检索结果-内蒙古大学图书馆

IEEE Conference on Decision and control

作者： Ze Yang Baoqing Yang Ruihang Ji Jie Ma Department of Control Science and Engineering Harbin Institute of Technology Harbin China Department of Electrical and Computer Engineering National University of Singapore Singapore

In this paper, an active fault tolerant control method for spacecraft against actuator faults, uncertainties and disturbances is investigated. First, an adaptive iterative learning observer with improved adaptive law is proposed, which greatly improves the accuracy and speed of fault estimation. Then, a novel adaptive finite time prescribed performance fault tolerant controller is proposed, which has flexible performance constraints according to faults and control references, with better robustness and lower conservatism, breaking the limitation of fixed performance constraint. Next, an online optimal control allocation strategy is designed to achieve high-performance actuator allocation under saturation and fault constraints. Finally, through numerical simulation, the effectiveness and robustness of the proposed scheme are illustrated by comparing with existing methods.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A Review of Economic and Environmental Impacts of Potential Renewable Energy Resources in Certain Climate Regions

SSRN

引用

SSRN 2024年

作者： Guanghua, Lyu Shaikh, Shoaib Hussain Shah, Syed Hadi AlKassem, Abdulrahman Soomar, Arsalan Muhammad Khan, Sohrab Power China Huadong Engineering Corporation Limited China Mehran University of Engineering and Technology Sindh Pakistan Department of Electrical Engineering Faculty of Engineering Islamic University of Madinah Saudi Arabia Faculty of Electrical and Control Engineering Gdańsk University of Technology Gdansk Poland Department of Electrical and Computer Engineering Mohammad Ali Jinnah University Pakistan

This paper presents a review on potential renewable energy sources (RESs) for climate regions of two Asian countries i.e. China and Pakistan, and two middle east countries i.e, United Arab Emirates (UAE) and Saudi Arabia (KSA). The environmental conditions as well as economic impacts of RESs in these countries have been discussed thoroughly. Detailed statistics related to availability, demand, trends and consumption of cleaner and abundant RESs like hydro, solar and wind in these countries have been presented. Moreover, a comprehensive discussion on initiatives taken by various industries in the studied countries to incorporate RESs using the latest data and analytical visualizations is presented. Finally, a concise overview of mechanisms adopted in studied as well as developed countries through multiple case studies are presented in order to encourage the adoption of renewable energy sources in under developed regions. The presented propositions are verified for consistency via a thorough evaluation of the literature and analysis of available statistical data. The outcomes of the paper are of great significance for understanding the RESs potential, their energy consumption status, trends and for planning and adopting mechanism for power generation using RES in selected countries. © 2024, The Authors. All rights reserved.

关键词： Environmental impact

来源：评论

学校读者我要写书评

暂无评论

Robust control of Feeding Speed in Coal Seam Drilling Process Considering Borehole Friction

Robust Control of Feeding Speed in Coal Seam Drilling Proces...

引用

2024 China Automation Congress, CAC 2024

作者： Liu, Xiao Chen, Luefeng Lu, Chengda Fan, Haipeng Wu, Min Pedrycz, Witold School of Automation The Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems The Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education China University of Geosciences Wuhan430074 China Department of Electrical and Computer Engineering University of Alberta EdmontonABT6G 2R3 Canada Systems Research Institute Polish Academy of Sciences Warsaw00-901 Poland Department of Computer Engineering Istinye University Sariyer Istanbul34396 Turkey

ISBN: (纸本)9798350368604

During the coal seam drilling process, the drill string is subject to compressive deformation, compounded by unpredictable variations in formation hardness and borehole wall friction, leading to challenges in maintaining a stable feeding speed. This paper presents a novel approach by introducing uncertain parameters to describe the effects of formation hardness and borehole wall friction. Drill string axial movement model is modeled as a polyhedral system based on a lumped parameter representation. To meet industrial performance requirements, we design a robust H∞ controller to achieve consistent feeding speed control. Our simulation results demonstrate the controller’s effectiveness in ensuring system stability despite fluctuations in formation hardness and drill string friction. © 2024 IEEE.

