检索结果-内蒙古大学图书馆

PCDH-based nonlinear H∞control of VSC-HVDC with wind power integrated

Journal of control and Decision 2021年第1期8卷 41-49页

作者： Xingyu Lv Bangjun Lei Shumin Fei Foreign language Teaching Center Guizhou Institute of TechnologyGuiyangPeople’s Republic of China Key Laboratory of Power Dig Data of Guizhou Province School of Electrical and Information EngineeringGuizhou Institute of TechnologyGuiyang 550003People’s Republic of China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationSchool of AutomationSoutheast UniversityNanjingPeople’s Republic of China

Based on the port-controlled dissipative Hamiltonian(PCDH)system,a novel nonlinear(NN)H∞control is designed for the wind farm side(WFS)voltage source converter(VSC)of VSC-based high-voltage direct current(VSC-HVDC)transmission system connected large wind ***,the uncertain nonlinear dynamical model of WFS VSC in the VSC-HVDC is established by taking external disturbances and parameter variations into ***,the dissipative Hamiltonian structure of the WFS VSC system is constructed by means of variable ***,on the basis of the obtained dissipative Hamiltonian structure,a NN H∞control is put ***,the simulation results show that the proposed NN H∞control gains the advantage over the interconnection and damping assignment passivity-based(IDA-PB)control.

关键词： VSC-HVDC large wind farm Hamiltonian function method nonlinear H∞control

来源：评论

学校读者我要写书评

暂无评论

Application of Rna Genetic Algorithm Based on Gradient Descent in Function Optimization and engineering Optimization

SSRN

引用

SSRN 2023年

作者： Wu, Qiuxuan Chen, Mingming Zhao, Zikai Chi, Xiaoni Luo, Yanbin Zeng, Pingliang Zhang, Botao Wang, Jian Zhilenkov, Anton A. Chepinski, Sergey A. Institute of Electrical Engineering School of Automation Hangzhou Dianzi University Hangzhou China HDU-ITMO Joint Institute Hangzhou Dianzi University Hangzhou China Institute of Hydrodynamics and Control Processes Saint-Petersburg State Marine Technical University Saint Petersburg Russia Faculty of Control Systems and Robotics ITMO University Saint Petersburg Russia

In engineering optimization problems, most are function optimization problems. RNA genetic algorithmhas apparent advantages in function optimization but has low accuracy and is easy to fall into local *** paper proposes an RNA genetic algorithm based on gradient descent. Gradient descent is used as amutation operator to improve the local development ability of the algorithm. Inspired by the inner-loopstructure of RNA molecules, we designed an inner-loop crossover operator and an inner-loop mutationoperator to improve the global exploration ability of the algorithm in the early stage of evolution and theability to jump out of the local extremum. The algorithm uses an RNA genetic algorithm to find individualsnear the optimal region in the pre-evolutionary stage and performs gradient descent variation on theseindividuals in the post-evolutionary stage to improve the quality of the solution. In addition, this algorithmuses the adaptive gradient descent method to alleviate the oscillation in the gradient descent process anduses the niche punishment method to deal with complex constraints. The algorithm is tested on 17benchmark functions and compared with other optimization algorithms, indicating that the algorithm hasbetter performance. Finally, Adam RNA-GA is used to solve four engineering design problems, and theresults obtained show that the algorithm has high solution accuracy. © 2023, The Authors. All rights reserved.

关键词： Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

Ground maneuver for front-wheel drive aircraft via deep reinforcement learning

引用

Chinese Journal of Aeronautics 2021年第10期34卷 166-176页

作者： Hao ZHANG Zongxia JIAO Yaoxing SHANG Xiaochao LIU Pengyuan QI Shuai WU School of Automation Science and Electrical Engineering Bcihcmg UniversityBeijing 100083China Research Institute for Frontier Science Beihang UniversityBeijing 1000H3China Science and Technology on Aircraft Control Laboratory Beihang UniversityBeijing 100083China Key Laboratory of Advanced Aircraft Systems(Beihang University) Ministry of Industry and Information TechnologyBeijing 100083China Ningbo Institute of Technology Beihang UniversityNingbo 315800China The State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang University.Hangzhou 310027China

