检索结果-内蒙古大学图书馆

CSAA/IET International Conference on Aircraft Utility systems, AUS 2018

作者： Fanxin, Meng Zanjun, Gao Wenyuan, Zheng Wenchao, Hu Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Engineering Institute of Aircraft Systems NEIAS Nanjing China

ISBN: (纸本)9781785617911

The features of economy and environmental protection about civil aircraft are introduced. The development direction of airborne electromechanical system is pointed out on more electrical aircraft. The technological advantages and development status of electrical environmental control system are analyzed. The key technologies of electrical cabin supply air system are described, including high pressure ratio compression, centrifugal compressor anti-surge, variable diffuser design, air bearing supporting, large power motor control, high speed rotor cooling, foreign object damage protection, air inlet anti-icing. It is very helpful to provide technical support for environmental control system development for new generation green civil aircraft. © 2018 IET Conference Publications. All rights reserved.

关键词： Flight control systems

来源：评论

学校读者我要写书评

暂无评论

Improve constant power speed range of multilayered interior permanent mangnet machines for traction application

Improve constant power speed range of multilayered interior ...

引用

CSAA/IET International Conference on Aircraft Utility systems, AUS 2018

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

ISBN: (纸本)9781785617911

The constant power speed range (CPSR) of the multi-layered interior permanent magnet (IPM) machines are investigated for the traction applications. The constant power speed range of the initial design is weak because the characteristic current is too large. Then, the structure of initial model is optimized to other two structures. Not only the constant power speed range of two optimized structures are improved by reduce the magnet volume and increase the rib width, but also can reduce the manufacturing complexity and magnet cost. The widest constant power speed range is obtained when the characteristic current equals to the rated current. Finally, a multi-layered IPM machine is manufactured to verify the FE analysis. © 2018 IET Conference Publications. All rights reserved.

关键词： Permanent magnets

来源：评论

学校读者我要写书评

暂无评论

Study on Outer Rotor FSCW Permanent Magnet Machines for Unmanned Aerial Vehicle Electric Green Taxiing systems

引用

IOP Conference Series: Materials science and Engineering 2020年第1期887卷

作者： Hua Xu Yaohua Hu Jinpeng Yang Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Engineering Institute of Aircraft Systems Nanjing 211106 China

This paper considers the possibility of adopting an outer rotor fractional slot concentrated winding (FSCW) permanent magnet synchronous machine (PMSM) for Unmanned Aerial Vehicle Electric Green Taxiing (EGT) application. The electromagnet performance such as no-load air-gap flux density, flux linkage distribution, electromotive force (EMF), average torque, torque ripple, and iron losses are studied by finite-element analysis (FEA). The results show the iron loss is mainly effected by the machine frequency. The unmanned aerial vehicle EGT structure are introduced, which includes the outer rotor FSCW PM machine, the reducer, the clutch, and the tire.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Study on Lumped Magnetic Circuit in Interior PM Machines for Aircraft Electric Green Taxiing systems

引用

IOP Conference Series: Materials science and Engineering 2020年第1期751卷

作者： Pengfei Zhang Yaohua Hu Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Engineering Institute of Aircraft Systems Nanjing 211106 China

This paper considers the possibility of adopting a V-shaped interior permanent magnet (IPM) machine for Electric Green Taxiing (EGT) application. This rotor topology of the IPM machine has been optimized to reduce the torque ripple and iron loss. An analytical lumped magnetic circuit model was adopted to minimize the total harmonic distortion (THD) of air-gap flux density for the V-shaped IPM machine. The results of analytical lumped magnetic circuit model were compared with finite-element analysis (FEA). With the optimized rotor structure parameters, the torque ripple at the maximum torque per ampere and iron loss at the flux-weakening control were investigated.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Study on Magnet Eddy Current Losses in Interior Permanent Magnet Machines for Aircraft Electric Green Taxiing systems

引用

IOP Conference Series: Materials science and Engineering 2020年第1期751卷

作者： Yaohua Hu Pengfei Zhang Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Engineering Institute of Aircraft Systems Nanjing 211106 China

The magnet eddy current of multi-layered interior permanent magnet (IPM) machines is studied in the paper for the aircraft electric green taxiing systems. The armature reaction flux density distribution, eddy current density and harmonic spectrum at the end of permanent magnet are analysed. A method to reduce the magnet eddy current of multi-layered IPM machines is presented. That is to increase the distance between outer permanent magnet and rotor surface and the distance between two layers of permanent magnet so as to provide a larger core path for armature reactive flux. This method can effectively reduce the magnet eddy-current loss of the multi-layered IPM machines and improve the operation efficiency.

关键词：

来源：评论

学校读者我要写书评

暂无评论

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

Numerical investigation of influence of structure and operat...

