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2022 Chinese Automation Congress, CAC 2022

作者： Chen, Shiwei Fan, Junfang Wang, Wei Ji, Yi Liu, Ning Beijing Institute of Technology School of Aerospace Engineering Beijing100081 China Beijing Institute of Technology Beijing Key Laboratory of UAV Autonomous Control Beijing100081 China Beijing Information Science & Technology University Beijing Key Laboratory of High Dynamic Navigation Technology Beijing100192 China

ISBN: (纸本)9781665465335

Aiming at the terminal impact-angle constraint in the interception of large maneuvering targets by munition, this paper proposes a three-dimensional(3D) maneuvering target interception guidance law combined with the high-order fully-actuated (HOFA) system theory based on biased proportional navigation guidance (BPNG). First, a complete second-order nonlinear model with fully-actuation is built for munition-target relative motion without the small-angle assumption. Second, the nonlinear system of the munition-target relative motion is transformed into a quasi-feedback system, and a HOFA model is developed for the system. A BPNG law with the linear relationship of the line-of-sight angle is introduced to transform the closed-loop system into a linear time-invariant closed-loop system with the expected characteristic structure. Finally, target maneuver information is taken as the model compensation and adopted as the external input of the closed-loop system together with the remainder of the guidance law;thus, the channel coupling of the nonlinear three-dimensional system is eliminated. The effectiveness of the proposed method is verified by simulation results. © 2022 IEEE.

关键词： Closed loop systems

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A Robust Multi-AGV Cooperative Path Planning Method Considering Spatiotemporal Distance 5

A Robust Multi-AGV Cooperative Path Planning Method Consider...

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5th International Conference on Computer Engineering and Intelligent control, ICCEIC 2024

作者： Chen, Maolin Chen, Songhang Lian, Mingchang School of Advanced Manufacturing Fuzhou University Quanzhou China Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou China Fujian Provincial Key Laboratory of Intelligent Identification and Control of Complex Dynamic System Quanzhou China Fujian College University of Chinese Academy of Sciences Fuzhou China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou China

ISBN: (纸本)9798331507992

With the widespread application of Automated Guided Vehicles (AGVs) in warehousing and logistics systems, the optimization of multi-AGV path planning has become a critical issue. Current methods primarily focus on minimizing operating time and energy consumption but often overlook spatiotemporal distances between paths, leading to frequent path conflicts and interferences in the system. This paper proposes a neural network based time window estimation model, designed to generate time windows that better align with dynamic environments. Based on this model, we introduce a collaborative multi-AGV path planning method that optimizes spatiotemporal distances between paths. Compared to the Conflict-Based Search (CBS) method, this approach significantly improves the spatiotemporal distance between AGVs during task execution, enhancing the robustness of AGV clusters while only marginally increasing time costs. © 2024 IEEE.

关键词： Automatic guided vehicles

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Research on the characteristics of wireless power transfer in non-ferromagnetic metal pipe

Research on the characteristics of wireless power transfer i...

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2020 International Symposium on Electronic Information technology and Communication Engineering, ISEITCE 2020

作者： Li, Changsheng Liu, Yong Hu, Defu Sun, Wei Science and Technology on Electromechanical Dynamic Control Laboratory China Ministerial Key Laboratory of Zndy Nanjing University of Science and Technology Nanjing Jiangsu210094 China

With the development of various electronics, the way of transmitting energy by wire has brought increasingly negative effects on the operability and convenience of products. As wireless power transfer (WPT) technology requires no transmission lines, it has received increasingly wide attention. Most of the previous research on the technology of magnetic resonant coupling WPT mainly focused on the transmission of energy in the air. This paper establishes the wireless power transfer system model under non-ferromagnetic metallic environment and studies the effect of non-ferromagnetic metallic environment on coil self-inductance L, mutual inductance M and coil resistance R of WPT system. On this basis, the study on the relationship between coil diameter and mutual inductance is carried out for aluminium pipe, and the relationship between coil diameter and diameter of metal pipe at the maximum mutual inductance is fitted. Besides, experimental verification is conducted for the change of mutual inductance between the coils of WPT system in the aluminium pipe, presenting that the actual measurement results of mutual inductance in the aluminium pipe are consistent with the theory. © Published under licence by IOP Publishing Ltd.

关键词： Ferromagnetic materials

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A Fault Diagnosis Method of Actuator via Single Class Probability Density Learning 18th

A Fault Diagnosis Method of Actuator via Single Class Prob...

