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International Conference on Electrical Machines and systems (ICEMS)

作者： Yiyan Wang Zhao Xue Xiaoli Duan Yilun Liu Guangzhao Luo School of Automation Northwestern Polytechnical University Xi’an China Beijing Institute of Precision Mechatronics and Controls Beijing China Key Laboratory of Aviation Science and Technology on Aerospace Power System Shaanxi Aero Electric Co.Ltd Xi’an China

ISBN: (纸本)9781728133997

An adaptive filter is used as the speed loop controller for permanent magnet synchronous motor (PMSM) drive system to improve the dynamic and anti-disturbance performance. The weightings of the filter are adjusted by the normalized least mean square (NLMS) filtering algorithm, so that the transfer function of the controller is equivalent to the inverse model of the controlled plant in the system. At the same time, the weightings of the filter are transferred to the speed feedforward controller in time, which makes the transfer function can approximate to the inverse model of the controlled plant. Then, the feedforward control and speed tracking are realized. In addition, a second-order extended state observer (ESO) is designed to estimate and compensate the total disturbances of the system. Simulation results verify the effectiveness of the proposed method.

关键词： Adaptive filters Feedforward systems Filtering algorithms Adaptation models Control systems Transfer functions Adaptive systems

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Burst analysis of the aircraft bootstrap reservoir

Burst analysis of the aircraft bootstrap reservoir

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CSAA/IET International Conference on Aircraft Utility systems (AUS 2018)

作者： Heran Zhang Junya Yin Xiaoping Ouyang Pengfei Zhang State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang University Zheda Road 38 310027 Hangzhou China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Aviation Industry Corporation of China Shuige Road 33 211106 Nanjing China

ISBN: (纸本)9781510872745

As a key component of the aircraft hydraulic system, the bootstrap reservoir can guarantee good self-priming of the pump at high rotation speed. This study provides the basic structure and working principle of the bootstrap reservoir. This paper analyzes the causes and characteristics of the reservoir burst. Through the co-simulation of AMESim and ANSYS workbench, the influence of the hydraulic impact on reservoir burst was observed, and the dangerous part where the bursting occurred was the piston rod.

关键词： Bootstrap Reservoir Self-priming Burst AMESim ANSYS

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Numerical investigation of influence of structure and operating parameters on performance of vortex oil filter

Numerical investigation of influence of structure and operat...

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CSAA/IET International Conference on Aircraft Utility systems (AUS 2018)

作者： Wang Ning Chen Weijian Ning Guoli Ma Hui Key Laboratory of Aircraft Environment Control and Life Support MIIT Nanjing University of Aeronautics & Astronautics Nanjing P.R. China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing P.R. China

ISBN: (纸本)9781510872745

In this paper, the three-dimensional numerical simulation of solid-liquid two-phase flow in a vortex oil filter is performed by means of numerical simulation. The Reynolds stress turbulence model is used in the simulation flow field, and the DPM model is used for solid particle tracking. The influence of key structural parameters and operating parameters on the filtering effect was mainly studied, such as the inlet width, the size of the overflow pipe, the wall thickness and the insertion depth, the size of the cone angle and the length of the cone end. The results provide the basis for the rational design of the vortex oil filter.

关键词： Vortex oil filter Solid-liquid separation Turbulence model Numerical simulation

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Research on the Flow Performance of Airborne Flame Arrestor

Research on the Flow Performance of Airborne Flame Arrestor

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CSAA/IET International Conference on Aircraft Utility systems

作者： Wang Yangyang Liu Wenyi Pan Jun Wang Lu Fuel System Department Nanjing Engineering Institute of Aircraft Systems AVIC The Aviation Electromechanical System Integration of Aviation Science and Technology Key Laboratory Deparatment of Technology Development Management and IT Nanjing Engineering Institute of Aircraft Systems AVIC

ISBN: (纸本)9781510872745

Airborne flame arrestor, which can effectively prevent flame propagation and spread so as to earn more evacuating time for passengers and crew, has been widely applied in aircraft ventilation system. In this paper, five main forms of flame arrestor element are discussed and their advantages and disadvantages are analyzed. Flow performance of these elements is calculated. The results show that the flow performance of crimped ribbon, metallic honeycombs and Cellular ceramics types are better than that of parallel plate and perforated sheet.

关键词： Flame arrestor Flow performance Element Free area

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The analysis of multi-cylinder synchronization in the load simulation system for reciprocating seals

The analysis of multi-cylinder synchronization in the load s...

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CSAA/IET International Conference on Aircraft Utility systems (AUS 2018)

作者： Shengrong Guo Pengfei Zhang Qinghe Zhou Dechen Sun Houtao Ku Chao Peng Xiaoping Ouyang Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Engineering Institute of Aircraft System Shuige Road 33211106 Nanjing China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang University Zheda Road 38 310027 Hangzhou China

ISBN: (纸本)9781510872745

The load simulation system is a subsystem of the reciprocating sealing test system, to evaluate the working life of the aircraft actuator's sealing components. In this paper, a synchronization controller based on bias coupling is developed to study the control characteristics of the multi-cylinder synchronization under the control of one servo valve. The dynamic model of the load is established and verified by simulations and experiments. The influences of friction, load, and etc. on the synchronization are also analyzed. And the results indicated that synchronization error can be effectively reduced using the controller, besides great cost savings.

