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International Conference on Guidance, Navigation and control, ICGNC 2022

作者： Cheng, Ming Tian, Yu Liu, Hao Li, Jianqi School of Astronautics Beihang University Beijing100191 China Beijing Institute of Electronic System Engineering Beijing100854 China Institute of Artificial Intelligence Beihang University Beijing100191 China Hunan Provincial Key Laboratory for Control Technology of Distributed Electric Propulsion Aircraft Changde415000 China

ISBN: (纸本)9789811966125

This paper centers on addressing the fully distributed formation control (FDFC) problem for multiple micro quadrotors to practically perform time-varying formation trajectory tracking flight. The quadrotor model is considered as a nonlinear underactuated system, being influenced by the effects of couplings, parameter variations and environmental uncertainties. A fully distributed formation control law is designed, with local information of the networked quadrotor system. Experimental results for a micro quadrotor team validates the stability and superiority of the proposed control law. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Robust control

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Aerodynamic and aeroacoustic impact of the axial distance upon contra-rotating rotors during hovering condition

Aerodynamic and aeroacoustic impact of the axial distance up...

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AIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2023

作者： Li, Pengyu Yang, Yannian Zhang, Haoyu Liu, Yu Li, Qingxi Noack, Prof. Bernd Department of Mechanics and Aerospace Engineering Southern University of Science and Technology Shenzhen Key Laboratory of Complex Aerospace Flows Guangdong Shenzhen518055 China Key Laboratory of Autonomous Systems and Networked Control Ministry of Education Unmanned Aerial Vehicle Systems Engineering Technology Research Center of Guangdong School of Automation Science and Engineering South Guangdong510640 China Department of Mechanics and Aerospace Engineering Southern University of Science and Technology Shenzhen Key Laboratory of Complex Aerospace Flows Guangdong Shenzhen518055 China AVIC General Aircraft Research Institute Zhuhai Shenzhen Key Laboratory of Complex Aerospace Flows Guangdong519040 China School of Mechanical Engineering and Automation Harbin Institute of Technology Guangdong Shenzhen518055 China

ISBN: (数字)9781624107047

ISBN: (纸本)9781624107047

Contra-rotating rotors have the advantage of compactness and redundancy, which can be observed in many unmanned aerial vehicles. One significant installation parameter for the contra-rotating rotors is the axial distance between the upper and lower rotors, which influences both the time-averaged and unsteady loading of the rotors, as well as the aeroacoustic noise emission. Through experimental methods, each rotor is mounted to a six-component balance to study the impact of the axial distance on the two rotors, and an microphone arc-array is used to study the noise emission and directivity in an anechoic chamber. Two rotors are set at the same rotational speed for all axial distance settings. The results indicate that the increase of axial distance is advantageous for the aerodynamic performance increase and noise reduction, especially in the axial range of 0.1 diameter. The recovery of aerodynamic performance is due to the fully developed slipstream which reduces the mutual influence between the two rotors. The noise reduction is mainly due to the reduced velocity fluctuation alleviates the inter actiontonal noise, although the broadband noise becomes larger as the axial distance increases. © 2023, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Noise abatement

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controlled Growth of Two-Dimensional Heterostructures:In-Plane Epitaxy or Vertical Stack

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Accounts of Materials Research 2022年第10期3卷 999-1010页

作者： Jieyuan Liang Xiaoli Zhu Mingxing Chen Xidong Duan Dong Li Anlian Pan Hunan Institute of Optoelectronic Integration and Key Laboratory for MicroNano Physics and Technology of Hunan Province School of Physics and ElectronicsHunan UniversityChangsha 410082P.R.China Hunan Institute of Optoelectronic Integration and Key Laboratory for MicroNano Physics and Technology of Hunan Province State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Materials Science and EngineeringHunan UniversityChangsha 410082P.R.China Key Laboratory for Matter Microstructure and Function of Hunan Province Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of EducationSchool of Physics and ElectronicsHunan Normal University410081 ChangshaPeople’s Republic of China Hunan Key Laboratory of Two-Dimensional Materials State Key Laboratory for Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical Engineeringthe College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082P.R.China

CONSPECTUS:Two-dimensional(2D)heterostructures have created many novel properties and triggered a variety of promising applications,thus setting off a boom in the modern semiconductor *** the first road to step into adequately exploring the properties and real applications,the material preparation process matters a *** to the concept of epitaxial growth,chemical vapor deposition(CVD)shows great potential for the preparation of heterostructures for commercialization.

关键词： Epitaxy heterostructure Vertical

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Lightweight defect detection method of punched nickel-plated steel strip based on GhostNet

Lightweight defect detection method of punched nickel-plated...

