will advance in a form of more user-centric services spurred by smart phone where smart phone users enjoy a large variety of contextual information. Under the context-aware domain, contexts are forming more complicated and thus the concept of composite context has been proposed. While providing a useable context to users is important, it is also essential to reserve such a composite context even if it is not available. Once the context is available to user, there should be a methodology maintained to alarm the user of its existence. In this paper, we propose new event detection architecture for new composite system. In the later part of the paper, we provide two case studies using the proposed event detection architecture: video streaming service and office automation service. © 2011 IEEE.

关键词： Information services

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Design of robust iterative learning control schemes in a finite frequency range

Design of robust iterative learning control schemes in a fin...

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2011 7th International Workshop on Multidimensional (nD) Systems, nDS 2011

作者： Paszke, Wojciech Rogers, Eric Galkowski, Krzysztof Institute of Control and Computation Engineering University of Lifelon Góra URL Podgórna 50 65-246 Lifelon Góra Poland School of Electronics and Computer Science University of Southampton Southampton SO17 1BJ United Kingdom

ISBN: (纸本)9781612848167

Iterative learning control has been especially developed for systems defined over a finite duration that repeat the same task. Each execution is known as a trial, or pass, and the sequence of operations is that a trial is completed, the system is then reset to the starting location, and the next pass begins. The novel feature of this control law design method is to use information from the previous pass, or a finite number of previous passes, to update the control input applied on the next pass and thereby improve performance from pass-to-pass. Iterative learning control has an inherent two-dimensional systems structure since the dynamics evolve in two independent directions. In this paper, the repetitive process structure is exploited to develop a controller design algorithm that produces both a stabilizing feedback controller in the time domain and a feedforward controller that guarantees convergence in the pass-to-pass domain for all admissible uncertainties. Using the Generalized Kalman-Yakubovich-Popov lemma, controller design is performed over a finite frequency range. A major advantage of this new algorithm lies in the fact that it can be computed using linear matrix inequality software without incurring unacceptable computing cost. © 2011 IEEE.

关键词： Linear matrix inequalities

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Deep learning for object detection and grasping: A survey

Deep learning for object detection and grasping: A survey

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2018 IEEE International Conference on Information and Automation, ICIA 2018

作者： Jia, Qun Cai, Jun Cao, Zhiqiang Wu, Yelan Zhao, Xionglei Yu, Junzhi State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing100190 China University of Chinese Academy of Sciences Beijing101408 China School of Computer and Information Engineering Beijing Technology and Business University Beijing100048 China

ISBN: (纸本)9781538680698

Detecting and grasping objects in unstructured environments is an important yet difficult task. Fortunately, the breakthroughs from deep convolutional networks stimulate the development of object detection and grasping. The survey aims to serve as a comparison for region-based and region-free detection framework based on deep learning, and supplies the latest research results of object grasping with deep learning. Firstly, we briefly analyze the object detection and grasping. Then, the representative object detection methods based on deep learning are overviewed. Thirdly, we introduce the application of convolutional neural networks in object grasping. Finally, the potential trends in object detection and grasping based on deep learning are discussed. © 2018 IEEE.

关键词： Object detection

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Bio-inspired micro air vehicle: Design and control issues

Bio-inspired micro air vehicle: Design and control issues

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作者： Ratti, Jayant Goel, Rohan Kim, Seong-Joo Moon, Jung-Ho Pappas, Thomas D. Vachtsevanos, George Roemer, Mike Georgia Institute of Technology Atlanta GA 30332 United States Impact Technologies LLC Rochester NY 14623 United States School of Electrical and Computer Engineering United States Kangnung National University Korea Republic of Intelligent Control Systems Laboratory United States

ISBN: (纸本)9781600867439

Missions envisioned for Micro Air Vehicles (MAVs) such as Intelligence, Surveillance and Reconnaissance (ISR) in urban environments require exceptional agility. These missions typically involve flight through or in close proximity to buildings, tunnels and trees, and require the MAVs to maneuver using sharp dives and climbs along with small-radius turns. The small size of MAVs allows such flight operations within confined space but the control effectors must provide sufficient maneuverability, while maintaining stability, with only limited sensing capability onboard the platform. To meet these challenges, researchers have long been attracted by the amazing attributes of biological systems, such as those exhibited by birds and insects. Birds can fly in dense flocks, executing rapid maneuvers with g-loads far in excess of modern fighter aircrafts, and yet never collide with each other, despite the absence of air traffic controllers. This paper introduces a novel framework for the design and control of a Micro Air Vehicle. The vehicle's conceptual design is based on biologically-inspired principles and emulates a dragonfly (Odonata-Anisoptera). The author is borrowing flight mechanism features from the dragonfly and merging them with indigenous designs in creating a novel version of a Flapping Wing MAV, called the QV. The QV design incorporates the simplicity of mechanical construction and the complexity of a sophisticated multi-layered Hybrid & Linear / Non-Linear controller to achieve extended flight times and improved agility compared to other Rotary and Flapping Wing MAV designs. The paper talks about the design and control features of the proposed QV design and gives an overview on the developmental efforts been made towards the prototyping of the QV flyer. The potential applications for such a high endurance vehicle are numerous, including air-deployable mass surveillance in cluster and swarm formations. The disposability of the vehicle would help in battle-field

关键词： Birds

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Data-Driven Modeling and Analysis of Dynamic Wake for Wind Farm control: A Comparison Study

Data-Driven Modeling and Analysis of Dynamic Wake for Wind F...