引用

CSAA/IET International Conference on Aircraft Utility systems, AUS 2018

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

ISBN: (纸本)9781785617911

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. © 2018 IET Conference Publications. All rights reserved.

关键词： Vortex flow

来源：评论

学校读者我要写书评

暂无评论

Research on improved control method of electromechanical actuation

Research on improved control method of electromechanical act...

引用

作者： Xiao, Xi Xiong, Si Wu, Xia Liu, Dan Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Jiangsu211106 China Beijing Aeronautical Science and Technology Research Institute of COMAC Beijing102211 China

This study presents a kind of feedback between smooth and discontinuous feedback control method for electromechanical servo system. First, the construction and working principle of electromechanical servo systems was introduced on the basis of their structure characteristic. Then with the building of the electromechanical servo system structure, some research on the control strategy of permanent-magnet synchronous motors has been developed control in the light of their control characteristics. Combined with the theory of the field oriented control and the structure features and performance metrics of the mechanical and electrical servo system, a simulation model for the mechanical and electrical servo system was built. The simulation result shows the reliability of this method. © 2018 Institution of Engineering and technology. All rights reserved.

关键词： Servomechanisms

来源：评论

学校读者我要写书评

暂无评论

All-Electric Aircraft Nose Wheel Steering system with Two Worm Gears

引用

Transactions of Nanjing University of aeronautics and Astronautics 2018年第1期35卷 170-180页

作者： Zhang Ming Li Chuang Wu Xin Zhu Yin Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle Nanjing University of Aeronautics&AstronauticsNanjing 210016P.R.China Shanghai Aircraft Design and Research Institute Shanghai 201210P.R.China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing 211106P.R.China

As all-electric aircraft has many advantages,an aircraft nose wheel steering system would be developed to the all-electric *** the control demand of the nose wheel steering system,based on the basic principles of nose wheel steering system and the design technique of mechanotronics,an all-electric aircraft nose wheel steering system,composed of a nose wheel steering mechanism of two worm gear and a control servo system of fly-by-wire with both steering and anti-shimmy functions is designed to meet the demand for operation control in the nose wheel steering ***,based on the LMS-AMESim software,the simulation model of the system is established to simulate the dynamics for the verification of its steering *** simulation results indicate that the nose wheel steering system is reasonable,and can meet the requirements of the general ***,the prototypes of the steering mechanism and control system are studied to validate the design,and the steering test bench is prepared to test the designed *** test results,such as steer angle,rotate speed of motor are analyzed in details and compared with the theoretical *** analysis and comparison results show that the design is reasonable and the property of the prototype can achieve the design objectives.

关键词： mechanotronics design nose wheel steering system all-electric aircraft design landing gear

来源：评论

学校读者我要写书评

暂无评论

Reduction of Iron Loss in a V-Shaped IPM Machine for Traction Applications

Reduction of Iron Loss in a V-Shaped IPM Machine for Tractio...

引用

International Conference on Electrical Machines and systems (ICEMS)

作者： Ma Zhiyong Yaohua Hu Chen Can The Fourth Representative Office of the Navy in Nanjing Navy Military Representative Office in Nanjing Nanjing China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Engineering Institute of Aircraft Systems Nanjing China

ISBN: (纸本)9781728133997

This paper has proposed a novelty method to reduce the iron loss of a V-shaped interior permanent magnet (IPM) machine for traction applications. By optimizing the pole-arc to pole-pitch ratios of magnets and shaping the rotor iron, the total iron losses of initial model is extremely reduced, due to the harmonics of rotor magnetomotive force are reduced. The waveforms and harmonics of air gap flux density and flux density of stator core are studied. The core loss and core loss density of three IPM motors are analyzed and compared. The efficiency of the optimized V-shaped IPM machine can be improved under high speed condition by the reduction of iron loss.

关键词： Iron loss Interior permanent magnet (IPM) machine Rotor magnetomotive force harmonics Shaping the rotor iron Core loss air-gap flux density Integrated Pest Management harmonics reduction Stator cores MAGNETS machine waveforms

来源：评论

学校读者我要写书评

暂无评论

A study on electromagnet attraction characteristics based on Maxwell

A study on electromagnet attraction characteristics based on...

引用

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

作者： Le Yang Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration AVIC NEIAS Nanjing China

ISBN: (纸本)9781510872745

The structure and working principles of airborne electromagnets were introduced and magnetic field analysis and electromagnetic attraction calculation were completed with Maxwell electromagnetic simulation software. By magnetostatic field analysis, the distribution diagrams of magnetic lines of force and magnetic induction intensity were obtained; by electromagnet attraction analysis, the electromagnet attraction was calculated and the impacts of materials, air gap and excitation on electromagnet attraction were examined, thus providing valuable reference for electromagnet optimization.

关键词： Maxwell Electromagnet Magnetostatic field Attraction

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：