检索结果-内蒙古大学图书馆

Dynamics characteristics analysis of rigid-flexible model under electromechanical coupling effect

Zhendong yu Chongji/Journal of Vibration and Shock 2025年第12期44卷 10-18页

作者： Lai, Wangjie Cai, Chensheng Huang, Changyang Gao, Haiming Zhang, Shunqi School of Mcchatronic Engineering and Automation Shanghai University Shanghai200444 China Shanghai Institute of Spaceflight Control Technology Shanghai201109 China

Aiming at the problem of flexible vibration of rigid-flexible coupled model in the process of motion, the dynamic modeling and analysis of rigid-flexible model considering the influence of electromechanical coupling were studied. Based on Lagrange' s principle, the ordinary differential equations of motion of the rigid-flexible model and the partial differential equations of the flexible parts were derived to realize the coupling dynamics calculation between the flexible parts and the rigid body. On this basis, the piezoelectric principal structure was introduced to establish the rigid-flexible coupled continuous dynamics equations considering the effect of electromechanical coupling, and the assumed mode method was used to discretize the continuous dynamics equations to establish the system characteristic equations. The accuracy and reliability of the derived model were verified by means of ANSYS individual simulation and ANSYS-ADAMS joint simulation, respectively. Finally, based on the system dynamics model of the truncated mode, the dynamics response of the piezoelectric structure was calculated using PID (proportional-integral-derivative) control, and it was verified that the voltage control based on the piezoelectric intrinsic structure has an obvious suppression effect on the vibration of the high-precision rigid-flexible model. © 2025 Chinese Vibration engineering Society. All rights reserved.

关键词： Flexible couplings

来源：评论

学校读者我要写书评

暂无评论

Dispatch of a Coal Mine-Integrated Energy System:Optimization Model with Interval Variables and Lower Carbon Emission

引用

Tsinghua Science and Technology 2024年第5期29卷 1441-1462页

作者： Hejuan Hu Xiaoyan Sun Bo Zeng Dunwei Gong Yong Zhang Patrick Nyonganyi Henerica Tazvinga School of Information and Control Engineering ChinaUniversity of Mining and TechnologyXuzhou 221116China Laboratory of Alternate Electrical PowerSystem with Renewable Energy Sources North ChinaElectric Power UniversityBeijing 102206China School of Information Science andTechnology Qingdao University of Science and TechnologyQingdao 266061China Department of Automation Tsinghua UniversityBeijing 100084China South Africa WeatherService Pertoria 0001South Africa

In the coal mining process,a large amount of Coal Mine-Associated energy(CMAE),such as coal mine methane and underground wastewater,is *** on the modeling and optimization dispatching of a Coal Mine-Integrated Energy System(CMIES)with CMAE effectively saves energy and reduces carbon *** has great uncertainties owing to the affections of the hydrogeology conditions and mining *** addition,thermal loads have high comfort requirements in mines,which brings great challenges to the optimization dispatching of ***,this paper studies the architecture and solution of CMIESs with a flexible thermal load and source-load ***,to effectively improve the electric and thermal conversion efficiency,the architecture of CMIES,including a concentrating solar power station,is ***,for the scheduling model with bilateral uncertainty,the interval representation method with interval variables is proposed,and a multi-objective scheduling model based on the interval variables and flexible thermal load is ***,we propose a solution method for the model with interval variables.A case study is conducted to demonstrate the performance of our model and method for lowering carbon emissions and cost.

关键词： Integrated Energy Systems(IESs) Coal Mine-Integrated Energy Systems(CMIES) bilateral uncertainties concentrating solar power station interval optimization

来源：评论

学校读者我要写书评

暂无评论

Simulation Analysis of Ferromagnetic Resonance of 10kV Electromagnetic Voltage Transformer 6

Simulation Analysis of Ferromagnetic Resonance of 10kV Elect...