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Pattern Recognition, Machine Vision and Intelligent Algorithms (PRMVIA), International Conference on

作者： Jianqi Li Yincong Liang Rui Du Jingying Wan Binfang Cao Huiting Liu Hunan Provincial Key Laboratory for Control Technology of Distributed Electric Propulsion Aircraft Hunan University of Arts and Sciences Changde China Hunan Provincial Key Laboratory for Control Technology of Distributed Electric Propulsion Aircraft Jishou University Changde China College of Computer and Electrical Engineering Hunan University of Arts and Sciences Changde China

Aiming at the problem that the defects generated in the production and transportation of punched nickel-plated steel strips are not easy to be detected by deep learning methods, a lightweight, low-redundancy, and high-precision detection method is proposed in this paper. Firstly, a feature extraction network based on GhostNet is constructed, which reduces the amount of computation and feature redundancy while ensuring accuracy. Then the ECA module is applied to the detection head to perform weighted fusion of the features of different channels for better differentiation. Finally, the YOLO detection head is used for multi-scale detection. In the experiment, the mAP of 84.86% was obtained by this method, which proves that this method can be applied to the actual steel strip defect: detection.

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Optimal design of extractive dividing-wall column using an efficient equation-oriented approach

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Frontiers of Chemical Science and Engineering 2021年第1期15卷 72-89页

作者： Yingjie Ma Nan Zhang Jie Li Cuiwen Cao Centre for Process Integration Department of Chemical Engineering and Analytical ScienceSchool of EngineeringThe University of ManchesterManchester M139PLUK Key Laboratory of Advanced Control and Optimization for Chemical Processes(Ministry of Education) East China University of Science and TechnologyShanghai 200237China

The extractive dividing-wall column(EDWC)is one of the most efficient technologies for separation of azeotropic or close boiling-point mixtures,but its design is fairly *** this paper we extend the hybrid feasible path optimisation algorithm(Ma Y,McLaughlan M,Zhang N,Li ***&Chemical Engineering,2020,143:107058)for such optimal *** tolerances-relaxation integration method is refined to allow for long enough integration time that can ensure the solution of the pseudo-transient continuation simulation close to the steady state before the required tolerance is *** ensure the gradient and Jacobian information available for optimisation,we allow a relaxed tolerance for the simulation in the sensitivity analysis mode when the simulation diverges under small *** addition,valid lower bounds on purity of the recycled entrainer and the vapour flow rate in column sections are imposed to improve computational *** computational results demonstrate that the extended hybrid algorithm can achieve better design of the EDWC compared to those in *** energy consumption can be reduced by more than 20%compared with existing literature *** addition,the optimal design of the heat pump assisted EDWC is achieved using the improved hybrid algorithm for the first time.

关键词： design extractive dividing-wall column equation-oriented optimisation pseudo-transient continuation model hybrid algorithm

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Simulation and Analysis of Dynamic Stiffness of Electro-hydrostatic Actuators 9

Simulation and Analysis of Dynamic Stiffness of Electro-hydr...

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9th International Conference on Fluid Power and Mechatronics, FPM 2023

作者： Jiang, Chaofan Shang, Yaoxing Yu, Tian Li, Mingyang Wu, Shuai Liu, Zhicheng School of Automation Science and Electrical Engineering Beihang University Beijing China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang University Hangzhou China Ningbo Institute of Technology Beihang University Ningbo China Tianmushan Laboratory Xixi Octagon City Yuhang District Hangzhou China Science and Technology on Aircraft Control Laboratory Beihang University Beijing China Research Institute for Frontier Science Beihang University Beijing China

ISBN: (纸本)9798350304947

With the development of multi-electrochemical aircraft, the application of electro-hydrostatic actuators(EHA) in aircraft actuator system is increasing. The dynamic stiffness of the actuator has a non-negligible effect on the fluttering characteristics of the rudder surface. So it is necessary to study the dynamic stiffness of EHA. In this research, a method for calculating the dynamic stiffness of EHA is proposed. The mathematical model of EHA is established. The bulk modulus of hydraulic oil affected by gas content and pressure is added to the model. Build the simulation model in Simulink. The dynamic stiffness of EHA is simulated in frequency domain. Analyze the simulation results. The EHA dynamic stiffness decreases with the increase of hydraulic oil gas content in the whole frequency range. The trough frequency of dynamic stiffness amplitude decreases with the increase of hydraulic oil gas content. The EHA dynamic stiffness decreases with the increase of pump leakage coefficient in low frequency band. Therefore, in order to improve the dynamic stiffness of EHA, the hydraulic oil gas content and the piston pump leakage coefficient should be reduced. © 2023 IEEE.

关键词： Elastic moduli

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Safety-Critical Event-Triggered control for Networked control Systems Under Quantization and Time-Varying Delay

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IEEE Transactions on control of Network Systems 2025年

作者： Cheng, Xiao-Lin Liu, Kun-Zhi Wang, Yan-Wei Sun, Xi-Ming Dalian University of Technology Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education Dalian116024 China Aviation Industry Corporation of China Limited Shenyang Aircraft Design and Research Institute Shenyang110035 China

This paper is concerned with the problem of safety-critical control for nonlinear systems under the event-triggered control paradigm. In networked control systems, the controller generates control inputs based on sampled data to ensure the safety and stability of the plant. However, the combined effects of quantization and time-varying delay introduced by digital communication networks have rarely been considered in safety-critical control. This paper develops sufficient conditions for the design of safety and stabilizing control laws and provides explicit safety and input-to-state stability thresholds for networked control systems. In addition, we present provable extensions that can cope with the network-induced challenges mentioned above. In the context of periodic event-triggered mechanism, we formulate optimal control problems with constraints in the form of high-order control barrier functions and control Lyapunov functions. Finally, we apply the proposed strategy to adaptive cruise control, and illustrate that the event-based control approach effectively reduces communication traffic while achieving the control objectives. © 2014 IEEE.

