Ma S.,China Academy of Civil Aviation Science and Technology |
Yang G.,Civil Aviation Administration of China
2016 International Conference on Control, Automation and Information Sciences, ICCAIS 2016 | Year: 2016
Because of the helicopter nonlinear dynamics characteristics, it is very difficult to guarantee system stability by using classical linear system control method, in order to solve this problem, helicopter flight control model is designed and implemented using nonlinear dynamic inversion control methods in this paper. By grouping helicopter state variables, 'Partial Inversion' circuits are divided. The control circuit of each group state variable is designed separately; in the dynamic inversion flight control model, inner circuit is included by outer circuit. In inner and outer circuit, nonlinear system transforms to linear system by feedback linearization method, control parameters can be designed based on linear system theory. By inner and outer circuit computing, helicopter tracking the input attitude angle and the input overload, the flight control model is implemented. The Black Hawk helicopter data is used to validate the dynamic inversion control model, the results show that the output response speed of each control channel is fast, and the response signals follows the input signals quickly and precisely. The nonlinear dynamic inversion flight control model simplifies the helicopter flight control circuit design, various helicopter flexible maneuvers are realized, and the control results are satisfied. © 2016 IEEE.
News Article | May 5, 2017
In what could be the most significant development in global commercial aviation since the prototype of the first Airbus airliner (the A300) made its maiden flight in late 1972, the Commercial Aircraft Corporation of China’s (Comac’s) C919 single-aisle airliner made its first flight, from Shanghai Pudong International Airport, at 14.00 local time on Friday. The new aircraft is powered by two CFM International Leap-1C engines. The flight lasted one hour and 19 minutes, with the aircraft touching down at 15.19 local time. As planned, it kept its undercarriage down for the entire flight. The five-strong flight test crew were charged with checking 15 parameters during the flight, and, after the flight, Comac reported that all these tests had been successfully carried out. Chinese State television reported, before the flight, that the aircraft would not exceed an altitude of 3 000 m and not fly faster than 300 km/h. The company plans a 4 200 flight test campaign, using six aircraft. The C919 is currently scheduled to enter commercial service in 2020 with launch customer China Eastern Airlines. So far, Comac has received orders for 570 of the new airliners from 23 customers, most of them from Chinese airlines and leasing companies. The C919 will be able to carry up to 168 passengers. It will have a range of between 4 075 km and 5 555 km. Chinese media report that a C919 will cost some $50-million, said to be less than half the price of an Airbus A320 or a Boeing 737. Comac has applied for Type Certification for the C919 from both the Civil Aviation Administration of China and the European Aviation Safety Agency. The latter step confirms the company’s intention to market the aircraft internationally. The C919 is, indeed, designed and intended to compete with the Airbus A320 family and the Boeing 737 family. China hopes, in the course of time, to convert the current international airliner duopoly of Airbus and Boeing into a triumvirate, by making Comac a major manufacturer as well. The C919 project was launched in 2008. Originally, it had been hoped that it would make its maiden flight in 2014, but this was postponed to late 2015 and then postponed again. The aircraft was publicly unveiled in November 2015. It was finally moved to the company’s Flight Test Centre in December. In March, the Xinhua News Agency reported that its was technically ready for its first flight. However, the C919 is not the first Chinese-assembled modern commercial jetliner to take to the skies. That honour belonged to an Airbus A320, assembled at the group’s Tianjin Final Assembly Line (FAL). The Tianjin FAL is a joint venture between Airbus, the China Aviation Industry Corporation and the Tianjin Free Trade Zone. (Tianjin lies on the coast of north-east China.) Boeing has signed an agreement with, perhaps ironically, Comac, to set up an Aircraft Completion Centre for the 737, in the city of Zhoushan, south of Shanghai. This centre will not assemble the airliners, however; it will fit out new aircraft assembled and flown in from the US with cabin interiors and paint them in the customer-airlines liveries. Chinese companies also supply components and parts to both Boeing and Airbus.