The maneuvering time on the ground accounts for 10%–30%of their flight time,and it always exceeds 50%for short-haul aircraft when the ground traffic is *** also contribute significantly to emissions,fuel burn,and noise when taxiing on the ground at *** is an urgent need to reduce aircraft taxiing time on the ***,it is too expensive for airports and aircraft carriers to build and maintain more runways,and it is space-limited to tow the aircraft fast using *** drive capability is currently the best solution for aircraft,which can save the maneuver time for *** idea is proposed that the wheels are driven by APU-powered(auxiliary power unit)motors,APU is working on its efficient point;consequently,the emissions,fuel burn,and noise will be reduced *** Front-wheel drive aircraft,the front wheel must provide longitudinal force to tow the plane forward and lateral force to help the aircraft make a *** traction effects the aircraft’s maximum turning ability,which is difficult to be modeled to guide the controller *** reinforcement learning provides a powerful tool to help us design controllers for black-box models;however,the models of related works are always simplified,fixed,or not easily modified,but that is what we care about *** with complex models can the trained controller be ***-fidelity models that can easily modified are necessary for aircraft ground maneuver controller *** paper focuses on the maneuvering problem of front-wheel drive aircraft,a high-fidelity aircraft taxiing dynamic model is established,including the 6-DOF airframe,landing gears,and nonlinear tire force model.A deep reinforcement learning based controller was designed to improve the maneuver performance of front-wheel drive *** is proved that in some conditions,the DRL based controller outperformed conventional look-ahead controllers.

关键词： Front-wheel drive aircraft Ground maneuver Nose wheel steering Tire model Magic equation Deep reinforcement learning

来源：评论

学校读者我要写书评

暂无评论

A Modified Method of an Inverse Neural and Adaptive Correction Factor for Speed control of DC Motor

A Modified Method of an Inverse Neural and Adaptive Correcti...

引用

2019 Imam Al-Kadhum International Conference for Modern Applications of Information and Communication Technology, MAICT 2019

作者： Waheed, Ali Reyadh Hussain Issa, Abbas Hassan, Mohammed Y. M.Sc. Electronics Engineering Department of Electrical Engineering University of Technology Baghdad Iraq PhD. Control and Automation Engineering Department of Electrical Engineering University of Technology Baghdad Iraq Department of Control and Systems Engineering University of Technology Baghdad Iraq

This Article Proposes a modified method of adaptive controlling for the DC motor and it is deriver circuit based on Inverse Neural controller. The proposed controller composed of two parts: the first is the inverse neural control that will control the speed of the direct current motor and, the second is adaptive correction factor that will act as an adaptive compensator to overcome the error (offset) in the steady state response of the motor (eliminate the steady state error). The obtained results prove that the new method successfully controlled the DC motor speed by eliminating the error in the steady state response, and letting the output correctly tracking the input set-point with minimum rising time and minimum peak overshoot. Simulation done using MATLAB SIMULINK. Results compared with the conventional Inverse Neural controller to demonstrate the impact of the proposed method also a load test had been done. © Published under licence by IOP Publishing Ltd.

关键词： DC motors

来源：评论

学校读者我要写书评

暂无评论

Research on Path Planning Algorithm Based on D* Search

Research on Path Planning Algorithm Based on D* Search

引用

Ocean Studies (ICOS), International Conference on

作者： Jiajun Leng Li Fu Lingling Wang Ning Tang Laboratory of Science and Technology on Marine Navigation and Control China State Shipbuilding Corporation Beijing 100036 China Tianjin Navigation Instruments Research Institute Tianjin China School of Automation Science and Electrical Engineering Beihang University Beijing China Department of Automatic control systems Bauman Moscow State Technical University Moscow Russia

Path planning algorithms are current research hotspots. Heuristic algorithms that can solve dynamic environment problems are gradually becoming the mainstream research direction. The D* algorithm, as one of the new heuristic algorithms, has the advantages of being more computationally efficient than the A * algorithm and being able to solve dynamic problems, and has played an important role in two-dimensional path planning projects such as the NASA Mars rover. But its theoretical research and practical application in 3D environment are very rare. In this context, this paper carries out an in-depth study of the path planning problem based on the D* algorithm, and completes the theoretical derivation and simulation process in 2D and 3D environments. In this paper, a complex random 2D map is established by random generation, and the simulation of D* algorithm is realized on the map with the help of Python language, which realizes the finding of the relative optimal path. Then, in order to study the feasibility of D* solving in 3D environment, the simulation of D* algorithm under 3D map is realized with the help of Python and Unity3d. The research results show that the simulation results are good, which is valuable for the theoretical research and practical application of heuristic algorithms, and plays a role in the application of robot path planning algorithms.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Dragonfly Optimization-based MPPT Algorithm for Standalone PV System under Partial Shading

Dragonfly Optimization-based MPPT Algorithm for Standalone P...

