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2022 CSAA/IET International Conference on Aircraft utility systems, AUS 2022

作者： Wang, Hongchao Jiang, Hongyan Lei, Tigao Wang, Yin Fan, Zhengmao Chen, Jin Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China Nanjing Engineering Institute of Aircraft Systems AVIC Jincheng Jiangsu Nanjing211106 China

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

The frequency of the output signal of the magneto-electric speed sensor is proportional to its rotate speed. The higher the amplitude of electromotive force is, the stronger the anti-interference ability of the sensor is. Based on a magneto-electric speed sensor, this paper briefly introduces its working principle. With the help of Maxwell simulation software, it describes the influence of the shape of cogging structure of stator and rotor on the electromotive force when the turns of coil cannot be changed, and gets the influence of different cogging structure on the electromotive force of the sensor. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Stators

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Study on Redundancy Fault-Tolerant Control Strategy of Dual-Winding Permanent Magnet Machine for More Electric Aircraft Applications

Study on Redundancy Fault-Tolerant Control Strategy of Dual-...

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2022 CSAA/IET International Conference on Aircraft utility systems, AUS 2022

作者： Ge, Yibo Hu, Yaohua Peng, Cong Nanjing University of Aeronautics and Astronautics Nanjing China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Engineering Institute of Aircraft Systems Nanjing China

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

This paper has studied the redundancy fault-tolerant control (FTC) strategy of dual-winding permanent magnet synchronous machine (DWPMSM) for more electric aircraft applications. The open circuit fault (OCF) diagnosis, the short circuit fault (SCF) diagnosis, and the redundant communication policy are studied. The results show, when the system is normal, the two sets of windings of the DWPMSM work at the same time, and each windings outputs 50% of its own power. When the winding diagnosed as fault, which is shut off from the systems, then the fault signals are transported to the normal winding by redundancy communication function, and the control states of the normal winding are changed. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Winding

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Study On Short-Circuit Current Suppression Methods Of Dual-Winding Permanent Magnet Fault-Tolerant Machine For More Electric Aircraft Applications

Study On Short-Circuit Current Suppression Methods Of Dual-W...

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2022 CSAA/IET International Conference on Aircraft utility systems, AUS 2022

作者： Hu, Yaohua Zhu, Shushu Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Engineering Institute of Aircraft Systems Nanjing China Nanjing University of Aeronautics and Astronautics Nanjing China

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

This paper has studied the short-circuit current suppression methods of dual-winding permanent magnet fault-tolerant machine (PMFTM) for more electric aircraft applications. The cause of short circuit current is analysed, the thickness of stator tooth, the width of slot opening, and the split ratio are studied. Reducing the split ratio of the machine can increase the area of the stator slot accordingly to increase the number of winding turns, can effectively increase the self-inductance. Widening the tooth end thickness and reducing the slot opening width can increase leakage inductance, thus reducing the short-circuit current. A 8 kW, 12000 r/min prototype is manufactured, the analysis and simulation results are verified. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Permanent magnets

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A strong robustness open-circuit fault diagnosis strategy for novel fault-tolerant electric drive system based on d-q-axis current signal

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Chinese Journal of aeronautics 2021年第10期34卷 115-127页

作者： Xuefeng JIANG Shaoshuai WANG Jie LI Daoyu WU Wenxin HUANG Zhenmao HAN School of Automation Nanjing University of Science and TechnologyNanjing 210094China College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing 211106China

To diagnose the Open-Circuit(OC)fault in the novel fault-tolerant electric drive system,based on d-q-axis current signal,a strong robustness diagnosis strategy is proposed and *** independent power supplies and converters are required in the novel fault-tolerant electric drive system based on Dual-Winding Permanent Magnet Motor(DWPMM),and the system’s reliability,usage ratio and power density have been improved compared to the conventional fault-tolerant motor drive ***,the novel fault-tolerant electric drive system has the OC fault diagnostic false alarms issue when load changes suddenly or under light-load *** it lacks the research on the diagnostic method when the system encounters intermittent OC fault in power *** theory derivation,simulation and experimental verification,it can be concluded that the proposed strong robustness OC fault diagnosis strategy based on d-q-axis current signal can overcome the OC fault diagnostic false alarms issue when load changes suddenly or under light-load *** it can detect and locate the OC fault of single-phase winding in real time,and diagnose the intermittent OC fault of power switches.

