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Chinese control and Decision Conference, CCDC

作者： Zhiqiang Wang Xiuyun Zhang Lin He Tao Liu School of Automobile and Transportation Tianjin University of Technology and Education Tianjin Key Laboratory of Information Sensing and Intelligent Control Tianjin University of Technology and Education Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and Energy Tiangong University Tianjin

ISBN: (数字)9781728158556

ISBN: (纸本)9781728158563

In order to accelerate the contour tracking performance of the biaxial feed drive system, a model predictive contouring control (MPCC) strategy is proposed in this paper. First, the Internal Model Principle with robust tracking is combined to track a desired trajectory in the modeling. The un-modeled nonlinear friction and slowly varying uncertainties are compensated. After that, a unified model of the biaxial feed drive system based on state space is established. Then, a model predictive contouring controller is designed, and the tracking error, the contour error and the control increment are introduced into the cost function to realize the collaborative optimization control of the multiple variables. Finally, according to the actual demand, a posteriori constraint limitation network is established. The experimental results show that the control strategy in this paper can improve the dynamic contour tracking performance, especially in the case of large turning, and the contour error can be reduced.

关键词： Feeds Predictive models Trajectory Friction Cost function Drives Optimal control

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Traffic Operation Status Research Based on Multi-source Data Fusion 6th

Traffic Operation Status Research Based on Multi-source Data...

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6th International Conference on Electrical Engineering and Information Technologies for Rail transportation, EITRT 2023

作者： Cao, Ling Wang, Pangwei Dong, Honghui School of Traffic and Transportation Beijing Research Center of Urban Traffic Information Intelligent Sensing and Service Technologies Beijing Jiaotong University Beijing100044 China State Key Laboratory of Advanced Rail Autonomous Operation Beijing Jiaotong University Beijing100044 China School of Electrical and Control Engineering North China University of Technology Beijing100144 China

ISBN: (纸本)9789819993185

At present, modern technologies such as big data, cloud computing and vehicle-road collaboration are developing rapidly, and the existing traffic detection data based on a single detector cannot meet the demand for high-precision data in the vehicle-road cloud environment. Facing the massive, heterogeneous and complex traffic data, this paper selects the data collected by LiDAR, HD camera and V2X communication unit as the data sources for this research, establishing the multi-source traffic data fusion model with wavelet neural network and genetic algorithm optimized BP neural network respectively, and builds the traffic status classification model based on fuzzy C-mean clustering algorithm. The fusion model and the traffic status classification model are verified for the single intersection road section in the vehicle-road cloud cooperative environment. The results show that the fusion accuracy of genetic algorithm optimized BP neural network reaches 93% and the status classification model has high feasibility, which can provide data support for intersection signal control and traffic guidance optimization. © 2024, Beijing Paike Culture Commu. Co., Ltd.

关键词： Data fusion

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Chlorine-Substituent Regulation in Dopant-Free Small-Molecule Hole-Transport materials Improves the Effi ciency and Stability of Inverted Perovskite Solar Cells

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Transactions of Tianjin University 2024年第4期30卷 314-323页

作者： Xinyi Liu Xiaoye Zhang Zhanfeng Li Jinbo Chen Yanting Tian Baoyou Liu Changfeng Si Gang Yue Hua Dong Zhaoxin Wu Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceTaiyuan University of TechnologyTaiyuan 030024China School of Electrical Engineering University of South ChinaHengyang 421001China College of Physics and Optoelectronics Taiyuan University of TechnologyTaiyuan 030024China Ningxia Hui Autonomous Region Screen Display Organic Materials Engineering Technology Research Center Ningxia Sinostar Display Material Co.Ltd.Yinchuan 750003China Organic Semiconductor Centre EaStCHEM School of ChemistryUniversity of St AndrewsFife KY169STUK Key Laboratory of Photonics Technology for Information School of Electronic and Information Engineering Xi’an Jiaotong UniversityXi’an 710049China

