Fengyun Satellites: Achievements and Future

Chinese meteorological satellite, Fengyun (FY) Satellite, has a polar-orbiting series and a geostationary series. Up to now, 5 polar-orbiting (FY-1A/B/C/D and FY-3A) and 5 geostationary (FY-2A/B/C/D/E) satellites were launched. FY data has been being intensively applied not only to meteorological monitoring and prediction but also to many other fields regarding ecology, environment, disaster, space weather and so and. The FY data sharing system, FengyunCast, is now one of the three components of global meteorological satellite information dissemination system, GEONETCast. The first satellite of the new generation polar-orbiting series, FY-3A, was launched on 27 May, 2008, demonstrating the FY polar-orbiting satellite and its application completed a great leap to realize three-dimensional observations and quantitative application. The first of the next generation geostationary series (FY-4) is planned to launch in 2014.      

DESIGN OBJECT MODEL AND DESIGN PROCESS MODEL OF COMPUTER AIDED AIRCRAFT CONCEPTUAL DESIGN SYSTEM

ＤＥＳＩＧＮＯＢＪＥＣＴＭＯＤＥＬＡＮＤＤＥＳＩＧＮＰＲＯＣＥＳＳＭＯＤＥＬＯＦＣＯＭＰＵＴＥＲＡＩＤＥＤＡＩＲＣＲＡＦＴＣＯＮＣＥＰＴＵＡＬＤＥＳＩＧＮＳＹＳＴＥＭＳｈｅｎＺｈａｎｇ（ＡｉｒｃｒａｆｔＣＡＤＲｅｓｅａｒｃｈＣｅｎｔｅｒ，Ｂｅｉｊｉｎ...     

NUMERICAL INVESTIGATION OF UNSTEADY DROPLET COMBUSTION PROCESS IN HOT QUIESCENT AIR ENVIRONMENTS (HQAE)

ＮＵＭＥＲＩＣＡＬＩＮＶＥＳＴＩＧＡＴＩＯＮＯＦＵＮＳＴＥＡＤＹＤＲＯＰＬＥＴＣＯＭＢＵＳＴＩＯＮＰＲＯＣＥＳＳＩＮＨＯＴＱＵＩＥＳＣＥＮＴＡＩＲＥＮＶＩＲＯＮＭＥＮＴＳ（ＨＱＡＥ）ＺｈｕＧｕａｎｇｓｈｅｎｇ，ＬｉｎＪｕｎｙｉ，ＺｈａｎｇＹｕｅｌｉｎ...     

EXPERIMENTAL STUDY OF FRETTING WEAR OF TITANIUM ALLOY BEFORE AND AFTER LASER BEAM QUENCHING

ＥＸＰＥＲＩＭＥＮＴＡＬＳＴＵＤＹＯＦＦＲＥＴＴＩＮＧＷＥＡＲＯＦＴＩＴＡＮＩＵＭＡＬＬＯＹＢＥＦＯＲＥＡＮＤＡＦＴＥＲＬＡＳＥＲＢＥＡＭＱＵＥＮＣＨＩＮＧＤａｉＺｈｅｎｄｏｎｇ，ＴａｎｇＹａｘｉｎｇ，ＺｈａｎｇＨｏｎｇ，ＷａｎｇＭｉｎ（Ｄｅｐａｒｔ...     

OPTIMAL CONTROL OF REDUNDANT ROBOTS WITH LOCAL DEGREES OF FREEDOM

SupportedbytheNationalNaturalScienceFoundationofChinaRedundantrobotsprovideflexibilityinavarietyoftasks.Methedsusedtodevelopthere-dundancycontrolarewellknown[1~4J-Inthesemethods,kinematicflexibilityisensuredwhiledynamicperformanceisbeingimproved.Itisverydifficult,however,toimplementoptimalredundancycontrolthatsimultaneouslyincludesbothkinematicsanddynamics(dual-optimiza-tion)forrobotmechanismsthathavebeenpreviouslydeveloped.Inthefollowingsections,aredundantrobotmechanismhavinglocaldegreesof…     

RESEARCH ON PREVIEW CONTROL TECHNIQUE BASED ON EXTENDED ERROR SYSTEM WITH DELAY

Previewcontroltheoryisbeingperfectedwiththedevelopmentofautomaticcontroltheo-ryandengineeringappliedtechnique.Intheearly196Os[l],thepreviewcontrolthoughtwasfirstproposed,butpreviewcontrolhasbeennoticedasanewmethod.Atfirst,thebasicthoughtistodecreasetheerrorbetweenthedesireandoutputthroughconsideringprevious,currentandfuturedesire[2J.Infact,thepreviewcontroltheoryhasbecomeanewstartingpointofoptimaltrackingcontrolproblems.Thebasicstructureofpreviewcontrolisverysim-ple:itisprefedcompensatedcontr…     

Comparison Structure Forms Between Isogrid and Orthogrid of C/ E CompositeTrellis Wound Structure Based on Calculation of Load Carrying

This paper calculated load carrying of isogrid and orthogrid of carbon epoxy composite trellis wound
structure (C/ E CTWS) using non linear finite element method. Based on the analysis, test cases were designed and
tests of axial compression were carried. Analysis result and test result fit well. In order to be used in the project, this
kind of structure cut out repairing was calculated. The method presented in this paper has been proved and can be used
to solve complicated engineering problems. According to calculations and experimental results combined with applica
tion, a principle of choosing wound structure is obtained and principle could be applied to engineering.
     

Cooperative differential games guidance laws for multiple attackers against an active defense target

This paper is concerned with a scenario of multiple attackers trying to intercept a target with active defense. Three types of agents are considered in the guidance: The multiple attackers, the target and the defender, where the attackers aim to pursuit the target from different directions and evade from the defender simultaneously. The guidance engagement is formulated in the framework of a zero-sum two-person differential game between the two opposing teams, such that the measurements on the m...