引用

6th International Conference on Power and Energy Applications, ICPEA 2023

作者： Cai, Ning Dai, Dongyun You, Yimin Lin, Zhangzheng Wang, Xu Tu, Yuanting Xiamen University of Technology Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control School of Electrical Engineering and Automation Xiamen China

ISBN: (纸本)9798350359053

Electromagnetic voltage transformers are usually used as measurement and protection devices in distribution networks with voltage levels of 10kV. The ferromagnetic resonance caused by the nonlinear characteristics of the excitation inductance of the electromagnetic voltage transformer is a common power system accident in the current power grid. Based on the Maxwell 3D module of ANSOFT software, this paper takes the JDZ10-10C1 voltage transformer as the reference model for modeling and simulation. The simulation results show the magnetic flux change of the voltage transformer core and the waveforms of overvoltage and inrush current when ferromagnetic resonance occurs. The amplitude-frequency characteristics of the excitation current are analyzed by Fourier transform. The simulation process further simulates the inductance change of voltage transformer under different voltage levels, which provides a reference for the selection of voltage transformer in engineering practice and has certain reference significance. © 2023 IEEE.

关键词： Electromagnetic simulation

来源：评论

学校读者我要写书评

暂无评论

Optimal Secure control for Cyber Physical Systems Against Joint Sensor and Actuator Attacks 6

Optimal Secure Control for Cyber Physical Systems Against Jo...

引用

6th International Conference on Electronic engineering and Informatics, EEI 2024

作者： Li, Xiao-Meng Li, Jinyan Cheng, Zhijian School of Mechanical and Electrical Engineering Guangzhou University Guangzhou510006 China School of Automation Guangdong University of Technology Guangdong Hong Kong Joint Laboratory for Intelligent Decision and Cooperative Control Guangzhou510006 China

ISBN: (纸本)9798350353594

This paper aims to investigate the security control problem of CPSs subject to joint sensor and actuator attacks. Different from most existing results, a more realistic situation for the CPSs is proposed by considering joint sensor and actuator attacks, process noise, and measurement noise. To identify joint attacks on sensor and actuator, an effective detector is developed. Based on the detection results, the optimal secure control strategy is designed. Compared with the tradition control method, this paper designed control scheme can ensure that the CPSs achieve optimal performance when the sensor unit and actuator unit are attacked simultaneously. The efficacy of the developed optimal secure control strategy is testified through a simulation example. © 2024 IEEE.

关键词： Cyber attacks

来源：评论

学校读者我要写书评

暂无评论

Impact Time Cooperative Guidance for Multi-Missile System Based on Incremental Learning 42

Impact Time Cooperative Guidance for Multi-Missile System Ba...

引用

42nd Chinese control Conference, CCC 2023

作者： Li, Xuheng Yu, Jianglong Dong, Xiwang Ren, Zhang Feng, Zhuo Liang, Biao School of Automation Science and Electrical Engineering Beihang University Science and Technology on Aircraft Control Laboratory Beijing100190 China Beijing Institute of Control and Electronic Technology Beijing100038 China

ISBN: (纸本)9789887581543

An impact time cooperative guidance method based on incremental learning is proposed for multi-missile cooperative guidance problem in the attack scenario. Firstly, a guidance model is established to represent the relationship of the missiles and the target. Secondly, an impact time coordinated guidance law based on the consensus method is designed. Then, time-to-go of the missile is predicted using an incremental learning algorithm, so that the accuracy of time-to-go can be better than the results calculated by traditional methods. Finally, the trained neural network is used to predict time-to-go. The results show that the algorithm can be used in the cooperative guidance law to complete the coordination in time, which is superior to the traditional guidance rate in coordination and has advantage in the scene of large maneuvering target. © 2023 Technical Committee on control Theory, Chinese Association of automation.

关键词： Learning algorithms

来源：评论

学校读者我要写书评

暂无评论

Reward Drops in Learning-based control with an Experimental Validation on Microdrones 63

Reward Drops in Learning-based Control with an Experimental ...

