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检索条件"主题词=Computer algorithms"

共 3274 条记录，以下是3101-3110 订阅

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A Model-Free Algorithm to Safely Approach the Handling Limit of an Autonomous Racecar

A Model-Free Algorithm to Safely Approach the Handling Limit...

引用

International Conference on Connected Vehicles and Expo (ICCVE)

作者： Alexander Wischnewski Johannes Betz Boris Lohmann Chair of Automatic Control Technical University of Munich Munich Germany Chair of Automotive Technology Technical University of Munich Munich Germany

ISBN: (纸本)9781728101439

One of the key aspects in racing is the ability of the driver to find the handling limits of the vehicle to minimize the resulting lap time. Many approaches for raceline optimization assume the tire-road friction coefficient to be known. However, this neglects the fact that the ability of the system to realize such a race trajectory depends on complex interdependencies between the online trajectory planner, the control systems and the non-modelled uncertainties. In general, a high quality control system can approach the physical limit more reliable, as it applies less corrective actions. We present a model-free learning method to find the minimum achievable lap-time for a given controller using online adaption of a scale factor for the maximum longitudinal and lateral accelerations in the online trajectory planner. In contrast to existing concepts, our approach can be applied as an extension to already available planning and control algorithms instead of replacing them. We demonstrate reliable and safe operation for different vehicle setups in simulation and demonstrate that the algorithm works successfully on a full-size racecar.

关键词： Autonomous racing Learning control Model-Free learning control Scale factor Transverse acceleration control systems Limit trajectory Safe handling computer algorithms vehicle coefficient of friction algorithms Drivers

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Feedback Linearization Control Methods for Accurate Leaf Photosynthesis Measurements

Feedback Linearization Control Methods for Accurate Leaf Pho...

引用

American Control Conference

作者： Philip E. Paré Berkley J. Walker Justin McGrath Coordinated Science Laboratory at the University of Illinois at Urbana-Champaign Institute of Plant Biochemistry and the Cluster of Excellence on Plant Science (CEPLAS) Heinrich-Heine University of Dsseldorf Carl R. Woese Institute for Genomic Biology University of Illinois

ISBN: (纸本)9781509045839

Accurate measurements of photosynthesis are vital for understanding the response of our planet to climate change and developing novel strategies for improving food production. Since photosynthesis is sensitive to a myriad of inputs, including temperature, these measurements require precise control to produce meaningful and accurate data. This paper develops a biophysical model of energy balance in a leaf and environmental control system that incorporates plant physiology and the biophysical relationship between a leaf and its environment. This model is then parameterized for a commonly-used device used for measuring leaf photosynthesis. Feedback linearization is applied to this model to design a controller for leaf temperature. The model is validated and the controller is then implemented on actual measurements. The result is a family of more efficient control algorithms built from first-order principles governing the exchange of matter and energy between a leaf and its environment. To the best of our knowledge, this is the first attempt at developing such a control algorithm.

关键词： foliage Photosynthesis energy balance computer algorithms food production feedback linearization control Controllers environmental control systems LEAF TEMPERATURES accuracy control Plant Physiological Phenomena planets Environments

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Design and Implementation of a Predictive Control Strategy for Power Management of a Wireless Sensor Network

Design and Implementation of a Predictive Control Strategy f...

引用

European Control Conference

作者： Olesia Mokrenko Maria Isabel Vergara-Gallego Warody Lombardi Suzanne Lesecq Diego Puschini Carolina Albea Univ. Grenoble Alpes CNRS LAAS

ISBN: (纸本)9781467371605

Technological advances have made wireless sensor nodes cheap and reliable enough to be brought into various application domains. The limited energy capacity of sensor nodes is the key factor that restricts their lifespan. In this paper, a Predictive Control strategy for Dynamic Power Management of a set of wireless sensor nodes is proposed. The control formulation is based on Model Predictive Control with constraints and binary optimization variables, leading to a Mixed Integer Quadratic Programming problem. The proposed control algorithm guarantees services and performances levels with a minimum number of active nodes and/or a minimum load on such components. The strategy is evaluated on a real test-bench with wireless sensor nodes equipped with batteries and harvesting systems. Experimental results show the effectiveness of the proposed control method.

关键词： Wireless sensor networks control strategy Predictive control minimum load Ganglia active nodes energy capacity Control Methods Sensors wireless computer algorithms Batteries Life span

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Design of a Periphery Control FPGA Board for Electric Drive Systems

Design of a Periphery Control FPGA Board for Electric Drive ...

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IEEE Mediterranean Electrotechnical Conference

作者： Reiko Raute Cedric Caruana Cyril Spited Staines Joseph Cilia Mark Sumner Department of Industrial Electrical Power Conversion University of Malta Department of Electrical and Electronic Engineering University of Nottingham

The paper describes the setup of an experimental microprocessor control system for electric drive systems. Particular the design of a customised designed periphery control FPGA board is described in detail. The setup ... 详细信息

ISBN: (纸本)9781424457939

关键词： Field programmable gate arrays microprocessor control drive train Board Sensors computer algorithms control systems electric drives driver control

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QP INITIALIZATION AND INTERVIEW MAD PREDICTION FOR RATE CONTROL IN HEVC-BASED MULTI-VIEW VIDEO CODING

QP INITIALIZATION AND INTERVIEW MAD PREDICTION FOR RATE CONT...

