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International Conference on Guidance, Navigation and control, ICGNC 2022

作者： Yang, Yukun Tang, Qiang Li, Hao Ma, Shichao Zang, Xiheng AVIC Xi’an Flight Automatic Control Research Institute Xi’an710076 China National Key Laboratory of Science and Technology On Aircraft Control Xi’an710076 China

ISBN: (纸本)9789811966125

The collaborative flight of unmanned aerial vehicle (UAV) swarm has always been a hot issue in control science. This paper designs a scalable componentized software architecture for the actual scenario of fixed-wing UAV swarm collaborative flight. Base on the hierarchical structure of the UAV swarm system, we analyze the software requirements of functions and performance, and propose an onboard software architecture, which consist of real-time operating system (RTOS), board support package (BSP) and application layer software. In addition, the flight control and swarm communication of UAV swarms are described in this paper. Finally, the proposed software architecture is verified by field test and data analysis. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Fixed wings

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Application of Computer Vision technology in Collaborative control of the "Zhurong" Mars Rover 18th

Application of Computer Vision Technology in Collaborative C...

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18th Chinese Conference on Image and Graphics technology and Application Conference, IGTA 2023

作者： Wang, Jia Hu, Guolin Li, Dafei Wang, Saijin Han, Shaojin Li, Xin Liu, Xiaohui Cheng, Ziqing Zhang, Hui Huang, Zhao He, Ximing Wang, Xiaoxue Beijing Aerospace Control Center Beijing100094 China Key Laboratory of Science and Technology on Aerospace Flight Dynamics Beijing100094 China

ISBN: (纸本)9789819975488

The "Zhurong" Mars rover successfully landed on the surface of Mars on May 22, 2021, and began its inspection and exploration. Currently, it has traveled 1921 m and achieved a series of important scientific discoveries. Due to objective difficulties such as harsh terrain conditions, insufficient energy, and limited communication, the "Zhurong" Mars rover adopts a collaborative control mode of "semi intelligent on board autonomous + ground teleoperation". Computer vision technology is the key core technology supporting the collaborative control of the rover. In the enter descent landing stage and Mars surface roving, computer vision technology has broken through key technologies, such as rapid localization of the lander, terrain analysis of landing areas, three-dimensional terrain reconstruction, terrain classification, navigation and positioning, path planning, and simulation verification, solved the problem of long-term efficient mobile technology of the rover, and significantly expanded the detection range of the Mars rover, robustly guaranteeing the efficient and stable inspection and long-term survival of the Mars rover. This paper elaborates on the aforementioned technologies and their special on-orbit applications. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Motion planning

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Research on the Construction and Applicability of Fatigue Management Model for flight-Line Maintenance Personnel 24th

Research on the Construction and Applicability of Fatigue Ma...

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24th Conference on Man-Machine-Environment System Engineering, MMESE 2024

作者： Li, Guocai Zhang, Gewen State Key Laboratory of Fire Science University of Science and Technology of China Anhui Hefei230026 China Development Planning and Discipline Building Division Civil Aviation University of China Tianjin300300 China Flight School Civil Aviation University of China Tianjin300300 China

ISBN: (纸本)9789819771387

In order to strengthen the fatigue management ability for flight-line maintenance personnel and ensure the safe operation of civil aviation aircrafts, the paper identifies 19 correlation indexes related to the fatigue of line maintenance personnel by analyzing the questionnaire answers of 829 line maintenance personnel in China. Then the AHP-entropy method is used to determine the weighting system of fatigue indexes for line maintenance personnel. Based on this, a fatigue management model for line maintenance personnel is established with the recognition thresholds set up for different fatigue states. It is found out through verification that, the fatigue management model for line maintenance personnel established in this paper is over 80% accurate in recognizing fatigue, proving to be reliable in fatigue recognition. The study provides decision support for the fatigue management of line maintenance personnel, and enables airlines to develop management software that carries out the whole process fatigue management of line maintenance personnel. © Beijing KeCui Man-Machine-Environment System Engineering technology Research Academy 2024.

