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检索条件"机构=Aviation Key Laboratory of Science and Technology on Aero Utility System Integration"

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Commercial aircraft distribution network reconfiguration based on power priority

Commercial aircraft distribution network reconfiguration bas...

引用

IEEE Annual Southern Power Electronics Conference (SPEC)

作者： Binxin Tang Shanshui Yang Li Wang Huijuan Zhang Dept. Electrical Engineering Nanjing University of Aeronautics and Astronautics Nanjing China Dept. Electrical Engineering Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China

ISBN: (纸本)9781509015474

Network reconfiguration is the key technology to realize the autonomous operation and safety enhancement in aircraft power distribution system. The goal of reconfiguration is to achieve maximal power supply under different fault conditions. This paper proposes a power priority based reconfiguration algorithm. To verify the validity of the algorithm, an aircraft power distribution system is discussed. Experimental results are given to verify the validity of the algorithm.

关键词： Aircraft Power supplies Aircraft propulsion aerospace electronics Power distribution aerospace control

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Investigation into influence factors of synchronous movement of multi-cylinders

Investigation into influence factors of synchronous movement...

引用

IEEE International Conference on Aircraft utility systems (AUS)

作者： Chao Hu Pengfei Zhang Xiaoping Ouyang Houtao Ku Qinghe Zhou Enxiao Zhang State Key Lab. of Fluid Power Transmission and Control Zhejiang University Hangzhou China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China The High School Attached to Zhejiang University Hangzhou China

ISBN: (纸本)9781509010882

Seal is one of the most important characteristics for cylinders and suitable seal configuration will guarantee the long life cycle of the seal and the cylinder. Experiment is the only way which can demonstrate the best seal configuration in applications. In this paper, one approach is brought forward for testing the seal performance of cylinders with different seals configurations at the same load working condition for saving the test time. In the test-rig, the synchronization of cylinders is one of the key technologies. The test system is modelled in the AMESim software. The effect caused by the changes of the different physical parameters is analyzed, such as load stiffness, viscous damping coefficient of cylinder, dead volume of cylinder and internal leakage coefficient. The experiment is carried out and test results agree with the simulation results. Finally, the appropriate solution is proposed for improving the synchronization of the multi-cylinders further.

关键词： Synchronization Valves Seals Damping Load modeling Springs Servomotors

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Investigation into Influence Factors of synchronous movement of Multi-cylinders

Investigation into Influence Factors of synchronous movement...

引用

2016 IEEE/CSAA International Conference on Aircraft utility systems(AUS)

作者： Chao Hu Pengfei Zhang Xiaoping Ouyang Houtao Ku Qinghe Zhou Enxiao Zhang State Key Lab.of Fluid Power Transmission and Control Zhejiang University Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration State Key Lab.of Fluid Power Transmission and Control Zhejiang Univ. The High School Attached to Zhejiang University

Seal is one of the most important characteristics for cylinders and suitable seal configuration will guarantee the long life cycle of the seal and the *** is the only way which can demonstrate the best seal configuration in *** this paper,one approach is brought forward for testing the seal performance of cylinders with different seals configurations at the same load working condition for saving the test *** the test-rig,the synchronization of cylinders is one of the key *** test system is modelled in the AMESim *** effect caused by the changes of the different physical parameters is analyzed,such as load stiffness,viscous damping coefficient of cylinder,dead volume of cylinder and internal leakage *** experiment is carried out and test results agree with the simulation ***,the appropriate solution is proposed for improving the synchronization of the multi-cylinders further.

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Modeling and simulation of aircraft power supply system based on Dymola and Modelica

Modeling and simulation of aircraft power supply system base...

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International Conference on Electrical systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC)

作者： Bingjie Li Weilin Li Xiaobin Zhang Jiuan Gao Xiyang Zhao Jiao Wang Chao Zhang School of Automation Northwestern Polytechnical University Xi'an Shaanxi China Aviation Key Laboratory of Science and Technology on Aerospace Power System Shaanxi Aero Electric Co. Ltd Shaanxi China

ISBN: (纸本)9781509008155

The use of power electronic devices in more electric aircraft is pervasive, thus higher requirements of power quality have been proposed in the aircraft. Moreover, the protection and control logic of the aircraft power supply system plays an important role in aircraft systematic design, which may influence reliability, redundancy and fault tolerance. Considering the multi-domain characteristics of the more electric aircraft, which consists of electrical, mechanical, hydraulic, and magnetic subsystems, integrated simulation is an effective way to find problems to support effective design of aircraft power supply system. In this paper, Dymola software is adopted to simulate the aircraft power supply systems, to be more precise, the model is built by Modelica language or visual components. The obtained simulation results can be used as reference for designing of aircraft power supply system.

