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

作者： Li, Kaining Wu, Yan Lu, Qihang Zhang, Dalin Key Laboratory of Aircraft Environment Control and Life Support Ministry of Industry and Information Technology Nanjing University of Aeronautics and Astronautics Nanjing China Nanjing Engineering Institute of Aircraft Systems Nanjing China

In order to reduce the engine bleed air consumption of fighter jet environmental control systems with high-power electronic equipment compartments, a comparative analysis was conducted on the typical turbine-powered closed cycle systems TP-ACS/HPWS and PTMS-ACS/HPWS. On this basis, improvements were made to PTMS-ACS/HPWS, and the TP-CACS architecture was proposed. The influence of flight conditions, electronic cabin heat load, and other parameters on the engine bleed air consumption of the three systems was analysed through modelling and calculation. The calculation results show that by adjusting the operating pressure and flight altitude, PTMS-ACS/HPWS generally consumes less engine bleed air than TP-ACS/HPWS, and its operation adjustment is more convenient;on this basis, a turbine-powered closed air cycle system TP-CACS with independent regulation of cabin air supply is proposed, and under different electronic cabin thermal loads and flight conditions, the TP-CACS engine has the lowest bleed airflow consumption and the best performance;one of the development directions for future environmental control systems is to combine closed loop systems with independent cabin air supply. © The Institution of Engineering & technology 2024.

关键词： CLOSED AIR CYCLE SYSTEM ELECTRONIC EQUIPMENT COOLING PERFORMANCE ANALYSIS POWER TURBINE

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Distributed Optimization and Scaling Design for Solving Sylvester Equations

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Journal of Systems Science & Complexity 2024年第6期37卷 2487-2510页

作者： CHENG Songsong YU Xin ZENG Xianlin LIANG Shu HONG Yiguang Anhui Engineering Laboratory of Human-Robot Integration System and Intelligent Equipment School of Electrical Engineering and AutomationAnhui UniversityHefei 230601China Key Laboratory of Intelligent Control and Decision of Complex Systems School of AutomationBeijing Institute of TechnologyBeijing 100081China Department of Control Science and Engineering Tongji UniversityShanghai 201804China Shanghai Research Institute for Intelligent Autonomous Systems Tongji UniversityShanghai 201210China

This paper develops distributed algorithms for solving Sylvester *** authors transform solving Sylvester equations into a distributed optimization problem,unifying all eight standard distributed matrix *** the authors propose a distributed algorithm to find the least squares solution and achieve an explicit linear convergence *** results are obtained by carefully choosing the step-size of the algorithm,which requires particular information of data and Laplacian *** avoid these centralized quantities,the authors further develop a distributed scaling technique by using local information *** a result,the proposed distributed algorithm along with the distributed scaling design yields a universal method for solving Sylvester equations over a multi-agent network with the constant step-size freely chosen from configurable ***,the authors provide three examples to illustrate the effectiveness of the proposed algorithms.

关键词： Distributed optimization least squares solution linear convergence rate step-size interval Sylvester equation

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UNCERTAINTY ANALYSIS METHOD FOR HIRF TEST OF CIVIL aircraft SYSTEM

UNCERTAINTY ANALYSIS METHOD FOR HIRF TEST OF CIVIL AIRCRAFT ...

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

作者： Meng, Fanjiao Wei, Jiasi Shanghai Aircraft Design and Research Institute of CO MAC Experimental Verification Center State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai China Key Laboratory of Bioanalvsis and Metrology for State Market Regulation Shanghai Institute of Measurement and Testing Technology Shanghai China

Utilizing the reverberation chamber to build a system-level HIRF test system for civil aircraft, and the influencing factors of the uncertainty of the test system were qualitatively analyzed through the establishment of a mathematical model. The uncertainty is extended by quantitative analysis of the mathematical model, the measurement uncertainty of the HIRF test system is calculated, and the uncertainty factor influence is controlled to ensure the accuracy and reliability of the test results. © The Institution of Engineering & technology 2024.

关键词： Reverberation

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A Head and Eye Pose Detection and Tracking Method in Intelligent Cockpits 16

A Head and Eye Pose Detection and Tracking Method in Intelli...

