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Design and Implementation of Generator Drive Characteristics simulation Device for Civil aircraft 8

Design and Implementation of Generator Drive Characteristics...

引用

8th International Conference on Electrical, Mechanical and Computer Engineering, ICEMCE 2024

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

ISBN: (纸本)9798331506230

According to ground laboratory airworthiness verification test requirements of the civil aircraft electrical power system in CCAR25, it is necessary to simulate the drive characteristics of the aircraft power unit to the generator. In this paper, a generator drive characteristics simulation device is designed to meet this requirement. According to the requirements of steady state speed control accuracy and dynamic response characteristics, which have an important impact on the simulation of drive characteristics, the core functional modules of the device have been designed and implemented in detail, and the device is applied to the ground laboratory airworthiness verification test of the civil aircraft power system. The tests showed that the device has excellent drive characteristics, as well as the advantage of simple structure. © 2024 IEEE.

关键词： aircraft power systems

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Design and implementation of main generator multifunctional ground test device for civil aircraft 3

Design and implementation of main generator multifunctional ...

引用

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...

引用

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...

引用

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...

引用

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...

引用

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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Design and implementation of wheel speed simulation system for civil aircraft 4

Design and implementation of wheel speed simulation system f...

引用

2024 4th International Conference on Measurement Control and Instrumentation, MCAI 2024

作者： Li, Xuesong State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai China

In the ground simulation test of civil aircraft braking systems, a number of functional, performance, and fault tests need to be carried out, and wheel speed is an important input parameter of the brake control box in the test. To meet the demand of the aircraft to provide wheel speed to the brake control box, a wheel speed simulation system was developed in this paper. The system can simulate the wheel speed state of the aircraft when the aircraft is sliding and braking, and transmit the wheel speed signal to the brake control box, which features portability and versatility, and the system is reliable and stable, which well meets the test needs of the brake system. © Published under licence by IOP Publishing Ltd.

关键词： aircraft control

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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...

引用

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

Lateral-directional stability and control augmentation syste...

引用

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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Longitudinal SCAS design and simulation for civil aircraft simulator

Longitudinal SCAS design and simulation for civil aircraft s...

引用

2024 International Conference on Aerospace and Mechanics, ICAM 2024

作者： Xie, Gangtao Qu, Xiaoyu Chen, Lei Shanghai Aircraft Design and Research Institute Commercial Aircraft Corporation of China Ltd. Shanghai China State Key Laboratory of Aircraft Systems Integration Technology and Flight Simulation Shanghai China

In this paper, the principle and benefits of stability and control augmentation system (SCAS) are introduced. Four schemes of the longitudinal SCAS for civil aircraft in normal mode are analyzed and compared. One of them, i.e., C * response type, is selected. Its architecture is determined. Then, based on a typical civil aircraft, the flight control law of the longitudinal SCAS is designed. A simulation model of the longitudinal SCAS is established through MATLAB software. Finally, the simulation and verification of the longitudinal SCAS model is carried out. The simulation results show that the designed longitudinal SCAS is feasible and can be applied to engineering practice. Compared with either normal load or pitch rate command response type, with proportional and integral feedback for mixed control signals of pitch rate and normal load, C * not only improves the short period characteristics but also effectively separates phugoid and short period frequencies, thus achieving high control accuracy. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： MATLAB

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