Competitive Environment and Reform Conceptions

There are various signs that indicate the pace of civil aviation reform is quickening withlittle buzz.People hold a common understanding that the air fare hearing, which was held in mid-Julyafter being postponed by SARS, is an important progress of market-oriented reform of civilaviation despite controversies among representatives and different remarks from the society.As a development strategy of Chinese civil aviation, regional aviation has been proposedfor many years. However, few actions…     

Achieving the Stride From "Big" to "Strong

Time flies. Here we come to a new year again.The just-gone 2002 is bound to leave a heavy print in the history of Chinesecivil aviation. The plan of civil aviation system reform was settled and this re-form has entered into the implementation phase. The establishment of three airtransport groups and three aviation support groups was announced, which sym-bolizes an essential step has been taken in the civil aviation system reform. At theend of the year, good news that the Capital Airport Grou…     

Regional Aviation: Bright Future, Hard Process

Regional aviation was a common topic of discussion inside the industry inrecent years. This is, above all, because regional aviation is still at a primary stageof development with both huge market potentials and many problems needing tobe solved in an urg…     

A systematic literature review of human-centered design approach in single pilot operations

Single Pilot Operations(SPO), as a NextGen concept of operation, can save both crew costs and human resources for airlines, and has attracted the attention of aviation researchers. To explore in advance the problems that the introduction of SPO into the aviation system would bring,the Human-Centered Design(HCD) approach has been widely used in the development of SPO. A systematic review of the progress of HCD approach in SPO research can promote further development of SPO. In this paper, the lit...     

飞机防治小麦叶枯性病害研究

China is a big agricultural country. If she can raise the yield of grain through aviation, it would be of great significance to her national economy. This kind of researches developed by the writer of this article has already gained much economic benefits, with its value popularizing to the whole country. The departments of general aviation are worthwhile to use for reference in the practical work.     

China’s Aviation Industry: a Global Partnership Strategy

This article discusses one of the main strategies which China has implemented to develop its competency in the aviation field. It is strategic for China to boost its aviation industry via international cooperation and several models of involvement into the global aviation value chain with leading aviation industries. As it is depicted as a strategy here, it is not necessary to say that a formal strong national strategy in encouraging exists. Actually, it is clearly a way China’s aero industry takes to develop its competency and business at the context it encounters. From an observer’s perspective, it is indeed a critical strategy. This article describes this strategy via the context, policies, program cases, as well as the evolution of the cooperation models in order to synthesize the strategy.     

Integrated Framework for Understanding Relationship Between Human Error and Aviation Safety

Introducing a framework for understanding the relationship between human error and aviation safety from multiple perspectives and using multiple models. The first part of the framework is the perspective of individual operator using the information processing model. The second part is the group perspective with the Crew Resource Management （CRM） model. The third and final is the organization perspective using Reason＇s Swiss cheese model. Each of the perspectives and models has been in existence for a long time, but the integrated framework presented allows a systematic understanding of the complex relationship between human error and aviation safety, along with the numerous factors that cause or influence error. The framework also allows the identification of mitigation measures to systematically reduce human error and improve aviation safety.     

Theoretical study of flow ripple for an aviation axial-piston pump with damping holes in the valve plate

Based on the structure of a certain type of aviation axial-piston pump＇s valve plate which adopts a pre-pressurization fluid path （consisting a damping hole, a buffer chamber, and an orifice） to reduce flow ripple, a single-piston model of the aviation axial-piston pump is presented. This sin- gle-piston model comprehensively considers fluid compressibility, orifice restriction effect, fluid resistance in the capillary tube, and the leakage flow. Besides, the instantaneous discharge areas used in the single-piston model have been calculated in detail. Based on the single-piston model, a multi-piston pump model has been established according to the simple hydraulic circuit. The sin- gle- and multi-piston pump models have been realized by the S-function in Matlab/Simulink. The developed multi-piston pump model has been validated by being compared with the numerical result by computational fluid dynamic （CFD）. The effects of the pre-pressurization fluid path on the flow ripple and the instantaneous pressure in the piston chamber have been studied and opti- mized design recommendations for the aviation axial-piston pump have been given out.     

