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检索条件"机构=Key Laboratory of Aircraft Control Integration Technology"

共 1017 条记录，以下是31-40 订阅

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RESEARCH ON REAL TIME SIMULATION integration AND PLATFORM EVALUATION OF MULTI SOURCE HETEROGENEOUS MODELS FOR aircraft

RESEARCH ON REAL TIME SIMULATION INTEGRATION AND PLATFORM EV...

引用

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

作者： Chen, Li Li, Linwen Wang, Hongxin Xie, Dianhuang COMAC Shanghai Aircraft Design and Research Institute Shanghai China State Key Laboratory of Airliner Integration Technology and Flight Simulation China

In response to the demand for full aircraft virtual integration simulation in the development process of civil aircraft, this paper proposes a real-time simulation integration and platform evaluation method for multi source heterogeneous models of the entire aircraft system. This method converts different forms of multi source heterogeneous models of the entire aircraft into executable real-time simulation code. The real-time simulation code is loaded into different real-time simulation nodes, combined with human-computer interaction systems, comprehensive control systems, and display systems to form a distributed real-time simulation platform for full aircraft virtual integration. Model evaluation and platform evaluation work are carried out on the integration platform, and the maturity of the integration platform is confirmed based on experimental requirements. Ensure that the integrated platform has the ability to conduct virtual simulation experiments. This technology can support real-time simulation testing of full aircraft virtual integration during the initial design stage of civil aircraft development, and support confirmation of aircraft level functional and safety requirements. © The Institution of Engineering & technology 2024.

关键词： Ability testing

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STUDY ON THE IMPACT OF APU INLET DOOR ANGLE ON AERODYNAMIC PERFORMANCE OF INLET SYSTEM

STUDY ON THE IMPACT OF APU INLET DOOR ANGLE ON AERODYNAMIC P...

引用

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

作者： Zhu, Ting Zhou, Chengsi Wang, Runzhou Sha, Jingtian Wang, Han Chen, Yaxin Shanghai Aircraft Design and Research Institute Shanghai China State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai China

The Auxiliary Power Unit (APU) of civil aircraft primarily provides generator shaft power for the electrical system and bleed air for the air source system both on the ground and in the air. The APU inlet system draws airflow from outside the fuselage through inlet duct and ventilation cooling duct, supplying the APU with the required airflow under various operating conditions and ensuring proper ventilation and cooling of the compartment. The inlet system also aims to minimize pressure loss and inlet distortion at the APU's entrance. This study uses numerical simulation to study the impact of APU inlet door angle on aerodynamic performance of inlet system. The results show that within the study range, under the flight condition,the total pressure recovery coefficient and the ram recovery coefficient of the APU inlet duct outlet first increase and then decrease with increasing inlet door angle,reaching maximum values at door angle of 40°;under the ground condition, the total pressure recovery coefficient of the APU inlet duct outlet continuously increase with larger door angles;The inlet door angle has no significant regular impact on the magnitude of APU inlet distortion. © The Institution of Engineering & technology 2024.

关键词： Ventilation ducts

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Research on real time simulation test method of civil aircraft ground deceleration requirements validation

Research on real time simulation test method of civil aircra...

引用

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

作者： Chen, Li Li, Linwen Xie, Dianhuang Wang, Hongxin COMAC Shanghai Aircraft Design & Research Institute Shanghai China State Key Laboratory of Airliner Integration Technology and Flight Simulation China

In view of the requirements of ground deceleration functional requirements and safety requirements validation during civil aircraft design, an automated ground deceleration test method based on distributed real-time simulation is proposed, which takes the functional logic model of ground deceleration related systems as the test infrastructure, develops test cases based on key parameters of ground deceleration requirements, develops automated test models and fault injection models based on test cases, and integrates automated test models, fault injection models and related system models to conduct distributed real-time simulation tests. The technology digitizes key parameters that need to be confirmed in ground deceleration requirements, effectively covers the scope of requirements confirmation by arranging combined parameter development test cases, simplifies the process of testing and requirements confirmation in the form of automated simulation testing, and efficiently supports aircraft ground deceleration requirements confirmation efforts. © The Institution of Engineering & technology 2024.

