Brief Notice to Contributors

1 Chinese Journal of Aeronautics （CJA）, a comprehensive academic journal in the field of aeronautics and astronautics, sponsored by the Chinese Society of Aeronautics and Astronautics, is a quarterly in English, issued in February, May, August and November.The CJA, started in1988, consisted originally of selected papers translated from the Acta Aeronautica et Astronautica Sinica （AAAS）（ in Chinese）.Beginning from 1996, some contributed papers to the Press of AAAS have been directly adopted and edited as articles in CJA, and the publication of any paper has no longer been repeated in the two Journals.     

Brief Notice to Contributors

1　 Chinese Journal of Aeronautics (CJA) ,a comprehensive academic journal in the field of aeronautics and astronautics,sponsored by the Chinese Society of Aeronautics and Astronautics,is a quarterly in English,issued in February,May,Au-gust and November.The CJA,started in1988,consisted originally of selected papers translated from the Acta Aeronautica etAstronautica Sinica(AAAS) (in Chinese) .Beginning from 1996 ,some contributed papers to the Press of AAAS have beendirectly adopted and edited as articles i...     

Identification and standardization of maneuvers based upon operational flight data

To find a way of loads analysis from operational flight data for advanced aircraft,maneuver identification and standardization jobs are conducted in this paper. For thousands of sorties from one aircraft, after studying the flight attitude when performing actions, the start and end time of the maneuvers can be determined. According to those time points, various types of maneuvers during the flight are extracted in the form of multi-parameters time histories. By analyzing the numerical range and curve shape of those parameters, a characteristic data library is established to model all types of maneuvers. Based on this library, a computer procedure using pattern-recognition theory is programmed to conduct automatic maneuver identification with high accuracy. In that way, operational loads are classified according to maneuver type. For a group of identified maneuvers of the same type, after the processes of time normalization, trace shifting, as well as averaging and smoothing, the idealization standard time history of each maneuver type is established.Finally, the typical load statuses are determined successfully based on standard maneuvers. The proposed method of maneuver identification and standardization is able to derive operational loads effectively, and might be applied to monitoring loads in Individual Aircraft Tracking Program(IATP).     

Type synthesis of 2-DoF rotational parallel mechanisms actuating the inter-satellite link antenna

This paper focuses on the type synthesis of two degree-of-freedom (2-DoF) rotational parallel mechanisms (RPMs) that would be applied as mechanisms actuating the inter-satellite link antenna. Based upon Lie group theory, two steps are necessary to synthesize 2-DoF RPMs except describing the continuous desired motions of the moving platform. They are respectively generation of required open-loop limbs between the fixed base and the moving platform and definition of assembly principles for these limbs. Firstly, all available displacement subgroups or submanifolds are obtained readily according to that the continuous motion of the moving platform is the inter-section of those of all open-loop limbs. These subgroups or submanifolds are used to generate all the topology structures of limbs. By describing the characteristics of the displacement subgroups and submanifolds intuitively through employing simple geometrical symbols, their intersection and union operations can be carried out easily. Based on this, the assembly principles of two types are defined to synthesize all 2-DoF RPMs using obtained limbs. Finally, two novel categories of 2-DoF RPMs are provided by introducing a circular track and an articulated rotating platform, respectively. This work can lay the foundations for analysis and optimal design of 2-DoF RPMs that actuate the inter-satellite link antenna.     

Guide for Authors

正About Journal Chinese Journal of Aeronautics(CJA)is a comprehensive academic journal dealing with the fields of aeronautics and astronautics.It reports researches concerning the two fields in China and abroad to promote the academic exchange.Founded in 1988 and sponsored by the Chinese Society of Aeronautics and Astronautics and Beihang University,CJA publishes papers monthly.The intended readers of the journal are specialized technical workers,teachers and students in colleges and     

Brief Notice to Contributors

1　 Chinese Journal of Aeronautics (CJA) ,a comprehensive academic journal in the field of aeronautics and astronautics,sponsored by the Chinese Society of Aeronautics and Astronautics,is a quarterly in English,issued in February,May,Au-gust and November.The CJA,started in1988,consisted originally of selected papers translated from the Acta Aeronautica etAstronautica Sinica(AAAS) (in Chinese) .Beginning from 1996 ,some contributed papers to the Press of AAAS have beendirectly adopt…     

