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."     

Strong Interest In China''''s Cargo Market——An interview with Jean-Peter Jansen, chairman of the Executive Board of Lufthansa Cargo AG.

Lufthansa Cargo AG ranks top among European airlines in the flights bound for China. It has 14 weekly flights for Hong Kong to transport 720 tons of cargo and mails, nine weekly services for Shanghai to carry 450 tons and four weekly flights for Beijing to handle 250 tons.The carrier is showing strong interest in the Chinese market, for 11 per cent of its sales in 2003, 2.16 billion euro came from China.     

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…     

Airbus'''' 20 Years In China——An interview with Airbus Senior Vice President Laurence

This year is the20th anniversary of Airbus'entry intothe China market.In the past20years,Airbus hasexpanded its business in China by making technologytransfer and efficient industrial co-operation with Chinese aviationmanufacturers.China plays an important role in Airbus'global strategy.The company hopes to further expand the all-round co-operationwith the country.Both sides wish to reach a win-win success inthe future co-operation.On the afternoon of October31,Laurence,senior vicepresiden…     

Joining the World Trade Organization With a Cool Head

On Nov. 11 the Doha meeting completed the formal approval procedures for China to join the WTO, putting a perfect end to the too long wait of the Chinese.15 years have passed since China began its efforts in entering the WTO. China set off on its way to ＂return to the GATT＂ with the development of its reforms in 1986. From that time till its success today, the name of the negotiations changed and the negotiators got old. This process is a memory of vicissitudes.Now the WTO is really …     

DOMESTIC BRIEFS

Dec.1 The new terminal of Chongqing Jiangbei International Airport was turned over from the building unit to the related application unit of the airport for management.Dec.1 CAAC Administration North China issued dangerous articles aviation transport license to Lufthansa Airlines and France Airlines.Dec.2 An aircraft of Cathy Pacific Airlines with 348 passengers from Bangkok to Bombay had an explosion in the left wing engine a few minutes after taking off and then     

Set Sail to Create New Glory

The reform and reorganization of Chinese civil aviation industry into three airtransport groups and three ensurance groups was settled at last. Oct. 11,2002, on which the six groups officially put up their brass plates, will become a milestone in the history of Chinese civil aviation.     

Guide for Authors

1 Chinese Journal of Aeronautics (CJA) is a comprehensive academic journal dealing with the fields of aeronautics and astronautics. The Journal is sponsored by the Chinese Society of Aeronautics and Astronautics. It is a bimonthly journal in English, was founded in 1988, and at present, its issues are released in February, April, June, August, October, and December. The Journal reports the developments of the aeronautical and astronautical researches in China and abroad to     

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…     

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…     

NWA Outlines Its Competitive Advantages In China——An interview with Phil Haan, executive vice president of Northwest Airlines

Phil Haan, executive vice president of international,alliances and information technology of NorthwestAirlines, and chairman of NWA Cargo, outlined theairlines' competitive advantages in the China market as wellas its continued commitment to serving the needs oftravellers in China on April 12 in an interview with AirportJournal.“China is an exciting, growing market and has played akey part in Northwest’s Asia/Pacific passenger and cargonetworks,” Haan said.Northwest Airlines is the wo…     

Tomography system for measurement of gas properties in combustion flow field

This paper describes a self-designed fiber-coupled tomography system and its application in combustion diagnostics. The tomographic technique, which combines tunable diode laser spectroscopy and algebraic reconstruction technique, enables the simultaneous reconstruction of temperature and gas concentration with both spatial and temporal resolutions. The system measures a maximum diameter of 35 cm in a circular area with a minimum spatial resolution of 1 mm×1 mm and temporal response of up to 1 kHz. Simulations validate the effects of the beam arrangement and discrete grid on reconstruction accuracy, and give the optimal beam arrangements. Experiments are made to demonstrate the tomography method, and systems are constructed in laboratory and on engineering test benches.     

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…     

Initial virtual flight test for a dynamically similar aircraft model with control augmentation system

To satisfy the validation requirements of flight control law for advanced aircraft,a wind tunnel based virtual flight testing has been implemented in a low speed wind tunnel.A 3-degree-offreedom gimbal,ventrally installed in the model,was used in conjunction with an actively controlled dynamically similar model of aircraft,which was equipped with the inertial measurement unit,attitude and heading reference system,embedded computer and servo-actuators.The model,which could be rotated around its center of gravity freely by the aerodynamic moments,together with the flow field,operator and real time control system made up the closed-loop testing circuit.The model is statically unstable in longitudinal direction,and it can fly stably in wind tunnel with the function of control augmentation of the flight control laws.The experimental results indicate that the model responds well to the operator's instructions.The response of the model in the tests shows reasonable agreement with the simulation results.The difference of response of angle of attack is less than 0.5°.The effect of stability augmentation and attitude control law was validated in the test,meanwhile the feasibility of virtual flight test technique treated as preliminary evaluation tool for advanced flight vehicle configuration research was also verified.     

