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8th International Conference on Electromechanical control technology and Transportation, ICECTT 2023

作者： Zhang, Xinyue Wu, Wenxiang North China University of Technology Beijing Key Laboratory of Urban Road Intelligent Traffic Control Technology Beijing China

ISBN: (纸本)9781510668331

The activation of transit signal priority (TSP) will bring some delay savings to the vehicles running in the same direction, but also increase the delay of vehicles running in the conflicting direction. In order to quantify the impact of transit signal priority activation on the delay change of vehicles in the same direction and other directions, and limit its adverse impact on the overall delay of the road, this paper takes the mixed-traffic road without bus lane as the research object, and simulates the vehicle operation and signal timing scheme on the road with multiple intersections. With the goal of minimizing the total delay of social traffic flow and minimizing the negative impact of transit signal priority on the delay of road travelers, the coordinated timing control of signals at multiple intersections and selective activation of transit signal priority is realized, simulated annealing algorithm and implicit enumeration method are used to implement the model respectively. Finally, the delay of three types of road travelers under various signal schemes is compared. The results show that the optimization scheme can maximize the operation efficiency in the artery and reduce the adverse impact on the cross-street vehicles, so as to improve the operation condition of the vehicles on the road with multiple intersections and reduce the overall delay of the travelers. © 2023 SPIE.

关键词： Chemical activation

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Distributed Kalman filtering over sensor networks with fading measurements and random link failures

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Journal of the Franklin Institute 2023年第4期360卷 2457-2475页

作者： Zhu, Mingyan Sui, Tianju Wang, Rui School of Control Science and Engineering Dalian University of Technology Dalian116024 China School of Aeronautics and Astronautics Dalian University of Technology Dalian116024 China Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education Dalian116024 China Key Laboratory of Advanced Technology for Aerospace Vehicles Liaoning Province Dalian116024 China

This paper investigates the distributed state estimation problem for a linear time-invariant system characterized by fading measurements and random link failures. We assume that the fading effect of the measurements occurs slowly. Additionally, communication failures between sensors can affect the state estimation performance. To this end, we propose a Kalman filtering algorithm composed of a structural data fusion stage and a signal date fusion stage. The number of communications can be decreased by executing signal data fusion when a global estimate is required. Then, we investigate the stability conditions for the proposed distributed approach. Furthermore, we analyze the mismatch between the estimation generated by the proposed distributed algorithm and that obtained by the centralized Kalman filter. Lastly, numerical results verify the feasibility of the proposed distributed method. © 2023 The Franklin Institute

关键词： State estimation

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Establishment of Rate-Dependent Hysteresis Model and control Method of Piezoelectric Ceramic Actuator

Establishment of Rate-Dependent Hysteresis Model and Control...

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7th International Conference on Electronics technology, ICET 2024

作者： Qu, Lili Wang, Yanyan Huang, Yuanting Tianjin in University of Technology and Education Tianjin Key Laboratory of Information Sensing and Intelligent Control Tianjin300222 China

ISBN: (纸本)9798350363951

Piezoelectric ceramic actuators (PEA) are commonly utilized for accuracy orientation, precision measurement, vibration isolation, and other fields due to their high positioning accuracy and fast response speed. However, the inherent hysteresis of piezoelectric ceramics seriously influences their positioning precision. Studies have shown that the hysteresis of piezoelectric ceramics has rate-dependent properties. Based on this feature, this paper firstly designs an improved rate-dependent Bouc-Wen hysteresis model and uses particle swarm optimization to identify the model parameters. Secondly, the inverse hysteresis model is established, and a feed-forward controller based on the inverse model is designed to linearize the input and output of the PEA and improve its hysteresis. Finally, the model verification of the established hysteresis model and experimental verification of the feed-forward control method show that the rate-dependent hysteresis of the PEA can be well-fitted based on the improved rate-dependent Bouc-Wen hysteresis model. The experimental results demonstrate that the linearity of the output displacement of the piezoelectric actuator is significantly improved, and the hysteresis error is reduced from 21.9 % to 2.5 % at 1 Hz and from 2 5. 8 % to 7.1 % at 50 Hz, which verifies the validity of the proposed method. © 2024 IEEE.

关键词： Piezoelectric ceramics

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Coal-Rock Interface Image Segmentation Based on U2Net Model with Coordinate Attention 6

Coal-Rock Interface Image Segmentation Based on U2Net Model ...