引用

63rd IEEE Conference on Decision and control, CDC 2024

作者： Tukenmez, Nejat Fotiadis, Filippos Junior, Jose M. Magalhaes Vamvoudakis, Kyriakos G. Bogosyan, Seta O. Istanbul Technical University Mechatronics Engineering Department Istanbul34469 Turkey Georgia Institute of Technology School of Aerospace Engineering AtlantaGA United States Istanbul Technical University Control and Automation Engineering Department Istanbul34469 Turkey

ISBN: (纸本)9798350316339

In this paper, we consider a computationally efficient learning-based control mechanism dealing with dense reward processing for a zero-sum game. The problem has been formulated as the online learning of the Nash equilibrium without requiring any information on the system dynamics. It has firstly been constructed as an infinite horizon optimal control problem, then as an online model-free Q-learning framework, which is composed of critic and actor networks (i.e., for the control and disturbance input). The closed-loop system is also proved to have a stable equilibrium point even in the presence of reward drops. The efficacy of the learning-based controller has been validated through simulations and experiments on micro drones. © 2024 IEEE.

关键词： Contrastive Learning

来源：评论

学校读者我要写书评

暂无评论

Design and Application of Electric Life Test System for DC Contactor 5

Design and Application of Electric Life Test System for DC C...

引用

5th IEEE International Conference on Power, Intelligent Computing and Systems, ICPICS 2023

作者： You, Yimin Zhou, Shunxiong Dai, Dongyun Yuan, Huisheng Qiao, Rui Jiang, Weiyun School of Electrical Engineering and Automation Xiamen University of Technology Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control Xiamen China

ISBN: (纸本)9798350333442

In recent years, the new energy industry has ushered in a golden period of rapid development, and DC switches have been widely concerned. In view of the problems such as no zero crossing of DC switch and difficulty in extinguishing DC arc, the research objective of this paper is to build a DC contactor electrical life test system to assist the research and test verification of DC breaking performance of low-voltage appliances, and to cover DC contactors of different models and specifications (250V-1500VDC, 10-600A) in the market. Firstly, the principle of LC discharge is analyzed, and the voltage and current generated by the non-oscillating discharge process is used to provide the breaking conditions for DC contactor. Then, the design of the main circuit, the establishment of the simulation model, the determination of parameters, the test verification and the optimization of the circuit are introduced. The results of numerical simulation and experimental measurement show that the test system can support the electric life prediction of DC switches such as DC contactor and DC circuit breaker, the most difficult to break current and arc test research. © 2023 IEEE.

关键词： Electric circuit breakers

来源：评论

学校读者我要写书评

暂无评论

Cooperative Advantage Actor-Critic Reinforcement Learning for Multiagent Pursuit-Evasion Games on Communication Graphs

IEEE Transactions on Artificial Intelligence

引用

IEEE Transactions on Artificial Intelligence 2024年第12期5卷 6509-6523页

作者： Meng, Yizhen Liu, Chun Wang, Qiang Tan, Longyu Shanghai Aerospace Control Technology Institute Shanghai201109 China Shanghai Key Laboratory of Aerospace Intelligent Control Technology Shanghai201109 China Shanghai University School of Mechatronic Engineering and Automation Shanghai200444 China Shanghai University Institute of Artificial Intelligence Shanghai200444 China Northwestern Polytechnical University College of Astronautics Xi'an710072 China

This article investigates the distributed optimal strategy problem in multiagent pursuit-evasion (MPE) games, striving for Nash equilibrium through the optimization of individual benefit matrices based on observations. To this end, a novel collaborative control scheme for MPE games using communication graphs is proposed. This scheme employs cooperative advantage actor-critic (A2C) reinforcement learning to facilitate collaborative capture by pursuers in a distributed manner while maintaining bounded system signals. The strategy orchestrates the actions of pursuers through adaptive neural network learning, ensuring proximity-based collaboration for effective captures. Meanwhile, evaders aim to evade collectively by converging toward each other. Through extensive simulations involving five pursuers and two evaders, the efficacy of the proposed approach is demonstrated, and pursuers seamlessly organize into pursuit units and capture evaders, validating the collaborative capture objective. This article represents a promising step toward effective and cooperative control strategies in MPE game scenarios. © 2024 IEEE.