The Threshold of Civil Aviation and The Discount of Tickets

In the planned economy era, taking plane was a kind of treatment in China.There were few people who can travel by plane and even less people paid attentionto the price of tickets. Single price management system in Chinese civil aviation isthe product of that era: After the 1990s, market economic system was employed inChina. The problem of price appeared following the development and reform ofChina civil aviation, and has been the concern of more and more people and themedia. Let alone "doubl…     

Cooperation Needed

On August 12,, the MA-60, ordered by Sichuan Airlines, was put into formal operation oilthe air route of Chengdu-Nanchong-Chongqing. It meant that the domestic new generation regional aircraft is available for the commercial service.The regional aircraft manufactured by China has had its prosperity. Y-7 started its service inChinese air transport market 15 years ago, and in its hayday, there were over 80 Y-7s in operation,which made great contribution to China's civil aviation development…     

Planting Hopes Yielding the Future

Following the publication of this issue, China Civil Aviation has passed through a whole year. At the threshold of the new century a year ago, Civil Aviation Economics and Technology, which had had more than 20 years in its history of publication and played an important role in instructing the work of civil aviation, was renamed China Civil Aviation upon decision of the CPC Committee of CAAC and approval of the State Press and Publication General Administration. Since then it has gree…     

OVERSEAS BRIEFS

▲Nov. 1 Qantas has installed telephonecommunication systems on all its B747-400s, bywhich passengers can send messages and e-mailsduring the flight.▲Nov. 3 According to IATA, the worldair passenger transport this September grew by1% over the same period of last year, a sign thatthe world air transport industry has basicallystepped out of the shadow of the Iraq War andSARS.▲Nov. 5 According to a new aviation se-curity law approved by the German Cabinet, theGerman Defense Minister …     

Modeling and analysis of oil frictional loss in wet-type permanent magnet synchronous motor for aerospace electro-hydrostatic actuator

To improve the power density and simplify the seal structure, the Wet-Type Permanent Magnet Synchronous Motor(WTPMSM) technique has been applied to aerospace ElectroHydrostatic Actuators(EHA). In a WTPMSM, the stator and the rotor are both immersed in the aviation hydraulic oil. Although the heat dissipation performance of the WTPMSM can be enhanced, the aviation hydraulic oil will cost an extra oil frictional loss in the narrow airgap of the WTPMSM. This paper proposes an accurate oil frictiona...     

Experimental investigation on ice-breaking performance of a novel plasma striker

Aircraft icing has long been a plague to aviation for its serious threat to flight safety.Recently, researches about a newly proposed deicing method based on Plasma Synthetic Jet Actuator(PSJA) have just started. To meet the requirements of in-flight deicing, structure of PSJA needs to be adjusted. This paper completed the detailed design and experimental validation of a novel plasma striker, which was a modified version of PSJA. Influences of mass of the moving part and rod shapes on the ice-br...     

Interference mechanism and damage accumulation in high-speed cross scratches on hard brittle materials

Precision and low damage grinding of aviation optical elements can effectively improve the overall processing efficiency. The mechanism of high-speed cross scuffing of multiple abrasive particles has become an important factor affecting the forming quality of workpiece. Interaction of abrasive trajectory determines machined surface and subsurface morphology and damage.According to the relative motion trajectory of wear particles on the workpiece surface, a theoretical model of the trochoidal tra...     

Design and validation of a variable camber wing structure

Variable camber wing technology is one of the important development trends of green aviation at present.Through smooth,seamless,continuous and adaptive change of wing camber,the aerodynamic performance is improved in achieving increase in lift and reduction in resistance and noise.Based on the aerodynamic validation model CAE-AVM,Chinese Aeronautical Establishment(CAE) has carried out the design and validation of a variable camber wing,proposed an aerodynamic deformation matrix for the leading a...     

Building China''''s “Aircraft Carrier” of Airports

Just when the media show great concern at the civil aviation reform and airline reorganization, China's airport industry, which has long been known for its moderatism in the reform, also highlighted itself recently.The long-awaited alliance of Beliing and Tianjin airports has at last made significant progress. Meanwhile, the alliance or cooperation between Capital cavort and airports in cities like Xi'an, Dalian, Shenyang, Chengdu and Kunndng is also under steady progress. This is only par…     

Management Reform, Fundamental to Enterprises'''' Development

When the reorganization of the 5 civil aviation enterprise groups took shapes,China civil aviation industry makes an important step in the enterprise reform.Soon after that, 6 local airlines signed an agreement on establishing Sky AviationGroup, and expansion has been made in the scale of the discounted air fare. Chinacivil aviation reform, once-called "action with no news", draws all the focuses ofthe public.Chinese air transport industry is not very strong in the world air transportmarket,…     

Breakthrough Needed for the Work of Flight Standard

China civil aviation is at present in a crucial time of reform and development, faced with major tasks of separating business operations from government administration, transferring the responsibilities of the administration, and the strategic regroup of enterprises. The rapid growth of the national economy lays a good foundation for China civil aviation. The economy globalization, the trade deregularization, and the regulation integration brought both the opportunity and the challenge to Chin…     

We Are Full of Hopes

The world civil aviation industry experienced great difficulties in 2001. At the beginning of new century, the world economy was under the dark shadow of slowing growth. By the end of the August 2001, the world air transport industry had recorded a loss of US$three billion with an overall downturn in every economic index of civil aviation. The world-shaking Sept. 11 attacks only made things worse, striking another heavy blow to the already depressed civil aviation industry. Air traffic drop…