关键词： Dual-winding motor Electric drive system Fault-tolerant system Open-circuit fault diagnosis Permanent magnet motor Strong robustness

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Three-dimensional flow field mathematical model inside the pilot stage of the deflector jet servo valve

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Journal of Zhejiang University-science A(Applied Physics & Engineering) 2022年第10期23卷 795-806页

作者： Shuang-lu LI Yao-bao YIN Jiang-yang YUAN Sheng-rong GUO School of Mechanical Engineering Tongji UniversityShanghai 201804China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Aviation Industry Corporation of ChinaNanjing 210061China

A new flow field mathematical model is proposed to describe accurately the flow field structure and calculate the static characteristics of the pilot stage in a deflector jet servo valve(DJSV). The flow field is divided into five regions, a 3D turbulent jet is adopted to describe the free jet region, and a velocity distribution expression of the jet is proposed. The jet entrainment model is put forward in the pressure recovery region to describe the coupling relationship between the pressure in the receiving chamber and the jet flow. The static characteristics, including pressure-flow characteristics, pressure characteristics,and flow characteristics of the pilot stage are obtained. The flow field structure and the static characteristics are verified by finite element analysis(FEA) and experiment, respectively, and the mathematical model results are in good agreement with the experimental and simulation results.

关键词： Deflector jet servo valve(DJSV) Pilot stage Three-dimensional jets Jets entrainment Static characteristics Mathematical model

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An Improved Speed Estimation Method for PMSM Using Speed Correction

An Improved Speed Estimation Method for PMSM Using Speed Cor...

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International Conference on Electrical Machines and systems (ICEMS)

作者： Weiqiang Sun Zhebin Yang Xiaojun Zhang Anqi Situ Yuqi Jia Jiaqiang Yang School of Electrical Engineering Zhejiang University Hangzhou China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China

ISBN: (数字)9784886864406

ISBN: (纸本)9798350379105

Sensorless control technology has been received significant attention in recent years due to its advantages of reducing system size and cost while enhancing reliability. As a result, it has become a key focus in the field of motor control research. However, the speed regulation and load capacity of sensorless methods diminish during low-speed operation, thereby negatively impacting the performance across broad range. To address this issue, an improved speed sensorless estimation method for permanent magnet synchronous machines (PMSM) combined with speed correction is proposed, which use the principle of corrective parameter selection and current estimation error to correct speed estimation. The outcomes of the experiments indicate that proposed method still run stably under full load at 10% of the rated speed during low-speed operation, verifying the feasibility and effectiveness of the method.

关键词： Permanent magnet machines Estimation error Motor drives Fans Costs Sensorless control Regulation Steady-state Reliability Convergence

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Data-Driven Based Model-Free MPC for DTP-PMSM with Optimized Space Vector

Data-Driven Based Model-Free MPC for DTP-PMSM with Optimized...

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International Conference on Electrical Machines and systems (ICEMS)

作者： Xiaojun Zhang Liang Yan Jiaqiang Yang Weiqiang Sun Yuqi Jia Anqi Situ College of Electrical Engineering Zhejiang University Hangzhou China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China

ISBN: (数字)9784886864406

ISBN: (纸本)9798350379105

Finite control set model predictive control (FCS-MPC) has been extensively investigated owing to its numerous disadvantage, such as fast response and easy implementation. However, FCS-MPC is highly sensitive to system modeling and parameters, and its performance deteriorate when the system has unmodeled dynamics and parameter mismatches. To address this issue, a data-driven based model-free predictive current control (MFPCC) for dual-three phase permanent magnet synchronous machine (DTP-PMSM) is proposed, which use only the input and output data of the system instead of the accurate mathematical models and parameters. In addition, the virtual voltage vectors (V3s) is utilized to reduce the harmonic current. More specifically, the space vector is optimized for reducing the torque ripple. Simulation investigations on DTP-PMSM platform validate the superiority of the proposed strategy.