关键词： Load simulation system One servo valve controlling parallel multi-cylinders Multi-cylinder synchronization Co-simulation Experimental verification

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Performance Evaluation Methods for Multi-stream Plate-Fin Heat Exchanger

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Transactions of Nanjing University of aeronautics and Astronautics 2017年第5期34卷 553-560页

作者： Li Jun Wang Yu Jiang Yanlong Shi Hong Zheng Wenyuan School of Environmental Science and Engineering Suzhou University of Science and Technology Suzhou 215009 P. R. China College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing 210016 P. R. China

Mathematical model of cross type multi-stream plate-fin heat exchanger is ***,mean square error of accumulative heat load is normalized by dimensionless,and the equations of temperature-difference uniformity factor are *** factors above and performance of heat exchanger are compared and analyzed by taking aircraft three-stream condenser as an *** results demonstrate that the mean square error of accumulative heat load is common result of total heat load and excess heat load between *** it can be influenced by passage arrangement,flow inlet parameters as well as flow *** parameter of mean square error of accumulative heat load can reflect the influence of passage arrangement to heat exchange performance and will not change dramatically with the variation of flow inlet parameters and flow ***-difference uniformity factor is influenced by passage arrangement and flow *** remains basically unchanged under a certain range of flow inlet parameters.

关键词： multi-stream plate-fin heat exchanger mean square error of accumulative heat load temperature-difference uniformity factor performance evaluation

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Study on the method of thermal prediction for electronic wing pod cabin 43

Study on the method of thermal prediction for electronic win...

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43rd Annual Conference of the IEEE Industrial Electronics Society, IECON 2017

作者： Chao, Yang Liping, Pang Jun, Wang Yue, Zhou Hongquan, Qu School of Aviation Science and Engineering Beihang University Beijing100191 China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing211102 China College of Information Engineering North China University of Technology Beijing100144 China

ISBN: (纸本)9781538611272

For airborne electronic equipment, temperature is the most important factor affecting its performance, so it is very important to invest its dynamic temperature response process in a flight environment. By analyzing the heat exchange relationship between different devices in an electronic wing pod cabin, a temperature prediction method for electronic pod cabin based on the Random Vector Functional Link (RVFL) neural network is proposed in this paper. This method can complete a construction of prediction model using small amount of data. Hence it can realize a quick temperature response prediction only with the initial temperature values, and ensure relative high prediction accuracy. © 2017 IEEE.

关键词： Forecasting

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integration schemes for heat sink of the airborne environmental control and thermal management system

Integration schemes for heat sink of the airborne environmen...

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CSAA/IET International Conference on Aircraft Utility systems (AUS 2018)

作者： Xiaoming Wang Sujun Dong Zheng Liu Aicheng Li Fanxin Meng School of Aeronautic Science and Engineering Beihang University Beijing China Aviation Key Laborary of Science and Technology on Aero Electro Mechanical System Integration Nanjing Engineering Institute of Aircraft Systems AVIC

ISBN: (纸本)9781510872745

As the aeronautical armament is developing to the direction of faster speed, higher stealth and equipped with high-energy weapons, the heat sink design of the airborne environmental control and thermal management system (ECTMS) faces great challenges. Based on practical applications, the integrated design idea and three novel integration schemes that combine the heat release of the ECTMS respectively with the engine inlet, the engine bypass and the fuselage skin are proposed, as well as their detailed structure and manufacturing technology. These integration schemes not only avoid using ram air, but also meet the high demand for huge heat release and ensure the aircraft's overall performance reach the international advanced level.

关键词： Integrated design Heat sink Environmental control system Thermal management system Aircraft

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Study on sampling method for performance curve of centrifugal compressor

Study on sampling method for performance curve of centrifuga...

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CSAA/IET International Conference on Aircraft Utility systems (AUS 2018)

作者： Zheng Liu Sujun Dong Hongsheng Jiang Aicheng Li Fanxin Meng School of Aeronautic Science and Engineering Beihang University Beijing China Aviation Key Laborary of Science and Technology on Aero Electro Mechanical System Integration Nanjing Engineering Institute of Aircraft Systems AVIC Nanjing China

ISBN: (纸本)9781510872745

Based on the simulation data of performance of centrifugal compressor, this study analyzed the flow rate and efficiency curve of the compressor. By using third-order polynomial fitting method, we compared different results and found that the optimal sampling method was to have 5 lines of rotating speed with 7 different flow rate points in each line, in total 35 sample points, which satisfied the 5% fitting accuracy with minimal sample point and minimal experimental cost. Typical sample points for this optimal method was to set 3 lines of rotating speed and 3 flow rate points to be the maximum (rotating speed) flow rate, minimal (rotating speed) flow rate and the designed (rotating speed) flow rate, respectively. The rest sample points were distributed among those typical sample points. Finally, this sampling method was validated by the experimental results of centrifugal compressor.

关键词： Centrifugal compressor Performance curve Sampling method Polynomial fitting

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Optimization Calculation and Ergonomics Evaluation of Civil Aircraft Passenger Cabin Layout

Optimization Calculation and Ergonomics Evaluation of Civil ...

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2017 International Conference on Advances in Materials,Machinery,Electrical Engineering(AMMEE 2017)

作者： Yuhui Sheng Xiaoru Wanyan Damin Zhuang Yue Zhou School of Aeronauic Science and Engineering Beihang University Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration

ISBN: (纸本)9781510842915

Passenger cabin is considered as one of the most important areas in the civil aircraft, and the cabin layout patterns significantly influence the passengers' comfort, airways' profits and the brand images of companies. This research is geared to the needs of dual-channel large aircraft cabin layout and their ergonomics design. In our study, the overall cabin optimization calculation based on genetic algorithm and the individual passenger's comfort evaluation based on the JACK software's simulation analysis are comprehensively adopted, so as to conduct the optimization design for cabin layout and the assessment for the man-machine characteristics of the optimized cabin layout. It can provide the theoretical basis and technical methods for evaluating the comprehensive performance of cabin design of large aircrafts with dual channels.

关键词： Cabin layout optimization calculation ergonomics evaluation genetic algorithm simulation analysis

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