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

作者： Fan, Lv Shanghai Aircraft Design and Research Institute State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai201210 China

According to the requirements of CCAR25 for civil aircraft electrical power system ground laboratory airworthiness verification test, the same main generator as the aircraft must be used. This paper designs a multifunctional ground testing device for the main generator to address the functional deficiencies of the main generator in the ground laboratory, providing external oil circulation, operation status monitoring, oil temperature control, and oil injection functions that are missing in the ground laboratory. Detailed design and implementation of the functional modules of the device have been carried out and applied to the ground laboratory airworthiness verification test of the civil aircraft electrical power system. The test shows that the device can meet the functional requirements of the main generator ground test operation. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： aircraft power systems

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Analysis of fire test methods and airworthiness requirements for materials in the cabin of civil aircraft 4

Analysis of fire test methods and airworthiness requirements...

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2024 4th International Conference on Advanced Materials and Chemical Engineering, AMCE 2024

作者： Huang, Weixing Yang, Tonghui Lv, Zhengye Shanghai Aircraft Design and Research Institute State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai315211 China

The safety of aircraft cabin materials is related to the safety of passengers and aircraft. With the development of science and technology, the types of materials are becoming more and more abundant, with frequent applications in the aircraft cabin, cargo compartment, and other locations. A large number of these materials improve the economic comfort of the aircraft. When a fire occurs, the performance of the materials involved can significantly influence the fire's progression, which in turn affects the safety of passengers and the aircraft. Additionally, it can impact emergency evacuation procedures. To enhance safety in aircraft research, development, and manufacturing, it is essential to understand the flame-retardant properties of materials used in aircraft. Scientific methods must be employed to verify the fireproofing capabilities of these materials, and data-driven evaluations should assess their flame-retardant properties. This is crucial to ensure the safety of passengers and the aircraft itself. In the event of a fire, effective materials can slow the spread of flames, allowing passengers to evacuate promptly and increasing their chances of survival. By analyzing the cabin material fire test verification method and airworthiness requirements, the aircraft cabin material fire requirements are outlined to provide guidelines for the commercial aircraft cabin material fire verification work, to guide the aircraft design process of cabin material selection, and to accelerate the pace of airworthiness certification. © Published under licence by IOP Publishing Ltd.

关键词： aircraft materials

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Research on Digital Twin System of Large aircraft Ground Dynamics Test Platform

Research on Digital Twin System of Large Aircraft Ground Dyn...

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2024 China Automation Congress, CAC 2024

作者： Sun, Jiyang Wang, Hongxin Shao, Yifan Li, Shengjie State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai Aircraft Design & Research Institute Shanghai China

ISBN: (纸本)9798350368604

The large aircraft ground dynamics test platform is a significant research infrastructure to test and simulate the ground dynamics characteristics of aircraft. However, there exist many problems in physical experiments and traditional model-based virtual experiments of this platform. Here we introduce the emerging digital twin technology to fully expand its comprehensive verification capabilities and enhance the digitized development level of the large aircraft ground dynamics systems. Firstly, the technical requirements of the digital twin system for the large aircraft ground dynamics test platform are analyzed, and its schematic design is completed. Then, a four-tier technical architecture including physical object, data network, digital twin and application scenario is constructed. An in-depth analysis of this digital twin system focusing on its potential research and application scenarios for aircraft ground dynamics is illustrated. Finally, the key technologies of digital twin construction and evaluation, as well as high-performance virtuality-reality hybrid networks are elaborated and analyzed, providing a certain basis for subsequent specific design and development. © 2024 IEEE |

关键词： Research aircraft

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Effects of Environmental Factors on Snow Simulation in Civil aircraft Ground Testing 5

Effects of Environmental Factors on Snow Simulation in Civil...