Development of PLC-based Tension Control System

Fiber winding tension is an important factor in the molding techniques of composite material which influences the quality of winding product directly, and the tension control is a key technique in fiber winding techniques. This paper introduces a closed-loop tension control system with the programmable logic controller (PLC) with function modules as its control kernel, the alternating current (AC) servo motor as execute element and the radius-following device to accomplish the real-time radius compensation. The mechanism of the tension control system is analyzed and the numerical model is set up. The compensation technique of the radius of the scroll is analyzed. Experimental results show that the system is well qualified with high control precision and high reaction speed.     

Design and Application of a DSP Controller for Giant Magnetostrictive Smart Structure

It is proposed a digital signal processing (DSP) controller used in the control system of six degree-of-freedom (DOF) giant mag-netostrictive smart structure (GMSS). Also are presented the controller design and its implementation, the embedded adaptive least mean-square (LMS) control algorithm and the real-time experiments of GMSS. Three programs are embedded in this controller. Of them are the adaptive LMS control algorithm and the other two which are used to search for the optimal values for the initial weight vectors. Moreover, the work flow and the control approach of the GMSS with the DSP controller are introduced. The experimental results indi-cate that the DSP controller has better control precision and real-time property, and the damping effect is up to 20 dB-30 dB.     

Design and Application of a DSP Controller for Giant Magnetostrictive Smart Structure

It is proposed a digital signal processing （DSP） controller used in the control system of six degree-of-freedom （DOF） giant magnetostrictive smart structure （GMSS）. Also are presented the controller design and its implementation, the embedded adaptive least mean-square （LMS） control algorithm and the real-time experiments of GMSS. Three programs are embedded in this controller. Of them are the adaptive LMS control algorithm and the other two which are used to search for the optimal values for the initial weight vectors. Moreover, the work flow and the control approach of the GMSS with the DSP controller are introduced. The experimental results indicate that the DSP controller has better control precision and real-time property, and the damping effect is up to 20 dB-30 dB.     

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.     

Study of amplification coefficient in a water-cooling Gardon-type heat power measuring apparatus

A new water-cooling Gardon-type heat power measuring apparatus is designed to meet the need of heat power source management and distribution. The steady state measurement mathematic model of the apparatus is built up in theory and the system amplification coefficient is defined as the ratio of the heat power to the temperature difference of the device, with which the value of the measured source power can be calculated easily with the corresponding temperature difference. In order to obtain an optimal heat power measuring system, the coefficients that can influence the relationship between the amplification coefficient, the temperature difference, and the heat power are analyzed. On the basis of these analyses, a set of experimental device is constructed and a number of experiments are carried on. Compared with the input heat power sample data, the error of the experimental measuring results is less than ±2%, and the experimental measuring values are in good agreement with the calculated theoretical ones. The heat power measuring apparatus can be applied in heat flux or heat power measurement in other fields due to its simple structure and high accuracy.     

Characteristics of pulsed plasma synthetic jet and its control effect on supersonic flow

The plasma synthetic jet is a novel flow control approach which is currently being studied. In this paper its characteristic and control effect on supersonic flow is investigated both experimentally and numerically. In the experiment, the formation of plasma synthetic jet and its propagation velocity in quiescent air are recorded and calculated with time resolved schlieren method. The jet velocity is up to 100 m/s and no remarkable difference has been found after changing discharge parameters. When applied in Mach 2 supersonic flow, an obvious shockwave can be observed. In the modeling of electrical heating, the arc domain is not defined as an initial condition with fixed temperature or pressure, but a source term with time-varying input power density, which is expected to better describe the influence of heating process. Velocity variation with different heating efficiencies is presented and discussed and a peak velocity of 850 m/s is achieved in still air with heating power density of 5.0 · 1012W/m3. For more details on the interaction between plasma synthetic jet and supersonic flow, the plasma synthetic jet induced shockwave and the disturbances in the boundary layer are numerically researched. All the results have demonstrated the control authority of plasma synthetic jet onto supersonic flow.