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2016 IEEE/CSAA International Conference on Aircraft Utility systems, AUS 2016

作者： Kun, Luo Liping, Pang Helin, Zhang Beijing100191 China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Engineering Institute of Aircraft Systems Nanjing211102 China

ISBN: (纸本)9781509010875

Relative humidity level affects cabin comfort of civil aircraft. In this paper, a prediction method of relative humidity was developed based on a well-mixed zonal model. To improve the prediction accuracy, a Lumped Virtual Moisture Source (LVMS) and its two-node moisture transfer model were established to describe a moisture desorption-Absorption process of the total of interiors materials in a simple way. The conception of lumped moisture capacity and lumped moisture resistance was firstly introduced to represent moisture storage capability and moisture transfer resistance for the total interior materials. A parameter identification procedure was further presented to obtain these two model parameters of LVMS for different types of civil aircrafts using measured data onboard. Cabin environmental measurements were carried out in five types of civil aircrafts. Compared with continuously measured data during flight, the method to predict the cabin relative humidity can adapt to different types of aircrafts and agree with measured data well. This study may provide some help to develop a reasonable humidity control strategy and suggest proper water storage of humidifier. © 2016 IEEE.

关键词： Humidity control

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Design and Experimental Evaluation of PID Controller for Digital Electro-Pneumatic Cabin Pressure Control system

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Transactions of Nanjing University of Aeronautics and Astronautics 2016年第5期33卷 576-583页

作者： Nie Jinfang Pan Quan Shen Hao Song Zhitao Zhang Dalin College of Automation Northwestern Polytechnical University Xi'an 710072 P.R. China Shanghai Aircraft Airworthiness Certification Center of CAAC Shanghai 200335 P.R. China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing University of Aeronautics and Astronautics Nanjing 210016 P.R. China

The performance of the designed digital electro-pneumatic cabin pressure control system for the cabin pressure schedule of transport aircraft is *** the purpose of this study,an experimental setup consisting of a simulated hermetic cabin and altitude simulation chamber is configured for cabin pressure control system operation.A series of experimental tests are executed to evaluate the performance of the cabin pressure control *** parameters of the PID controller are *** the optimization process,the variation regularity of the rate of cabin pressure change under various conditions is *** approach to prioritize the control of the rate of change of cabin pressure based on the flight status model is proposed and verified *** experimental results indicate that the proposed approach can be adopted for the designed digital electro-pneumatic cabin pressure control system to obtain a better cabin pressure schedule and rate of cabin pressure change.

关键词： cabin pressure control digital electro-pneumatic PID controller

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The study on power generation technology by heat energy of reheated-based Rankine cycle

The study on power generation technology by heat energy of r...

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2016 4th International Conference on Machinery,Materials and Computing technology(ICMMCT 2016)

作者： Xuejuan Zhao Aicheng Li School of Aeronautic Science Engineering Beihang University Aviation Key Laboratory of Science and Technology On Aero Electromechanical System Integration

ISBN: (纸本)9781510821934

This paper discussed the operation principle of reheated Rankine cycle according to the first law of thermodynamics and proposed a method to acquire the optimum reheated pressure ratio based on the highest cycle thermal efficiency. In order to verify the rationality and validity of this method, this paper selected R134 a, R11 and R227 ea to be the working fluids and calculated the thermodynamic performance of the reheated Rankine cycle system with using MATLAB and REFPROP. This paper also studied the thermodynamic performance of the conventional Rankine cycle system under the same conditions to compare the difference with the reheated cycle pattern.

关键词： reheated Rankine cycle average temperature of heat absorption optimum reheated pressure ratio thermodynamic performance

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Input-Parallel Output-Series DC/AC Converter for On-Board EV Charger

Input-Parallel Output-Series DC/AC Converter for On-Board EV...

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IEEE Conference on Vehicle Power and Propulsion (VPPC)

作者： Yue Zhang Zheng Wang Ming Cheng Liang Xu School of Electrical Engineering Southeast University China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration China

ISBN: (纸本)9781509035298

An input-parallel output-series full-bridge DC/AC converter for on-board Electric Vehicle (EV) charger is proposed in this paper with the merits that low input current ripple and output voltage ripple. It can also decrease the current stress on the primary side devices and voltage stress on secondary side devices. This proposed DC/AC converter interleaves two isolated full-bridge converters with parallel input and series output connection. The DC/DC converter is followed by a current-fed inverter with inductor link. The merits such as high voltage turn ratio make the converter suitable for EV on-board chargers. Steady-state operation modes, analysis, simulation results are presented in this paper. A 1KW laboratory prototype is built to demonstrate the validity of the proposed topology. The results of experiment demonstrate the validity of proposed topology well.

关键词： Inverters Inductors Stress Voltage control Topology Modulation Bridge circuits

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Application of Class-E Converter in Magnetic Resonant WPT system

Application of Class-E Converter in Magnetic Resonant WPT Sy...

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

作者： CHEN Wen-xian CHEN Qian-hong Nanjing Engineering Institute of Aircraft System/Aviation Key Laboratory of Science and Technology on Aero Electromechanical system integration IEEE Nanjing University of Aeronautics and Astronautics

In this paper,the maximum voltage gain and output power design method based on the optimal distance point is also put ***,the research on the efficiency evaluation in Class-E converter based on GaN devices has shown that GaN transistor can obviously brings higher transmission efficiency,smaller size and lower cost in Class-E converter due to the lower R and the gate charge（Qg）.