Although doped hole-transport materials(HTMs)off er an effi ciency benefi t for perovskite solar cells(PSCs),they inevi-tably diminish the ***,we describe the use of various chlorinated small molecules,specifi cally fl uorenone-triphenylamine(FO-TPA)-x-Cl[x=para,meta,and ortho(p,m,and o)],with diff erent chlorine-substituent positions,as dopant-free HTMs for *** chlorinated molecules feature a symmetrical donor-acceptor-donor structure and ideal intramolecular charge transfer properties,allowing for self-doping and the establishment of built-in potentials for improving charge *** effi cient hole-transfer interfaces are constructed between perovskites and these HTMs by strategi-cally modifying the chlorine ***,the chlorinated HTM-derived inverted PSCs exhibited superior effi ciencies and air ***,the dopant-free HTM FO-TPA-o-Cl not only attains a power conversion effi ciency of 20.82% but also demonstrates exceptional stability,retaining 93.8%of its initial effi ciency even after a 30-day aging test conducted under ambient air conditions in PSCs without *** fi ndings underscore the critical role of chlorine-substituent regulation in HTMs in ensuring the formation and maintenance of effi cient and stable PSCs.

关键词： Hole-transport materials Inverted perovskite solar cells Chlorinated small molecules Donor–acceptor–donor structure

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Interference Fading Suppression for Multi-frequency Φ-OTDR

Interference Fading Suppression for Multi-frequency Φ-OTDR

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Optoelectronics Global Conference (OGC)

作者： Yu Wang Junhong Wang Bin Liang Yan Li Qing Bai Baoquan Jin Shanxi Transportation Technology Research & Development Co. Ltd Taiyuan China Key Laboratory of Advanced Transducers and Intelligent Control Systems (Ministry of Education and Shanxi Province) Taiyuan University of Technology Taiyuan China

ISBN: (纸本)9781665486996

In phase-sensitive optical time domain reflectometer (Φ-OTDR), due to interference fading, the intensity of Rayleigh backward scattering (RBS) signals may be close to zero at the fading position and submerged in noise, resulting in the abnormal demodulated phase of vibration signal. In this paper, a multi-frequency Φ-OTDR is proposed for the interference fading suppression. Three acousto-optical modulators (AOMs) are used to generate multi-frequency probe pulses. Data alignment processing is carried to ensure the consistency of multi-frequency beat signals. Rotated-vector-sum method is adopted to aggregate multi-frequency signals. Experimental results show that with the help of data alignment processing, the fading probability of aligned curve can be reduced to 1.90%, and the SNR of positioning curve can reach 16.03dB.

关键词： Vibrations Optical fibers Scattering Interference Rayleigh channels Optical scattering Optical reflection

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BOTDR Denoising by Sparse Representation Algorithm with Preformed Dictionary

BOTDR Denoising by Sparse Representation Algorithm with Pref...

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Optoelectronics Global Conference (OGC)

作者： Yuting Liu Zhijie Sun Ning Cui Qing Bai Yu Wang Baoquan Jin Key Laboratory of Advanced Transducers and Intelligent Control Systems Ministry of Education and Shanxi Province Taiyuan University of Technology Taiyuan China Shanxi Transportation Technology Research & Development Co. Ltd Taiyuan China

ISBN: (纸本)9781665486996

In Brillouin optical time domain reflectometers, the signal-to-noise ratio is a key factor restricting the sensor performance. Using redundancy and correlation of 3DBrillouin gain spectrum in multi-dimensional domain, sparse representation algorithm can be used to improve signal-to-noise ratio. According to basic principle of sparse representation, a dictionary can be designed to reconstruct valid signals. During reconstruction, random noise will be discarded as residuals. In this paper, discrete cosine transform algorithm is used to design the dictionary, orthogonal matching pursuit algorithm is used to extract the coefficient matrix, and the signal is finally reconstructed to achieve the purpose of noise reduction. The simulation results show that when 5dBm random noise is added, signal-to-noise ratio in the non-temperature-change region is increased by 24.3dB, which provides a new idea for improving signal-to-noise ratio of BOTDR sensor.

