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3rd international conference on Environmental Pollution and Governance, ICEPG 2023

作者： Lin, Xiaohu Zhu, Liping Sun, Danyan Li, Shiyi Fang, Haifeng Zhou, Wenming Xu, Jingcheng PowerChina Huadong Engineering Corporation Limited Hangzhou311122 China Huadong Eco-Environmental Engineering Research Institute of Zhejiang Province Hangzhou311122 China College of Environmental Science and Engineering Tongji University Shanghai200092 China

ISBN: (纸本)9783031529009

Submerged plants play a vital role in improving water quality and controlling algal blooms in rivers, serving as the foundation for maintaining aquatic biodiversity. In this review, we explore the functions of submerged plants in water quality purification, allelopathic inhibition of algae, and the mechanisms involved. Further research should focus on the contributions of natural processes, the absorption of filamentous algae, and the effects of plant-associated biofilms on nutrient removal. This study aims to provide a comprehensive understanding of submerged plants’ potential for sustainable water quality management. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Water quality

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Dynamic Weighting Selection for Predictive Torque and Flux control of Industrial Drives 1

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3rd international conference on Data Science, Machine Learning and Applications, ICDSMLA 2021

作者： Muddineni, Vishnu Prasad Bonala, Anil Kumar Penthala, Thanuja Department of Electrical and Electronics Engineering Vaagdevi College of Engineering Telangana506005 India

ISBN: (数字)9789811959363

ISBN: (纸本)9789811959356

Finite Set-Model Predictive control (FS-MPC) based torque and flux control (popularly known as PTC) is one of the advanced control techniques used for the adjustable speed operation of industrial drives. This control technique offers fast dynamic response and retains the decoupled nature present in the conventional counterpart. One of the main challenges of this control approach is to select the suitable weighting factor (WF) for the respective objectives in cost function. In general, a heuristically selected WF is assigned to the flux objective in the cost function. The selected WF is constant irrespective of the drive operating conditions. In this paper, dynamically weighted objectives with modified cost function are introduced to overcome the above problem. To demonstrate the efficacy of proposed dynamic weighting approach, simulation results are illustrated for an induction motor (IM) drive with different operating conditions. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Induction motors

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Multi-time scale coordinated control strategy for frequency regulation of doubly-fed wind turbines 3

Multi-time scale coordinated control strategy for frequency ...

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2023 IEEE 3rd international conference on Data Science and Computer Application, ICDSCA 2023

作者： Zhu, Yihua Lu, Demao Yu, Jiawei Li, Chengxiang Jiang, Shouqi Electric Power Research Institute Co. Ltd China Southern Power Grid Guangzhou China Northeast Electric Power University School of Electric Power Engineering Jilin China

ISBN: (纸本)9798350341546

Aiming at the problems of system inertia reduction and frequency modulation capacity reduction caused by large-scale wind power replacing some traditional generators, a multi-time scale coordinated control strategy of doubly-fed wind turbines and traditional synchronous units jointly supporting the system frequency is proposed, so as to improve the system frequency stability and rationally utilize frequency modulation resources. According to the frequency modulation reserve capacity of traditional synchronous units and disturbance power, the system frequency modulation demand in different scenarios is analyzed, and the multi-time scale coordinated control strategy to actively support frequency of doubly-fed wind turbines is proposed. And based on the reserve capacity of traditional synchronous units, the frequency modulation dead zone value of doubly-fed wind turbines is designed, so that it can adaptively switch the inertia support and primary frequency regulation for different scenarios, and realize the full use of the frequency modulation reserve capacity of traditional synchronous units while giving full play to the rapid response ability of doubly-fed wind turbines. The frequency dynamic response characteristics of doubly-fed wind turbines with additional frequency active support control are analyzed, which further proves its superiority. Finally, the large-scale wind power grid-connected system simulation model is built based on RTLAB real-time digital simulation platform, which verifies the effectiveness of the control strategy in this paper. © 2023 IEEE.

关键词： coordinated control doubly-fed wind turbines frequency stability inertia support primary frequency regulation

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Modeling canopy temperature in closed greenhouses using coupled elliptic models 3

Modeling canopy temperature in closed greenhouses using coup...