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5th International Conference on Electronic Engineering and Informatics, ICEEI 2023

作者： Wang, Hao Li, Zhengqiang Xu, Desheng Wang, Wei Shanghai Aircraft Design and Research Institute State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai China

ISBN: (纸本)9781643685021

In this paper, the effects of environmental factors on snow simulation in civil aircraft ground testing are analyzed and technical support is provided for adaptive testing of civil aircraft in snowfall environments. Snowy weather has a significant impact on the propulsion system, flight control system, and flight performance of civil aircraft. Based on the analysis of natural and artificial snow formation mechanisms and the requirements for snowfall simulation testing, an outdoor simulation system for snowfall in civil aircraft ground testing was established. Tests were conducted to investigate the influence of environmental factors on snowfall simulation. Temperature and humidity ranges were established to achieve snowfall simulation, creating snowfall environments with specific snowfall intensity and density within these ranges. The results in this paper effectively support the adaptive testing of civil aircraft in snowfall environments. © 2024 The Authors.

关键词： Snow

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Snowfall Intensity Measurement in Civil aircraft Ground Testing 5

Snowfall Intensity Measurement in Civil Aircraft Ground Test...

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5th International Conference on Electronic Engineering and Informatics, ICEEI 2023

作者： Wang, Hao Li, Zhengqiang Xu, Desheng Wang, Wei Shanghai Aircraft Design and Research Institute State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai China

ISBN: (纸本)9781643685021

In this paper, research on snowfall intensity measurement in civil aircraft ground testing is discussed, providing technical support for adaptability testing and verification of civil aircraft in snowfall environments. Snowy weather has a significant impact on the propulsion system, flight control system, and flight performance of civil aircraft. By analyzing the mechanisms of snow formation and the requirements for simulating snowfall environments in civil aircraft airworthiness tests, the measurement methods for snowfall intensity were studied. The feasibility and advantages of the hot-wire method for measuring snowfall intensity were proposed. According to the simulation requirements of civil aircraft snowfall experiments, a snowfall environment simulation system was constructed. A comparative experiment was carried out to measure total water content using the hot-wire and weighing methods. Experimental results show that the hot-wire method has good real-time performance in measuring the total water content in simulated snowfall environments and can simultaneously measure the liquid water content. In contrast, the weighing method calculates the total water content by obtaining continuous snow accumulation weight and snowfall rate but has poorer real-time performance. During a 1000-second comparative test, the hot-wire method and the weighing method measured average total water content values of 2.58 g/m3 and 2.75 g/m3, respectively, with a 6% difference between the two methods. The experimental results indicate that the hot-wire method has high real-time performance in measuring snowfall intensity, relatively accurate test results, and can simultaneously measure the dryness and wetness of snow, indicating that the hot-wire method has good application prospects in the field of measuring simulated snowfall intensity. Using the research results can effectively support adaptability testing and verification of civil aircraft in snowfall environments. © 2024 The Author

关键词： Snow

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Measurement of aerodynamic heating of micro-scale rotational shearing flow and its heat flux identification

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Chinese Journal of Aeronautics 2025年第4期38卷 70-90页

作者： Yuan LIU Yuanwei LYU Jingyang ZHANG Chunyang LI Jingzhou ZHANG Zhongwen HUANG College of Astronautics Nanjing University of Aeronautics and AstronauticsNanjing 210016China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Beijing 120016China College of Energy and Power Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Key Laboratory of Thermal Management and Energy Utilization of Aircraft Nanjing 210016China

This study conducted the experimental investigation of aerodynamic heating of Micro-scale Rotational Shearing Flow with Axial Limited-Length(MRSFALL).The temperature riseof the stator is captured by the high response *** eccentricity ratio and clearanceheight are guaranteed by means of instantaneous trajectory and torsion monitoring of the *** result shows that the maximum temperature rise takes place upstream of the minimum clear-ance height along circumferential *** distribution of temperature rise presents asymmet-ric curve along axial direction,and peak value occurs near the dimensionless axial position *** effect of aerodynamic heating becomes notable as the rotational speed is larger than3×10^(4)r/*** effect of end leakage and the viscous dissipation have great impact on temper-ature rise of *** specially,the peak value of temperature rise at dimensionless clear-ance height of 0.0080 is larger than the case at dimensionless clearance height of ***,when the eccentricity ratio is too large,the viscous dissipation is induced,and theadditional temperature rise is *** heat flux identification of shear flow has been realizedby Sequential Function Specification Method(SFSM)and its estimation of thermal load has been *** heat flux induced by the aerodynamic heating in this study varies from 950 W/m^(2)to1330 W/m^(2).