News Article | December 1, 2016
CALGARY, AB--(Marketwired - December 01, 2016) - FLYHT Aerospace Solutions Ltd. (TSX VENTURE: FLY) ( : FLYLF) (the "Company" or "FLYHT") today announced it has been granted CAAC Part-145 approval by the Civil Aviation Administration of China (CAAC). The approval took almost two years to achieve and now allows FLYHT to repair Automated Flight Information Reporting System (AFIRS™) units and return them to customers in China with an AAC-038 release certificate. The AAC-038 is a maintenance release document that allows for AFIRS 228 installation on Chinese-registered aircraft under the CAAC Part-145 approval. Previously, FLYHT supplied new units for warranty exchange, so this approval will improve efficiency and convenience for Chinese customers by allowing units to be repaired and returned. "FLYHT joins only four other companies in Canada with CAAC Part-145 approval," remarked Vinay Parmar, Quality Assurance Manager at FLYHT. "The approval is an added benefit to airlines and our customers in China who value CAAC approval." FLYHT does not require maintenance approval for countries with whom Canada has bi-lateral agreements as they accept authorized release certificates issued in Canada. China is an important market for FLYHT and does not yet have a bi-lateral agreement with Canada that encompasses the release tags required so the ability to issue an AAC-038 release for repairs performed in Canada is beneficial. This CAAC Part-145 approval is independent of the maintenance repair company contract in the Peoples Republic of China announced on November 28, 2016 and provides further service alternatives for our customers. FLYHT is a leading provider of real-time aircraft intelligence and cockpit communications for the aerospace industry. More than 50 customers, including airlines, leasing companies and original equipment manufacturers, have installed our systems in order to increase safety, improve operational efficiencies and enhance profitability. FLYHT's proprietary technology, the Automated Flight Information Reporting System (AFIRS™), operates on multiple aircraft types and provides functions such as safety services voice and text messaging, data collection and transmission, and on-demand streaming of flight data recorder (black box), engine and airframe data. AFIRS sends this information through the Iridium Satellite Network to FLYHT's UpTime™ ground-based server, which routes the data to customer-specified end points and provides an interface for real-time aircraft interaction. AFIRS has flown over 2.3 million aggregate flight hours and 1.5 million flights on customers' aircraft. FLYHT holds supplemental type certificates (STC) which allow for the installation of AFIRS on 95% of transport category aircraft. Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
News Article | March 1, 2017
LOS ANGELES, March 01, 2017 (GLOBE NEWSWIRE) -- Global Eagle Entertainment Inc. (GEE) (Nasdaq:ENT) (“GEE,” “Global Eagle” or the “Company”), a worldwide provider of end-to-end connectivity and media to the airline, maritime and remote mobility markets, today announced that it received a vendor Supplemental Type Certificate (vSTC) from the Civil Aviation Administration of China (“CAAC”) to install GEE’s Airconnect Global Satellite Connectivity System on Boeing 737 Next Generation (“B737NG”) aircraft in China. The Airconnect product is GEE’s satellite-based broadband internet connectivity system. GEE is the first major aircraft satellite connectivity service provider to receive CAAC approval on the Boeing 737 platform, representing a critical milestone for aviation connectivity development in China. GEE has pursued a long-term growth program in China, including the following: establishment of a Wholly Foreign-Owned Enterprise (WFOE) and GEE’s China Technology Center; local engineering and software development teams; innovative and new revenue generating services that meet local regulations; partnerships with Chinese media and advertising firms; and establishment of multiple teleports with leading Chinese telecommunications partners. The B737 is the backbone of Chinese air networks, with over 1,000 Chinese-registered B737 in service and an additional 500 on order. Today, the B737 accounts for more than 40 percent of all passenger aircraft operated by airlines based in China. In 2016, GEE received CAAC approval for Boeing 777 installations and commenced an inflight connectivity and entertainment commercial trial under license from the Chinese Ministry of Industry and Information Technology. With this new CAAC-approved 737NG vSTC, GEE is able to expand to fleet operations with all Chinese B777 and B737NG operators. CAAC approval also facilitates installations of GEE’s Airconnect product on HNA Group’s Hainan Airlines and Yangtze Airlines as part of GEE’s joint venture with Beijing Shareco, once that JV launches. "Approval of Airconnect for installation on B737NG’s represents a critical milestone for GEE's expansion in the rapidly growing China market," said Joshua Marks, Executive Vice President of Aviation at GEE. "B737NGs are the most popular aircraft operated by Chinese passenger airlines. With the approval of our Airconnect satellite-based connectivity system, GEE is well-positioned to accelerate access to its high quality in-flight connectivity across the Chinese market by supporting the 737 in both retrofit and linefit configurations.” “We are thrilled about the new opportunities for GEE to work closely with our Chinese partners to provide passengers with superior IFEC solutions,” said Jeff Leddy, Chief Executive Officer of GEE. “GEE is also pursuing vSTC authority for Airbus 320s, which account for an additional 30% of the Chinese commercial aviation market. These CAAC approvals enable us to act quickly in the Chinese market and accelerate