引用

2021 IEEE International Conference on Emergency Science and Information Technology, ICESIT 2021

作者： Lodhi, Ehtisham Yang, Pu Wang, Lina Khan, M. Adil Lodhi, Zeeshan Javed, Usman Saleem, Qasim School of Automation Science and Electrical Engineering Beihang University Beijing100191 China SKL for Management and Control of Complex Systems Institute OfAutomation Chinese Academy of Sciences Beijing100190 China Chang'an University Department of Computer and Technology Xi'an710062 China COMSATS University Department of Electrical and Computer Engineering Islamabad22060 Pakistan Lahore54000 Pakistan

ISBN: (纸本)9781665435314

Currently, Photovoltaic (PV) technology has higher demand in the market and gaining momentum day by day. However, partial shading is the most significant concern as it reduces the efficiency of standalone PV systems. Partially shading is typically induced by non-uniform sunlight and uncertain temperature fluctuations. The maximum power point tracking (MPPT) algorithms play a major role in determining the overall system's efficiency. The PV system creates several peaks in its power voltage (P-V) characteristic curve under partial shadowing. To make the PV system run under partial shading at global maximum power point (GMPP), the dragonfly optimization (DFO) algorithm is put forward in this research article. The proposed DFO technique and other commonly used MPPT techniques, such as Particle swarm optimization (PSO), Perturb and Observe (PO), is investigated through theoretical analysis and simulation using Matlab/Simulink to authenticate the overall performance of the DFO approach under partial shading. Furthermore, the comparison demonstrates that the suggested DFO strategy provides very high reliability, efficiency, robustness, rapid power tracking and lower response time to trace the GMPP than PSO and PO techniques. Hence, the DFO technique's overall performance under partial shading is appropriate and satisfying. © 2021 IEEE.

关键词： Simulink

来源：评论

学校读者我要写书评

暂无评论

A Comparison Analysis between Two and Three Levels Inverter to Grid-Connected Used the Photovoltaic System

A Comparison Analysis between Two and Three Levels Inverter ...

引用

Electronics, Energy and Measurement (IC2EM), International Conference on

作者： Fayçal Hadj Mihoub Sidi Moussa Abdelkader Morsli Abdelhalim Tlemçani Hocine Belmili Hassan Nouri Electrical Engineering and Automation Research Laboratory (LREA) University of Medea Medea Algeria Renewable Energy Development Center (CDER) Bou-Ismail Solar Equipment Development Unit (UDES) Tipaza Algeria Department of Engineering Design and Mathematics Power Systems Electronics and Control Research Group Bristol U.K.

This article presents a comparative study of two topologies of three-phase photovoltaic inverters connected to the grid, between the usual two-level inverter and three-level NPC (Neutral Point Clamped) inverter. Inverter control and the boost converter MPPT controller are based on the SRF-dq method and the INC algorithm respectively. The comparison relies on evaluating the overall efficiency and harmonic distortion of the inverter. All circuits are modeled and simulated using Matlab-Simulink. The results obtained indicate satisfaction with the quality, of the current and voltage injected into the electrical grid, and reflect that both inverters are efficient and comply with IEEE-519 standard recommendations, but the three-level inverter performs better results than the two-level inverter.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Hybrid Robust Sliding Mode and PI-controller for Stand-Alone Object’s Power Supply

Hybrid Robust Sliding Mode and PI-Controller for Stand-Alone...