关键词： Micro-scale Rotational Shearing Flow with Axial Limited-Length(MRSFALL) Hyper-rotate-speed End leakage Aerodynamic heating experimental measurement Heat flux identification

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Lateral-directional stability and control augmentation system design for civil aircraft simulator

Lateral-directional stability and control augmentation syste...

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2024 International Conference on Aerospace and Mechanics, ICAM 2024

作者： Chen, Lei Xie, Gangtao State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai Aircraft Design and Research Institute Shanghai201210 China

In this paper, we first introduce the necessity, history, and classification of stability and control augmentation systems. The structure of the lateral-directional stability and control augmentation control system in the normal mode is studied, and a comparison of advantages and disadvantages of several design schemes including yawing rate feedback, rolling rate feedback, and sideslip angle feedback is given. Lateral-directional stability and control augmentation control law for a certain type of civil aircraft simulator is designed. Finally, the stability and control augmentation system is simulated and the simulation results are analyzed, which shows that the handling qualities of the aircraft with stability and control augmentation system are better than those without it. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Flight simulators

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SIMULATION RESEARCH FOR FLAP SKEW ON A CERTAIN TYPE OF aircraft

SIMULATION RESEARCH FOR FLAP SKEW ON A CERTAIN TYPE OF AIRCR...

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

作者： Wang, Xianyu State Key Laboratory of Airliner Integration Technology and Flight Simulation COMAC Shanghai Aircraft Design and Research Institute Shanghai China

This paper describes the different kinds of flap skew malfunctions and principles of flap skew sensor monitoring on an aircraft. Taking a certain type of aircraft as an example, a flap system model is established by Simulink platform. Based on this model, the skew malfunctions can be simulated. The simulation results show that the established flap system model is effective, which lays a foundation for further research. © The Institution of Engineering & technology 2024.

关键词： Flight simulators

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Measurement uncertainty of vertical combustion test of civil aircraft interior materials 2

Measurement uncertainty of vertical combustion test of civil...

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2023 2nd International Conference on Aerospace and control Engineering, ICoACE 2023

作者： Wu, Shuang State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai Aircraft Design and Research Institute Shanghai200000 China

The civil cabin interior materials vertical combustion test is the necessary test to verify the flame retardancy ability of the floor coverings, textiles, seat cushions and cushions. It is an inspection step required for cabin interior materials before installation, which is of great significance for the safe flight of civil aircraft. During the experiment process, variable factors such as personnel and equipment are highly likely to impact the test results. To ensure the reliability of test results, it is necessary to summarize and evaluate the factors that may affect the results of the test process. Thus, in this paper, the test method, measurement model, and sources of measurement uncertainty have been analysed, and the calculation case of experimental measurement uncertainty has been introduced. © Published under licence by IOP Publishing Ltd.

关键词： Combustion

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Test research for flap skew on iron bird on a certain type of aircraft

Test research for flap skew on iron bird on a certain type o...

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

作者： Wang, Xianyu State Key Laboratory of Airliner Integration Technology and Flight Simulation COMAC Shanghai Aircraft Design and Research Institute Shanghai China

This paper focuses on the flap skew test under the ground-based laboratory environment on the iron bird, taking a certain type of aircraft as an example to introduce the environment and skew malfunction principles about the flap skew test on aircraft. The mechanical devices used to simulate flap skew malfunction and recover flap skew malfunction are designed and applied in the ground simulation test of a certain type of aircraft. According to the results, the designed mechanism can be proved to be used normally and can carry out the flap skew test successfully. © The Institution of Engineering & technology 2024.

关键词： Iron research

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