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8th International Conference on automation, control and Robotics engineering, CACRE 2023

作者： Lu, Guangda Dai, Jianyi Qin, Zhuanpin Guo, Tinghang Han, Yu Wei, Mingzhi Automation and Electrical Engineering College Tianjin University of Technology and Education Tianjin Key Laboratory of Information Sensing and Intelligent Control Tianjin China

ISBN: (纸本)9798350302776

A farmland intelligent monitoring and irrigation system based on the Internet of Things and 5G technology is designed. The system mainly includes two templates: intelligent monitoring system and intelligent control system, in which the intelligent monitoring system is mainly responsible for detecting soil temperature and humidity and trace elements such as nitrogen, phosphorus and potassium, and the intelligent control system is mainly responsible for remote operation of intelligent irrigation. The system measures soil temperature, humidity and trace elements such as nitrogen, phosphorus and potassium through the sensors in the intelligent monitoring section, and uses 5G wireless transmission technology to send the data collected by the sensors to the Internet of Things, which then transmits the collected information to a mobile app. The system can solve the shortcomings of traditional irrigation methods which are cumbersome and seriously inefficient in irrigating agricultural facilities. © 2023 IEEE.

关键词： Soil temperature

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A Real-Time Detection Approach for Catenary Geometry Parameters in Complex Scenes 6

A Real-Time Detection Approach for Catenary Geometry Paramet...

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6th International Conference on Electronics Technology, ICET 2023

作者： Yue, Ya Liu, Quanli Wang, Wei Zhao, Xiaoguang Wang, Zhigang Dalian University of Technology School of Control Science and Engineering Dalian China Dalian Seasky Automation Co. Ltd Dalian China

ISBN: (纸本)9798350337693

The reliability of pantograph-catenary system directly affects the operational safety of electric buses, and the catenary geometry parameters (CGP) is an important indicator reflecting the current-receiving quality by the pantograph. Although some methods have been used to detect CGP in practice, in some complex scenarios, such as overlap and overhead crossing, there will be multiple contact wires and messenger wires at the same time, which may lead to missed detection or false positives. Aiming at this situation, this paper presents a real-time detection method of CGP in railway. Based on the principle of laser triangulation, the detection method combines image difference with contact wire detection and tracking to locate the target laser spot. On the basis of three-dimensional reconstruction of linear structured light, spatial coordinate conversion is completed, and then CGP is obtained. Finally, high-precision detection values are obtained by combining with vibration compensation module. Experimental results show that this method can effectively detect CGP in complex scenes in real-time with high accuracy. © 2023 IEEE.

关键词： Electric buses

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Metro Railway Traffic Safety Detection Based on An Attention Improved Network 5

Metro Railway Traffic Safety Detection Based on An Attention...

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5th International Conference on Industrial Artificial Intelligence, IAI 2023

作者： Liu, Xiaobin Liu, Quanli Wang, Wei Yu, Zichen Zhao, Xiaoguang Dalian University of Technology School of Control Science and Engineering Dalian China Dalian Seasky Automation Co. Ltd Dalian China

ISBN: (纸本)9798350325294

The majority of causes that contribute to metro railway traffic accidents can be attributed to human errors. The widespread application of railway perception systems is expected to reduce the occurrence rate of railway traffic accidents. A metro railway perception system is designed to sense the surrounding environment, and it plays a crucial role in ensuring the safety of metro railway transportation systems. Based on the actual scenario of Dalian Metro Line 202, a detection method is proposed to complete the task of metro railway traffic detection. The extract ability of the backbone is enhanced by aggregating the hierarchical feature map. By introducing attention module, adopting decoupled detection head and adding extra object detection head, the detection ability of network for objects is promoted and the proposed network achieves satisfactory results in real scenarios. © 2023 IEEE.

关键词： Object detection

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Towards Efficient Path Finding and Moving Stability-Focused Trajectory Planning for Mobile Robots

Towards Efficient Path Finding and Moving Stability-Focused ...