关键词： Dictionaries Noise reduction Matching pursuit algorithms Transforms Data models Sparse matrices Discrete cosine transforms

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Mechanical Analysis and Performance Optimization for the Lunar Rover’s Vane-Telescopic Walking Wheel

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Engineering 2020年第8期6卷 936-943页

作者： Lu Yang Bowen Cai Ronghui Zhang Kening Li Zixian Zhang Jiehao Lei Baichao Chen Rongben Wang Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical EngineeringTianjin University of TechnologyTianjin 300384China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of TechnologyTianjin 300384China Guangdong Key Laboratory of Intelligent Transportation System School of Intelligent Systems EngineeringSun Yat-sen UniversityGuangzhou 510275China College of Transportation Jilin UniversityChangchun 130025China Department of Mechanical Science and Engineering Tokyo Institute of TechnologyTokyo 152-8550Japan Armour College of Engineering Illinois Institute of TechnologyChicagoIL 60616USA China Academy of Space Technology Beijing 100029China

It is well-known that optimizing the wheel system of lunar rovers is ***,this is a difficult task due to the complex terrain of the moon and limited resources onboard lunar *** this study,an experimental prototype was set up to analyze the existing mechanical design of a lunar rover and improve its ***,a new vane-telescopic walking wheel was proposed for the lunar rover with a positive and negative quadrangle suspension,considering the complex terrain of the ***,the performance was optimized under the limitations of preserving the slope passage and minimizing power *** was achieved via analysis of the wheel force during ***,the effectiveness of the proposed method was demonstrated by several simulation *** newly designed wheel can protrude on demand and reduce energy consumption;it can be used as a reference for lunar rover development engineering in China.

关键词： intelligent vehicle Vane-telescopic walking wheel Performance optimization Vane spring Lunar rover

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A Survey on Deep Reinforcement Learning for Traffic Signal control

A Survey on Deep Reinforcement Learning for Traffic Signal C...

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第33届中国控制与决策会议

作者： Wei Miao Long Li Zhiwen Wang GS-Unis Intelligent Transportation System&Control Technology Co .Ltd College of Electrical and Information Engineering Lanzhou University of Technology Key Laboratory of Gansu Advanced Control for Industrial Processes Lanzhou University of Technology National Demonstration Center for Experimental Electrical and Control Engineering Education Lanzhou University of Technology

Traffic congestion is one of the most important and complex problems in urban governance for a long *** traffic lights are used at intersections,traffic bottlenecks still appear with the increasing number of private *** recent years,with the continuous development of related technologies in the field of intelligent transportation,more attention has been paid to the automatic driving scheme with intelligent vehicle infrastructure cooperative systems as the *** a kind of advanced artificial intelligence method,deep reinforcement learning(DRL) is applied to traffic signal control(TSC) to achieve the purpose of optimizing roadside traffic *** this paper,we introduce the background of TSC(i.e.,main parameters,methods and simulation tools),and then summarize the representation of DRL model(i.e.,state,action and reward) and the application of DRL in *** research scenarios of TSC are divided into single-agent and ***,according to existing works in this field,the problems to be solved are put forward and the paper is summarized.

关键词： Deep reinforcement learning Traffic signal control Multi-agent Intersection

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Event-triggered model predictive control for cyber-physical system under false data injection attacks

Event-triggered model predictive control for cyber-physical ...

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第33届中国过程控制会议

作者： Bin Zhang Zhiwen Wang Yanrong Lu Long Li College of Electrical and Information Engineering Lanzhou University of Technology Key Laboratory of Gansu Advanced Control for Industrial Processes Lanzhou University of Technology National Demonstration Center for Experimental Electrical and Control Engineering Education Lanzhou University of Technology GS-Unis Intelligent Transportation System&Control Technology Co. Ltd.

In this paper,an event-triggered model predictive control strategy is proposed for cyber-physical systems under the perception of false data injection *** on attack perception,two different event-triggered mechanisms are designed for the sensor-to-controller channel and the controller-to-actuator *** the sensor-to-controller channel,the event-triggered strategy 1 effectively reduces the network bandwidth pressure caused by the sensor *** the controller-actuator channel,the event-triggered model predictive control strategy effectively compensates for the adverse effects of signal data loss or unavailability of signal data caused by spurious data injection ***,the simulation of the networked first-order inverted pendulum model shows the effectiveness of the proposed methods.