Brief Notice to Contributors

1 Chinese Journal of Aeronautics (CJA),a comprehensive academic journal in the field of aeronautics and astronautics, sponsored by the Chinese Society of Aeronautics and Astronautics, is a quarterly in English, issued in February,May,August and November. The CJA,started in 1988,consisted originally of selected papers translated from the Acta Aeronautica et Astronautica Sinica (AAAS) (in Chinese) . Beginning from 1996, some contributed papers to the Press of AAAS have been di     

Rotordynamic prediction of mode order transition when rotor has an overhang

Nowadays rotating machinery grows and develops extremely fast due to its multi-branch application. Although the fields of rotordynamics and rotor balancing had a strong background based on previous experience in order to perform efficient and safe operation for the rotating machines, still there are problems which are hard to be dealt with in some special cases. One of them is balancing of the rotor with huge overhang. Rotor with overhang is inherent to have console modes, which previously often were observed separately from the other modes in rotordynamic literature. In such a way console modes, their behavior, order of appearance and interaction with other modes were described in current paper in more details. Obtained results confirmed that console modes obey the principle of orthogonality in the same way as all other modes and hence could be efficiently balanced using modal balancing method. Simulation results revealed likelihood of such phenomena as modes order transition, when the rotor has an overhang. As a consequence perfectly balanced console rotor could not be so due to modes order transition effect when the bearing stiffness in situ differs from bearing stiffness of balancing equipment. Described results will be useful for engineers who are involved in area of rotating machinery vibration tuning for the rotor with huge overhang and benefit them to recognize these modes efficiently and to perform balancing successfully.      

CHINESE JOURNAL OF AERONAUTICS

正(Monthly)Published in February 2018,Started in 1988 Aims and Scope Chinese Journal of Aeronautics(CJA)is an open access,peer-reviewed international journal which publishes papers of outstanding scientific and technological work monthly.The main Aim of the Journal is to report the scientific and technological achievements frontiers in aeronautic and     

First Shanghai International Aviation Symposium Held

Shanghai held its first international aviation symposium at its Portman Ritz-Carlton from April 28 to 30 in order to promote the sustainable development of the civil aviation industry in East China and the Yangtze Delta. The forum was also considered as an accelerating effort to build Shanghai into an international air hub. CAAC Minister Yang Yuanyuan and Shanghai Mayor Han Zheng delivered opening speeches.Yang said: "Priority should be given to the human spirit when we step up effort to build the city into an air hub. We aim to let more common people benefit from the development of civil aviation."     

Guide for Authors

<正>About Journal Chinese Journal of Aeronautics(CJA) is a comprehensive academic journal dealing with the fields of aeronautics and astronautics. It reports researches concerning the two fields in China and abroad to promote the academic exchange. Founded in 1988 and sponsored by the Chinese Society of Aeronautics and Astronautics and Beihang University, CJA publishes papers bimonthly, with issues released in February, April, June, August, October and December. The intended readers of the journal are specialized technical workers, teachers and students in colleges and universities and the related personnel of management,     

Events of AAAS Editor Department in 2013

（1） In January 2013, CJA adopted the newest publishing mode in the world -- ＂full article in press＂ on Science Direct and ＂gold open access＂ services, which aims to shorten the publishing cycle of electronic publication and further enhance its international visibility.     

An Overview of Performance Characteristics, Experiences and Trends of Aerospace Engine Bearings Technologies

In this paper, the operating conditions, technical requirements, performance characteristics, design ideas, application experiences and development trends of aerospace engine bearings, including material technology, integration design and reliability, are reviewed. The development history of aerospace engine bearing is recalled briefly at first. Then today＇s material technologies and the high bearing performances of the bearings obtained through the new materials are introduced, which play important roils in the aeroengine bearing developments. The integration design ideas and practices are explained to indicate its significant advantages and importance to the aerospace engine bearings. And the reliability of the shaft-bearing system is pointed out and treated as the key requirement with goals for both engine and bearing. Finally, as it is believed that the correct design comes from practice, the pre-qualification rig testing conducted by FAG Aerospace GmbH ＆ Co. KG is briefly illustrated as an example. All these lead to the development trends of aerospace engine bearings from different aspects.     