关键词： Networked control systems

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Distributed Robust Fixed-Time Dynamic Average Consensus Protocol for Networked Agents

Distributed Robust Fixed-Time Dynamic Average Consensus Prot...

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第42届中国控制会议

作者： Weihao Li Mengji Shi Zili Ren Jiangfeng Yue Boxian Lin Kaiyu Qin School of Aeronautics and Astronautics University of Electronic Science and Technology of China The Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province

This paper seeks a robust dynamic average consensus protocol that makes the networked agents reach a common timevarying average state of multiple reference signals within an advanced preset time. It can be applied in fields such as multi-robot map merging and DC microgrid secondary control. Finite-time dynamic average consensus algorithms are studied in existing papers, while the convergence time is dependent on the initial states of the agents, so larger differences among their initial states may result in a slower convergence rate. Hence, a robust fixed-time dynamic average consensus scheme is presented in this *** settling time of the proposed scheme only relies on the parameters of the protocol and is independent of the initial values of agents. Specifically, the theoretical fixed-time convergence analysis is achieved by adopting the Lyapunov function, which indicates that dynamic average consensus can be reached within a fixed-time interval. Moreover, a damping term is added to the internal dynamics of agents to enhance the robustness of the protocol once the network interaction is changed. Finally, some numerical simulations are shown to verify the effectiveness of the proposed strategy.

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Task Order Filing Generation Algorithm Based on Multidimensional Association Rules and Similarity Matching

Task Order Filing Generation Algorithm Based on Multidimensi...

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2024 International Conference Optoelectronic Information and Optical Engineering, OIOE 2024

作者： Zhang, Xinyue Lv, Weimin Wei, Dingjiang Yang, Dongsheng Yang, Lin Naval Aviation University Yantai China No. 91593 of PLA Sanya China The Laboratory for Military-Civilian Integration Emergency Command and Control Jinan University Guangzhou China School of Public Management/Emergency Management Jinan University Guangzhou China Key Laboratory of Information System Engineering National University of Defense Technology Changsha China School of Information and Intelligent Engineering University of Sanya Academician Guoliang Chen Team Innovation Center University of Sanya Sanya China

ISBN: (数字)9781510688209

ISBN: (纸本)9781510688193

This paper examines the potential for leveraging the order dispatch algorithm in the commercial domain to enhance the intelligent allocation of military combat tasks, thereby improving the speed and accuracy of command decision-making in the context of intelligent warfare. The study proposes an "order-based" command and control model, which aims to overcome the efficiency bottleneck and information lag problem in traditional combat task allocation. The algorithmic design incorporates multi-dimensional association rules and similarity matching algorithms to guarantee the optimal matching of combat tasks and resources, thereby achieving the objectives of rapid response, efficient resource utilization, and enhanced combat effectiveness. This paper focuses on the challenges and advantages of this model in the context of naval warfare. It highlights the strategic value of order-based command and control in non-direct confrontation missions, such as reconnaissance, patrol, and intelligence gathering. The utilization of the "combat cloud," artificial intelligence, and a highly integrated command network enables the precise allocation of resources and the rapid execution of tasks. This, in turn, enhances the ISR capability, network-centered warfare effectiveness, and cross-domain synergistic warfare capability in naval warfare. The study also delineates the specific implementation process of the algorithm, which includes multi-dimensional association rule mining and similarity matching based on historical cases, with the objective of generating optimal combat scenarios and ensuring the effective execution of task orders. © 2025 SPIE.

关键词： Naval warfare

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Construction, verification and engineering application of bleed air system simulation model based on MOC8 test engineering simulator

Construction, verification and engineering application of bl...

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CSAA/IET International Conference on aircraft Utility Systems (AUS 2024)

作者： Yang Cao Mengdi Cai Xiaoyu Qu COMAC Shanghai Aircraft Design & Research Institute 5188 Jinke Road Shanghai People's Republic of China State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai 200126 People's Republic of China

ISBN: (数字)9781837242108

The engineering simulator is a test platform that simulates the flight environment with high fidelity, and integrates the system simulation model that meets the requirements, so as to support the system design and airworthiness verification test. Based on the test requirements of MOC8 engineering simulator, this paper proposes a set of model development, validation and application methods for the air source system, which provides an effective way for the development of on-board system simulation model of MOC8 engineering simulator, and is of practical significance in engineering.

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