关键词： Automatic testing

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A Novel Battery RUL Prediction Approach Based on Probabilistic Hyperparameter Optimization 16

A Novel Battery RUL Prediction Approach Based on Probabilist...

引用

16th IEEE PES Asia-Pacific Power and Energy Engineering Conference, APPEEC 2024

作者： Wang, Ziqi He, Hongwen Zhao, Xuyang Gong, Sikai Zhou, Zhiqiang Beijing Institute of Technology National Engineering Laboratory for Electric Vehicles National Key Laboratory of Advanced Vehicle Integration and Control Beijing China

ISBN: (纸本)9798350386127

The remaining useful life (RUL) of lithium-ion batteries, a pivotal metric for assessing battery performance and service life, is not amenable to direct measurement. To refine the precision of estimating the remaining useful lifespan for battery systems, this paper proposes a prediction method based on the Bayesian optimization algorithm for Long Short-Term Memory (LSTM) and Gated Recurrent Unit (GRU) neural networks. The research utilized the battery dataset provided by the MIT Stanford Toyota Research Institute. The method first preprocesses the battery data, selecting key health indicators (HI) through the Pearson correlation coefficient, and then estimates the RUL of the battery using LSTM and GRU networks. In order to augment the efficacy of the RUL estimation model, this paper applies Bayesian optimization technology to determine the optimal hyperparameters, thereby saving time required for model prediction. © 2024 IEEE.

关键词： Long short-term memory

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Structural non-reciprocity study of optical systems for RFOGs driven by broad-spectrum light sources

Structural non-reciprocity study of optical systems for RFOG...

引用

2024 International Conference on Optoelectronic Information and Optical Engineering, OIOE 2024

作者： Su, Zhengcheng Yan, Bo Li, Jun Lan, Shiqi National Key Laboratory of Science and Technology on Aircraft Control Flight Automatic Control Research Institute Shaanxi Xi’an710076 China

ISBN: (数字)9781510680470

ISBN: (纸本)9781510680463

Aiming at the structural asymmetry problem caused by the inconsistency of the two optical fibers connecting the Y waveguide and the resonant cavity in the RFOG optical system driven by a broad-spectrum light source, a study on the non-reciprocity of the optical structure of the RFOG driven by a broad-spectrum light source was carried out. A model of the optical system structure non-reciprocity is established, and the effect of the optical system structure non-reciprocity on the gyroscope system in a variable temperature environment is analyzed. The results show that the optical system structure non-reciprocity causes the gyro sweep mode curve to change, but does not affect the system accuracy when there is no temperature change, and the temperature characteristics of the optical system structure non-reciprocity lead to pseudo-rotational speed output of the gyro output in a variable temperature environment, which is strongly correlated with the length difference and the rate of change of temperature. © 2024 SPIE.

关键词： Light sources

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EXPERIMENTAL RESEARCH ON THERMAL CHARACTERISTICS OF THE HEATER VALVE IN CIVIL aircraft HYDRAULIC SYSTEM

EXPERIMENTAL RESEARCH ON THERMAL CHARACTERISTICS OF THE HEAT...

引用

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

作者： Hu, Jianwei Luo, Zhang Liu, Qiang State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai Aircraft Design and Research Institute Shanghai China Shanghai Aircraft Design and Research Institute Shanghai China

In response to the long warm-up time of hydraulic systems in large aircraft in low-temperature environments and the significant impact of low-temperature environments on the pipelines terminal, this paper conducts theoretical research on heater valve of the hydraulic components and establishes a thermodynamic model for heater valve. Experimental studies on the thermal characteristics of heater valve have been conducted to understand the pressure variation, heating characteristics, operating conditions, and the performance of heater valve, providing experimental data support for the architectural design of hydraulic systems and the selection of heater valve for large aircraft. © The Institution of Engineering & technology 2024.

关键词： aircraft hydraulic systems

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Research on Calculation Method of Constant Voltage and Constant Frequency Starting Voltage Base on Brushless DC Motor Without Position Sensor 7th

Research on Calculation Method of Constant Voltage and Const...