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3rd Modeling, Estimation and control conference (MECC)

作者： Tawegoum, R. Inst Agro Rennes Angers Environm Phys & Hort EPHor Res Unit 2 rue Le Notre F-49045 Angers France

ISBN: (纸本)9781713872344

Microclimate within the canopy and at the plant surface can have a significant influence on the physiological processes of plants, as well as on the epidemiology of pathogens. Assessing greenhouse climate parameters, canopy microclimate and leaf surface microclimate is essential for developing greenhouse climate control strategies. Considering the canopy as a heterogenous porous medium and using the heat transfer theory, we developed a one-dimensional coupled elliptic system for control purposes to describe the air canopy and crop temperature, and established the existence and uniqueness of the solutions. The corresponding numerical model was derived within the finite difference framework. Simulations were conducted to evaluate the capability of the model to replicate canopy temperature for two arrangements of crops species under different behaviour and environment.

关键词： modeling and control of agriculture model formulation distributed parameter systems greenhouse heat transfer air quality planing

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Dynamic-Memory Event-Triggered control Approach and Its Application to Linear Systems

Dynamic-Memory Event-Triggered Control Approach and Its Appl...

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robotics, Automation and Intelligent control (ICRAIC), international conference on

作者： Jin Yang Xian Zhou Shihao Wang Qishui Zhong Kaibo Shi Lanfeng Hua School of Aeronautics and Astronautics University of Electronic Science and Technology of China Chengdu China School of Electronic Information and Electrical Engineering Chengdu University Chengdu China

The dynamic-memory event-triggered control problem for networked control systems is investigated in this paper. Firstly, a dynamic-memory event-triggered scheme (DMETS) is proposed to reduce the unnecessary data transmission. Then, a unified event-triggered control system model is established by applying the DMETS to linear system with time delay. Further, the asymptotic stability criteria are developed by constructing appropriate Lyapunov functional, and the design approach of controller is presented by using linear matrix inequality technology. Finally, the effectiveness of controller and the advantages of DMETS are verified by giving illustrative examples.

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Design and Implementation of Satellite control Unit Fault Simulation System Based on Virtual Simulation Technology 3

Design and Implementation of Satellite Control Unit Fault Si...

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3rd international conference on Machine Learning and Computer Application, ICMLCA 2022

作者： Wang, Haitao School of Information Science and Engineering Shenyang University of Technology Liaoning Province Hunnan District Nanping Middle Road 6# Shenyang China

ISBN: (纸本)9781510664814

The fault simulation of satellite control subsystem is an important part of the satellite fault simulation verification platform. It adopts the international standard modeling and simulation universal interface FMI, and through the full digital simulation mode, uses advanced simulation technology and virtual instrument technology to build a high fidelity user monitoring interface to achieve visual simulation flight, equipment fault simulation, user operation, information monitoring and other functions. The system level key failure modes of the satellite are simulated and verified in the development stage, and the ground recurrence and analysis of the failure phenomena are assisted in the satellite on orbit operation stage. It supports the satellite test and stable operation in orbit through satellite fault verification, satellite electrical performance test and other work. © 2023 SPIE.

关键词： Orbits

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Robust Coordinated Compliant control for Dual-Arm Robots with Position Uncertainty of End-Effector 1

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3rd international conference on Autonomous Unmanned Systems, ICAUS 2023

作者： Zhao, Jiangbo Chen, Chengyuan Wang, Junzheng Yan, Tong Zhao, Jianxin Jiang, Yunfeng School of Automation Beijing Institute of Technology Beijing100081 China Collective Intelligence and Collaboration Laboratory Beijing China

ISBN: (数字)9789819710997

ISBN: (纸本)9789819710980

In this paper, a robust coordinated compliance control is addressed to realize position/force tracking for dual-arm cooperative robots. The control strategy combines sliding mode control with impedance control to complete dual-arm coordinated tasks with external disturbance and position uncertainty of end-effector. The trajectory errors from measure disturbance is considered, and SMC is used to eliminate it. When the system is subjected to external disturbance, the force of end-effector is decomposed into external force and internal force by force decomposition model. Then the impedance control is introduced and the system achieve compliance control by adjusting the reference trajectory to prevent too large internal force between two arms. Finally, a simulation experiment is designed to verify the effectiveness of proposed strategy. The results illustrate the excellent performance and feasibility of our proposed method. © Beijing HIWING Scientific and Technological Information Institute 2024.

