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2022 Chinese Automation Congress, CAC 2022

作者： Pan, Fei Jiang, Zehua Zhang, Shuyang Zhu, Zihan Hua, Gengpai Shanghai Key Laboratory of Aerospace Intelligent Control Technology Shanghai Aerospace Control Technology Institute Shanghai China

ISBN: (纸本)9781665465335

A control force allocation algorithm suitable for MEMS micro-thruster array is proposed. Firstly, according to the characteristics of MEMS micro-thruster array, the thrust model is established. Secondly, a tabular matrix generation method is proposed. Finally, a control force allocation algorithm based on look-up table matrix is designed for attitude-orbit coupling control. The tracking control of the flying asteroid is taken as the simulation background, and the adaptive terminal sliding mode control is taken as the control rate. The simulation example shows the effectiveness of the control force allocation algorithm. The results show that the allocation algorithm can well realize the force and torque calculated by the control rate, and the attitude and orbit can converge quickly. © 2022 IEEE.

关键词： Orbits

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Recent achievements in selenium-based transition metal electrocatalysts for pH-universal water splitting

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Nano Research 2024年第7期17卷 5763-5785页

作者： Yuwei Jiang Sanshuang Gao Xijun Liu Yin Wang Shuxing Zhou Qian Liu Abdukader Abdukayum Guangzhi Hu Xinjiang Key Laboratory of Novel Functional Materials Chemistry College of Chemistry and Environmental SciencesKashi UniversityKashi 844000China Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental ScienceYunnan UniversityKunming 650504China MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004China Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and ScienceXiangyang 441053China Institute for Advanced Study Chengdu UniversityChengdu 610106China

The electrolysis of water to produce hydrogen is an important technique to replace traditional fossil fuel-based hydrogen *** method efficiently converts electrical energy into chemical energy,it is ostensibly a promising candidate for addressing the energy *** effort has been devoted to developing efficient electrocatalysts for water *** exploration of suitable catalytic materials for the hydrogen evolution reaction(HER),oxygen evolution reaction(OER),and other bifunctional electrocatalytic reactions is *** metal selenides(TMSes)have emerged as potential HER and OER electrocatalysts because of their unique electronic structures,which are beneficial for charge transfer,tuneable bandgaps,distinctive morphologies,and *** review discusses the mechanisms and performance comparisons of TMSes in overall water splitting under various pH *** an industrial and commercial perspective,the catalytic performance of TMSes for the HER and OER is not *** for preparing electrocatalytic materials and optimizing materials for overall water decomposition and modulation mechanisms have been introduced to improve electrocatalytic performance,such as element doping,carbon composites,bimetallic systems,morphology control,and heterogeneous interface ***,the challenges and prospects of TMSes were discussed.

关键词： hydrogen energy source electrocatalysis water splitting selenium-based materials transition metal

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Research on Adaptive Fault-Tolerant control of Quadrotor UAV Based on Improved Nonlinear Extended State Observer 13

Research on Adaptive Fault-Tolerant Control of Quadrotor UAV...

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13th International Conference on Information Science and technology, ICIST 2023

作者： Cai, Zongshan Sun, Kaibiao Key Laboratory of Intelligent Control and Optimization for Industrial Equipment Ministry of Education Dalian University of Technology China School of Control Science and Engineering Dalian University of Technology Dalian China

ISBN: (纸本)9798350313925

In this paper, a parameter-uncertain quadrotor UAV system with unknown external disturbances and actuator failures is studied, and a parameter adaptive fault-tolerant control scheme is based on an improved nonlinear extended state Man-machine trajectory tracking control. First, considering the influence of the unknown multi-source external environmental disturbance on the quadrotor UAV, the external disturbance suffered by the system is estimated and compensated in real-time by introducing an improved nonlinear extended state observer. Secondly, a new type of sliding mode reaching law is designed by using the continuous function with relay characteristics combined with the exponential function, which improves the sliding mode response speed of the system and eliminates the chattering of the sliding mode. Finally, a parameter adaptive law is designed for the actuator fault, and an adaptive fault-tolerant controller is designed by combining the backstepping sliding mode method, and the stability of the control system is proved by using the Lyapunov stability theory. © 2023 IEEE.

关键词： Unmanned aerial vehicles (UAV)

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Based on Hybrid Densenet-121 with Support Vector Machine Algorithm for Lettuce and Chili 20

Based on Hybrid Densenet-121 with Support Vector Machine Alg...

