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3rd IEEE Eurasia Conference on IOT, Communication and engineering, ECICE 2021

作者： Pu, Yongfan Wei, Xubo Liu, Zhao Chengdu University of Technology The College of Nuclear Technology and Automation Engineering Chengdu610059 China

ISBN: (纸本)9781665445160

A 350 kV/20 mA high voltage DC power supply for X-ray tube is designed to use as a control circuit with Digital Signal Processor (DSP). The power use the 380 V/50 Hz three-phase electric as input signal, and output high voltage via rectifier filter, full bridge inverter, transformer booster and voltage doubling rectifier. The inverter circuit implements voltage adjustment by generating SPWM of different duty ratios in DSP. The Maxwell software is employed to calculate the distribution of the electric field as designing the transformer, and the maximum field strength is 78.521 kV/mm in winding. It is available to design the layer insulation of transformer windowing with the polyimide film in accordance with the electric field. Voltage doubling rectifier circuit uses C-W positive and negative two-way voltage doubling rectifier circuit which is a wide application in X-ray Optical Source. The numerical simulation indicates that the overall design of power is legitimate and the parameters can reach the expected requirements. © 2021 IEEE.

关键词： Digital signal processing

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Research on Displacement Measurement Device Dropped with UAV to Apply to Monitoring Geologic Hazard near Pylons in Sichuan-Chongqing Aera 2

Research on Displacement Measurement Device Dropped with UAV...

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2nd International Conference on Computational Modeling, Simulation and Data Analysis, CMSDA 2022

作者： Yu, Jiahao Sun, Wencheng Qin, Zhangjian Chengdu University of Technology Nuclear Technology and Automation Engineering Chengdu610059 China Southwest Branch of State Grid Corporation of China Chengdu610059 China

ISBN: (纸本)9798350345759

It is necessary to monitor geologic hazard near pylons in Sichuan-Chongqing aera by means of displacement measurement. A Displacement Measurement Device (DMD) dropped with Unmanned Aerial Vehicle (UAV) should be designed and implemented because it is very difficult to mount the device on the steep mountain. Difference position technology applys in the DMD based on the Beidou satellite navigation system. The appearance of DMD is regular tetrahedral which is very stable when the device lands on either side dropped with UAV. The antennas of the DMD are placed in a sphere which always face the satellite because the spherical structure like a roly-poly toy standing still. The DMDs are mounted on the H08 landslide and H10 landslide, which are potential landslide near pylons in Sichuan-Chongqing aera. The DMDs are dropped with UAV and now are running stably. © 2022 IEEE.

关键词： Landslides

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Variance-Constrained Filtering Fusion for Nonlinear Cyber-Physical Systems With the Denial-of-Service Attacks and Stochastic Communication Protocol

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IEEE/CAA Journal of Automatica Sinica 2022年第6期9卷 978-989页

作者： Hang Geng Zidong Wang Yun Chen Xiaojian Yi Yuhua Cheng IEEE School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China Department of Computer Science Brunel University LondonUxbridgeMiddlesexUB83PHUnited Kingdom Key Laboratory for IoT and Information Fusion Technology of Zhejiang School of AutomationHangzhou Dianzi UniversityHangzhou 310018China School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081China

In this paper,a new filtering fusion problem is studied for nonlinear cyber-physical systems under errorvariance constraints and denial-of-service *** prevent data collision and reduce communication cost,the stochastic communication protocol is adopted in the sensor-to-filter channels to regulate the transmission order of *** sensor is allowed to enter the network according to the transmission priority decided by a set of independent and identicallydistributed random *** the defenders’view,the occurrence of the denial-of-service attack is governed by the randomly Bernoulli-distributed *** the local filtering stage,a set of variance-constrained local filters are designed where the upper bounds(on the filtering error covariances)are first acquired and later minimized by appropriately designing filter *** the fusion stage,all local estimates and error covariances are combined to develop a variance-constrained fusion estimator under the federated fusion ***,the performance of the fusion estimator is examined by studying the boundedness of the fused error covariance.A simulation example is finally presented to demonstrate the effectiveness of the proposed fusion estimator.

关键词： Cyber-physical system(CPS) denial-of-service attack stochastic communication protocol(SCP) variance-constrained filtering fusion

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Research on Broadband Complex Electromagnetic Environment Signal Simulation technology Based on Channel Reconstruction 16

Research on Broadband Complex Electromagnetic Environment Si...

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16th IEEE International Conference on Electronic Measurement and Instruments, ICEMI 2023

作者： Wang, Zhengli Tian, Shulin Tian, Yu Zeng, Hao Lyu, Jianhong Wang, Meng College of Automation Engineering University of Electronic Science and Technology of China Chengdu China The 29th Research Institute of China Electronics Technology Group Corporation Corporation Chengdu China

ISBN: (纸本)9798350327144

Based on an efficient channelized structure, this research focuses on channelized reception, channel reconstruction transmission, and baseband signal generation. A broadband complex electromagnetic signal simulation method is proposed, and a design of the simulation scheme for broadband complex electromagnetic signals is implemented using domestically produced devices. Through simulation and experiments, it is demonstrated that this method can achieve multi-target simulation capability in a complex electromagnetic environment with an instantaneous bandwidth of 4 GHz. It can also be extended for applications in radar target simulators ranging from 0.8 GHz to 18 GHz. © 2023 IEEE.