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2024 IEEE International Conference on Robotics and Biomimetics, ROBIO 2024

作者： Hou, Muyang Lei, Zhenya Hu, Haidong Wang, Zhong Wang, Yong Xie, Le Wang, Hesheng Shanghai Jiao Tong University Department of Automation Shanghai200240 China School of Information and Control Engineering China University of Mining and Technology Xuzhou221116 China Beijing Institute of Control Engineering Beijing100190 China Institute of Medical Robotics Shanghai Jiao Tong University Shanghai200240 China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing of Ministry of Education Key Laboratory of Marine Intelligent Equipment and System of Ministry of Education Department of Automation Shanghai200240 China

ISBN: (纸本)9781665481090

Nowadays, mobile robots play an important role in a variety of service scenarios. They need to plan and track trajectories to accomplish tasks such as delivery or guided tours. In such tasks, there are two remaining challenges: on one hand, the time and memory consumption of present path planners are still significant;on the other hand, service robots, which have a higher center of gravity, demand greater moving stability than that of current trajectory planners provide. To address these two challenges. Firstly, we propose a safety boundary first A∗ which fully utilizes environmental obstacle information to create a safety boundary and searches in it to quickly find an initial path. Secondly, we formulate the trajectory optimization problem as a nonlinear optimization problem, where the smoothness, safety, feasibility, and moving stability of the robot are taken into account. Furthermore, to constrain the robot's lateral acceleration, we design a time allocation algorithm based on non-uniform B-spline, enhancing the quality of the resulting trajectory. Simulations and real-world experiments demonstrate that our algorithms significantly improve path search efficiency, enhance moving stability, reduce the difficulty of tracking, and improve the quality of task completion. © 2024 IEEE.

关键词： Trajectories

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Receding horizon control for continuous-time mean-field systems

Receding horizon control for continuous-time mean-field syst...

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作者： Gao, Rong Liu, Junzhe Zhang, Fang Xu, Juanjuan Wang, Hongxia School of Mathematics and Statistics Science Ludong University Yantai China School of Control Science and Engineering Shandong University Jinan China College of Electrical and Automation Engineering Shandong University of Science and Technology Qingdao China

In this paper, we study the receding horizon control (RHC) stabilization of continuous-time mean-field system. An explicit RHC controller is obtained by introducing a cost function with two terminal matrices and the conditions that make the system stable are also obtained;that is, when two coupled Lyapunov inequalities are satisfied, the system controlled by RHC is stabilized. Finally, a simulation example is given to verify the effectiveness of the proposed strategy. © 2023 Chinese Automatic control Society and John Wiley & Sons Australia, Ltd.

关键词： Stabilization

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Cutting force modeling in high-speed machining of selective laser melted Ti6Al4V alloys based on a modified constitutive model considering thermally activated effect

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Science China(Technological Sciences) 2025年第3期68卷 138-155页

作者： Dejian LIU Chenbing NI Youqiang WANG Lida ZHU Zhongpeng ZHENG Wei LU Naixin ZHANG Xingbao HUANG School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao266520China Key Lab of Industrial Fluid Energy Conservation and Pollution Control Ministry of EducationQingdao266520China School of Mechanical Engineering and Automation Northeastern UniversityShenyang110819China School of Mechanical Engineering Tsinghua UniversityBeijing100084China Shandong Zhongheng Jingxin Carbon Fiber Technology Development Co. LtdDezhou251100China State Key Laboratory of Bridge Safety and Resilience College of Civil EngineeringHunan UniversityChangsha410082China

The thermally activated effect can produce a vital influence on the mechanical property and cutting force of metal materials in the machining *** insight can be gained into the action criteria of the thermally activated effect on the cutting force,which provides a solid basis of the research of material performance and *** this study,a cutting force model of selective laser melted(SLMed)Ti6Al4V alloy is proposed by introducing the modified constitutive model with thermally activated effects and the analytical model of the deformation zone into the cutting force *** anisotropic properties of SLMed Ti6Al4V alloy under different scanning strategies(0°,67.5°,and 90°)are explored by combining with the cutting force model,constitutive model and analytical model of deformation zone(primary deformation and tool-chip contact area).The action of thermally activated effects on the cutting force,primary deformation and tool-chip contact zone is also researched in *** experiments and predictions of SLMed Ti6Al4V alloy under different scanning strategies have been implemented to reveal the effectiveness of this new *** comparison results indicate that the proposed milling force model can effectively predict milling force and reflect well on the anisotropy of SLMed Ti6Al4V *** addition,this proposed force model can well analyze the action mechanism of the thermally activated effect on the milling force of SLMed Ti6Al4V alloy,which is significantly essential for the machining mechanism research in terms of a microscopic perspective.

关键词： cutting force model modified constitutive model thermally activated effect SLMed Ti6Al4V alloy laser scanning strategies anisotropic properties

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Fault diagnosis for wasterwater treatment plant based on an improved support vector data description method

Fault diagnosis for wasterwater treatment plant based on an ...