关键词： Cyber-physical systems False data injection attacks Event-triggered mechanism Model predictive control

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Pressure-assisted Silver Sintering Structure Optimization for Power Modules 5

Pressure-assisted Silver Sintering Structure Optimization fo...

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5th International Conference on Optoelectronic Science and materials, ICOSM 2023

作者： Zhang, Hao Xing, Yulong Gao, Lilan Liu, Zheng Tan, Yansong Lu, Guoquan Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control Tianjin University of Technology Tianjin300384 China National Demonstration Center or Experimental Mechanical and Electrical Engineering Education Tianjin University of Technology Tianjin300384 China Tianjin Yixunyuan New Material Technology Co. Ltd. Tianjin300380 China School of Chemical Engineering Tianjin University Tianjin300350 China School of Materials Science and Engineering Virginia Polytechnic Institute and State University BlacksburgVA24061 United States

ISBN: (纸本)9781510674547

As mobile technology evolves from 5G to 6G, the demand for third-generation semiconductors such as SiC with higher power and frequency capabilities is increasing. Silicon Carbide power modules generate significant heat during operation, requiring large-area nano-silver sintering technology to improve module performance and reliability. However, in large-area sintering processes, low exhaust efficiency of solder paste by-products and uneven sintering pressure of the nano-silver paste result in poor sintering quality of the silver layer. This study aims to improve the sintering quality of interconnected silver layers by optimizing the sintering pressure distribution and adding rubber spacers to the sintering structure. ABAQUS was used to quantitatively analyze the effects of pressure methods and gasket material, diameter, and thickness on the stress distribution in the silver layer. Finally, based on the simulation results, an optimized sintering structure was proposed to unify the pressure and reduce the stress concentration in the silver layer, and verified experimentally by sintering tests. Compared with the traditional sintering structure, the application of a 2 mm thick fluoro rubber gasket with the same surface area as the silver layer in the optimized structure reduced the porosity to 2.15% and achieved a more dense sintered silver layer. © 2024 SPIE.

关键词： Finite element method

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Coordinated Optimization Method of Dual Head Gasoline Blending Under Strict Constraint Conditions

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Shiyou Xuebao, Shiyou Jiagong/Acta Petrolei Sinica (Petroleum Processing Section) 2019年第2期35卷 337-347页

作者： He, Renchu Chen, Haiquan Zhang, Weidong Zhu, Wenqi Key Laboratory of Advanced Control and Optimization Technology for Chemical Processes Ministry of Education East China University of Science and Technology Shanghai200237 China Shanghai Key Laboratory of Intelligent Manufacturing and Robotics Shanghai University Shanghai200072 China Information and Measurement Center Jinling Company SINOPEC Nanjing210033 China Storage and Transportation Department Zhenhai Refining&Chemical Company SINOPEC Ningbo315207 China

For the upcoming China Ⅵ gasoline standard with much more strictly controlled properties, and high requirements for blending efficiency, a blending process and coordinated optimization algorithm for blending multiple brands of gasoline at the same time were developed. Octane number model, vapor pressure model, density model, distillation range model and content attribute model were established. The calculation process of octane number model and distillation range model have been improved, and 12 quality indicators of gasoline can be precisely monitored during the blending process. Considering the actual accumulative blending process, the properties of gasoline in the tank during the blending process should be converted into instantaneous properties zone at the blending head. The optimized properties of the blending head are used to compensate the properties deviation of the amount of blending and the tank bottom oil. Meanwhile, a reasonable and efficient coordination optimization algorithm is used to coordinate the upper limit of the common component oil, which solves the problem of scramble for the common component oil flow in the double blending head in the blending process. The simulation results show that the design method can be applied to the gasoline blending of double head in the field, and can also provide technical support for the upgrading of gasoline blending process under the China Ⅵ gasoline standard. © 2019, Editorial Office of Acta Petrolei Sinica(Petroleum Processing Section). All right reserved.

关键词： Gasoline

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