our product deployments in the region.” GEE’s Airconnect system transforms the flying experience with broadband connectivity, available live streaming of Chinese-language television stations, video-on-demand with Hollywood and Chinese content, games, advertiser-sponsored content, destination guides and moving maps. GEE’s Airconnect product is the first in China to offer full-cabin television streaming and joint advertising. Global Eagle Entertainment Inc. (NASDAQ:ENT) is a leading provider of satellite-based connectivity and media to fast-growing, global mobility markets across air, sea and land. Supported by proprietary and best-in-class technologies, GEE offers a fully integrated suite of rich media content and seamless connectivity solutions that cover the globe. With approximately 1,500 employees and 50 offices on six continents, GEE delivers exceptional service and rapid support to a diverse base of customers around the world. Find out more at: www.geemedia.com. This release contains forward-looking statements within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995, including statements regarding our expansion in the Chinese commercial aviation market, our ability to successfully negotiate, finalize and launch our Beijing Shareco joint venture, our ability to obtain vSTC authority for Airbus 320s and other aircraft in China and our business initiatives and business outlook. These forward-looking statements are based on information available to us as of the date of this release and on our current expectations, forecasts and assumptions, and involve substantial risks and uncertainties. Actual results may vary materially from those expressed or implied by the forward looking statements herein due to a variety of factors, including: our ability to successfully transition the chief executive and chief financial officer roles; our ability to negotiate and consummate the Shareco joint venture transaction and associated investment on the contemplated terms and realize the benefits therefrom; the impact of any regulatory reviews regarding the Company’s expansion of business operations in China (including the vSTC process) and the proposed Shareco joint venture; uncertainties as to the future operating and financial condition of the Shareco joint venture; the impact of any changes in general economic and market conditions; and other risks and uncertainties set forth in our most recent Annual Report on Form 10-K and subsequently filed Quarterly Reports on Form 10-Q. Forward-looking statements speak only as of the date the statements are made. You should not put undue reliance on any forward-looking statements. We assume no obligation to update forward-looking statements except to the extent required by applicable securities laws. If we do update one or more forward-looking statements, no inference should be drawn that we will make additional updates with respect to those or other forward-looking statements.
Sun X.,Beihang University |
Ma Y.,Beihang University |
Liu X.,Civil Aviation Administration of China |
Sun D.,Beihang University
Journal of Aircraft | Year: 2016
A stall inception model of centrifugal compressors is developed on the basis of the global stability analysis in the present paper. This model takes specific flow patterns and impeller geometry into account, which can be used to analyze the effect of blade design parameters on the stall limit of centrifugal compressors. In particular, the body force model and the solution of the stability eigenvalue equation are two important problems to be addressed in this frame. The spectral method and singular value decomposition are used to discrete stability equations to obtain the eigenvalues. By applying conservation laws, a perturbation-response form of the body force, specifically for centrifugal compressor, is also established to simulate blade behavior. Two different forms (the meridional model and the normal expansion model) are derived to make a comparison of grid independence and computation time. The capacity of these models is assessed against the experimental data of a NASA low-speed centrifugal compressor rotor. The results show that these models could be used to predict stall onset with acceptable accuracy and low computational cost. © Copyright 2015 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
News Article | March 1, 2017
CAMBRIDGE, UNITED KINGDOM--(Marketwired - March 01, 2017) - Safran Identity & Security, through its subsidiary Morpho Detection UK Ltd, today announced it has won a competitive tender from the largest airport in Wales, Cardiff Airport, to supply and service CTX 9800 DSi™ hold baggage explosives detection systems (EDS). To help meet UK Department for Transport regulations mandating Standard 3-approved hold baggage screening capabilities effective September 1, 2018, two high-speed CTX 9800 will screen all In-gauge baggage at Cardiff Airport. Ensuring peak performance and maximum uptime, Morpho Detection's network of reliable engineers and technicians will facilitate preventative maintenance and rapid-response capabilities for a minimum of ten years. Cardiff Airport will also utilize MUX™ multiplexing software to enable central station and networking capabilities. Commenting on the airport's transition to Standard 3 hold baggage screening capabilities, Ceri Mashlan, General Manager of Airport Operations at Cardiff Airport said: "With over 50 direct routes and more than 900 connecting destinations worldwide, our passengers and airline partners depend on Cardiff to deliver a world-class airport experience that keeps passengers and planes moving on time. Working with Morpho Detection to realize the full benefits of Standard 3 hold baggage screening is an important part of our plan to attract additional service and grow." Powered by leading-edge Computed Tomography (CT) technology, Morpho Detection's CTX EDS generate unparalleled image quality that results in lower false alarm rates (FAR) and more accurate threat identification. "Morpho Detection commends Cardiff for joining a growing number of airports in the UK and throughout Europe who are jumpstarting the Standard 3 transition process by selecting the CTX platform," said Martin Parker, UK EDS Sales Leader, Morpho Detection. "The scalability and expandable detection library of CTX EDS, combined with an unmatched, local service footprint, helps airports maximize return on investment (ROI) on hold baggage screening infrastructure." Both CTX 5800 and CTX 9800 are approved by the European Civil Aviation Conference (ECAC) as meeting Standard 3 requirements and certified by the U.S. Transportation Security Administration (TSA) and Civil Aviation Administration of China (CAAC). With more than 2,000 units deployed worldwide, Morpho Detection's CTX family of EDS are the most trusted in the world. For more information on Morpho Detection's products, visit www.morphodetection.com. In an increasingly dangerous world, there's no time for downtime. For the past 25 years, authorities across the world have trusted Morpho Detection's deep expertise to design and implement leading-edge detection solutions. Recognized for delivering unparalleled service quality, our global network of expert engineers and technicians provide comprehensive support for every phase of your investment. We're committed to delivering the most effective detection technology, helping security specialists concentrate on what matters most: protecting the public. Discover more about our range of solutions by visiting morphodetection.com. Follow Morpho Detection on LinkedIn and on Twitter @MorphoDetection Morpho Detection is part of Safran Identity & Security, a security business of the Safran group ( : SAF).
News Article | November 30, 2016
Doctors, pilots, air traffic controllers and bus drivers have at least one thing in common — if they’re exhausted at work, they could be putting lives at risk. But the development of a new urine test, reported in the ACS journal Analytical Chemistry, could help monitor just how weary they are. The results could potentially reduce fatigue-related mistakes by allowing workers to recognize when they should take a break. The effects of fatigue have long been recognized and studied as a problem in the transportation and healthcare industries. In the early 2000s, studies published in scientific journals reported that fatigue-related mistakes were linked to thousands of vehicular crashes every year, and were a major concern in patient safety. Weariness can cause anyone on or off the job to lose motivation and focus, and become drowsy. Although very common, these symptoms come with biochemical changes that are not well understood. Zhenling Chen, Xianfa Xu and colleagues set out to determine whether a urine test could detect these changes. The researchers analyzed urine samples from dozens of air traffic controllers working in civil aviation before and after an eight-hour shift on the job. Out of the thousands of metabolites detected, the study identified three that could serve as indicators of fatigue. Further work is needed to validate what they found, the researchers say, but their initial results represent a new way to investigate and monitor fatigue — and help prevent worn-out workers from making potentially dangerous errors. The authors acknowledge funding from the National Natural Science Foundation of China and the Civil Aviation Administration of China.
News Article | November 30, 2016
Doctors, pilots, air traffic controllers and bus drivers have at least one thing in common -- if they're exhausted at work, they could be putting lives at risk. But the development of a new urine test, reported in the ACS journal Analytical Chemistry, could help monitor just how weary they are. The results could potentially reduce fatigue-related mistakes by allowing workers to recognize when they should take a break. The effects of fatigue have long been recognized and studied as a problem in the transportation and healthcare industries. In the early 2000s, studies published in scientific journals reported that fatigue-related mistakes were linked to thousands of vehicular crashes every year, and were a major concern in patient safety. Weariness can cause anyone on or off the job to lose motivation and focus, and become drowsy. Although very common, these symptoms come with biochemical changes that are not well understood. Zhenling Chen, Xianfa Xu and colleagues set out to determine whether a urine test could detect these changes. The researchers analyzed urine samples from dozens of air traffic controllers working in civil aviation before and after an 8-hour shift on the job. Out of the thousands of metabolites detected, the study identified three that could serve as indicators of fatigue. Further work is needed to validate what they found, the researchers say, but their initial results represent a new way to investigate and monitor fatigue -- and help prevent worn-out workers from making potentially dangerous errors. The authors acknowledge funding from the National Natural Science Foundation of China and the Civil Aviation Administration of China. The abstract that accompanies this study is available here. The American Chemical Society is a nonprofit organization chartered by the U.S. Congress. With nearly 157,000 members, ACS is the world's largest scientific society and a global leader in providing access to chemistry-related research through its multiple databases, peer-reviewed journals and scientific conferences. Its main offices are in Washington, D.C., and Columbus, Ohio. To automatically receive news releases from the American Chemical Society, contact email@example.com.