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2023 CAA Symposium on Fault Detection, Supervision and Safety for Technical Processes, SAFEPROCESS 2023

作者： Zhou, Meng Song, Weiwei Wang, Jing Wang, Chang North China University of Technology School of Electrical and Control Engineering Beijing China Beijing Aerospace Automation Research Institute Beijing China

ISBN: (纸本)9798350337754

In this paper, a fault detection method based on improved support vector data description is proposed for wastewater treatment plants. First, an improved Multi-Kernel Support Vector Data Description (MKSVDD) method is presented in which multicore-kernel functions are combined with the traditional support vector data description method. This can make the model more adaptable to different input samples, allowing it to have both learning and generalization capabilities. Then, the parameters of the MKSVDD are optimizted by Sparrow Search Algorithm (SSA), which overcomes randomness and uncertainty of human manual adjustment parameters. Finally, simulation results are given to demonstrate the effectiveness of the proposed method. Nine types of fault data sets generated by the Benchmark Simulation Model 1 (BSM1) are used and simulations results show that the model is more adaptable to the samples and has better indicators for anomaly detection compared to the original algorithm. © 2023 IEEE.

关键词： Wastewater treatment

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Alertness Analysis from EEG Signals based on Temporal Complex Network Features 16

Alertness Analysis from EEG Signals based on Temporal Comple...

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16th International Congress on Image and Signal Processing, BioMedical engineering and Informatics, CISP-BMEI 2023

作者： Wei, Beibei Han, Chunxiao Chen, Yi Che, Yanqiu Qin, Yingmei Li, Shanshan Tianjin University of Technology and Education Tianjin Key Laboratory of Information Sensing & Intelligent Control School of Automation and Electrical Engineering Tianjin China

ISBN: (纸本)9798350330755

Fatigue driving is a major contributor to traffic accidents, as it reduces alertness and can even be fatal. To investigate alertness changes during prolonged driving, we first built a simulated driving experiment platform and designed an alertness detection experiment. Electroencephalogram (EEG) signals were collected during prolonged fatigue driving from 16 subjects. For each subject, the driving process was divided into eight stages from T0-T7. Then, the alertness level was analyzed by temporal complex network method based on multiplex limited penetrable visibility graphs from the collected EEG signals. The clustering coefficient, path length and global efficiency of the constructed complex network were extracted for each driving stage under five typical brain rhythms including delta, theta, alpha, beta, and gamma. The results indicate that after a long stage of driving, the clustering coefficient and path length show an overall increasing trend, while the global efficiency reveals an overall decreasing trend. Our findings may provide indicators for monitoring alertness level. © 2023 IEEE.

关键词： Complex networks

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control law design for localizer pre-capture based on integrated navigation 2

Control law design for localizer pre-capture based on integr...

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2nd International Symposium on Aerospace engineering and Systems, ISAES 2023

作者： Zhang, Jiahao Meng, Fandong Zhou, Chao Gao, Zhiyuan School of Mechatronic Engineering and Automation Shanghai University Shanghai China Comac Aircraft Electronics Electrical and Control Integration Division Shanghai China

ISBN: (纸本)9798350303728

To enhance the performance of automatic landing systems for commercial aircraft, a control law of localizer pre-capture was developed based on the maximum pitch angle limit of the approach, the characteristics of the aircraft and localizer, and the fusion signals of the integrated navigation are used to delineate the approach paths and adjust the intercept angle. The modeling and simulation of the control law was implemented using MATLAB/Simulink. The simulation results show that the designed control law can guide the aircraft into the linear beam range of the localizer with appropriate intercept angle in various complex situations. The proposed method can provide a reference for further research of automatic flight control system for commercial aircraft. © 2023 IEEE.

关键词： Air navigation

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Trajectory Planning of Robot Terminal Pose by Interpolation Method 38

Trajectory Planning of Robot Terminal Pose by Interpolation ...

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38th Youth Academic Annual Conference of Chinese Association of automation, YAC 2023

作者： Chen, Biao Hu, Shan Bing, Zhigang Tianjin University of Technology and Education Tianjin Key Laboratory of Information Sensing Intelligent Control School of Automation and Electrical Engineering Tianjin China

ISBN: (纸本)9798350303636

In order to improve the stability of the robot at work, this paper adds an insertion point between the end of the robot and the next target point, and changes the original linear trajectory to a new trajectory planned by interpolation method. The simulation experiment is carried out in MATLAB software. The interpolation method curve is compared with the linear curve. The optimization results show that the velocity and acceleration curves under the interpolation method become more gentle, which verifies the effectiveness of the method. © 2023 IEEE.

关键词： interpolation method linear posture robot

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