引用

7th China Aeronautical Science and technology Conference, CASTC 2024

作者： Xue, Mizi Shanghai Aircraft Design and Research Institute Shanghai201210 China State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai200126 China

ISBN: (纸本)9789819797738

This paper analyzes the constant voltage and constant frequency starting method in detail, gives a detailed introduction to the constant voltage and constant frequency starting voltage and phase change frequency of the brushless DC motor with a 120° trapezoidal waveform of the back electromotive force, and analyzes the basic principle of constant voltage and constant frequency starting and the conditions that need to be met for realizing accelerated phase change. Combined with the mathematical model of the motor and the mechanical equations of motion, the motor is analyzed for each phase change of the renewed current phase and the conduction phase, and the calculation method of the constant voltage and constant frequency starting voltage range is deduced and the basis for determining the phase change frequency is given. The rotor motion equations and speed change equations are verified through simulation and compared with the actual rotor position and speed magnitude to verify the accuracy of the calculation results of constant voltage and constant frequency starting voltage and phase change frequency. © Chinese Society of Aeronautics and Astronautics 2025.

关键词： Brushless DC motors

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Nose landing gear strength test strain gauge vs FEA correlation

Nose landing gear strength test strain gauge vs FEA correlat...

引用

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

作者： Xu, Wenmin Cao, Shixu Chen, Wenjie Yang, Shangxin State Key Laboratory of Airliner Integration Technology and Flight Simulation Shanghai China COMAC Shanghai Aircraft Design & Research Institute Shanghai China

This article conducts finite element modeling analysis on the nose landing gear, and calculates and analyzes several severe load conditions. Strength tests were conducted on the nose landing gear to verify that the static strength of the landing gear meets the requirements. By comparing the strength test and finite element analysis results of the landing gear, it is shown that the analysis and test results are within the tolerance range, indicating that the finite element analysis and results are reliable and can be used for subsequent analysis. © The Institution of Engineering & technology 2024.

关键词： Strain gages

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AN IMMERSIVE SUBJECTIVE EVALUATION METHOD FOR THE SOUND QUALITY IN CIVIL aircraft CABINS

AN IMMERSIVE SUBJECTIVE EVALUATION METHOD FOR THE SOUND QUAL...

引用

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

作者： Hu, Haifeng Dai, Zheng Zhao, Yi Wang, Yudi Meng, Lingda COMAC Shanghai Aircraft Design & Research Institute Shanghai China State Key Laboratory' of Airliner Integration Technology and Flight Simulation Shanghai China

The sound quality and comfort inside civil aircraft cabins have gradually become a key factor affecting their market competitiveness. Optimizing the cabin noise environment and improving comfort are of great significance. This article is based on a simulated three-dimensional sound field environment inside an aircraft engineering prototype, selecting eight seats and using the grade scoring method to conduct subjective evaluation tests on the sound quality of a certain type of test aircraft under six operating conditions, including ground taxiing, takeoff, cruising, and so on. After excluding irrelevant results, accurate subjective evaluation results for each seat and working condition are obtained. © The Institution of Engineering & technology 2024.

关键词： Cabins (aircraft)

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Research on testing method for damping loss factor of non self supporting materials

Research on testing method for damping loss factor of non se...

引用

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

作者： Hu, Haifeng Dai, Zheng COMAC Shanghai Aircraft Design & Research Institute Shanghai China State Key Laboratory' of Airliner Integration Technology and Flight Simulation Shanghai China

Based on the differences between time-domained and frequency-domained methods, this article proposes an combined testing method for the DLF of non self-supporting materials by using the Oberst beam method. That is, at low frequencies or small damping frequency points, use the DLF of the composite beam, which is obtained from the time-domained method, to replace the results from the frequency-domained method, then the loss factor of non self-supporting damping materials can be calculated. And it was applied to test the DLF of a certain rubber material, successfully obtaining damping results at four modal frequency points. © The Institution of Engineering & technology 2024.

关键词： Damping

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