关键词： Reinforcement learning

来源：评论

学校读者我要写书评

暂无评论

Review of Operation and control of the New Energy Storage Isolated Network Systems 4th

Review of Operation and Control of the New Energy Storage Is...

引用

4th International Symposium on Insulation and Discharge Computation for Power Equipment, IDCOMPU 2023

作者： He, Xianqiang Zhao, Weixing Cao, Fei Ma, QinFeng Liu, Mingshun Qin, Hai Pu, Qingxin Sun, Yudong Guizhou Power Grid Co. Ltd. Electric Dispatching and Control Center Guiyang550000 China Beijing Sifang Protection and Automation Engineering Technology Co. Ltd Beijing100044 China School of Electrical Engineering and Automation Wuhan University Wuhan430000 China

ISBN: (纸本)9789819973927

With the rapid development of distributed power generation technology and microgrid technology, research on the operation and control of new energy storage isolated network systems has received widespread attention. Compared with grid-connected operation, isolated operation can improve the acceptance and application of new energy, increase the flexibility of power grid operation, and solve the problem of difficulty in long-distance transmission in remote areas, which is an important application form and development trend of future new energy. This article reviews the latest progress in the operation and control of new energy storage isolated network systems. The key technologies for the operation and control are analyzed, general methods for the operation and control strategy of are given, and future technology development trends are predicted and discussed. © 2024, Beijing Paike Culture Commu. Co., Ltd.

关键词： Relay protection

来源：评论

学校读者我要写书评

暂无评论

Identification and Prediction of Microvascular Invasion in Hepatocellular Carcinoma Based on Multiple Sequence Fusion Images 43

Identification and Prediction of Microvascular Invasion in H...

引用

43rd Chinese control Conference, CCC 2024

作者： Lu, Mingguang Zhu, Yuan China University of Geosciences School of Automation Wuhan430074 China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan430074 China Engineering Research Center of Intelligent Technology for Geo-Exploration Wuhan430074 China

ISBN: (纸本)9789887581581

Hepatocellular carcinoma (HCC) is one of the most difficult diseases to be treated fundamentally in the medical field in today's world, and the recurrence rate of HCC has been increasing year by year in recent years. The study on the identification and prediction of microvascular invasion phenomenon (MVI) in hepatocellular carcinoma is beneficial to the postoperative prevention of hepatocellular carcinoma patients, which can greatly improve the survival probability of patients after surgery. In this study, a new MVI prediction method (MSF-GWO-GPR) was proposed, which combines the multi-sequence image features of imaging histology, sifts out the unimportant features through the T-test method and the dimensionality reduction of Lasso regression, and establishes the multi-sequence Gaussian process regression (GPR) prediction model for data fusion, and combined with the Gray Wolf Optimization (GWO) algorithm to design a suitable optimization objective function to optimize the hyper-parameters in the GPR, in order to get better prediction results. Compared with the existing methods, the data from different sequences of MRI images are selected for fusion in this study, which makes the feature data richer and more complete, and the model applicability is better;moreover, by optimizing the hyperparameters in the model through the GWO, the model can be made more accurate, reduce the risk of misidentified prediction, and improve the accuracy rate. The experimental results show that MSF-GWO-GPR outperforms widely used machine learning methods in terms of accuracy, F1 score, precision, recall and AUC metrics. This may provide a new idea for the identification and prediction of MVI in hepatocellular carcinoma. © 2024 Technical Committee on control Theory, Chinese Association of automation.

关键词： Dimensionality reduction

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：