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16th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2024

作者： Fan, Minghao Guo, Weihong Cheng, Sheng Zhang, Shenghai Zhao, Qijie Shanghai University School of Mechatronic Engineering and Automation Shanghai China State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai Aircraft Design and Research Institute Shanghai China Commercial Aircraft Corporation of China Ltd Shanghai China

ISBN: (纸本)9798331540241

With the ongoing progress in artificial intelligence, human-machine interaction technologies, rooted in electrification, connectivity, intelligence, and sharing, have emerged as the predominant focus for the future of intelligent cockpits. This paper, by scrutinizing the present requirements for information processing from a human-machine interaction standpoint, proposes a head and eye pose detection and tracking method in intelligent cockpits, enabling accurate perception of the driver's intentions. This scheme incorporates three core modules: information acquisition, information processing, and intention perception. To implement this, we employ a Driver Monitoring System (DMS) to gather comprehensive facial data from drivers. By integrating both depth and grayscale feature information from these recordings, we accurately identify key facial landmarks and the precise detection of the head and eye pose of the driver. Leveraging our custom-built simulated driving environment, we then undertake an in-depth analysis of the drivers' behavioral intentions using the proposed head and eye position detection method, effectively validating the reliability and efficacy of our proposed intention awareness solution. This research thereby charts a new course for advancing human-machine interaction designs and strategies for intelligent cockpits, offering a fresh perspective of the head and eye pose detection and tracking method that can pave the way for enhanced safety, efficiency, and user experience in the cockpits of tomorrow. © 2024 IEEE.

关键词： Reliability analysis

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Lightning Current Sweep Damage Test System Based on Energy Conversion 19th

Lightning Current Sweep Damage Test System Based on Energy C...

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19th Annual Conference of China Electrotechnical Society, ACCES 2024

作者： Duan, Zemin Tong, Chen Qu, Minglei Huang, Yeyuan School of Electrical Engineering and Automation Hefei University of Technology Hefei China National Key Laboratory of Electromagnetic Information Control and Effects Hefei China Key Laboratory of Strong Electromagnetic Environment Protection Technology Aviation Science and Technology Hefei China Key Laboratory of Aircraft Lightning Protection of Anhui Province Hefei China

ISBN: (纸本)9789819608966

To solve the problem of difficulty in simulating dynamic sweep damage of lightning current, this paper established a new lightning current sweep damage test system using motors and launch wheels. The speed of the test piece and the temperature during the damage process were measured by high-speed cameras and infrared thermometers. The speed of the test piece was 34 m/s and the temperature exceeded 600 °C. At the same time, a new lightning current component C generator topology and control method were proposed. The load current and inductor current were used to form a double closed-loop PI negative feedback controller to ensure that the load current meets the standard output requirements. The study in this paper has certain guiding significance for the direct effect sweep damage assessment of composite materials and the design of lightning current generators. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： High speed cameras

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Design and Implementation of a Ground control Station for Multiple Fixed-Wing UAVs

Design and Implementation of a Ground Control Station for Mu...

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International Conference on Guidance, Navigation and control, ICGNC 2022

作者： Wen, Jiayun Tang, Qiang Li, Hao AVIC Xi’an Flight Automatic Control Research Institute Xi’an710076 China National Key Laboratory of Science and Technology on Aircraft Control Laboratory Xi’an710076 China

ISBN: (纸本)9789811966125

In recent years, Unmanned Aerial Vehicles (UAVs) have been used in many fields by virtue of their flexible design, low cost and zero casualties. With the deepening application of UAVs, the tasks they undertake are gradually becoming more complex and can no longer be accomplished by a single UAV alone, so multiple UAVs are needed to collaborate in order to perform the tasks. In this paper, a UAV ground control station software system is designed for the characteristics of multiple UAVs to perform tasks. The system is designed with the key requirement of reducing the operator’s workload in mind, while taking into account the differences in control and surveillance between multiple UAVs and a single UAV. After defining the functional requirements of the ground control station, the development and implementation of the ground station software is carried out, and finally, an application example of the ground station software is presented. The experiments show that the proposed ground station has some engineering value. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Fixed wings

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Research on Adaptive Fault-Tolerant control for Manned Lunar Rover 43

Research on Adaptive Fault-Tolerant Control for Manned Lunar...

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43rd Chinese control Conference, CCC 2024

作者： Qian, Zhouyuan Cao, Tao Hu, Tao Cheng, Hao Zheng, Bo Shanghai Aerospace Control Technology Institute Shanghai201109 China Shanghai Key Laboratory of Aerospace Intelligent Control Technology Shanghai201109 China Shanghai Manned Lunar Exploration Integration Innovation Center Shanghai201109 China

ISBN: (纸本)9789887581581

Since the lunar terrain conditions are very hummocky, there is a risk of simultaneous failure of multiple drive motors and steering motors for manned lunar rover throughout the maneuver. An adaptive fault-tolerant control method based on direct yaw-moment control is proposed to ensure that the rover can still drive stably and accomplish the detection mission despite multi-motor failures. The method adopts a hierarchical control architecture, where the upper layer solves the vehicle's yaw moment demand based on the astronaut's driving intention and vehicle condition, and the lower layer carries out torque allocation by introducing failure factor to represent the motor failure situation. Meanwhile, the objective function is designed by combining longitudinal drive control, yaw moment control and tire load rate control, and is adjusted by slip rate to restrain tire slip. Through the joint simulation experiments, the effectiveness of the proposed method is verified. The results show that the driving stability and vehicle maneuverability are guaranteed even in the event of multi-motor failures. © 2024 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Maneuverability

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Research on the Transient Temperature Field of the High-Speed Permanent-Magnet Motor for Dragging Pulsed Alternator 18th

Research on the Transient Temperature Field of the High-Spee...