关键词： Coal deposits

来源：评论

学校读者我要写书评

暂无评论

A Comparative Evaluation of GA and PSO Tuned PID controllers for the Quadruple Tank System

A Comparative Evaluation of GA and PSO Tuned PID Controllers...

引用

Information and Communication technology for Development for Africa (ICT4DA), International Conference on

作者： Gashaye L. Hailu Tefera T. Yetayew Electrical and Computer Engineering Faculty Bahir Dar Institute of Technology Bahir Dar University Bahir Dar Ethiopia Department of Power and Control Engineering Adama Science and Technology University Adama Ethiopia

ISBN: (数字)9798331527792

ISBN: (纸本)9798331527808

In this research, nature inspired metaheuristic optimization algorithms: Genetic Algorithm (GA) and Particle Swarm Optimization (PSO) Techniques are formulated to tune optimal combinations of PID controller parameters for a quadruple tank level control application. The degree of relation of the best paring for both interacted control loops are justified by using Relative Gain Array (RGA) calculation. The overall system has been modeled and implemented in MATLAB/Simulink and performance evaluations has been done for time domain performance specifications of settling time, rise time, percentage overshoot and steady state error as comparison criterions of controllers. Accordingly, for the minimum phase case, GA tuned PID has settling time of 0.36sec and 0.31second for the tank 1 and tank 2 respectively. And PSO tuned PID controller has settling time of 0.96sec and 0.35sec for tank 1and tank 2 respectively. The quantitative and qualitative analysis of results reveals that there is fast dynamic response using GA PID relative to PSO PID even though the difference is not significant that may be due to stochastic feature of the metahueristic optimization algorithms. In summary, the optimal combination of PID controller algorithms’ parameters can give robust performance compared to PID controller designed using the classical approaches or manual tuning techniques.

关键词： Performance evaluation Heuristic algorithms Metaheuristics Stochastic processes Mathematical models Steady-state Time-domain analysis MATLAB Tuning Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

Reinforcement Learning-Based Fault-Tolerant control of Uncertain Strict-Feedback Nonlinear Systems With Intermittent Actuator Faults

引用

IEEE Transactions on Neural Networks and Learning Systems 2025年第6期36卷 10464-10478页

作者： Qinmin Yang Huaying Li Zhengwei Ruan Bo Fan Shuzhi Sam Ge State Key Laboratory of Industrial Control Technology College of Control Science and Engineering Zhejiang University Hangzhou China Hangzhou Huawei Communication Technology Company Ltd. Hangzhou China School of Automation Science and Engineering Xi’an Jiaotong University Xi’an China Department of Electrical and Computer Engineering Institute for Functional Intelligent Materials National University of Singapore Queenstown Singapore

In this work, a novel reinforcement learning-based adaptive fault-tolerant control (FTC) scheme with actuator redundancy is presented for a nonlinear strict-feedback system with nonlinear dynamics and uncertainties. A learning-based switching function technique is established to steer different groups of actuators automatically and successively to mitigate the impact of faulty actuators by observing a switching performance index. The optimal tracking control problem (OTCP) of strict-feedback nonlinear systems is transformed into an equivalent optimal regulation problem of each affine subsystem via adaptive feedforward controllers. Subsequently, the designed objective functions associated with Hamilton–Jacobi–Bellman (HJB) estimate errors caused by neural network (NN) approximations can be minimized by the reinforcement learning algorithm without value or policy iterations. It is proved that the tracking objective can be achieved and all signals in the closed-loop system can be guaranteed to be bounded, as long as the minimum time interval between two successive failures is bounded. Theoretical results are verified by simulations.

关键词： Actuators Switches Fault tolerant systems control systems Optimal control Redundancy Nonlinear dynamical systems Adaptive control Regulation Industrial control

来源：评论

学校读者我要写书评

暂无评论

Adaptive control of Spur Gear Systems via Proximal Policy Optimization and Attention-Based Learning

Adaptive Control of Spur Gear Systems via Proximal Policy Op...