关键词： Permanent magnet machines Computational modeling Predictive models Harmonic analysis Vectors Data models Mathematical models Robustness Steady-state Torque measurement

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Research and Verification of Aircraft Visual Fuel Measurement Method

Research and Verification of Aircraft Visual Fuel Measuremen...

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2022 CSAA/IET International Conference on Aircraft utility systems, AUS 2022

作者： Zhu, Hongyu Gao, Shan Shao, Yizhou Nanjing Engineering Institute of Aircraft System AVIC Nanjing China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China Nanjing Institute of Tourism and Hospitality Nanjing China

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

In this paper, a fuel measurement method based on monocular vision is proposed, including image collection, image enhancement and fuel calculation model. The visual sensor was used to collect the fuel image inside the fuel tank, and the image enhancement processing was carried out to reduce the distortion, fuzziness and other interference factors in the original image. A neural network model for fuel calculation based on machine learning was constructed, to mine the remaining fuel contained in the fuel image and realize the mapping from image to fuel data. A validation experiment was designed and carried out, and the effectiveness of the method was verified. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Image enhancement

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Study on Performance of Autonomous Power Generation and Refrigeration system of the Jamming Pod

Study on Performance of Autonomous Power Generation and Refr...

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2022 CSAA/IET International Conference on Aircraft utility systems, AUS 2022

作者： Luo, Kun Lv, Baohua Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration ShuiGe Road Nanjing China China Avionics Systems co. Itd Shuguangxili Courtyard Beijing China

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

The traditional electronic jamming pod depends on the power supply of the carrier. Limited by the power supply of the carrier, its ability of electronic jamming is weak, and the difference between the power supply system of the pod and the carrier makes the loading flexibility of the electronic jamming pod poor, which restricts the improvement of the performance of the electronic jamming pod. Under this background, this paper puts forward three schemes of autonomous power generation and refrigeration integrated system of electronic jamming pod. Based on the proposed system scheme, the system simulation model is established to simulate and compare the maximum effective power generation and refrigeration capacity of electronic jamming pod in the whole flight envelope and the fuel penalty of the system in the whole mission curve. The results show that the maximum effective power generation of system scheme 1 is greater under the same working conditions in the whole flight envelope, and the overall cooling capacity of system scheme 3 is stronger. Under certain power generation and cooling demand, the applicable flight envelope range of system scheme 1 is larger when the altitude is more than 4000m, while the total fuel penalty of system scheme 1 is smaller for the given flight mission curve. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Fuels

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Probabilistic RUL Prediction based on Nonlinear Wiener Process and Monte Carlo Simulation 15

Probabilistic RUL Prediction based on Nonlinear Wiener Proce...

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15th IEEE Global Reliability and Prognostics and Health Management Conference, PHM-Beijing 2024

作者： Huang, Bing Cao, Liang Liu, Ying Yao, Xiaohan Jiang, Fan Li, Qingyang Shan, Tianmin Wang, Jinglin Aviation Key Laboratory of Science and Technology on Fault Diagnosis and Health Management AVIC United Technology Center for Basic Research on Aircraft System Fault Diagnosis and Health Management AVIC Shanghai Aero Measurement & Controlling Research Institute Shanghai China

ISBN: (纸本)9798350354010

Remaining useful life (RUL) prediction is the core of intelligent operation and maintenance, improving operation and maintenance efficiency and reducing maintenance costs. Aiming at the limitations of RUL prediction methods based on mathematical derivation in terms of adaptability and flexibility, this paper proposes a probabilistic RUL simulation method for complex systems or complex degradation processes. The method constructs a degradation model using a complex nonlinear Wiener process, estimates the model parameters using maximum likelihood estimation, and updates the stochastic parameters based on the Bayesian updating strategy. On this basis, the prediction of probabilistic RUL is realized by the simulation algorithm. Compared with the mathematical derivation method, the prediction of the method proposed in this paper is accurate, which verifies the effectiveness and practicality of the simulation method. In a complex system or complex degradation process, the method in this paper can construct the probabilistic RUL prediction model faster. © 2024 IEEE.

关键词： Prediction models

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