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20th IEEE International Conference on Mechatronics and Automation, ICMA 2023

作者： He, Yuzhe Wu, Yanjuan Wang, Caiwei Tianjin University of Technology Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin Key Laboratory of New Energy Power Conversion Transmission and Intelligent Control Binshui Xidao 391 Tianjin China

ISBN: (纸本)9798350320831

In this paper, to improve the recognition accuracy of Densenet-121, we combine Densenet-121 with SVM to generate a new network Densenet-121-SVM. In this paper, the two datasets are combined to generate a new dataset named Mixed-dataset, which has four plants, namely: Lettuce, Chili, Chinee apple, and Lantana, and this dataset is used to train the network. Finally, the recognition accuracies of SVM, Densenet121 and Densenet-121-SVM are 84.144%, 96.211% and 98.181%, respectively, and it can be seen that the accuracy of Densenet-121-SVM is improved by 14% and 1.97% compared to SVM and Densenet-121, respectively. © 2023 IEEE.

关键词： Lettuce

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Multi-Channel Based on Attention Network for Infrared Small Target Detection

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Journal of Shanghai Jiaotong university(Science) 2024年第3期29卷 414-427页

作者：张彦军王碧云蔡云泽 Department of Automation Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Institute of Aerospace Control Technology Shanghai 201109China Infrared Detection Technology R&D Center of China Aerospace Science and Technology Corporation Shanghai 201109China Key Laboratory of System Control and Information Processing Ministry of Education of ChinaShanghai 200240China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai 200240China Key Laboratory of Marine Intelligent Equipment and System of Ministry of Education Shanghai Jiao Tong UniversityShanghai 200240China Institute of Marine Equipment Shanghai Jiao Tong UniversityShanghai 200240China

Infrared detection technology has the advantages of all-weather detection and good concealment,which is widely used in long-distance target detection and tracking ***,the complex background,the strong noise,and the characteristics of small scale and weak intensity of targets bring great difficulties to the detection of infrared small targets.A multi-channel based on attention network is proposed in this paper,aimed at the problem of high missed detection rate and false alarm rate of traditional algorithms and the problem of large model,high complexity and poor detection performance of deep learning ***,given the difficulty in extracting the features of infrared multiscale and small dim targets,the multiple channels are designed based on dilated convolution to capture multiscale target ***,the coordinate attention block is incorporated in each channel to suppress background clutters adaptively and enhance target *** addition,the fusion of shallow detail features and deep abstract semantic features is realized by synthesizing the contextual attention fusion ***,it is verified that,compared with other state-of-the-art methods based on the datasets SIRST and MDFA,the proposed algorithm further improves the detection effect,and the model size and computational complexity are smaller.

关键词： infrared image small target detection deep learning attention mechanism feature fusion

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Linear active disturbance rejection control of phase-shifted full-bridge converter based on improved particle swarm optimization algorithm 20

Linear active disturbance rejection control of phase-shifted...

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20th IEEE International Conference on Mechatronics and Automation, ICMA 2023

作者： Wang, HongSen Wu, YanJuan Tianjin University of Technology Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin Key Laboratory of New Energy Power Conversion Transmission and Intelligent Control Binshui Xidao 391 Tianjin China

ISBN: (纸本)9798350320831

In order to improve the dynamic performance and disturbance suppression ability of conventional PID control phase shift full-bridge converter, LADRC based on improved particle swarm optimization is proposed. The voltage loop transfer function of phase-shifted full-bridge converter is derived based on the state space average method. Secondly, LESO and LSEF are designed to estimate and compensate the external disturbance and internal uncertainty in real time. Finally, the advantages of linear active disturbance rejection controller are verified by simulation experiments. The experimental results show that the controller has better disturbance suppression performance and dynamic performance than the traditional PID controller. © 2023 IEEE.

关键词： controllers

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Uncertainty Treatment of Integrated Energy System Based on Scenario Reduction Method 20

Uncertainty Treatment of Integrated Energy System Based on S...

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20th IEEE International Conference on Mechatronics and Automation, ICMA 2023

作者： Wang, Caiwei Wu, Yanjuan Cong, Peizhi He, Yuzhe Tianjin University of Technology Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin Key Laboratory of New Energy Power Conversion Transmission and Intelligent Control Binshui Xidao 391 Tianjin China

ISBN: (纸本)9798350320831

In the context of high permeability of renewable energy, a large number of uncertain energy sources, such as scenery, have brought a huge impact on the security and stability of the comprehensive energy system. In order to reduce the impact of renewable energy on the new power system and improve the system stability, In this paper, a comprehensive energy system of the park is set up, which consists of three kinds of energy loads including source side electricity, heat, gas and scenery, and electric heat. On this basis, Monte Carlo method is adopted to simulate multiple sets of scenes respectively for the scenery output. On this basis, scene reduction method is adopted to reduce them to obtain the final equivalent force diagram, so as to reduce the influence of the uncertainty of scenery on the system stability. Finally, the effectiveness of the proposed method is verified by simulation analysis. © 2023 IEEE.

