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2024 CSAA/IET International Conference on Aircraft Utility Systems, AUS 2024

作者： Wang, Jin Yan, Liang Gao, Xiaoshan Su, Hang School of Automation Science and Electrical Engineering Beihang University Beijing100191 China Tianmushan Laboratory Hangzhou310023 China Science and Technology on Aircraft Control Laboratory Beihang University Beijing100191 China Ningbo Institute of Technology Beihang University Ningbo315800 China

The multi-phase redundant permanent magnet machine is essentially a permanent magnet synchronous motor (PMSM) with multiple sets of windings arranged on the stator. This configuration facilitates fault-tolerant operation of the PMSM in the event of one or multiple phase windings failing. In response to the practical requirements of electromechanical actuation systems in the aviation industry, this paper proposed a solution for a high-power, high-speed multi-phase redundant permanent magnet machine. The stator and rotor configuration of the multi-phase machine, along with short-circuit current suppression, are analysed, leading to the design of a prototype with specifications of 7.3 kW and 14,000 rpm. The finite element method is employed to simulate the machine's performance under no-load and full-load conditions, as well as its redundancy and thermal characteristics. The simulation results verify the correctness of the design approach well. © The Institution of engineering & Technology 2024.

关键词： Stators

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Improved Auction Algorithm for Weapon Target Assignment with Firepower-Health Model 42

Improved Auction Algorithm for Weapon Target Assignment with...

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42nd Chinese control Conference, CCC 2023

作者： Wang, Shuobo Heng, Yong Hua, Yongzhao Dong, Xiwang Ren, Zhang Institute of Artificial Intelligence Beihang University Beijing100191 China Beijing Institute of Electronic System Engineering Beijing100854 China School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Beijing100191 China

ISBN: (纸本)9789887581543

This paper proposes an improved auction algorithm to optimize the efficiency of dynamic weapon target assignment (WTA) problem. Firstly, the dynamic battlefield environment of firepower-health model is analyzed and the constraints of weapon assignment problem are established. The firepower-health model is about the idea of adding constraints of weapon firepower and target health to promote the result of assignment more effectively. Secondly, in order to improve the computing speed of WTA algorithm, the penalty mechanism is introduced in the compensation auction algorithm. The main idea of improved algorithm is to reduce the extra consuming of the weapon during the assignment, from which penalty mechanism can optimize the assignment results and reduce the number of algorithm iterations by punishing the overkilled target under certain rules. Finally, the simulation results based on the dynamic firepower-health model show that the proposed algorithm can meet the requirements of firepower allocation, and can promote the effectiveness of assignment with high real-time response. © 2023 Technical Committee on control Theory, Chinese Association of automation.

关键词： Dynamics

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Adaptive control Scheme for Clustering of Nodes Based on the Signs of Connections in Dynamical Signed Networks 19th

Adaptive Control Scheme for Clustering of Nodes Based on ...

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19th EAI International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness, QShine 2023

作者： Wang, Qi Wang, Yinhe Gao, Zilin Gao, Peitao Xiong, Jianbin Cen, Jian Gao, Ying School of Automation Guangdong Polytechnic Normal University Guangzhou510665 China School of Automation Guangdong University of Technology Guangzhou510006 China College of Computer Science and Engineering Chongqing Three Gorges University Chongqing404020 China School of Electronics and Information Guangdong Polytechnic Normal University Guangzhou510665 China Guangzhou Intelligent Building Equipment Information Integration and Control Key Laboratory Guangzhou510665 China School of Computer Science and Engineering South China University of Technology Guagnzhou510641 China

ISBN: (纸本)9783031651229

The concept of clustering has garnered significant attention within the field of complex networks. Numerous clustering algorithms have been documented in the extant academic literature. However, most of them consider static signed networks, which are not suitable for dynamical networks. For dynamical signed networks, there is a class of algorithms called cluster dynamics. Nevertheless, they regard the connection to be time-invariant, which is a constraint. In this paper, for a kind of dynamical signed networks with time-varying connections, we discuss the adaptive control scheme for clustering of nodes, such that the network evolves asymptotically into a classifiable network that contains several friends’ groups with clear sign boundaries. In other words, through the careful design of the controller for the nodes and the establishment of coupling relationships between the nodes and their connections, we ensure that the connection of the dynamical signed network can approximate asymptotically the connection of a given classifiable network, as measured by the concept of uniformly ultimately bounded (UUB). Finally, the simulation is used to illustrate the validity of the method proposed in this paper. © ICST Institute for Computer sciences, Social Informatics and Telecommunications engineering 2024.