关键词： Mathematical model Atmospheric modeling Aircraft Power supplies Integrated circuit modeling Generators Rectifiers

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FMI based multi-domain modeling and simulation for extraction and retraction of EHA nose landing gear in Dymola

FMI based multi-domain modeling and simulation for extractio...

引用

International Conference on Electrical systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC)

作者： Beilei Yang Xiaohua Wu Weilin Li Xiyang Zhao Jiuan Gao Yang Yang NPU-Dassault Systems Dymola Innovation Center Northwestern Polytechnical University Xi'an Shaanxi China Aviation Key Laboratory of Science and Technology on Aerospace Power System Shaanxi Aero Electric Co. Ltd Shaanxi China

ISBN: (纸本)9781509008155

The Electro-Hydrostatic Actuation (EHA) nose landing gear system is a complex multi-domain system. in order to study the coupling characteristics of EHA system, a multi-domain simulation tool is needed. In this paper, a EHA block diagram based on extraction and retraction of nose landing gear is described and established from the mathematic model, and then completed the modeling and simulation of EHA system in Dymola. A controller of EHA system is exported as the Functional Mock-up Unit (FMU) model from Simulink to Dymola according to the Functional Mock-up Interface (FMI) standard.

关键词： Mathematical model Standards Actuators Load modeling Data models Software packages Brushless DC motors

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Digital Generator Control Unit for a Variable Frequency Synchronous Generator

Digital Generator Control Unit for a Variable Frequency Sync...

引用

International Conference on Electrical Machines and systems

作者： Jing Li Jiuan Gao Yang Yang Chao Zhang Weilin Li Xiaobin Zhang Department of Electrical Engineering College of Automation Northwestern Polytechnical University Shanxi China Aviation Key Laboratory of Science and Technology on Aerospace Power System Shaanxi Aero Electric Co. Ltd Shaanxi China

ISBN: (纸本)9781467388634

A new generator control unit (GCU) must be designed to work in a wide frequency range in order to obtain better control performance in variable frequency AC power system. Control algorithms make improvements in terms of determining the control parameters and analyze the influence of the controller parameters on system stability, and compensate for the loss of signals generated in the conditioning process. This paper compares the pros and cons of different RMS algorithms and determine the final RMS calculation scheme. Test results show a considerable performance improvement for the proposed design in dynamic performance and adjustment precision.

关键词： Digital control synchronous generator excitation voltage control

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Modelling and Simulation of a Novel Dual-Redundancy Electro-Hydrostatic Actuator

Modelling and Simulation of a Novel Dual-Redundancy Electro-...

引用

2015 International Conference on Fluid Power and Mechatronics

作者： Haitao QI Yating TENG Zilong LIU Xi XIAO Tigao LEI Engineering Training Center Beihang University School of Mechanical Engineering and Automation Beihang University Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Engineering Institute of Aircraft Systems

The proposed paper deals with the problem of modelling and simulation of a dual-redundancy ElectroHydrostatic Actuator(DREHA) by the way of co-simulation based on AMESim and MATLAB. With the development of More Electric Aircraft(MEA) technology, integrated Power-byWire(PBW) actuator will be used in the airborne actuation system. As an important PBW actuation system, EHA has virtues of high efficiency, little heat generation, easy structure integration design, effortless parallel redundancy design, convenient power distribution and management, few installation restriction, control-configured layout, and expediently implementing lock and isolation, which are more suitable to the actual technology development level and airborne requirements. The research of DREHA has a vital significance to improve the reliability of its use in aircraft. The schematic of a novel DREHA are firstly given based on the existing fault tolerant EHA architectures, and its principle is analyzed in detail. Then, build the model of control and motor part in MATLAB, and the model of hydraulic part in AMESim. Analyze the operating modes of DREHA, including active/active and active/passive mode. Finally, co-simulate the dynamic response and operating modes of DREHA based on AMESim and MATLAB. The simulation results show that this new DREHA has the ability of no performance degradation after the first failure and safe after the second failure.

关键词： Electro-Hydrostatic Actuator dual-redundancy modelling simulation

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Temperature control of permanent-magnet synchronous motor using phase change material

Temperature control of permanent-magnet synchronous motor us...