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6th International Conference on intelligent Autonomous Systems, ICoIAS 2023

作者： Song, Chen Xu, Chunyu Tian, Muqin Chen, Rong Taiyuan University of Technology Shanxi Key Laboratory of Mining Electrical Equipment and Intelligent Control Taiyuan China

ISBN: (纸本)9798350371253

Fast and accurate extraction of segmented images of coal-rock interfaces is one of the most important technologies to realize intelligent operation of comprehensive mining face. In this paper, we propose a multi-mechanism fusion U2Net model for recognizing coal-rock interfaces with complex backgrounds and diverse morphologies. We construct the basic network module by replacing the ordinary convolution in RSU with depth-divisible convolution and expansion convolution;add the coordinate attention mechanism in the last layer of the sampling stage of the improved RSU module to construct a new residual structure;and combine this residual structure with the U2Net model to construct a new U2Net model to realize the automatic learning of segmented images of coal-rock interfaces. Among them, the expansion convolution can obtain a larger sensory field without reducing the resolution;the depth separable convolution helps to simplify the model;the coordinate attention mechanism can suppress the interference of each residual block in the encoding and decoding process, and improve the model performance at a small cost. Compared with the semantic segmentation models commonly used in deep learning, this method improves the accuracy of extracting features from different stages of coal rock images, reduces the model training cost, accelerates the convergence speed of the model, and improves the model's anti-interference. Experiments were conducted to compare U2Net-CA-DC with four semantic segmentation networks (FCN, SegNet, UNet, and U2Net) to verify the effectiveness of the improved model. The accuracy of the method is 95.31% and the mIOU is 93.46% on real coal rock image datasets collected from actual underground wells. The experimental results show that the method provides a new solution for coal rock image segmentation detection and can provide data support for coal rock image segmentation. © 2023 IEEE.

关键词： Convolution

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A Fast X-ray Pulsar Time Delay Estimation Method Based on Bispectral Feature Points and Cross-Correlation 42

A Fast X-ray Pulsar Time Delay Estimation Method Based on Bi...

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42nd Chinese control Conference, CCC 2023

作者： Huang, Zhiwei Zong, Hua Xu, Qian Li, Xiaomin Beijing Aerospace Automatic Control Institute National Key Laboratory of Science and Technology on Aerospace Intelligent Control Beijing100854 China

ISBN: (纸本)9789887581543

In order to improve the accuracy and real-time performance of X-ray pulsar time delay estimation over short-time observation interval, a method based on bispectral feature points and cross-correlation is proposed in this paper. Firstly, calculate the self-bispectrum of the standard pulsar profile, extract the bispectral feature points by PSO algorithm, and store it in the spacecraft. Secondly, the pulsar photons are received in real-time and get the observation profile by epoch folding. Thirdly, calculate the cross-bispectrum at the bispectral feature points, construct the objective function of time delay estimation, and solve the extremum. Finally, the pulsar time delay estimation is obtained by screening the extreme points using cross-correlation. Simulation experiments based on Insight-HXMT observations of the Crab pulsar show that, the average running time of the proposed algorithm is 41.59ms on Matlab R2017b, and the average estimation error at observation interval below 2.5s is 0.1858ms, which is better than the traditional bispectrum method and the selected bispectrum method. © 2023 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Pulsars

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DWGCN: A Route Recommendation Model Based on DeepWalk-Graph Convolutional network 12

DWGCN: A Route Recommendation Model Based on DeepWalk-Graph ...

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12th International Conference on Transportation and Traffic Engineering, ICTTE 2023

作者： Yang, Jian Li, Jinhong Gao, Lei Wei, Lu Beijing Key Laboratory of Urban Road Traffic Intelligent Control Technology North China University of Technology Beijing China

ISBN: (纸本)9781839539954

Route Recommendation has been the foundation of trip planning, and although there are many studies in the literature, there are still many challenges. The first one is the problem of how to accurately obtain the spatial features of the road network;the second one is the accessibility of the planned route. To solve these problems, we propose a new path planning model, DeepWalk Graph Convolutional network (DWGCN). The model learns the spatial features of the road network from historical trajectory data by DeepWalk combination with GCN. A Multi-Layer Perceptron component (MLP) is used to estimate the conditional transfer distribution. We finally validate the model with five real datasets, and the experimental results show that our model has some improvements in precision, recall rate and reachability compared with the benchmark model. © The Institution of Engineering & technology 2023.

关键词： Motor transportation

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Finite Element Analysis of Surface Abrasion Defect of Main Insulation for HV Motor Stator Winding 4

Finite Element Analysis of Surface Abrasion Defect of Main I...