关键词： Adaptive control Classifiable networks Multi-clustering

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ANALYSIS OF SURFACE-MOUNTED PERMANENT MAGNET SYNCHRONOUS ELECTRIC MACHINE PARAMETERS ON THE OUTPUT TORQUE AND EFFICIENCY

ANALYSIS OF SURFACE-MOUNTED PERMANENT MAGNET SYNCHRONOUS ELE...

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2024 CSAA/IET International Conference on Aircraft Utility Systems, AUS 2024

作者： Su, Hang Yan, Liang Wei, Xiaocheng Wang, Jin Jin, Zijian Dong, Ziwei School of Automation Science and Electrical Engineering Beihang University Beijing100191 China Tianmushan Laboratory Hangzhou310023 China Science and Technology on Aircraft Control Laboratory Beihang University Beijing100191 China Ningbo Institute of Technology Beihang University Ningbo315800 China

Surface-mounted permanent magnet synchronous electric machines play an important role in industrial production. Output torque and efficiency are important indicators of electric machines. The key parameters of electric machines have a great influence on output torque and efficiency. First, this paper gives the conceptual design diagram of the electric machine and derives the governing equations of output torque and efficiency. The electric machine structure parameters are optimized by numerical simulation, and the relationships between the core material, permanent magnet grade and output torque and efficiency are studied. Subsequently, the influence of stator and rotor parameters on output torque and efficiency is researched. The research results show that high-performance cores, high-grade permanent magnets, large tooth width, small slot open width, large magnet thickness and electrical angle, and small magnet reduction can help improve the output torque and efficiency of the motor. © The Institution of engineering & Technology 2024.

关键词： Permanent magnets

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Q-learning-based space target selection for CNS/INS integrated navigation

Q-learning-based space target selection for CNS/INS integrat...

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Chinese control and Decision Conference, CCDC

作者： Dong Wang Jing Yang Kai Xiong School of Automation Science and Electrical Engineering Beihang University Beijing China Science and Technology on Space Intelligent Control Laboratory Beijing Institute of Control Engineering Beijing China

ISBN: (数字)9798350387780

ISBN: (纸本)9798350387797

To solve the problem that intermittent celestial observation will hamper the navigation accuracy of celestial and inertial integrated navigation system (CNS/INS), a Q-learning-based space target selection method is proposed. The visibility situation of space targets is analyzed under given flight mission, which lays the foundation for subsequent pointing optimization. Q-learning algorithm is employed to optimize the sequence of visible space target. The reward function is designed based on the trace of Fisher information matrix and the rotation angle of optical axis which could make a synthetic balance between navigation accuracy and rotation cost. By setting the optimized pointing sequence to CNS/INS integrated navigation system, unintermittent celestial observation can be achieved to guarantee filtering performance with relatively low rotation cost, which has a certain value of practical engineering application. Comparative simulation experiments demonstrate the effectiveness of the proposed method in terms of navigation accuracy and rotation cost.

关键词： Optical filters Accuracy Costs Q-learning Navigation Filtering Space missions

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Event-Triggered Fault Detection and Isolation for Continuous-Time Piecewise Linear Systems

Event-Triggered Fault Detection and Isolation for Continuous...

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Chinese control and Decision Conference, CCDC

作者： Zongzheng Ma Xiao-Lei Wang School of Control Science and Engineering Dalian University of Technology Dalian China School of Mechatronic Engineering and Automation Shanghai University Shanghai China

ISBN: (数字)9798350387780

ISBN: (纸本)9798350387797

In this article, the fault detection and isolation (FDI) problem for continuous-time piecewise linear systems with sensor outage faults is investigated via event-triggered (ET) mechanisms. First, the output space is defined, and the design method of FDI filters is proposed, in which it is necessary to re-divide the regions of the output space in the design of isolation filters after sensor failures. Then, ET mechanisms are designed on the basis of the filters gains, and an ET FDI scheme is constructed. Different from the existing results, the influence of sensor faults on the output space is considered, and the gains of the designed filters in the absence of ET mechanisms are still applicable after the ET mechanisms are introduced, while the ones in the existing results need to be redesigned. Finally, a simulation example is presented to verify the effectiveness of the proposed method.

关键词： Linear systems Filters Fault detection Design methodology Aerospace electronics

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Tracking performance limitations of networked control systems with packet dropouts and logarithmic quantization 41

Tracking performance limitations of networked control system...