Vulnerability analysis for airport networks based on fuzzy soft sets: From the structural and functional perspective

Recently,much attention has been paid to the reliability and vulnerability of critical infrastructure.In air traffic systems,the vulnerability analysis for airport networks can be used to guide air traffic administrations in their prioritization of the maintenance and repair of airports,as well as to avoid unnecessary disturbances in the planning of flight schedules.In this paper,the evaluation methods of airport importance and network efficiency are established.Firstly,the evaluation indices of airport importance are proposed from both the topological and functional perspectives.The topological characteristics come from the structure of airport network and the functional features stem from the traffic flow distribution taking place inside the network.Secondly,an integrated evaluation method based on fuzzy soft set theory is proposed to identify the key airports,which can fuse together importance indices over different time intervals.Thirdly,an airport network efficiency method is established for the purpose of assessing the accuracy of the evaluation method.Finally,empirical studies using real traffic data of US and China’s airport networks show that the evaluation method proposed in this paper is the most accurate.The vulnerability of US and China’s airport networks is compared.The similarities and differences between airport geography distribution and airport importance distribution are discussed here and the dynamics of airport importance is studied as well.     

CHINESE JOURNAL OF AERONAUTICS

正(Bimonthly)Volume 29 Number 4(Sum No.133)2016Published in August 2016,Started in 1988 Aims and Scope Chinese Journal of Aeronautics(CJA)is an open access,peer-reviewed international journal which publishes papers of outstanding scientific and technological work bimonthly.The main Aim of the Journal is to report the scientific and technological achievements frontiers in aeronautic and     

Guide for Authors

<正>About Journal Chinese Journal of Aeronautics(CJA)is a comprehensive academic journal dealing with the fields of aeronautics and astronautics.It reports researches concerning the two fields in China and abroad to promote the academic exchange.Founded in 1988 and sponsored by the Chinese Society of Aeronautics and Astronautics and Beihang University,CJA publishes papers bimonthly,with issues released in February,April,June,August,October and December.The intended readers of the journal are specialized technical workers,teachers and students in colleges and     

Guide for Authors

正About Journal Chinese Journal of Aeronautics(CJA)is a comprehensive academic journal dealing with the fields of aeronautics and astronautics.It reports researches concerning the two fields in China and abroad to promote the academic exchange.Founded in 1988 and sponsored by the Chinese Society of Aeronautics and Astronautics and Beihang University,CJA publishes papers bimonthly,with issues released in February,April,June,August,October and December.The intended readers of the journal are specialized technical workers,teachers and students in colleges and     

《舌尖上的中国》背后鲜为人知的故事

火爆全中国的纪录片《舌尖上的中国》终于有了图书版The hometown of each tongue constitute the wholeof China,and forming a parr of something calledculture,inherited from generation to generation.With wisdom,Chincse got the delicous food fromnature,all this has been able to achieve,duc totheir fear of God and food as well as love of the     

基于多Agent的舰载机弹射起飞仿真层次模型(英文)

With the aid of multi-agent based modeling approach to complex systems, the hierarchy simulation models of carrier-based aircraft catapult launch are developed. Ocean, carrier, aircraft, and atmosphere are treated as aggregation agents, the detailed components like catapult, landing gears, and disturbances are considered as meta-agents, which belong to their aggregation agent. Thus, the model with two layers is formed i.e. the aggregation agent layer and the meta-agent layer. The information communication among all agents is described. The meta-agents within one aggregation agent communicate with each other directly by information sharing, but the meta-agents, which belong to different aggregation agents exchange their information through the aggregation layer first, and then perceive it from the sharing environment, that is the aggregation agent. Thus, not only the hierarchy model is built, but also the environment perceived by each agent is specified. Meanwhile, the problem of balancing the independency of agent and the resource consumption brought by real-time communication within multi-agent system （MAS） is resolved. Each agent involved in carrier-based aircraft catapult launch is depicted, with considering the interaction within disturbed atmospheric environment and multiple motion bodies including carrier, aircraft, and landing gears. The models of reactive agents among them are derived based on tensors, and the perceived messages and inner frameworks of each agent are characterized. Finally, some results of a simulation instance are given. The simulation and modeling of dynamic system based on multi-agent system is of benefit to express physical concepts and logical hierarchy clearly and precisely. The system model can easily draw in kinds of other agents to achieve a precise simulation of more complex system. This modeling technique makes the complex integral dynamic equations of multibodies decompose into parallel operations of single agent, and it is convenient to expand, maintain, and reuse the pro     

Brief Notice to Contributors

1　 Chinese Journal of Aeronautics( CJA) ,a comprehensive academic journal in the field of aeronautics and astro-nautics,sponsored by the Chinese Society of Aeronautics and Astronautics,is a quarterly in English,issued in Febru-ary,May,Augustand November.The CJA,started in1 988,consisted originally of selected papers translated from theActa Aeronautica et Astronautica Sinica( AAAS) ( in Chinese) .Beginning from 1 996,some contributed papers to thePress of AAAS have been directly ad…