关键词： magnetic resonance WPT wireless power transfer Class-E converter GaN transistor

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Direct torque control of dual three-phase PMSM drives based on two-step voltage vector synthesis SVM

Direct torque control of dual three-phase PMSM drives based ...

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International Conference on Power Electronics and Motion Control (IPEMC)

作者： Xueqing Wang Zheng Wang Jian Chen Ming Cheng Liang Xu School of Electrical Engineering Southeast University Nanjing China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China

ISBN: (纸本)9781509012114

In this paper, a space vector modulation (SVM) based DTC scheme is proposed for the dual three-phase PMSM. This scheme provides an effective solution for multiphase drives by inheriting the advantages of fast dynamic performance and robust control architecture of DTC. Besides, the proposed scheme can suppress the current harmonics induced not only from inherent property of dual three-phase PMSM, but also from nonlinear factors such dead-time and asymmetry in drives. The vector synthesis process in the scheme has been simplified compared to conventional SVM-DTC scheme. The experimental results are given to verify the validity of the proposed SVM-DTC scheme.

关键词： Harmonic analysis Support vector machines Switches Stators Voltage control Torque Power electronics

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Application of class-E converter in magnetic resonant WPT system

Application of class-E converter in magnetic resonant WPT sy...

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IEEE International Conference on Aircraft Utility systems (AUS)

作者： Wen-Xian Chen Qian-Hong Chen Aviation Key Laboratory of Science and Technology on Aero Electromechanical system integration Nanjing Engineering Institute of Aircraft System Nanjing China Nanjing University of Aeronautics and Astronautics Nanjing Jiangsu CN

ISBN: (纸本)9781509010882

In this paper, the maximum voltage gain and output power design method based on the optimal distance point is also put forward. Meanwhile, the research on the efficiency evaluation in Class-E converter based on GaN devices has shown that GaN transistor can obviously brings higher transmission efficiency, smaller size and lower cost in Class-E converter due to the lower R ds(on) and the gate charge (Q g ).

关键词： Magnetic resonance Gallium nitride MOSFET RLC circuits Resistance Switches Inductors

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The dual-channel magnetically integrated chargers for plug-in electric vehicles

The dual-channel magnetically integrated chargers for plug-i...

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IEEE Energy Conversion Congress and Exposition

作者： Bochen Liu Zheng Wang Yue Zhang Ming Cheng Liang Xu School of Electrical Engineering Southeast University Nanjing Jiangsu Province China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Jiangsu Province China

ISBN: (纸本)9781509007387

In this paper, a dual-channel isolated three-phase magnetically integrated chargers (MICs) are presented for plugin electric vehicles. The key is to apply and operate two interleaved power charging circuits, each of which is composed of one dual-active-bridge (DAB) isolated converter and one three-phase grid inverter. The proposed configuration not only offers isolated charging but also provides modular design and operation for each channel, which are useful for high-power applications in fast charging. The interleaved operation and the phase-shifted carriers enable low current ripple on battery side and better harmonic performance on grid side. Furthermore, chaotic modulation has been applied to reduce the distinct switching harmonics in spectrum, which will facilitate improving the conducted electromagnetic compatibility (EMC). The detailed design of modulation strategy and control scheme are described in this paper. Experimental results have been presented for a 1-kW laboratory prototype to verify the validity of the proposed configuration and schemes.

关键词： plug-in electric vehicles dual-channel integrated chargers

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Active damping of LC resonance for paralleled indirect matrix converter based on cascaded control

Active damping of LC resonance for paralleled indirect matri...

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IEEE Energy Conversion Congress and Exposition

作者： Yang Xiao Zheng Wang Shuai You Ming Cheng Liang Xu School of Electrical Engineering Southeast University Nanjing Jiangsu Province China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Jiangsu Province China

ISBN: (纸本)9781509007387

The indirect matrix converters (IMC) offer the advantages of high reliability and compactness in structure due to no large energy storage components in virtual DC side, and thus have a promising application in the future. However, the LC resonance caused by input filter is one reason keeps it from being utilized in industry. Different from pervious solutions of LC resonance damping for single IMC, this paper proposes an active damping strategy for the paralleled IMC with both interleaved operation and cascaded control of input LC filter. The key is to apply the closed-loop control of grid currents to generate the references for capacitor voltages, which are tracked by the inner capacitor voltage loop. By designing the control parameters properly, this method can not only suppress the LC resonance effectively but also offer accurate control of grid currents. In order to further mitigate resonance, the interleaved operation is applied to reduce specific order harmonic around resonant frequency of LC filter. No additional cost will be required for the proposed interleaved and cascaded control strategy. Furthermore, the feed-forward terms of voltage drop on filter inductor and capacitor currents are added to the control, in such a way that the decoupling effects between the d-axis and q-axis are removed and the dynamic response becomes better. Both simulation and experiments are given to verify the correctness and feasibility of the proposed strategy.

关键词： Resonance Active damping control Paralleled indirect matrix converter LC filter

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Commercial aircraft distribution network reconfiguration based on power priority

Commercial aircraft distribution network reconfiguration bas...

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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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