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18th Chinese Intelligent Systems Conference, CISC 2022

作者： Wang, Na Li, Yang Peng, Kun School of Control Science and Engineering Tiangong University Tianjin300387 China Tianjin Key Laboratory of Intelligent Control of Electrical Equipment University Tianjin300387 China Key Laboratory of low light level electromechanical system technology of Ministry of education Tianjin University Tianjin300387 China

ISBN: (纸本)9789811962028

A fault diagnosis method via Single Class Probability Density Learning for the actuator is proposed in this paper. Firstly, for the normal current data of the original actuator, the Fuzzy c-Means approach is combined with the matrix transformation. Then the Single Class Learning process is realized. Thus the distribution centers of the normal current data and the Probability Density control Threshold are obtained. On this basis, the fault diagnosis model is established. Secondly, for the actuator data to be tested, the Principal Component Analysis is adopted to reduce their dimension. Then the Affinity Propagation Clustering method is improved and the new centers of clustering are acquired by the test data. Additionally, the original distribution centers of current are compared with the new centers of clustering. So the actuator fault is diagnosed quickly. Finally, by some actuator measured data simulation, the effectivity of the proposed approach is verified in construct with the traditional methods. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Failure analysis

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Research on the Characteristics of Wireless Power Transfer in Ferromagnetic Metal Pipe 4

Research on the Characteristics of Wireless Power Transfer i...

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2020 4th International Conference on Electrical, Mechanical and Computer Engineering, ICEMCE 2020

作者： Li, Changsheng Sun, Wei Hu, Defu Liu, Yong Science and Technology on Electromechanical Dynamic Control Laboratory China Ministerial Key Laboratory of Zndy Nanjing University of Science and Technology Nanjing Jiangsu210094 China

With the development of society, radio energy transmission technology has been paid more and more attention. However, in the actual application environment, the surrounding metal environment has a significant impact on the radio energy transmission performance. Based on the technology of MRR radio energy transmission, this paper establishes a two coil radio energy transmission model, and analyzes the influence of metal environment on the coil self inductance L, mutual inductance m and coil resistance R of the radio energy transmission system by finite element simulation. On this basis, aiming at the ferromagnetic metal environment, the steel pipe is selected as the research object to study the relationship between coil diameter and mutual inductance in the metal pipe, and the relationship between coil diameter and metal pipe diameter when the maximum mutual inductance is obtained through fitting analysis. At the same time, through the experiment, the mutual inductance between the coils of the wireless energy system in the steel tube is verified, and the experimental results are very consistent with the theory. © Published under licence by IOP Publishing Ltd.

关键词： Ferromagnetic materials

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Design and Experimental Study of Magnetically Excited Variable Cross Section Bending Beam Piezoelectric Energy Harvester

SSRN

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SSRN 2024年

作者： Du, Fei Wang, Nengyong Ma, Tianbing Shi, Rui Yin, Liming Li, Changpeng College of Electromechanical Engineering Anhui University of Science and Technology Huainan232001 China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Anhui University of Science and Technology Huainan232001 China

In order to meet the self-powering requirements of wireless sensing nodes, a magnetically excited variable cross section ben ding beam piezoelectric vibration energy harvester(ME-VCB-PEH) is proposed in this paper. It aims to overcome the limitations of current piezoelectric energy harvesters, including, narrow collection bandwidth, single collection direction, low energy generation efficiency, low output voltage and low energy output. Firstly, based on Hamilton's principle, a nonlinear distribution parameter model of the energy harvester is established, and the optimal magnet spacing of the energy harvester is derived, which provides a theoretical basis for the subsequent research;Secondly, the optimal structural parameters of the monolithic variable cross section ben ding beam are derived from simulation and experiment;Finally, an energy harvesting test platform is constructed, and the output performance and application effect are tested. The results of the study show that the designed energy harvester can efficiently harvest vibration energy in all three axial directions below the external frequency of 80 Hz, with the best harvesting effect in the Z-axis, and its maximum instantaneous output power can reach 12.3 mW. Compared to rectangular and trapezoidal beams, the variable cross-section bent beam structure is characterized by lower frequency, wider bandwidth and higher output voltage. The designed ME-VCB-PEH is able to meet the demand of auxiliary power supply for temperature sensor and wireless transmission module under normal working conditions of the roadheader. It provides a technical reference for self-powered wireless sensing technology and plays an important role in the Internet of Things and sensing applications. © 2024, The Authors. All rights reserved.

关键词： Energy harvesting

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A mechanical model for polyhedral oligomeric silsesquioxane (Poss) reinforced amorphous polyethylene 6th

A mechanical model for polyhedral oligomeric silsesquioxane ...

