四川九洲空管科技有限责任公司

四川九洲空管科技有限责任公司是四川九洲电器集团有限责任公司的核心下属公司,成立于2010年12月27日,是国内从事雷达、空中交通管制系统、通信设备、导航系统、监视系统及相关装备的设计、制造、安装、销售、服务的高科技企业。Sichuan Jiuzhou Aerocont Technologies Co.,Ltd.established in December 27,2012 is the key subsidiary of Sichuan Jiuzhou Electric     

’95中国民用飞机维修国际研讨会——1995年9月20～22日 中国厦门海景大酒店

SponsorsMaintenance Specialty Committee of China Civil Aviation AssociationXiamen Aviation Industry Co.,Ltd.AssistantsTaikoo (Xiamen) Aircraft Engineering CO.,Ltd.Beijing KaiLan Aviation Technology Development & Services CompanyChina International Symposium on Civil Airplane Maintenance ’95 will be held inXiamen China on September 20～22,1995.Representative from all domestic Airlines and maintenance facilities are expected to attend the con-ference and deliver their speeches,also,CAAC and the departments concerned will send their offi-cials to participate in due time.During the symposium the following subjects will be extensivlystudied and explored:the present status and the requirement of civil aircraft maintenance operations     

Efforts To Build Shanghai Into An Airport Hub

Shanghai is a city that boasts two civil international airportsin Mainland China.One is Pudong International Airportin the east of the city and the other is HongqiaoInternational Airport in the west.In order to suit the new pattern of``one city,two airports,'the Shanghai Airport(Group)Co Ltd was set up on May28,1998upon the approval of the Shanghai government to manage thetwo international airports.In the past years,the two airports have been adhering to theenterprise spirit of``working…     

A New Page For Shanghai Airports

The Shanghai Airport(Group)Co Ltd,set up onMay28,1998with approval of the ShanghaiMunicipal government,is China's first of the kindgoverned by local governments.In the past eight years,the company has written acolourful page in the history of the development ofShanghai airports.Shanghai airports have made historic achievementsin aviation transport,becoming one of the world's topairports.Their flights have risen from128,000to375,000,passengers from13.71million to41.34million,and cargoand ma…     

Revisit Xiaoping''''s Villagers

Paifang Village in Guang'an County, Sichuan Province is the home village of Deng Xiaoping, who was the chief designer of China's opening, reform and modernization.Twelve years ago, the reporter came to the village to interview the farmers who were waked up by the opening and reform policy.Twelve years later, the reporter revisited the village but all these shabby houses have been     

LES of film cooling for different jet fluids

The present paper investigates the impact of the velocity and density ratio on the turbulent mixing process in gas turbine blade film cooling.A cooling fluid is injected from an inclined pipe at α=30° into a turbulent boundary layer profile at a freestream Reynolds number of Re∞=400000.This jet-in-a-crossflow(JICF) problem is investigated using large-eddy simulations(LES).The governing equations comprise the Navier-Stokes equations plus additional transport equations for several species to simulate a non-reacting gas mixture.A variation of the density ratio is simulated by the heat-mass transfer analogy,i.e.,gases of different density are effused into an an air crossflow at a constant temperature.An efficient large-eddy simulation method for low subsonic flows based on an implicit dual time-stepping scheme combined with low Mach number preconditioning is applied.The numerical results and experimental velocity data measured using two-component particle-image velocimetry (PIV) are in excellent agreement.The results show the dynamics of the flow field in the vicinity of the jet hole,i.e.,the recirculation region and the inclination of the shear layers,to be mainly determined by the velocity ratio.However,evaluating the cooling efficiency downstream of the jet hole the mass flux ratio proves to be the dominant similarity parameter,i.e.,the density ratio between the fluids and the velocity ratio have to be considered.      