关键词： Civil aviation

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Bifurcation analysis of dual-sidestay landing gear locking performance considering joint clearance

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Chinese Journal of Aeronautics 2022年第7期35卷 209-226页

作者： Kui XU Yin YIN Yixin YANG Hong NIE Xiaohui WEI State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Sidestay lock mechanism is an important part of landing gear system,and the locking performance can be analyzed based on changes in its ***,during numerical continuation analysis of fully-rigid dual-sidestay landing gear without clearance,it has been found that the appearance of bifurcation points does not necessarily imply that both sidestay links can be locked *** problem reveals the limitations of fully-rigid model with ideally-articulated in solving dual-sidestay mechanisms with extremely high motion ***,this study proposes a bifurcation analysis method for synchronous locking of dual-sidestay landing gears,which takes into consideration the joint *** in-depth analysis of this problem,we initially build kinematic and mechanical models of a landing gear mechanism that consider joint ***,the models are solved based on *** fundamental causes of synchronous locking are discussed in detail,and the number of bifurcation points is found to be closely related to whether the landing gear is completely ***,the effects of structural parameters on the synchronous locking are analyzed,and the feasible region of parameters satisfying synchronous locking condition is given,which agrees well with the test results.

关键词： Bifurcation Clearance Dual-sidestay landing gear Numerical continuation Synchronous locking

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Optimization design containing dimension and buffer parameters of landing legs for reusable landing vehicle

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Chinese Journal of Aeronautics 2022年第3期35卷 234-249页

作者： Bo LEI Ming ZHANG Hanyu LIN Hong NIE Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle Nanjing University of Aeronautics and AstronauticsNanjing 210016China State Key Laboratory of Mechanics and Control of Mechanical Structure Nanjing University of Aeronautics and AstronauticsNanjing 210016China

For the landing legs with single air chamber in the buffer structure of the reusable landing vehicle,the geometric topological models and the dynamic model associated with the hard points of the landing legs are *** geometric constraint relationship in the design of the landing legs is also *** whole vehicle dropping test is conducted,and the test results agree well with that of the simulation model,which validates the dynamic *** on the verified model,the effect of hard point positions on the performance of the landing system is *** multidisciplinary collaborative optimization algorithm and archive-based micro genetic algorithm(CO-AMGA)are used to optimize the design parameters that contain the hard points and the *** with artificial iteration,the maximum landing impact acceleration response of the vehicle and the buffer struct maximum force are reduced by 30.70%and 14.51%respectively,and the maximum length of retractable pillar decreases by 8.54%while the design margin increases by 69.11%.The proposed optimization method is efficient and can greatly facilitate the design of landing legs.

关键词： Dynamics Impact test Landing system Optimization design Reusable landing vehicle

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THE DISPERSION CHARACTERISTICS OF INFECTIOUS DROPLETS IN A CIVIL AIRCRAFT CABIN WITH DIFFERENT AIR SUPPLY RATES

THE DISPERSION CHARACTERISTICS OF INFECTIOUS DROPLETS IN A C...

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

作者： Li, Pei Sun, Jianhong Zheng, Daren Xu, Changyue Key Laboratory of Aircraft Environment Control and Life Support MIIT Nanjing University of Aeronautics and Astronautics Nanjing210016 China Key Laboratory of Civil Aviation Emergency Science and Technology CAAC Nanjing University of Aeronautics and Astronautics Nanjing211106 China

This work presents a simulation of infectious droplet dispersion in a civil aircraft cabin with the Euler-Lagrangian method. The influence of different rates of air supply on the airflow field, droplet dispersion, and concentration distribution of infectious droplets are analysed. The results show the rates of air supply have a significant impact on airflow filed. The area of vortex circulation region in the cabin is reduced. Total mass of infectious droplets in the cabin basically reaches stability after the infector exhales the infectious droplets for 120 seconds. The total mass in the civil cabin is 3.56×10-12 kg with the 6.9 L per second per person and respectively decreased by 4.21% and 22.75% with increasing the air supply rate to 10 L per second per person and 16 L per second per person. The concentration of infectious droplets in each passenger's respiratory zone is examined. The infector located at the middle of the cabin or sitting near the aisle could affect more passengers and thus, the infector is recommended to sit by the window during the epidemic. © The Institution of Engineering & technology 2024.

关键词： Vortex flow

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Preshaping Trajectory Optimization and control of Flexible Hypersonic Vehicle for Vibration Suppression 42

Preshaping Trajectory Optimization and Control of Flexible H...

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42nd Chinese control Conference, CCC 2023

作者： Tang, Yifang Hu, Chaofang Hu, Yongtai School of Electrical and Information Tianjin University Tianjin300072 China Aviation Key Laboratory of Science and Technology on Aircraft Control Facri Xi'an710065 China

ISBN: (纸本)9789887581543

Considering the special structural design and complex working conditions of flexible hypersonic vehicles, elastic vibrations can tremendously affect the control performance of hypersonic vehicles. In this paper, from the perspective of trajectory, a vibration suppression strategy for hypersonic vehicle including trajectory optimization and input shaping is proposed. The minimum sum of the squares of elastic modes and derivatives is selected as the performance index, and the optimal trajectory is calculated through direct collocation method. Then, an input shaper is designed for the first-order elastic mode to reshape the optimal trajectory. Meanwhile, the Tube model predictive control (Tube-MPC) is utilized to ensure the stable flight of the vehicle. Finally, the simulation results demonstrate the effectiveness of the proposed method. © 2023 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Model predictive control

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Integrated online identification of aerodynamic and thrust parameters for air-breathing aircraft 3

Integrated online identification of aerodynamic and thrust p...