Wang L.-B.,Chang'an University |
Zheng F.,Civil Aviation Administration of China
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | Year: 2015
In order to provide references for section design and in-service bridge evaluation, a long-span PC box girder bridge under cantilever construction was studied. Considering the impact of skeleton on stiffness and sectional area, inner stiff skeleton was transformed into concrete materials in cantilever construction with inner stiff skeleton at closure section. Numerical analysis method was used to analyze the time-varying effect of the structural internal force in the inner stiff skeleton closure section. And the time-varying effect of its stress was also analyzed according to the sub-model method. The results show that the applying of inner stiff skeleton for closure section of girder bridge can achieve better internal force in finished bridge state. In addition, the phenomenon that inner stiff skeleton absorbs effective prestressing becomes prominent along with the growth of the service time, which causes the lack of effective prestressing of girder bridge concrete section in closure section. The stronger the stiffness of skeleton leaves, the smaller the compressive stress of concrete reserves. In the most severe case, it may cause downwarping and crack of the mid-span of in-service bridge, which should be taken into account in design and check calculation. ©, 2015, Xi'an Highway University. All right reserved.
News Article | November 16, 2016
SHANGHAI, Nov. 16, 2016 /PRNewswire/ -- 2016 China International Travel Mart (CITM) was held in Shanghai New International Expo Center from November 11 to 13, 2016. As the largest tourism fair in Asia, CITM this year attracted exhibitors from 106 countries and regions. These exhibitors are from tourism management organizations, tourism associations, travel agencies, tourist attractions, airlines, tourism vehicles and ships companies, hotel groups and tourism resorts. The total number of booths at CITM was over 2,500. China's tourism industry has been continuously growing and has become the drive for China's hospitality industry to innovate and reform. At CITM, hotel groups that are vitally close to tourism also made their grand appearances this year. Jin Jiang International Hotels Management Company Limited ("Jin Jiang International Hotels") and its 18 hotels also set up booths at 1B03 and 4A07, displaying its diversified hotel resources and specialties. It was also the most important and biggest appearance for Jin Jiang at an industrial exhibition this year. After having successfully acquired Louvre Hotels Group from France and strategically investing in Plateno Group, Jin Jiang has expanded its brand scale in a more diversified direction, offering more choices for its partners. At CITM this year, Jin Jiang international hotels booth, covering an area of 100 square meters, was both elegant and stylish, inviting guests to experience amenities and services at Shanghai Jin Jiang Hotel, Shanghai Jin Jiang Tower, Shanghai Jian Guo Hotel, Shanghai Rainbow Hotel, Shanghai Park Hotel, Shanghai Pacific Hotel, Shanghai Paradise Jin Jiang Hotel, Xi'an Jin Jiang International Hotel, Wuhan Jin Jiang International Hotel, Beijing Asia Hotel, Lanzhou Jin Jiang Sun Hotel, Kashi Yuexing Jin Jiang International Hotel, Kunming Jin Jiang Hotel, Nanchang Jin Feng Hotel, Shenzhen Hotel in Beijing, Jin Jiang Sanya Royal Garden Resort, Sanya Jin Jiang Baohong Hotel, and Yang Peng Jin Jiang Hotel in Yangzhou. These hotels are located in hub cities in their own regions, provincial capital cities or famous tourist cities. Some of them have extensive experience in accommodating important guests from home and abroad, some are city landmarks and some are ideal destinations for getaways. The diversified range shows Jin Jiang International Hotels' industrial resources and far-reaching layout. As China has become one of the most important markets in global tourism, CITM is playing a more and more important role in professional tourism fair and exhibition events across the world. CITM this year was co-hosted by China National Tourism Administration, Civil Aviation Administration of China and People's Government of Shanghai. The total exhibition area amounted to 57,500 square meters, accommodating tourism organizations, travel agencies, hotels, airlines and other companies related to tourism from across the world that are expecting to benefit from the rising market in China.