High-cycle fatigue behavior of Co-based superalloy 9CrCo at elevated temperatures

A modified model is developed to characterize and evaluate high-cycle fatigue behavior of Co-based superalloy 9CrCo at elevated temperatures by considering the stress ratio effect. The model is informed by the relationship surface between maximum nominal stress, stress ratio and fatigue life. New formulae are derived to deal with the test data for estimating the parameters of the proposed model. Fatigue tests are performed on Co-based superalloy 9Cr Co subjected to constant amplitude loading at four stress ratios of 1, 0.3, 0.5 and 0.9 in three environments of room temperature(i.e., about 25 °C) and elevated temperatures of 530 °C and 620 °C, and the interaction mechanisms between the elevated temperature and stress ratio are deduced and compared with each other from fractographic studies. Finally, the model is applied to experimental data, demonstrating the practical and effective use of the proposed model. It is shown that new model has good correlation with experimental results.     

爱浪打造高科技音响平台

中美合资美加科技爱浪音响[H G International (Zhongshan)Co.,Ltd.],前身为爱浪科技(中山)有限公司,旗下包括爱浪、威莱、山水三大音响品牌.     

Adam''''s Bond With the Orient

After having an interview with Adam Diels, CEO of Chinesetolk & vertaalbureau Dong Fang Yuan Co., I was deeplymoved by his consistent effort to realize his orientaldream he had at the age of seven. Few would do it like him.Adam was born in a small town, called Nijmegen, in theNetherlands in 1968. His parents were accustomed to tasting alldifferent food from all over the world. Some day, three of themcame to a Chinese restaurant, when Adam saw the boss wasreading a newspaper, which was fu…     

Modeling and simulation of a time-varying inertia aircraft in aerial refueling

Studied in this paper is dynamic modeling and simulation application of the receiver aircraft with the time-varying mass and inertia property in an integrated simulation environment which includes two other significant factors, i.e., a hose–drogue assembly dynamic model with the variable-length property and the wind effect due to the tanker's trailing vortices. By extending equations of motion of a fixed weight aircraft derived by Lewis et al., a new set of equations of motion for a receiver in aerial refueling is derived. The equations include the time-varying mass and inertia property due to fuel transfer and the fuel consumption by engines, and the fuel tanks have a rectangle shape rather than a mass point. They are derived in terms of the translational and rotational position and velocity of the receiver with respect to an inertial reference frame. A linear quadratic regulator(LQR) controller is designed based on a group of linearized equations under the initial receiver mass condition. The equations of motion of the receiver with a LQR controller are implemented in the integrated simulation environment for autonomous approaching and station-keeping of the receiver in simulations.     

Road To Growth A story about Xiangyin Group

The Shanghai Airport Co Ltd set up guide posts at arrival and departure halls to provide information for passengers when Pudong International Airport was put into operation in August, 1999. In 2001, international flights at Hongqiao Airport were moved to Pudong Airport. With a big increase of flights at Pudong Airport, the company set up information desks at the     

DOMESTIC BRIERS

▲Jun. 1Air China Cargo Co. Ltd.implemented air carriers receiving regula-tions officially in order to make its cargotransportation clearing management compat-ible with the international practice.▲Jun. 8 Two individually-runenterprises, Chunqiu Airlines and AukaiAirlines, got the approval from CAAC toestablish.▲Jun. 8 Hainan Airlines entrustedCivil Aviation University of China (CAUC)to train the first pilot students with 4-yearundergraduate courses of the common higheducation.▲J…     

国际航空航天公司产品服务指南

CFM Iflterflatioflal一CFM国际公司Claverham GrouP Ltd.,FHL一Claverham集团有限公司Closed Stoek Co.l,Aviastar一SPI,,Marketing and SalesDePartment一Closed Stoek公司”Aviastar一SP”市场销售部Commercial AeroSPace ServicesCo.Ltd.一商业航宇服务有限公司Crane AeroSPace&Eleetronics一Crane航宇和电子公司一伊斯曼·柯达公司E flViroflmefltal TeCtofliZSCorP.,Airerew Trainingystems,,*砂环境构造公司机组训练系统分部澎罐鄂耀粼瓢瓤弃Dayton一Granger Ine一代顿一农人公司礴缨黝毒黝鑫Eastmafl Kodak…     

Logistics:A New Growth Point for Civil Aviation

Logistics was frequently discussed in civil aviation news on June 6.One item said Dahang International Cargo Corporation controlled by Shang-hai Airlines had signed joint-venture agreement with Hitachi Logistics. Anotherwas about the establishment of Capital Airport Logistic Center with a joint invest-ment of 2.3 billion yuan by Air China, Capital Airport and Hong Kong Sun HungKai Beijing Logistics Ltd. It is said after this project, which mainly carries outdomestic transportation, is in operation in the second half of this year, it will     