引用

International Conference on control, Instrumentation, and Automation

作者： Mohammad Ali Labbaf Khaniki Marzieh Mirzaeibonehkhater Amirhossein Samii Mohammad Manthouri Department of Control Engineering K.N. Toosi University of Technology Tehran Iran Department of Electrical and Computer Engineering Indiana University-Purdue University Department of Electrical and Computer Engineering Technical University of Crete Crete Greece Department of Electrical and Electronic Engineering Shahed University Tehran Iran

This study presents a novel approach for the adaptive control of chaotic spur gear systems using Proximal Policy Optimization (PPO) and attention-based learning. The spur gear system is known for its chaotic behavior, posing challenges for conventional control methods. In this research, the on-policy deep reinforcement learning algorithm, PPO, is employed to effectively control the chaotic dynamics of the spur gear system. PPO is a good choice for controlling chaotic systems because it can learn from the current policy, which is important in situations where the dynamics of the system can change quickly. Furthermore, the neural network architecture within the PPO framework is enhanced by incorporating a self-Attention mechanism. The attention mechanism can adaptively adjust its attention weights based on the current state and policy, allowing the network to dynamically allocate its resources to the most critical aspects of the system. The proposed adaptive control approach demonstrates promising results in effectively managing the chaotic spur gear System, offering potential applications in various real-world scenarios where such systems are encountered.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Impact of Parameters for the In-situ Measurement of the Electric Field Strength of the SSB Signal in a 5G NR System Using the Frequency-Selective Method in Zero-Span Mode

Impact of Parameters for the In-situ Measurement of the Elec...

引用

International Conference on Smart Systems and Technologies (SST)

作者： Vanja Mandrić Slavko Rupčić Bogdan Pavković Josip Ilakovac Department of Communication Faculty of Electrical Engineering Computer Science and Information Technology Osijek Osijek Croatia Department of Computing and Control Engineering Faculty of Technical Sciences University of Novi Sad Novi Sad Serbia Faculty of Electrical Engineering Computer Science and Information Technology Osijek Osijek Croatia

ISBN: (数字)9798350386394

ISBN: (纸本)9798350386400

Measuring 5G systems is a major challenge for measurement engineers, who need to be aware of all the limitations of the new generation The parameters of the frequency-selective measurement system (spectrum analyzer - ROHDE & SCHWARZ FSH8) were investigated in the measurement of 5G NR SSB signals (3.4 – 3.8 GHz). The focus was on the setting parameters which, according to the literature, have an influence on the measurement: RBW, VBW, SWEEP TIME and the duration of the measurement. All measurements were carried out in zero-span mode. In the second part of the measurement, these SSB synchronization signal measurement results were compared with the 5G signal measurement results at the same location using the NARDA SRM-3006 device equipped with a decoder for the 5G NR system (FR1) to determine the optimal method for measuring these signals with a spectrum analyzer (SA).The measurement results show that the resolution bandwidth (RBW) has the largest variation in the measured electric field (EF) strength values of the SSB 5G NR signal of 17.20 dB (MH/RMS) and 17.70 (RMS/AGV10). It is therefore necessary to pay particular attention to the setting of this measurement parameter. In addition, the video resolution (VBW) shows a significantly lower field strength variation of 2.50 dB, but also the same deviation from the reference value of 2.50 dB (RMS/AGV10). Other analyzed parameters have a negligible influence on the measurement of the EF *** post-processing was performed in the work to determine the final (maximum) value of the EF strength at the points of assumed highest exposure, which is used to assess the impact and compliance with the permissible values according to the relevant standards.

关键词： Time-frequency analysis 5G mobile communication Measurement uncertainty Electric variables measurement Amplitude modulation Time measurement Frequency measurement Decoding Electric fields Signal resolution

来源：评论

学校读者我要写书评

暂无评论

Investigation of Mode Transformation in Motor control System of Unmanned Aerial Vehicle Exposed to Intentional Electromagnetic Interference

Investigation of Mode Transformation in Motor Control System...