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第41届中国控制会议

作者： Jianhao Li Xiaowei Jiang Hao Chen Shaoying Wang Xianhe Zhang School of Automation China University of Geosciences Hubei Key Laboratory of Advanced Control and Intelligent Automation of Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Fujian Provincial Key Laboratory of Intelligent Identification and Control of Complex Dynamic System College of Science Binzhou University School of Electrical Engineering and Automation Hubei Normal University

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

In this paper,we focus on the tracking performance(TP) limitations of networked control systems(NCS s).The control system considered is a multi-input and multi-output(MIMO) discrete-time network control system with time delay,channel noise,packet dropouts,and logarithmic quantization communication *** modeling the channel,we assumed the channel noise to be additive white Gaussian noise(AWGN) and used a binary random process to model packet dropouts and a logarithmic quantizer to model the quantization *** explicit expression of the TP limitations of NCSs utilizing the two-degree-of-freedom(TDOF) controller is then derived using the frequency-domain approach,coprime decomposition,and Youla parameterization *** results show that the essential characteristics of the plant(locations and directions of nonminimum phase zeros and unstable poles) and network constraints(time delay,packet dropouts,quantization,and noise power spectral density) are closely related to the TP limitations.

关键词： Networked control systems tracking performance limitations packet dropouts logarithmic quantization

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Analysis of Underwater Optical Transfer of Radio-Frequency Signal in Turbulence Water Environment 6

Analysis of Underwater Optical Transfer of Radio-Frequency S...

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6th IEEE International Conference on Electronics and Communication engineering, ICECE 2023

作者： Huang, Wantao Chen, Changfeng Hou, Dong Kaili University College of Science Kaili China Southwest China Research Institute of Electronic Equipment Science and Technology on Electronic Information Control Laboratory Chengdu China University of Electronic Science and Technology of China School of Automation Engineering Chengdu China

ISBN: (纸本)9798350328721

Water flow and temperature drift are the main sources of underwater turbulence. In laser based underwater frequency transfer, underwater turbulence will introduce timing fluctuations, leading to deterioration of frequency transfer. In order to reveal the relationship between the timing fluctuation of transferred frequency signal and the drift of velocity and temperature, this paper establishes a mathematical model to analyze the timing fluctuation caused by water flow and temperature under different gradients. To validate our model, we transmitted a 100 MHz RF signal on a 3.5-meter underwater transmission link, with different artificial flow velocity and temperature drift set during the transmission process. The measured timing fluctuations are consistent with our analysis. The experimental results show that within 5000s, the root mean square (RMS) timing fluctuations of RF signals with velocity gradient, temperature gradient, and no gradient are approximately 37 ps, 123 ps, and 23 ps, respectively. This indicates that the timing fluctuation caused by temperature gradient is higher than that caused by velocity gradient. © 2023 IEEE.

关键词： Flow velocity

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A CVAE Combined With Diffusion Mechanism to Pedestrian Trajectory Prediction

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IEEE Robotics and automation Letters 2025年第7期10卷 7358-7364页

作者： Hu, Chuan Lang, Peichuan Chen, Hao Yang, Biao Zhu, Dianchen Shanghai Jiao Tong University School of Mechanical Engineering Shanghai200240 China University of Shanghai for Science and Technology School of Mechanical Engineering Automation Department Shanghai200093 China Changzhou University School of Microelectronics and Control Engineering Changzhou213000 China Hefei University of Technology School of Automotive and Transportation Engineering Automation Department Hefei230009 China

Pedestrian trajectory prediction has always been a key issue in engineering fields such as autonomous driving. Diffusion model can be used to solve the problem of multimodal pedestrian trajectory generation, but the excessive denoising steps in the model result in slow inference speed for this type of method. To address these issues, we propose a multimodal trajectory generation model, which is a CVAE framework combined with diffusion mechanisms. This model utilizes the denoising process in the diffusion model to optimize the trajectory output by CVAE, thereby achieving higher accuracy. Meanwhile, the initial trajectory output by CVAE can significantly reduce the denoising steps in the model, thereby reducing inference time. Conducted experiments on ETH and UCY datasets, and ADE and FDE results showed that our method achieved better performance compared to previous methods. Meanwhile, our method also demonstrated better test results on the NBA dataset. © 2016 IEEE.

关键词： Autonomous vehicles

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Fixed-Time Cooperative Tracking for Delayed Disturbed Multi-Agent Systems Under Dynamic Event-Triggered control

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IEEE/CAA Journal of Automatica Sinica 2022年第5期9卷 930-933页

作者： Jian Liu Yongbao Wu Mengwei Sun Changyin Sun School of Automation Southeast UniversityNanjing 210096 Key Laboratory of Measurement and Control of Complex System of Engineering Ministry of EducationSoutheast UniversityNanjing 210096China Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601China IEEE

Dear editor,Recently,researchers have obtained many new results about the multi-agent systems(MASs)[1]-[3].In[1],the fixed-time cooperative control(FTCC)algorithm of linear MASs with matched disturbances was *** nonholonomic chained-form dynamics case was considered in[2].In[3],the output tracking problem with data packet dropout was solved for high-order ***,delay frequently occurs because of the non-ideal data transmission[4],and the corresponding FTCC algorithm of MASs with delay was given in[5].

关键词： editor Dynamic Trigger Event

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