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2020 Chinese Automation Congress, CAC 2020

作者： Chen, Zhenyu Doekemeijer, Bart M Lin, Zhongwei Xie, Zhen Si, Zongming Liu, Jizhen Wingerden, Jan-Willem Van State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of Control Computer and Engineering North China Electric Power University Beijing China Delft University of Technology Netherlands New Energy Co. Ltd Jinan250099 China

ISBN: (纸本)9781728176871

For the study of wind farm and wake effect, the steady-state wake models like FLORIS were proposed and used during wind farm operations to achieve higher wind power utilization and conversion. However, the dynamic performance of the wake should also be involved in favor of better optimizations. In this paper, a data-driven analysis and modeling method, dynamic mode decomposition (DMD), is used to construct dynamic flow model with high-fidelity flow data. Two DMD-derived models are constructed based on flow data in three-dimensional and two-dimensional spaces, respectively. The obtained models and respective flows are compared in the time and frequency domain. Results show that both models have apparent differences in the frequency domain, but the dominant wake characteristics' consistency is maintained. © 2020 IEEE.

关键词： Dynamic mode decomposition

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Event-Triggered control for Consensus of Multi-Agent Systems with Nonlinear Output and Directed Topologies

Event-Triggered Control for Consensus of Multi-Agent Systems...

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第三十八届中国控制会议

作者： Xinlei Yi Shengjun Zhang Tao Yang Junfeng Wu Karl H.Johansson School of Electrical Engineering and Computer Science KTH Royal Institute of Technology The Department of Electrical Engineering University of North Texas The College of Control Science and Engineering Zhejiang University

We propose a distributed event-triggered control law to solve the consensus problem for multi-agent systems with nonlinear output. Under the condition that the underlying digraph is strongly connected, we establish sufficient conditions on the nonlinear output function and initial states to guarantee that the event-triggered controller realizes consensus. Then the results are extended to the case where the underlying directed graph contains a directed spanning tree. These theoretical results are illustrated by numerical simulations.

关键词： Consensus Event-triggered control Multi-agent systems Nonlinear output

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Data-Efficient control Barrier Function Refinement

arXiv

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arXiv 2023年

作者： Dai, Bolun Huang, Heming Krishnamurthy, Prashanth Khorrami, Farshad Control/Robotics Research Laboratory Electrical & Computer Engineering Department Tandon School of Engineering New York University BrooklynNY11201 United States

control barrier functions (CBFs) have been widely used for synthesizing controllers in safety-critical applications. When used as a safety filter, it provides a simple and computationally efficient way to obtain safe controls from a possibly unsafe performance controller. Despite its conceptual simplicity, constructing a valid CBF is well known to be challenging, especially for high-relative degree systems under nonconvex constraints. Recently, work has been done to learn a valid CBF from data based on a handcrafted CBF (HCBF). Even though the HCBF gives a good initialization point, it still requires a large amount of data to train the CBF network. In this work, we propose a new method to learn more efficiently from the collected data through a novel prioritized data sampling strategy. A priority score is computed from the loss value of each data point. Then, a probability distribution based on the priority score of the data points is used to sample data and update the learned CBF. Using our proposed approach, we can learn a valid CBF that recovers a larger portion of the true safe set using a smaller amount of data. The effectiveness of our method is demonstrated in simulation on a unicycle and a two-link arm. © 2023, CC BY.

关键词： controllers

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Modeling and control of rate-dependent hysteresis in piezoelectric actuators

Modeling and control of rate-dependent hysteresis in piezoel...

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Chinese control Conference (CCC)

作者： Guilin Zhang Chengjin Zhang Jason Gu School of Control Science and Engineering Shandong University Jinan China School of Mechanical Electrical and Information Engineering Shandong University at Weihai Weihai China Electrical and Computer Engineering Dalhousie University Halifax Canada

Piezoelectric actuators show dependency of the output displacement on the rate of change of the applied input voltage. In this paper, a rate-dependent Prandtl-Ishlinskii model is developed to characterize the time-dependent hysteresis in the piezoelectric actuators. This model employs the dynamic threshold and weighting values formulated on the speed of the input voltage. The validation of the rate-dependent Prandtl-Ishlinskii model is demonstrated by comparing its out responses with the measured responses obtained for a piezoelectric actuator under different input frequencies. Finally, a feedforward controller with an inverse rate-dependent Prandtl-Ishlinskii model is designed to account for the dynamic hysteresis. The results show that the hysteresis nonlinearities are significantly reduced at both the lower and higher frequencies.

关键词： Hysteresis Piezoelectric actuators Frequency measurement Feedforward neural networks Voltage measurement Computational modeling

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A software-defined security middle platform architecture 22

A software-defined security middle platform architecture

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5th International Conference on computer Science and Software engineering, CSSE 2022

作者： Qiu, Rixuan Qin, Yongtai Li, Yuancheng Zhou, Xin Fu, Junfeng Li, Wei Yan, Juan Shi, Jie State Grid Jiangxi Information & Telecommunication Company China School of Control and Computer Engineering North China Electric Power University China State Grid Jiangxi Electric Power Company Yingtan Power Supply Branch China Co. Ltd. China

ISBN: (纸本)9781450397780

In recent years, with the increase in the variety of communication devices, as well as the rapid development of the Internet of Things, edge computing, and machine learning, the existing security solutions can neither solve the problem of increasing fragmentation of security needs and security scenarios, nor the problem of the mismatch between security protection means and business scenarios, so the new software-defined security middle platform architecture is proposed. The infrastructure plane is connected to the architecture through network function virtualization. The security middle platform has the advantages of both the data middle platform and the business middle platform is designed to solve the fragmentation problem. Hybrid cloud environment is designed according to the cost, expansion, and security requirements. The control plane solves the matching problem for the middle platform resource pool through flexible and intelligent scheduling. The small forward platform design of the application plane further reduces the development cost. © 2022 ACM.

关键词： Network function virtualization

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