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2024 3rd International Conference on Aerospace and control Engineering, ICoACE 2024

作者： Jiang, Zhenyu Li, Xiaodong Liu, Shuang College of Aerospace Science and Engineering National University of Defense Technology Hunan Changsha410073 China Hunan Provincial Key Laboratory of Aerospace Cross-Domain Flight Vehicle System and Control Technology Changsha410073 China

A method for integrated online identification of aerodynamic and thrust parameters has been proposed. Firstly, a motion model of an aircraft powered by a solid rocket ramjet engine was established in the longitudinal plane. Secondly, polynomial models of aerodynamic and thrust coefficients were established for the horizontal flight segment. Then, an integrated online identification simulation of aerodynamic and thrust parameters was carried out using the unscented Kalman filter method. The results indicate that the proposed method has high identification accuracy and efficiency. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Kalman filters

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MFE-Net: A remote sensing image dehazing model for the visual system of a flight simulator 6

MFE-Net: A remote sensing image dehazing model for the visua...

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6th International Conference on Geoscience and Remote Sensing Mapping, GRSM 2024

作者： Ge, Wenyi Wang, Bo Liu, Qi Qin, Xiaolin Tan, Shihan Wang, Shengjie Yuan, Xia College of Computer Science Chengdu University of Information Technology Chengdu610255 China Chengdu Institute of Computer Applications Chinese Academy of Sciences Chengdu610213 China Jiuzhou Air Trafic Control Sichuan Jiuzhou Investment Holding GroupCo. Ltd Mianyang621000 China The Key Laboratory of Flight Techniques and Flight Safety Civil Aviation Flight University of China Guanghan618307 China

ISBN: (纸本)9781510688018

Obtaining high-quality remote sensing images is crucial in generating a three-dimensional terrain for flight simulators. However, due to the presence of haze and other impact factors, collected remote sensing images usually suffer from blurred details, which limits its applicability real-world applications. To address this issue a deep learning-based dehazing model is proposed to advance hazy remote sensing images to build flight simulator visual systems. The encoder-decoder architecture is proposed to perform the image dehazing, in which an improved feature extraction module is designed to extract both global and local semantic features across multi-resolutions. In addition, the pixel-pixel and region-region mechanism are innovatively designed to achieve deep mapping relationships and further enhance image dehazing. Experimental results demonstrate that the proposed model outperforms other comparative baselines, achieving high-confidence dehazing in multi-scene remote sensing images, and with good generality and applicability in multi-resolution flight simulators and multi-terrain remote sensing. © 2025 SPIE.

关键词： flight simulators

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A Review of Machine Learning Methods to Solve flight Scheduling Research

A Review of Machine Learning Methods to Solve Flight Schedul...

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Big Data Engineering and Education (BDEE), International Conference on

作者： Yanbin Pan Haiwen Xu Jide Qian Mengtao Chu Hao Yan Faculty of Science Civil Aviation Flight University of China Guanghan China Key Laboratory of Civil Aviation Flight Technology and Flight Safety Civil Aviation Flight University of China Guanghan China

ISBN: (数字)9798350388268

ISBN: (纸本)9798350376463

The crew scheduling problem is a crucial component of airline operations planning. Using traditional operations research optimization methods to optimize the crew scheduling process can enhance the scientific and accurate nature of the plan, significantly impacting the airline's operational efficiency, cost savings, and ensuring the safety of flight operations. However, due to the increasing number and complexity of modern flight schedules, traditional combinatorial optimization algorithms face enormous computational pressure and cost. Additionally, the need for timely recovery of problem flights imposes limitations on traditional methods. Therefore, by reviewing recent algorithms that use machine learning to address combinatorial optimization problems, this research explores and examines the integration methods, algorithmic logic, and areas for improvement. It also investigates the potential of these methods for solving flight scheduling issues, providing insights and references for future applications of machine learning in addressing flight scheduling problems.

关键词： Schedules Machine learning algorithms Costs Operations research Reviews Processor scheduling Optimization methods Machine learning Safety Airline industry

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