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检索条件"任意字段=3rd International Conference on Robotics and Control Engineering, RobCE 2023"

共 3900 条记录，以下是1631-1640 订阅

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Collaborative Model Predictive control for High-Frequency Hybrid Power Amplifiers with High Efficiency and Low THD

Collaborative Model Predictive Control for High-Frequency Hy...

引用

2023 IEEE international conference on Predictive control of Electrical Drives and Power Electronics, PRECEDE 2023

作者： Tang, Cheng Li, Yuze Jia, Yingzhe Guo, Peng Zhang, Lixin Zou, Zhou Xu, Qianming Luo, An Engineering Hunan University School of Electrical and Information Changsha China

ISBN: (纸本)9798350396867

The efficiency and total harmonic distortion (THD) of high-frequency hybrid power amplifiers are two major challenges for the impedance measurement and emulator of power grids. This paper proposes a collaborative model predictive control (CMPC) for high-frequency hybrid power amplifiers with high efficiency and low THD. Compared to conventional methods with large loss and a large number of power devices, the proposed CMPC can improve the efficiency and achieve high utilization of switching frequency. CMPC based on the low-carrier-ratio method can improve the utilization of switching frequency. To reduce the loss of the analog power amplifier, only 3rd, 5th, 7th and 9th harmonics are compensated by the analog power amplifier. Online modification of switching angles is used for low THD. Finally, the performance of CMPC is verified by simulation results. When the carrier ratio is S, the efficiency is S9.29% and THD is 0.18% at full output power. © 2023 IEEE.

关键词： Model predictive control

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Research on tree barrier measurement method based on monocular image depth estimation 3

Research on tree barrier measurement method based on monocul...

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3rd international conference on Signal Image Processing and Communication, ICSIPC 2023

作者： Mu, Xiaofei Liu, Hongxi Fang, Jun School of Information and Control Engineering Jilin Institute of Chemical Technology Jilin China School of Electrical and Information Engineering Changchun Institute of Engineering Changchun China

ISBN: (纸本)9781510670945

Tree barrier plays a vital role in transmission lines, and its existence directly affects the stable supply of electricity. Therefore, it is necessary to measure and inspect the tree barrier. For this purpose, this paper proposes a measurement method based on monocular image depth estimation. In this method, the LSD (Line Segment Detector) algorithm is used to detect the straight line, and the RANSAC (RANdom SAmple Consensus) algorithm is used to iteratively detect the vanishing point, and the vanishing point coordinates are successfully obtained. The camera calibration is carried out to determine the pixel coordinates of the object in the image and to obtain the internal and external parameters and rotation matrix of the camera. Through coordinate system transformation, the depth estimation of the target in the world coordinate system and the distance between any tree lines can be accurately calculated. Finally, the height of the camera is used as the reference height to complete the measurement of the tree barrier around the wire, and the experimental results show that the method has certain feasibility and the error is controlled within a reasonable range. © 2023 SPIE.

关键词： Electric lines

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Research on clutch thermal control during mode transition in hybrid vehicles 3

Research on clutch thermal control during mode transition in...

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3rd international conference on Advanced Manufacturing Technology and Manufacturing Systems, ICAMTMS 2024

作者： Jing, Junchao Zuo, Yun Liu, Yiqiang Zhao, Fucheng Dai, Zhengxing Ningbo Geely Royal Engine Components Co. Ltd. Zhejiang Ningbo China

ISBN: (纸本)9781510681804

In order to tackle the issue of increased clutch surface temperature in hybrid transmission vehicles during heavy load acceleration, a thorough analysis was carried out to examine the impact of acceleration stages on temperature rise. This study investigates the reasons behind excessive heat generation in the clutch during high torque acceleration, as well as the primary factors influencing slip work production. Several calibration strategies are proposed to address overheating problems during high torque acceleration, and optimized calibration along with real-world vehicle testing are also performed for comparison. The results of the tests show that this calibration approach effectively demonstrate a 78.3% improvement in max C0 clutch temperature during transition, ultimately leading to enhanced drivability. © 2024 SPIE.

关键词： Clutches

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Design, control and Simulation of a Leg-Wheel Robot: STransleg

Design, Control and Simulation of a Leg-Wheel Robot: STransl...