关键词： Monte Carlo methods

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Real-time scheduling strategy for electric vehicles based on sliding window transmission optimization 20

Real-time scheduling strategy for electric vehicles based on...

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20th IEEE International Conference on Mechatronics and Automation, ICMA 2023

作者： Cong, Peizhi Wu, Yanjuan Wang, Caiwei Tianjin University of Technology Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin Key Laboratory of New Energy Power Conversion Transmission and Intelligent Control Binshui Xidao 391 Tianjin China

ISBN: (纸本)9798350320831

In order to reduce the impact of electric vehicle(EV) charging load on the power grid, a real-time optimal scheduling scheme for charging and discharging Evs is proposed. Firstly, the objective is to reduce charging costs and network loss costs, aiming to minimize the total cost of EVs at the current time. An EV dispatching model is established, the grid node acceptance capacity performance is analyzed by constructing a network loss sensitivity index, and the EV charging and discharging strategy is obtained in real time based on the time-of-use tariff of the grid load by means of a tide calculation and a sliding window variable speed optimization algorithm as well as a second-order convex optimization calculation method. Finally, the proposed strategy is verified to be effective in reducing the charging cost and network loss cost, and has good real-time flexible dispatching performance, using an improved IEEE 39-node distribution network as an example. © 2023 IEEE.

关键词： Electric vehicles

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An asymmetrically substituted dithieno[3,2-b:2',3'-d]pyrrole organic small-molecule hole-transporting material for high-performance perovskite solar cells

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Chinese Journal of Chemical Engineering 2022年第5期35卷 51-57页

作者： Jingwen Jia Yue Zhang Liangsheng Duan Quanping Wu Yu Chen Song Xue Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical EngineeringTianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion Department of Applied ChemistryTianjin University of TechnologyTianjin 300384China

Hole-transporting materials play a vital role in terms of the performance of perovskite solar cells(PSCs).The dithieno[3,2-b:2’,3’-d]pyrrole(DTP),an S,N-heterocyclic building block,has been proved to be desirable for molecular design of hole-transporting materials in *** developed an asymmetrically substituted DTP small-molecule(JW12)and a reference compound(JW11).The asymmetrical structure of JW12 leads to different absorption properties and electron *** device in a planar n-i-p architecture using JW12 shows a much higher PCE(18.07%)than that based on JW11(15.46%),which is also better than the device based on spiro-OMe TAD(17.47%).We hope our research can provide a new perspective in molecular design of organic HTMs for perovskite solar cells.

关键词： Hole-transporting materials DTP Perovskite Photovoltaic performance

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Development Status of M5 Servo Electric Propulsion System for Precision control of SAR Satellites 3

Development Status of M5 Servo Electric Propulsion System fo...

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3rd China International SAR Symposium, CISS 2022

作者： Yu, Xuewen Huang, Wenbin Han, Luofeng Lu, Chao Liu, Tong Zhu, Kangwu Shanghai Aerospace Control Technology Institute Shanghai Key Laboratory of Aerospace Intelligent Control Technology Shanghai China

ISBN: (数字)9798350398717

ISBN: (纸本)9798350398717

According to the requirements of small SAR satellites for high-precision control, low-power consumption and long lifetime propulsion system, a new 200W class electric propulsion system using a gridded ion thruster based on microwave electron cyclotron resonance (ECR) principle is under development. The design status of all four generations of M5 thrusters and the latest test results are described. The M5 thruster has multi-ECR zones which mean larger discharge area, and an immersed microwave antenna which can feed the microwave power to ECR zones directly, resulting in higher discharge efficiency. The test results show that when working at nominal condition with 0.8sccm xenon gas flow rate and 35W input microwave power, the thruster can achieve 3mN thrust and 2500s specific impulse, while the discharge loss is 600W/A. The composition of the M5 servo electric propulsion system is introduced, and its work performances are listed. The M5 servo electric propulsion system can work in a wide range with a predicted lifetime over 20000 hours, providing high total impulse with low system weight, and has many advantages including high specific impulse, high precision, fast ignition, easy operation, and high reliability. The M5 servo electric propulsion system has good application prospects for small SAR satellites and other small satellites and microsatellites. © 2022 IEEE.

关键词： Satellites

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