引用

IEEE International Conference on Acoustics, Speech, and Signal Processing

作者： Woong Lim Ivan V. Bajic Donggyu Sim Kwangwoon University Korea Simon Fraser University Canada

ISBN: (纸本)9781479903573

Rate control is an important component of an end-to-end video communication system. Currently, there are several proposals for rate control in the upcoming High Efficiency Video Coding (HEVC) standard, but none specifically for the multi-view extension of the standard. In this paper, we apply one of the HEVC single-view rate control schemes to the multi-view scenario, and propose two improvements. One improvement deals with Quantization Parameter (QP) initialization, and the other deals with interview Mean Absolute Difference (MAD) prediction. Experimental results demonstrate increased accuracy of rate control, reduced fluctuation of instantaneous bitrate, as well as a reduction in PSNR degradation compared to the existing rate control algorithm.

关键词： rate control market abuse MAD LANGUAGE mycophenolic adenine dinucleotide Videotapes Standing Orders Video Communication System computer algorithms

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Closed-loop identification and tracking control of Lagrangian systems under input constraints

Closed-loop identification and tracking control of Lagrangia...

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IEEE Annual Conference on Decision and Control

作者： D. J. Lopez-Araujo Antonio Loria Laboratoire de Signaux et Systemes Supelec CNRS. Plateau de Moulon 91192 Gif sur Yvette France

ISBN: (纸本)9781479978878

In this paper global tracking and parameter convergence are proven for an adaptive control algorithm with independently saturated proportional and derivative terms through a persistency of excitation condition, while guaranteeing the inputs to never reach their natural saturation limit. As far as the authors are aware this is the first work that achieves globally the motion control objective and system identification, avoiding actuator saturation.

关键词： tracking control Lagrangian System identification computer algorithms Saturated Awareness Proportional

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A Textbook of Data Structures and algorithms 3: Mastering Advanced Data Structures and Algorithm Design Strategies

A Textbook of Data Structures and Algorithms 3: Mastering Ad...

引用

2022年

作者： G A Vijayalakshmi Pai

ISBN: (数字)9781394192014

ISBN: (纸本)9781786308924

Data structures and algorithms is a fundamental course in computer Science, which enables learners across any discipline to develop the much-needed foundation of efficient programming, leading to better problem solving in their respective disciplines. A Textbook of Data Structures and algorithms is a textbook that can be used as course

关键词： Data structures (computer science) computer algorithms

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Selective Control Algorithm for N-Phase Switching Power Pole of 4-Leg Interlinking Converter in AC/DC Hybrid Microgrid

Selective Control Algorithm for N-Phase Switching Power Pole...

引用

International Conference on Electrical Machines and Systems (ICEMS)

作者： Mina Kim Bong Yeon Choi Jung-Min Park Kyung-Min Kang Kyoung-Min Choo Chung-Yuen Won Department of Electrical and Computer Engineering Sungkyunkwan Univ Suwon Korea

ISBN: (纸本)9781728133997

This paper proposes a selective control algorithm to reduce switching losses of N-phase switching pole of 3-phase 4-leg interlinking converter (ILC) in AC/DC hybrid microgrid. Unbalanced load connected to 3-phase 4-leg ILC causes unbalanced voltage condition and this problems can be complemented by N-phase switching pole of 4-leg ILC. However, if the switching pole on N is operated constantly regardless of control decision due to unbalanced load conditions, switching loss on the N-phase switching pole will cause power loss in the entire topology. To compensate this problem, selective control algorithm considering voltage unbalance factor (VUF) for N-phase switching pole in ILC is proposed. Proposed algorithm decides switching operation of N-phase switching pole depending on unbalanced load voltage. When occurring unbalanced load condition, voltage unbalance factor can be reduced by proposed control algorithm. At the same time, the current flowing through the N-phase switch pole and switching losses can be reduced.

关键词： AC/DC hybrid microgrid N-phase switching pole 3-phase 4-leg interlinking converter Negative sequence Pole computer algorithms International Labour Conference unbalanced load alternative control ADIPOQ gene negative sequence voltage unbalance Switching losses

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Formation Control of UAVs with a Fourth-order Flight Dynamics

Formation Control of UAVs with a Fourth-order Flight Dynamic...

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IEEE Annual Conference on Decision and Control

作者： Yasuhiro Kuriki Toru Namerikawa Faculty of Science and Technology School of Integrated Design Engineering Keio University Kanagawa Japan

ISBN: (纸本)9781467357159

In this paper, we study cooperative control problems with a multi-UAV system expressed as a fourth-order system using a consensus algorithm. We first show that a linearized model of quadrotors is expressed as a fourth-order system, and then propose a formation control algorithm for the fourth-order system after formulating a problem. The proposed control law is based on a consensus algorithm and a leader-follower structure is also applied to the control law so that a leader can individually provide each of the quadrotors with information of their desired states. And then, we show that the proposed control algorithm can guarantee accurate formation keeping when fundamental assumptions about the network composed of the multiple UAVs are satisfied. Finally, the proposed approach is validated by some simulations.

关键词： computer algorithms control law Unmanned Aerial Vehicle Flight dynamics Instruction repertory coordinated control

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A distributed control algorithm for the minimization of the power generation cost in smart micro-grid

A distributed control algorithm for the minimization of the ...

引用

IEEE Annual Conference on Decision and Control

作者： Guido Cavraro Ruggero Carli Sandro Zampieri Dept. of Information Engineering University of Padova Via Gradenigo 6/a 35131 Padova Italy

ISBN: (纸本)9781467360890

We consider the problem of minimizing the power generation cost by exploiting the distributed renewable energy sources (DRES) located in the power distribution network. The proposed strategy requires that the intelligent agents, located at the microgenerator buses, measure their voltage and then adjust the amount of injected power, according to a feedback control law that is indeed a projected gradient descent strategy. Simulations are provided in order to illustrate the algorithm behavior.

关键词： Power production decentralised control Power grids Intelligent agents MICRO-GRID microgenerator control law computer algorithms

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