关键词： Electromagnetic simulation

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Adaptive Composite Fixed-Time RL-Optimized Control for Nonlinear Systems and Its Application to Intelligent Ship Autopilot

IEEE Transactions on Artificial Intelligence

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IEEE Transactions on Artificial Intelligence 2025年第1期6卷 66-78页

作者： Liu, Siwen Zuo, Yi Li, Tieshan Wang, Huanqing Gao, Xiaoyang Xiao, Yang Navigation College Dalian Maritime University Dalian116026 China University of Electronic Science and Technology of China School of Automation Engineering Chengdu611731 China Yangtze Delta Region Institute University of Electronic Science and Technology of China Huzhou313000 China Bohai University College of Mathematical Sciences Jinzhou121000 China The University of Alabama Department of Computer Science TuscaloosaAL35487-0290 United States

In the article, an adaptive fixed-time reinforcement learning (RL) optimized control policy is given for nonlinear systems. Radial basis function neural networks (RBFNNs) are exploited to fit uncertain nonlinearities appeared in the considered systems and RL is applied under the critic-actor architecture by using RBFNNs. Specifically, a novel fixed-time smooth estimation system is proposed to improve the estimating performance of RBFNNs. The introduction of the hyperbolic tangent function effectively avoids the singularity problem of the derivative of the virtual controller. The stability analysis shows that the tracking error inclines to an adjustable region near the origin in a fixed-time interval and the boundedness of all signals is obtained. Finally, the intelligent ship autopilot is simulated to prove the utilizability of the obtained control way. © 2024 IEEE.

关键词： Radial basis function networks

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A digital multi-channel system based on parallel full comparison baseline restoration method

A digital multi-channel system based on parallel full compar...

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Electronic Information engineering and Computer Communication (EIECC), International Conference on

作者： Yang Liu Mingxing Xu Guangxi Wang Yufeng Yang College of Nuclear Technology and Automation Engineering Chengdu University of Technology Cheng Du China Applied Nuclear Technology in Geosciences Key Laboratory of Sichuan Province (Chengdu University of Technology) Cheng Du China

ISBN: (数字)9798331534622

ISBN: (纸本)9798331534639

This paper designs a baseline estimation digital energy spectrum measurement system using a parallel full-comparison method, aimed at reducing the impact of baseline drift on the energy resolution of the digital energy spectrum measurement system. The system consists of two parts: an analog baseline adjustment circuit and a digital baseline estimation module. The digital module first performs baseline estimation, then transmits the results to the frontend circuit to adjust the baseline, thereby correcting drift caused by circuit noise and signal pulse stacking. The system is mainly composed of a DAC baseline adjustment circuit, an ADC sampling circuit, and an FPGA-based digital multi-channel analysis system, in which a parallel full-comparison mean baseline estimation method is deployed to calculate the baseline adjustment amount. To verify the reliability of the system, NaI detectors were used in this study, and the energy resolution and response of the system were tested using dual-source 137 Cs and 60 Co. The experimental results show that the linear response fitting of the digital multi-channel energy spectrum measurement system exceeds 99.99%. Under high counting rates, the energy resolution without baseline recovery was 8.83% (@0.662 keV), while the energy resolution with the parallel full-comparison baseline recovery method was 7.57% (@0.662 keV), improving by 0.92%. In conclusion, compared to the system without baseline recovery, the parallel full-comparison baseline recovery method effectively alleviates the baseline drift issue of the NaI detector under high counting rates, thereby improving the energy resolution of the system.

关键词： Spectroscopy Energy resolution Stacking Estimation Energy measurement Linearity Detectors Software Software measurement Signal resolution

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Research on Fire Time of Tree Line Fault Trees under 10kV Distribution Line

Research on Fire Time of Tree Line Fault Trees under 10kV Di...

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Power and Electrical technology Conference (APET), Asia

作者： Sen Yang Tianxiang Chen Meng Wang Chaoxu Zeng Longshan Yang Long Chen The college of Nuclear Technology and Automation Engineering Chengdu University of Technology Cheng Du China

The tree direct contact line is the fault type that has the greatest impact on the power system in the tree-line contradiction. At present, most of the existing studies are aimed at the monitoring and disposal of tree line faults, but there are few studies on the fire time of tree line faults. Based on the 10kV simulated test line, this paper builds a tree line fault simulation test platform for 10 kV distribution lines. The common tree species under the transmission line in Sichuan are selected as test sample trees. The fire time of different types of trees after tree line failure is studied. The test study obtained the fire time of three kinds of trees under the condition of capacitance current of different lines to the ground. It was found that the fire time is not directly related to the tree and impedance. The main factors affecting the fire time are the thickness of the tree and the size of the capacitance current of the transmission line. The process of tree burning can be divided into 4 stages, namely: arc preheating stage, epidermal carbonization stage, water evaporation stage and branch burning stage, and can correspond to the changing trend of leakage current. The research results can provide technical reference for preventing wildfires caused by transmission line tree line faults.