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18th Annual Conference of China Electrotechnical Society, ACCES 2023

作者： Wan, Yuan Zhang, Xu Jia, Yuqi Guo, Jian Li, Wenlong School of Automation Nanjing University of Science and Technology Nanjing10094 China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration AVIC Nanjing Engineering Institute of Aircraft System Nanjing211102 China

ISBN: (纸本)9789819710713

For dragging the pulsed alternator, the high-speed permanent-magnet synchronous motor (HSPMSM) is required with a high-power density. Considering the specific working condition that the speed and load both change with time, the steady-state thermal analysis is not applicable to check the effectiveness of thermal design for the dragging motor. This paper studies the characteristics of the losses of a 300 kW, 12000 rpm dragging motor with the variation of time. Then based on the fluid-solid coupling analysis method, the transient temperature field analysis was then carried out. The variation of temperature field distribution over the time and the influence of discharging times are both discussed. With the pulsed alternator discharging 20 bursts continuously, that is 60 shorts, the temperature rise of the dragging motor is 60.9% of that of the steady-state with the highest speed and maximum power. This paper lays the foundation for the later design and optimization of the dragging motor. © Beijing Paike Culture Commu. Co., Ltd. 2024.

关键词： Permanent magnets

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Structural Crack Imaging Under Temperature Variation Based on Gaussian Mixture Model and Guided Wave 15

Structural Crack Imaging Under Temperature Variation Based o...

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15th IEEE Global Reliability and Prognostics and Health Management Conference, PHM-Beijing 2024

作者： Li, Jiaxuan Ren, Yuanqiang Yuan, Shenfang Gao, Limin State Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing University of Aeronautics and Astronautics Nanjing China COMAC Beijing Aircraft Technology Research Institute Commercial Aircraft Corporation of China Beijing China

ISBN: (纸本)9798350354010

The environment and operation conditions (EOCs) of aircraft structures pose a significant challenge for advancing structural health monitoring from laboratory to practical applications. To address this problem, a Gaussian mixture model (GMM) and guided wave (GW) based imaging method is presented here for effective crack monitoring in aircraft metal structures under the influence of EOCs. In this method, in order to suppress the EOCs introduced uncertain influence and to generate EOCs independent feature signal, which is solely influenced by structural damages, the GMM is adopted. During the monitoring process, utilizing the derived EOCs independent feature signals enables the execution of GW imaging, yielding a damage map that facilitates accurate damage localization. The method is validated on a perforated aluminum plate from -50℃ to 80℃, confirming reliable damage imaging and localization. © 2024 IEEE.

关键词： Guided electromagnetic wave propagation

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INVESTIGATION ON HEAT DISSIPATION CHARACTERISTICS OF COMPOSITE FUEL TANK SKINS

INVESTIGATION ON HEAT DISSIPATION CHARACTERISTICS OF COMPOSI...

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

作者： Li, Rongjia Liao, Jie Yuan, Gengmin Zhang, Dalin Tang, Hao Zhu, Guangya AVIC Chengdu Aircraft Design & Research Institute Chengdu China Key Laboratory of Aircraft Environment Control and Life Support Ministry of Industry and Information Technology Nanjing University of Aeronautics & Astronautics Nanjing China

The heat dissipation characteristics of fuel tank skins are critical for fuel thermal management. The overall heat transfer coefficient of the fuel tank skin mainly depends on the heat transfer coefficients inside and outside the bottom plate of the fuel tank, as well as the skin’s thermal conductivity and thickness. In this paper, a three-dimensional model is established based on the fluid-volume method to analyze the heat dissipation characteristics of composite fuel tank skins. The developed model was validated through various experimental tests. The results show that the air-side heat transfer coefficient has a significant effect on the total heat transfer coefficient of the skin, especially when the airplane is at a higher altitude or lower flight speed. The utilization of composite materials for the fuel tank skin reduces the overall heat transfer coefficient, and this reduction is more pronounced as the air-side convective heat transfer coefficient increases and the skin thickness increases. When the remaining fuel level is less than 20%, the overall heat transfer coefficient can increase by as much as 21. 1% compared to that of under full fuel conditions. The insights from this investigation are expected to benefit future fuel tank thermal management. © The Institution of Engineering & technology 2024.

关键词： aircraft fuel tanks

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