引用

Asia-Pacific Symposium on Electromagnetic Compatibility (APEMC)

作者： Huamin Jie Zhenyu Zhao Yongqi Chang Fei Fan Changdong Wang Kye Yak See School of Electrical and Electronic Engineering Nanyang Technological University Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore Department of Control Science and Engineering Harbin Institute of Technology Harbin China School of Electronics and Information Engineering Harbin Institute of Technology Harbin China

ISBN: (数字)9784885523472

ISBN: (纸本)9798350349498

Susceptibility acts as a critical metric for assessing an electrical apparatus’s performance and reliability amidst the external electromagnetic environment, especially the intentional electromagnetic interference (IEMI). Given that the IEMI often invades electrical systems in common-mode (CM) and converts to the differential-mode (DM) signal to disrupt the normal operation of devices, investigating the mode transformation in the system under attack is pivotal for its susceptibility analysis. This paper first investigates the CM to DM conversion in the motor control system of the unmanned aerial vehicle (UAV) illuminated by an external IEMI. Experimental studies explore the influence of the distance between UAV and copper ground on mode conversion, revealing that adjusting the UAV’s landing gear height have the potential to enhance its susceptibility.

关键词： Performance evaluation Motor drives Electric potential Gears Electromagnetic interference RF signals Immunity testing

来源：评论

学校读者我要写书评

暂无评论

Worst-Scenario Prediction for Field-to-Cable Coupling Under Continuous Intentional Electromagnetic Interference Attack

Worst-Scenario Prediction for Field-to-Cable Coupling Under ...

引用

Asia-Pacific Symposium on Electromagnetic Compatibility (APEMC)

作者： Huamin Jie Eng Kee Chua Zhenyu Zhao Yongqi Chang Changdong Wang Kye Yak See School of Electrical and Electronic Engineering Nanyang Technological University Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore Department of Control Science and Engineering Harbin Institute of Technology Harbin China School of Electronics and Information Engineering Harbin Institute of Technology Harbin China

ISBN: (数字)9784885523472

ISBN: (纸本)9798350349498

Studying intentional electromagnetic interference (IEMI) is crucial for safeguarding hardware safety, as it helps to address the deliberate disruption of electronic devices. The field-to-cable coupling serves as a prevalent attack mechanism of IEMI, precipitating unexpected failures of the device under test. Many efforts focus on the analysis of field-to-cable coupling under high-power electromagnetic pulse, but less target on the phenomenon illuminated with continuous waves. This paper proposes a novel method to predict the worst-case for field-tocable coupling under continuous IEMI attack. By employing the transmission line theory to characterize the cables and obtaining the impedance information of the devices at both ends of the cable, an analytical model is built for determining the terminal voltage frequency responses induced by IEMI. Subsequently, the sensitive frequency region of this cable-connected electrical system can be determined, facilitating purposive immunity improvements. Using an unmanned aerial vehicle (UAV) as an example, the analytical calculations are compared with the radiated susceptibility test. The results exhibit a good agreement with experiments and validate the effectiveness of the proposed method.

关键词： Couplings Analytical models Systematics Electromagnetic interference Voltage Immunity testing Autonomous aerial vehicles

来源：评论

学校读者我要写书评

暂无评论

Prototype of Turbine Propulsion System with controllable Thrust Vector for Long-Range Unmanned VTOL Aircraft 21st

Prototype of Turbine Propulsion System with Controllable Thr...

引用

21st Polish control Conference, PCC 2023

作者： Czyba, Roman Lemanowicz, Marcin Domin, Jaroslaw Grzybowski, Jacek Stępień, Izabela Ungier, Lukasz Rosiek, Radoslaw Bialas, Piotr Niemiec, Michal Department of Automatic Control and Robotics Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology ul. Akademicka 16 Gliwice44-100 Poland Department of Chemical Engineering and Process Design Faculty of Chemistry Silesian University of Technology ul. Ks. M. Strzody 7 Gliwice44-100 Poland Department of Mechatronics Faculty of Electrical Engineering Silesian University of Technology ul. Akademicka 10a Gliwice44-100 Poland

ISBN: (纸本)9783031351723

The aim of the project was to build a prototype of a turbine drive with a controllable thrust vector for a long-range vertical take-off and landing (VTOL) aircraft. The construction of the prototype required the development of a vectoring system for the tail propulsion system and a dedicated VTOL aircraft stabilization and control system. The prototype of the turbine drive system was based on energy-efficient electric motors. Research also involved modeling the turbine propulsion aerodynamics with usage of computational fluid dynamics (CFD) analysis. As a result of the design stage, a prototype of the propulsion system was created, on which flight tests were carried out. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Computational fluid dynamics

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：