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4th IEEE International Conference on Electrical Materials and Power Equipment, ICEMPE 2023

作者： Wang, Xin Lin, Lingyan Kang, Ailiang Chen, Zhanqing Li, Lu Taiyuan University of Technology Shanxi Key Laboratory of Mining Electrical Equipment and Intelligent Control Taiyuan China

ISBN: (纸本)9798350334678

During the operation of high voltage (HV) motor, the main insulation can be deteriorated and generate insulation defects. For instance, the insulation surface can be abraded due to mechanical stress. As a result, these defects, which are with poor dielectric property, become the local concentrations of electric stress. Besides, the environment around the insulation system is complicated and changeable, which changes the distribution of electrical field and electrical potential. In this paper, the finite element analysis (FEA) simulation was used to study the distribution of the electric potential, electrical field and current density of the 10kV stator windings with different abrasion thicknesses at different temperatures. The simulation results show that the more severe the insulation abrasion, the higher the electric field strength and current density in the copper conductor. The higher the ambient temperature, the higher the electric field strength and the lower the current density in the copper conductor. When the insulating material at the junction of the semi-conductive coating and the graded stress coating is abraded 1.56 mm at the temperature of 120°c, the current density and electric field strength in the copper conductor will suddenly increase. Besides, this paper also studies the propagation behavior of the current pulse signal after it is injected into the insulation defect of the winding. The simulation results show that the charge, the field intensity and the current density are all attenuate with the propagation of the signal. © 2023 IEEE.

关键词： Finite element method

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Voltage control Method for Offshore Floating Photovoltaic Storage Hydrogen Production DC System 25

Voltage Control Method for Offshore Floating Photovoltaic St...

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25th IEEE China Conference on System Simulation technology and its Application, CCSSTA 2024

作者： Liu, Hongbin Kong, Xiangyu Zhang, Delong Wang, Chunjie Jin, Hui Shao, Yangping Tianjin University of Technology Tianjin Key Laboratory of New Energy Power Conversion Transmission and Intelligent Control Tianjin China Tianjin University Key Laboratory of Smart Grid Tianjin China

ISBN: (纸本)9798350366600

To address the problems of high PV output volatility and unstable DC system voltage control caused by environmental influences on offshore floating photovoltaic hydrogen production systems, this paper proposes a voltage control method based on voltage stabilization for the DC system model of PV storage hydrogen production. Aiming to improve PV power generation quality and enhance system stability, this control method includes maximum power point tracking (MPPT) control for the floating PV system and adaptive coordinated control for the hydrogen storage system. These controls enable the optimal utilization of light resources while ensuring stable bus voltage. Finally, the effectiveness of the control method was verified by simulation. © 2024 IEEE.

关键词： Hydrogen storage

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Comparison of Three Data-Driven Networked Predictive control Methods for a Class of Nonlinear Systems

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IEEE/CAA Journal of Automatica Sinica 2022年第9期9卷 1714-1716页

作者： Zhong-Hua Pang Xue-Ying Zhao Jian Sun Yuntao Shi Guo-Ping Liu the Key Laboratory of Fieldbus Technology and Automation of Beijing North China University of TechnologyBeijing 100144China the State Key Laboratory of Intelligent Control and Decision of Complex Systems School of AutomationBeijing Institute of TechnologyBeijing 100081China the Center for Control Science and Technology Southern University of Science and TechnologyShenzhen 518055China

Dear Editor,In this letter,in order to deal with random network delays and packet losses in a class of networked nonlinear systems,three data-driven networked predictive control methods are *** closed-loop systems and... 详细信息

关键词： letter Nonlinear nonlinear

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Optimal layout design for photovoltaic shadow occlusion based on Sketchup and PVsyst 25

Optimal layout design for photovoltaic shadow occlusion base...

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25th IEEE China Conference on System Simulation technology and its Application, CCSSTA 2024

作者： Yu, Zilong Wang, Chunjie Kong, Xiangyu Yu, Lujie Shao, Yangping Jin, Hui Tianjin University of Technology Tianjin Key Laboratory of New Energy Power Conversion Transmission and Intelligent Control Tianjin China Tianjin University Key Laboratory of Smart Grid Tianjin China

ISBN: (纸本)9798350366600

As photovoltaic (PV) systems gain global popularity, effectively minimizing the impact of shading on PV system performance has become a significant design challenge. This paper introduces a systematic and comprehensive shading analysis method that integrates SketchUp and PVsyst software;by utilizing SketchUp for customized 3D modeling and high-precision shading analysis, this method can effectively identify and address shading issues that are difficult to detect using traditional methods, thereby optimizing module layout and enhancing overall system performance. Subsequently, PVsyst is used to simulate and evaluate system efficiency and losses under different conditions. The aim is to improve the accuracy and efficiency of PV system design and to provide a new approach to optimizing photovoltaic system design by combining 3D modeling with performance simulation. © 2024 IEEE.

关键词： Photovoltaic effects

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