引用

IEEE/ASME (AIM) International Conference on Advanced Intelligent Mechatronics

作者： Shengnan Wang Yun-Ze Li Yang Liu Hang Zhou Yunhua Li Wei Guo Xi Xiao School of Automation Science and Electrical Engineering Beihang University Beijing China School of Aeronautics Science and Engineering Beihang University Beijing China Aviation key laboratory of science and technology on aero electromechanical system integration China aviation industry Jincheng Nanjing electrical and hydraulic engineering research center Nanjing China

ISBN: (纸本)9781467391085

This paper presents a design of a permanent-magnet synchronous motor (PMSM) casing with organic phase change material (PCM), paraffin, stuffing to absorb and store the heat produced by the motor so as to prevent the motor temperature from sharp increase or decrease, and more important to avoid the motor from overheating. The paraffin is filled in the hollow motor casing on which some cavities are made specially and no complicated water-cooling or fan units are needed for the motor cooling. Mathematical models are established. Temperature variation curves of motor casings with different structure parameters and different types of paraffin are simulated on several motor operating duty cycles to observe the temperature control effectiveness of this method. Results demonstrate that the temperature of the casing could be controlled around a certain value depending on the melting temperature of the sufficient paraffin filled in the casing whose re-solidification time should be long enough in every operating period of the motor. Thus, the temperature-rise of the PMSM with paraffin casing can be controlled into a smaller range (around 55K if the melting temperature of the paraffin is 353.15K with the initial value of 298.15K) compared with that of the same size casing without paraffin (ranged from 41.491K to 71.346K). At the same time, the continuous operating time of the PMSM can be extended much longer with a PCM filled casing.

关键词： Heating Phase change materials Synchronous motors Mathematical model Transient analysis Induction motors

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Modelling and simulation of a novel dual-redundancy electro-hydrostatic actuator

Modelling and simulation of a novel dual-redundancy electro-...

引用

International Conference on Fluid Power and Mechatronics (FPM)

作者： Haitao Qi Yating Teng Zilong Liu Xi Xiao Tigao Lei Engineering Training Center Beihang University Beijing China School of Mechanical Engineering and Automation Beihang University Beijing China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Engineering Institute of Aircraft Systems Nanjing China

ISBN: (纸本)9781479987719

The proposed paper deals with the problem of modelling and simulation of a dual-redundancy Electro-Hydrostatic Actuator (DREHA) by the way of co-simulation based on AMESim and MATLAB. With the development of More Electric Aircraft (MEA) technology, integrated Power-by-Wire (PBW) actuator will be used in the airborne actuation system. As an important PBW actuation system, EHA has virtues of high efficiency, little heat generation, easy structure integration design, effortless parallel redundancy design, convenient power distribution and management, few installation restriction, control-configured layout, and expediently implementing lock and isolation, which are more suitable to the actual technology development level and airborne requirements. The research of DREHA has a vital significance to improve the reliability of its use in aircraft. The schematic of a novel DREHA are firstly given based on the existing fault tolerant EHA architectures, and its principle is analyzed in detail. Then, build the model of control and motor part in MATLAB, and the model of hydraulic part in AMESim. Analyze the operating modes of DREHA, including active/active and active/passive mode. Finally, co-simulate the dynamic response and operating modes of DREHA based on AMESim and MATLAB. The simulation results show that this new DREHA has the ability of no performance degradation after the first failure and safe after the second failure.

关键词： Mathematical model Valves Switches MATLAB Actuators Integrated circuit modeling

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Experimental study on impact of installation angle on heat transfer performance of spray cooling

Experimental study on impact of installation angle on heat t...

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2014 International Conference on Logistics Engineering, Management and Computer science, LEMCS 2014

作者： Pang, Liping Jin, Shicheng Yu, Zhang Liu, Zhixuan Ji, Yibin School of Aviation Science and Engineering Beijing University of Aeronautics and Astronautics Beijing China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China

ISBN: (纸本)9789462520103

The spray cooling technology has great advantage in high heat flux removal. Because the heat transfer of spray cooling has much to do with the heater surface temperature, it is important to ensure that the entire heating surface temperature is in an effective operating range. Otherwise, excessive local temperature may threaten the normal operation of spray cooling. In this paper, experimental method was used to investigate the effect of installation angle of spray cooling on the heat transfer performance. The five installation angles tested in this study were 0°, 45°, 90°, 135° and 180°. Other experimental parameters remain constant, such as the flow rate, the spray height and the spray pressure. The results show the heat flux as a function of surface temperature with various installation angles in a graphical format. © 2014. The authors - Published by Atlantis Press.

关键词： Atmospheric temperature

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