引用

Computer, control and robotics (ICCCR), international conference on

作者： Zhong Wei Jiwen Zhang Yang Yang Shen Xiang Huiyu Sun Aiguo Song School of Automation C-IMER and CICAEET Nanjing University of Information Science and Technology Nanjing China School of Automobile and Rail Transit Nanjing Institute of Technology Nanjing China School of Instrument Science and Engineering Southeast University Nanjing China

A versatile leg-wheel robot called STransleg is proposed in this paper. STransleg is propelled by four identical leg-wheel mechanisms, which can transform between the legged and wheeled modes. The leg has three active joints in the legged mode, and the wheel is active in the wheeled mode. The waist yaw and pitch joints are introduced to STransleg to improve the locomotion flexibility and stability. In this paper, the design and kinematics modeling methods of STransleg are described. Additionally, the control method is proposed for STransleg to make it do the four-wheeled locomotion, walking locomotion, and carriage-like locomotion. The simulations are carried out to make the dynamical model of STransleg do the different locomotion, and the results verify the feasibility of the robot design method and the proposed control method.

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Multi-scale Architecture for High Performance RSVP Classification 3rd

Multi-scale Architecture for High Performance RSVP Classific...

引用

3rd international conference on Artificial-Business Analytics, Quantum and Machine Learning: Trends, Perspectives, and Prospects, Com-IT-Con 2023

作者： Chaudhary, Priyanshu Dhankhar, Nischay Singhal, Amit Rana, K.P.S. Department of Electronics and Communication Engineering Netaji Subhas University of Technology Sector-3 Dwarka New Delhi110078 India Department of Instrumentation and Control Engineering Netaji Subhas University of Technology Sector-3 Dwarka New Delhi110078 India

ISBN: (纸本)9789819725076

The ability to directly control external equipment using electrical impulses to translate brain activity into commands or information has made brain-computer interfaces (BCI) an increasingly relevant research topic. Numerous uses for this technology have been discovered, including cursor control, wheelchair navigation, and use in diverse sectors. In this paper, a unique EEGNet-inspired Multi-Scale architecture is proposed, which is intended to boost Rapid Serial Visual Presentation (RSVP) task categorization performance. The performance of our suggested architecture is assessed using the datasets from BCI Competitions II and III, and accuracy of 76.3%, 84.2%, and 90.5% is achieved for subjects II-A, II-B, and IIb, respectively. The average symbols recognized under repetition metric is also used to evaluate the proposed architecture. These results show a notable improvement in accuracy and other evaluation metrics compared to previous research. Overall, the proposed architecture advances the field of BCI technology and offers a fresh, potentially effective method for enhancing RSVP categorization task performance. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Brain computer interface

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Research on Coal and Gangue Recognition Method Based on Improved MobileNetV3 Network

Research on Coal and Gangue Recognition Method Based on Impr...

引用

Computer, control and robotics (ICCCR), international conference on

作者： Wei Chen Shuang Wang Qisheng Luo Xin Li Collaborative Innovation Center of Mine Intelligent Equipment and Technology College of Mechanical Engineering Anhui University of Science and Technology Huainan Anhui China

In order to solve the problems of classical convolutional neural networks in coal and gangue recognition, such as large calculation amounts, slow recognition speeds, and low recognition accuracy, a method for coal and gangue recognition based on an improved MobileNetV3 network is proposed. Based on the MobileNetV3 model, the activation function and attention mechanism were improved and the number of network layers was reduced. Finally, the accuracy rate, F1 score, and floating-point operation (FLOPs) were used as the benchmark for model evaluation. The results showed that: The test accuracy rate after the improved MobileNetV3 is 99.5%, the F1 score is 0.995, and FLOPs is 50455003. A comparison between the model and the MobileNetV3, EfficientNet, and AlexNet models shows that all indicators of the model are higher than those of other models. Suitable for coal gangue recognition model.

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Urgency Coefficient and Responsibility Coefficient Facilitate the Evolution of Cooperation in Multi-Agent Systems 3

Urgency Coefficient and Responsibility Coefficient Facilitat...

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3rd international conference on Artificial Intelligence and Computer engineering, ICAICE 2022

作者： Zhao, Zhengwu Zhang, Chunyan Zhang, Jianlei Department of Automation College of Artificial Intelligence Nankai University Tianjin300071 China Tianjin Key Laboratory of Intelligent Robotics Nankai University Tianjin300071 China

ISBN: (纸本)9781510663473

Task allocation is a significant topic in the field of artificial intelligence, and ideas for solving this problem are often drawn from the widespread phenomenon of division of labor in nature. For the problem that the existing labor division game model does not match the characteristics of the large-scale division of labor scenarios, We propose a new model named division of labor within community game(DOLC). The article establishes the mathematical model of DOLC, then we investigate the effects of selection intensity, urgency coefficient and responsibility coefficient on the evolution of division of labor. We derived the following conclusions: When both urgency and responsibility coefficients are zero, this causes the tragedy of DOLC, while group has the opportunity to maintain the division of labor if one of them is positive. The responsible group has always been cooperative. Relative to urgency coefficient, responsibility coefficient plays a more noticeable role in facilitating the evolution of cooperation in population. DOLC model is well suited to task allocation problem in multi-agent systems, and the findings of this article provide new insights for improving the intelligence of unmanned systems and optimizing task allocation and scheduling. © 2023 SPIE.