引用

Annual Siberian Russian Workshop on Electron Devices and Materials (EDM)

作者： Danil Y. Lyapunov Alexandr L. Fedyanin Trong H. Pham Alexandra A. Pravikova Aleksandr A. Shilin Yuriy A. Kremzukov Division for Power and Electrical Engineering National Research Tomsk Polytechnic University Tomsk Russia Seversk Technological Institute - branch of State Autonomous Educational Institution of Higher Education National Research Nuclear National University MEPhi Seversk Russia Research Institute of Automation and Electromechanics Tomsk State University of Control Systems and Radioelectronics Tomsk Russia

ISBN: (数字)9798350389234

ISBN: (纸本)9798350353051

This paper delves into the problem of robust control of a power supply for a stand-alone remotely operated object, having power equipment onboard. Such objects are extensively used in oil and gas exploration, their production, offshore research and related problem areas. Power equipment generally involves both lighting and electric drives to provide remote operation of manipulators, thrusters and other electric components. Providing stable voltage, delivered to the object via long cables, represents an up-to-date problem for power supply developers. Research efforts, outlined in the present paper, suggest one of possible solution of this problem, namely, involving hybrid robust controller. This controller combines both sliding mode and conventional PI controllers in its structure. Such a solution provides not only stable voltage within the error band of $\pm \mathbf{1 \%}$ with respect to a rated value of $\mathbf{6 0 0} \mathrm{V}$ but also voltage surge mitigation when electric load changes stepwise. The voltage ripple ratio does not exceed $0.5 \%$. Matlab Simulink model of the power supply confirmes the a pplicability of the designed hybrid controler.

关键词： Robust control Power supplies Software packages Switches Hybrid power systems Steady-state Surges

来源：评论

学校读者我要写书评

暂无评论

Design of a Capsule Robot System for Gastric Hemorrhage Detection using Luminol 20

Design of a Capsule Robot System for Gastric Hemorrhage Dete...

引用

20th IEEE International Conference on Mechatronics and automation, ICMA 2023

作者： Mao, Yuchen Guo, Jian Guo, Shuxiang Fu, Qiang Tianjin University of Technology Tianjin Key Laboratory for Control Theory & Application Complicated Systems Intelligent Robot Laboratory School of Electrical Engineering and Automation Binshui Xidao Extension 391 Tianjin300384 China Shenzhen Institute of Advanced Biomedical Robot Co. Ltd No.12 Ganli Sixth Road Jihua Street Longgang District Shenzhen518100 China Key Laboratory of Convergence Medical Engineering System and Healthcare Technology The Ministry of Industry and Information Technology School of Life Science Beijing Institute of Technology No.5 Zhongguancun South Street Beijing100081 China

ISBN: (纸本)9798350320831

Gastric hemorrhage in upper gastrointestinal bleeding is an obvious indicator of deteriorating gastric disease. This paper proposes a capsule robot system for detecting bleeding in the stomach. The patient ingests a capsule robot containing luminol reagent, which detects bleeding in the stomach via chemiluminescence. The MCU receives the optical sensor signal, and the data is transmitted via radio frequency. The external lower computer receives and forwards the data to the upper computer for processing and display. The data is used to determine the presence and amount of stomach bleeding. Chemiluminescence is an excellent sensor, requiring no external energy supply, and demonstrating excellent sensitivity and selectivity. Combining chemical and electronic sensors presents opportunities for further development. Capsule robot detection reduces the discomfort and risk of secondary injury associated with traditional endoscopy. This paper establishes an experimental platform using porcine blood to simulate human blood, demonstrating the feasibility of the system. © 2023 IEEE.

关键词： Chemiluminescence

来源：评论

学校读者我要写书评

暂无评论

Line-of-sight based three-dimensional path following control for an underactuated robotic dolphin

引用

Science China(Information Sciences) 2021年第1期64卷 215-226页

作者： Jincun LIU Zhenna LIU Junzhi YU State Key Laboratory for Turbulence and Complex System Department of Mechanics and Engineering ScienceBIC-ESATCollege of EngineeringPeking University Department of Electrical and Automation Shandong Labor Vocational and Technical College State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of Sciences

This paper investigates the three-dimensional(3-D) path following control problem for an underactuated robotic dolphin. With a comprehensive consideration of the mechanical constraint and swimming principle of the robotic dolphin, a decoupling motion strategy is proposed to produce yaw and pitch maneuvers simultaneously. Then, kinematics and dynamics models for 3-D dolphin-like swimming are established,followed by simulations of the path following control. Furthermore, a novel lookahead based 3-D line-ofsight(LOS) guidance law is developed and implemented to obtain desired attitude angles with its simplicity,intuitiveness, and small computational footprint. Finally, simulation results illustrate the feasibility and effectiveness of the proposed path following control methods.

关键词： robotic dolphin path following 3-D LOS guidance law decoupling motion

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：