Shanghai Airport Co Ltd Wins "China Quality Management Award"

China Quality Management Award 2004, which isnoticeable to Chinese enterprises, was unveiledin Beijing on September 28. Shanghai InternationalAirport Co Ltd, together with other seven enterprises, wonthe award, becoming the first winner in China's civil aviationsector. The award was issued by Li Zhaozhuo, vice chairmanof the Chinese People's Political Consultative Conference.On September 30, the company held a welcomeceremony and a press briefing at Pudong Airport with itssenior manage…     

Hand in Hand of Airlines and the Bank

OnAngust13,ChinaEasternAirGroupandChinaEasternAirlinsCo.,Ltd.signedanagreementoftheentirecooperationwithIndustrial&CommerialBankofChina,whichstipulatedthatthebankwouldofferChillEastemaeredhatofRMB30billionyuanandtheall-aroundfinancialservicetill2000.Accodringtotheagreement,ChinaEastheAirlinesCo.,Ltd.,thecoreofthegroup,willreceiveanaircraft-leasingguaranteecreditlindtof$2.5billionandcreditlndofloansinforeignexchangeofRMB9billionyuan,besides,theothersubsidiariesofthegroupwillbeoffereda…     

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…     

OVERSEAS BRIEFS

▲June 1 US said it plans to joinUzbekistan in its aircraft manufacturing. The USTrade and Development Bureau had allocatedUS$2.6 billion for the phase-I jointmanufacturing of Il-114 medium-sized aircraftin Uzbekistan.▲June 1 Ameriflight Japan Branch tookits new name Menlo Worldwide Japan Co.,becoming the first branch of Ameriflight thathad completed brand change.▲June 2 Singaporean Transport Ministersaid the country would allocate 10 millionSingapore dollars in an airline capaci…     

Modeling of a space flexible probe–cone docking system based on the Kane method

Recent developments in micro- and nano-satellites have attracted the interest of the research community worldwide. Many colleges and corporations have launched their satellites in space. Meanwhile, the space flexible probe–cone docking system for micro- and nano-satellites has become an attractive topic. In this paper, a dynamic model of a space flexible probe–cone docking system, in which the flexible beam technology is applied, is built based on the Kane method. The curves of impact force versus time are obtained by the Lagrange model, the Kane model, and the experimental method. The Lagrange model was presented in the reference and verified by both finite element simulation and experiment. The results of the three methods show good agreements on the condition that the beam flexibility and the initial relative velocity change. It is worth mentioning that the introduction of vectorial mechanics and analytical mechanics in the Kane method leads to a large reduction of differential operations and makes the modeling process much easier than that of the Lagrange method. Moreover, the influences of the beam flexibility and the initial relative velocity are discussed. It is concluded that the initial relative velocity of space docking operation should be controlled to a certain value in order to protect the docking system. a 2014 Production and hosting by Elsevier Ltd. on behalf of CSAA BUAA.     

A novel in-plane mode rotary ultrasonic motor

Ultrasonic motors have the merits of high ratio of torque to volume, high positioning precision, intrinsic holding torque, etc., compared to the conventional electromagnetic motors. There have been several potential applications for this type of motor in aerospace exploration, but bearings and bonding mechanism of the piezoelectric ring in the motors limit the performance of them in the space operation conditions. It is known that the Langevin type transducer has excel- lent energy efficiency and reliability. Hence using the Langevin type transducer in ultrasonic motors may improve the reliability of piezoelectric motors for space applications. In this study, a novel in-plane mode rotary ultrasonic motor is designed, fabricated, and characterized. The proposed motor operates in in-plane vibration mode which is excited by four Langevin-type bending vibra- tors separately placed around a ring-shaped stator. Two tapered rotors are assembled to the inner ring of the stator and clamped together by a screw nut. In order to make the motor more stable and convenient to fix, a thin cylindrical support is placed under the stator ring. Due to its no-bearing structure and Langevin transducer excitation, the prototype ultrasonic motor may operate well in aeronautic and astronautic environments.