关键词： Multi agent systems

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Research on Efficiency Optimization control of Full SiC Converter for Urban Rail Energy Storage System 3rd

Research on Efficiency Optimization Control of Full SiC Conv...

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3rd international conference on Information control, Electrical engineering, and Rail Transit, ICEERT 2023

作者： Chen, Lin Xie, Xiaoyong Han, Lun Shu, Tiancheng Sun, Hu Diao, Chuanfei Power Supply Branch Company Affiliated With Beijing Mass Transit Railway Operation Corp LTD Beijing China School of Electrical Engineering Beijing Jiaotong University Beijing China

ISBN: (纸本)9789819788903

The energy consumption of urban rail transit in China has become a growing concern due to its continuous expansion. In recent years, the ground-based energy storage systems have been widely implemented in urban rail transit to absorb regenerative braking energy, resulting in significant energy savings. However, the current bidirectional DC/DC converter used in these systems utilizes Si IGBT (Silicon Insulated Gate Bipolar Transistor) as the switching device, leading to large converter volumes and masses due to its low switching frequency. In certain substations with limited installation space, the excessive volume of the converter becomes a critical factor restricting the power level of the energy storage system. To address this issue, the research investigates the characteristics of the full SiC converter by replacing the Si IGBT switching device with SiC MOSFET. Additionally, a converter efficiency optimization control strategy is proposed based on the relationship between converter loss and operating power. The strategy involves adjusting the number of bridge arms and can enhance the efficiency of the system. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Insulated gate bipolar transistors (IGBT)

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Causality-Free Modeling of a Floating Wind Turbine Semisubmersible Platform with Validation Results 3

Causality-Free Modeling of a Floating Wind Turbine Semisubme...

引用

3rd Modeling, Estimation and control conference (MECC)

作者： Sarker, Doyal Hasan, Tajnuba Ngo, Tri Das, Tuhin Univ Cent Florida Dept Mech & Aerosp Engn Orlando FL 32816 USA

ISBN: (纸本)9781713872344

This paper presents an acausal modeling approach for developing a hydrodynamic module in the control-oriented, Reconfigurable, and Acausal Floating Turbine Simulator (CRAFTS), a wind turbine simulation tool being developed by the authors, to facilitate control co-design of floating offshore wind turbines (FOWTs). The available data of the semi-submersible VolturnUS-S FOWT is incorporated into the modeling, simulation, and control demonstrations. The model is verified and validated using numerical data from industrial-standard simulation platform OpenFAST and experimental data from the Floating Offshore-wind and controls Advanced Laboratory (FOCAL) Project. Numerical results demonstrate that the hydrodynamic module in CRAFTS can qualitatively capture loads and responses from the free decay tests, as well as the stabilizing effects of the tuned mass dampers (TMDs), which are tuned to attenuate the platform pitch resonance or the tower bending resonance. Copyright (c) 2023 The Authors. This is an open access article under the CC BY-NC-ND license (https://***/licenses/by-nc-nd/4.0/)

关键词： Floating offshore wind turbine hydrodynamics modeling control co-design

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Design, Modeling, and control of a Millimeter -Range Flexure -Based Positioner for Dual -Stage 3D-Printing 3

Design, Modeling, and Control of a Millimeter -Range Flexure...

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3rd Modeling, Estimation and control conference (MECC)

作者： Baer, Ross Lewis, Andre L. Williams, Elizabeth M. Nagel, William S. Widener Univ Robot Engn Dept Chester PA 19013 USA

ISBN: (纸本)9781713872344

This paper presents the design of a compliant mechanism for secondary positioning actuation within a dual-stage three-dimensional (3D) -printer. Dual-stage structures consist of a low-speed, long-range actuator that displaces a serially-connected high-speed, short-range actuator. This work focuses on the mechanical design of the secondary planar actuator: a compliant mechanism guiding the motion of voice coil motors. The stiffness and range characteristics are tailored to compliment the long-range gantry positioner of the system, while achieving a mechanical bandwidth over 10x larger. Euler-Bernoulli beam theory with Castigliano's second theorem are leveraged to determine the effective stiffness of the mechanism;finite element analysis (FEA) is used to estimate the range and speed characteristics of the mechanism. A prototype positioner is manufactured via 3D -printing, and the experimental system is characterized. Simulations are performed on a linear model of the system using PID control with a complementary filter pair.

关键词： Additive manufacturing sensors and actuators compliant mechanisms mechatronic systems modeling

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