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Study on Inter-Turn Short Circuit Fault of Dry-Type Air-Core Shunt Reactor under Low Voltage with Low Frequency 6

Study on Inter-Turn Short Circuit Fault of Dry-Type Air-Core...

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6th IEEE Conference on Energy Internet and Energy System Integration, EI2 2022

作者： Peng, Yumin Zhang, Man Liu, Ying Jing, Shi Huang, Qi University of Electronic Science and Technology of China School of Mechanical and Electrical Engineering Chengdu China Institute of Electronic and Information Engineering of UESTC in Guangdong School of Mechanical and Electrical Engineering Dongguan China Chengdu University of Technology College of Nuclear Technology and Automation Engineering Chengdu China

ISBN: (纸本)9798350347159

When the inter-turn short circuit fault occurs in the dry-type air-core shunt reactor (DASR), the short circuit loop will consume a large amount of active power, which will cause the equipment temperature to rise in a short time and damage the equipment. Therefore, it is very important to detect the fault in the early stage of the inter-turn short circuit fault. This paper presents a method to detect the number of inter-turn short circuit fault turns of the DASR based on modified active power (Pm) and modified reactive power (Qm), at low voltage with low frequency. The formulas for Pm and Qm are obtained by adding correction factors to the formulas for active power and reactive power respectively. Their correction factors are obtained by using genetic algorithm. The variations of Pm and Qm under normal condition and short circuit condition with different turns are studied. The inter-turn short circuit fault with different frequency and different fault location is simulated. It provides a feasible method for detecting the inter-turn short circuit fault of the DASR and determining the number of short circuit turns. © 2022 IEEE.

关键词： Reactive power

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A Physics and Data-Driven Hybrid PINNs Intelligent Computing Method for nuclear engineering Simulation 4

A Physics and Data-Driven Hybrid PINNs Intelligent Computing...

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4th International Conference on Electronic Information engineering and Computer Science, EIECS 2024

作者： Xie, Yufei Wang, Wenlin Wu, Guohua Yu, Yang An, Ping Sun, Zibin Zhang, Haichuan Luo, Shengfeng Li, Yue School of Automation Wuhan University of Technology Wuhan China Sino-German College of Intelligent Manufacturing Shenzhen Technology University Shenzhen China Nuclear Power Institute of China Chengdu China National University of Defense Technology National Key Laboratory of Parallel and Distributed Computing Changsha China

ISBN: (纸本)9798331531409

In the field of nuclear energy, the Loss of Coolant Accident (LOCA) is recognized as one of the most severe types of nuclear reactor accidents, characterized by its complex physical processes and potentially catastrophic consequences. These challenges impose stringent requirements on safety analysis and emergency response. Accurate prediction and analysis of fluid behavior within pipelines under LOCA conditions are critical for evaluating accident outcomes and formulating response strategies. This paper introduces an innovative intelligent computing approach - a Physics-Informed Neural Networks (PINNs) model driven by both physical data and simulation data, specifically tailored for LOCA conditions. To address the challenges posed by multivariable and complex physical relationships, the six-equation two-fluid model is first simplified to represent the physical processes. Subsequently, a dual-driven PINNs network is developed, integrating both simulation data and physical constraints. The proposed model demonstrates a root mean square error (RMSE) of 0.02, a mean absolute error (MAE) of 0.044, and an R2 of 0.81 in predicting the outcomes under the six-equation model. © 2024 IEEE.

关键词： nuclear energy

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Experimental Study on Impedance Characteristics of Trees under 10kV Voltage

Experimental Study on Impedance Characteristics of Trees und...

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Power and Energy (PandaFPE), Panda Forum on

作者： Sen Yang Shenyuan Zhao Linlin Li Tianxiang Chen The college of Nuclear Technology and Automation Engineering Chengdu University of Technology Cheng Du China

The tree direct contact line is the fault type that has the greatest impact on the power system in the tree-line contradiction. At present, most of the existing studies are aimed at the monitoring and disposal of tree-line faults, but there are few studies on the impedance characteristics of trees when tree- line faults occur. Based on the 10k V simulated test line, this paper experimentally studies the change process, development trend and change characteristics of tree impedance when trees of different types, lengths and moisture contents have tree-line faults, as well as the influence of different system capacitive currents on fault characteristics. The experiment took three different species of pine, eucalyptus and bamboo as the test objects. The results showed that the impedance characteristics of the three different species of trees during tree line contact discharge were different, among which pine and eucalyptus had larger impedance and bamboo had smaller impedance. And the correlation between tree length and tree impedance is not strong. Under the premise of the same tree species, the impedance of the part with high moisture content is small, and the impedance of the part with low moisture content is large. In the time range of 0~ 20s, the impedance of trees decreases with the increase of discharge time.

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