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6th International Conference on Mechanical Structures and Smart Materials, ICMSSM 2020

作者： Li, Yufeng Xiong, Yanyi Fan, Chenyang Wang, Zhijun Xiao, Youcai The 713 Research Institute of China State Shipbuilding Corporation Limited Zhengzhou China College of Mechatronic Engineering North University of China Taiyuan030051 China Science and Technology on Electromechanical Dynamic Control Laboratory Xian710000 China

ISBN: (纸本)9783035736861

The mechanical behavior of polyethylene (PE) co-polymerized with polyhedral oligomeric silsesquioxane (POSS) was studied by using molecular simulations. Simulation configurations consisted of aligned PE chains with POSS were attached to the central chain and amorphous PE chains with different content POSS. From the simulations with aligned PE chains with POSS, it was found that the method for reinforcement was due to dislocation pile-up at POSS, and above a critical stress the dislocations traverse the POSS causing a sawtooth variation in the load-displacement curve. The stress-strain curves for amorphous PE-POSS bulk showed distinct elastic and plastic straining stages. Plastic straining consisted of hardening and slipping segments attributed to dislocation pile-up and chain sliding. Computational results were used to develop a reinforcement model to describe the mechanical response of PE-POSS bulk under uniaxial tension. © 2021 Trans Tech Publications Ltd, Switzerland Online: 2021-02-01.

关键词： Polyethylenes

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GPIO Based Iterative Learning control for Manipulators with Time-Varying Disturbances 42

GPIO Based Iterative Learning Control for Manipulators with ...

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42nd Chinese control Conference, CCC 2023

作者： Lu, Huangyuwei Wang, Zuo Sun, Jiankun Xiao, Xi Li, Shihua School of Automation Southeast University Nanjing210096 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Nanjing210096 China Shenzhen Research Institute Southeast University Shenzhen518063 China School of Artificial Intelligence and Automation Huazhong University of Science and Technology Wuhan430074 China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing211106 China

ISBN: (纸本)9789887581543

To improve the disturbance rejection ability and repetitive tracking accuracy of manipulators, a composite iterative learning control (ILC) scheme via generalized proportional integral observer (GPIO) is proposed. A high-order polynomial is first employed to model the time-varying disturbances that include unmodeled dynamics, parameter uncertainties and load fluctuations. A GPIO is then designed to estimate the disturbances and high-order time derivatives. By introducing estimations into a PD-type ILC at each iteration, a composite control scheme is obtained, such that the undesirable influence of time-varying disturbances can be effectively attenuated in the repetitive tracking process of manipulators. In this paper, the rigorous stability analysis of the closed-loop system is presented to guarantee that the tracking error exponentially converges to zero as the iteration number tends to infinity. The effectiveness of the proposed control scheme is finally verified by simulation results. © 2023 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Disturbance rejection

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A Dual-Band Rotational Feed Circularly Polarized RFID Reader Antenna Array with Stable Gain

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IEEE Antennas and Wireless Propagation Letters 2025年

作者： Wei, Kun Liu, Jie Xu, Rui Hu, Wei Chen, Chunhong Jiang, Wen Gao, Steven Xidian University National Key Laboratory of Radar Detection and Sensing Xi'an710071 China Science and Technology on Electromechanical Dynamics Control Laboratory Xi'an China School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing China Chinese University of Hong Kong Department of Electronic Engineering Hong Kong Hong Kong

In this letter, a dual-band rotational feed circularly polarized (CP) antenna array is proposed. The dual-band antenna element consists of two pairs of symmetric dipoles. The low-frequency CP radiation is achieved by the longer dipole pair, and the high-frequency radiation is mainly superimposed by the shorter dipole pair of the fundamental mode and the longer dipole pair of the higher-order mode. A compact and low-profile antenna array with a 1-to-4 rotational feeding network is introduced. The measured |S11| © 2002-2011 IEEE.

关键词： Circular polarization

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Genetic Algorithm for Block Relocation in Automated Warehouse 5

Genetic Algorithm for Block Relocation in Automated Warehous...

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5th International Conference on Artificial Intelligence Technologies and Applications, ICAITA 2023

作者： Wang, Gang Lian, Mingchang Ding, Wei Chen, Songhang Chen, Hao Quanzhou Institute of Equipment Manufacturing Haixi Institutes Chinese Academy of Sciences Quanzhou362200 China College of Computer and Cyber Security Fujian Normal University Fujian Fuzhou350001 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fujian Fuzhou350108 China Fujian Provincial Key Laboratory of Intelligent Identification and Control of Complex Dynamic System Quanzhou362200 China

ISBN: (纸本)9781643684840

This paper is based on the research background of block relocation in the automated warehouse and proposes a solution utilizing AGV to relocate goods within the warehouse. Building upon the automated warehouse layout and block relocation process, we formulate a mathematical model to minimize the the number of AGV moving goods and the total travel distance of the AGV. To solve the model, we develop an enhanced genetic algorithm, which zones the block relocation process into multiple stages. Each stage integrates conventional heuristic algorithms to enhance the efficiency of the solution process. The improved genetic algorithm can effectively solve the problem, significantly enhancing the automation level of the warehouse. © 2024 The Authors.

关键词： Genetic algorithms

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