关键词： Sliding mode control

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Approximate Gaussian kernel mapping incremental LSSVR based on knowledge transfer and its industrial application

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ENERGY REPORTS 2023年 9卷 627-637页

作者： Liu, Ying Liu, Deyan Lv, Zheng Zhao, Jun Dalian Univ Technol Key Lab Intelligent Control & Optimizat Ind Equipm Minist Educ Dalian 116024 Peoples R China

Aiming at the problem of diversified and time-varying data in industrial energy forecast, an incremental least squares support vector regression model based on approximate Gaussian kernel mapping and knowledge transfer is proposed. Firstly, an incremental learning method based on historical parameter transfer is designed, which is applied to single output and multiple output least squares support vector regression models respectively. It can update the prediction model quickly and meet the requirements of real-time. In order to further improve the prediction accuracy, the approximate Gaussian kernel mapping based on Taylor series theory is used to extend the proposed model to the nonlinear case, which effectively solves the problem of kernel matrix storage. At the same time, the training process is optimized through Sherman-Morrison-Woodbury (SMW) formula, which improves the solution efficiency in enhancing the flexibility of the model. Experiments on industrial energy data show that the proposed method can improve the adaptive ability and prediction accuracy of the model, and improve energy efficiency. (c) 2023 Published by Elsevier Ltd. This is an open access article under the CCBY-NC-ND license

关键词： Incremental learning Approximate Gaussian kernel mapping Least squares support vector regression Energy forecast

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Real-World Experiments on Acoustic Detection of Small UAVs 3rd

Real-World Experiments on Acoustic Detection of Small UAVs

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3rd international conference on Autonomous Unmanned Systems, ICAUS 2023

作者： Xu, Mengdie Wang, Xiaofeng Yao, Chenxi Yang, Chaoqun School of Automation Southeast University Nanjing China State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou China Nanjing Research Institute of Electronics Technology Nanjing China Houzz Company Palo Alto United States

ISBN: (纸本)9789819710904

This paper presents the real-world experiments on the acoustic detection of small unmanned aerial vehicles (UAVs). To achieve the accurate detection of the small UAVs, a series of data processing steps including harmonics extraction, feature extraction, and support vector machine are carried out. After that, experimental results demonstrate that the small UAVs such as DJI Phantom 4 pro can be detected accurately by using acoustic sensors. © Beijing HIWING Scientific and Technological Information Institute 2024.

关键词： Support vector machines

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Adaptive control of Path Tracking Based on Improved Pure Pursuit Algorithm 1

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3rd international conference on Autonomous Unmanned Systems, ICAUS 2023

作者： Chi, Cheng Xu, Xiaosu Zhou, Shuai Wang, Yaqi School of Instrument Science and Engineering Southeast University Nanjing China The Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology Ministry of Education Nanjing China

ISBN: (数字)9789819710997

ISBN: (纸本)9789819710980

Path tracking accuracy is crucial in the navigation control of autonomous mobile robots. Traditional pure pursuit algorithms perform well on smooth paths but struggle on curved paths. To address the challenge of tracking tight curves on curved paths, an improved pure pursuit algorithm is proposed. It adaptively adjusts the preview distance based on the path curvature and determines the robot’s speed adaptively based on the turning radius. Additionally, the change rate of curvature is incorporated as a heuristic factor to adjust the preview distance and movement speed. The proposed algorithm is tested by using four typical paths. What’s more, it is also integrated into the autonomous navigation system to track the planned paths. Finally, prototype experiments demonstrate that compared to traditional algorithms, the proposed algorithm achieves higher accuracy and can handle more challenging paths. © Beijing HIWING Scientific and Technological Information Institute 2024.

关键词： Navigation systems

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