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中国航天（英文版）
中国航天工业总公司
中国航天（英文版）

中国航天工业总公司

李思忠

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中国航天（英文版）/Journal Aerospace China
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    Technical Characteristics and Innovations of the Gravity-1 Launch Vehicle

    HUANG ShuaiBU XiangweiYU JichaoZHAO Yeni...
    3-8页
    查看更多>>摘要：On January 11,2024,the Gravity-1 launch vehicle successfully carried out its maiden flight from a mobile sea platform off the coast of Haiyang in Shandong Province,sending three meteorological satellites,Yunyao-1 satellite No.18-20,into an orbit about 500 km above the ground.The successful debut flight of Gravity-1 broke many records such as the world's largest solid launch vehicle,the first sea-launched strap-on launch vehicle in the world,with the maximum carrying capacity of current commercial launch vehicle in China.This flight marked a big step in the field of China's commercial space launch application.A new breakthrough has been made,which is of great significance for fur-ther expanding China's diversified and large-scale launch capabilities of medium and low orbit satellites,expanding the spectrum of China's launch vehicle types,and promoting the development of space science.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Practice on Gravity-1 Rocket Dynamic Characteristics Design

    BU XiangweiSONG YinghuiHUANG Shuai
    9-17页
    查看更多>>摘要：Since the Dongfeng-2 missile,full-vehicle modal testing has been established as an indispensable part of the development and testing of rocket and missile models.However,as rockets have been developed larger,the cost and duration of such tests have significantly increased,magnifying their impact on model development.This article fol-lows the process of the modal testing practice of the Gravity-1 rocket,reviewing and summarizing the design process of the rocket's dynamic characteristics.Initially,the article introduces common modeling techniques for launch rockets,including the mass-beam model and the hybrid element model.It then discusses the relationship between the structur-al dynamics model of the launch rocket and modal testing,aiming to reduce testing costs through refined structural dy-namics modeling methods.Subsequently,the article describes the dynamic characteristics design process of the Gravi-ty-1 carrier rocket,categorizes structural parameters,and studies how the selection of structural parameters affects the predicted dynamic characteristics of the rocket.Finally,it elaborates on the design of the modal testing scheme and the dynamic characteristics design based on the test data.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Analysis of the Gravity-1 Sea Launch System and Technical Features

    ZHANG TaoHUANG ShuaiMa MaBU Xiangwei...
    18-27页
    查看更多>>摘要：Sea launch has the characteristics of flexible launching points,high landing area safety,and good economy.In recent years,it has become one of the important launch methods.Since 2019,China has carried out a total of 11 successful sea launches.The Gravity-1(YL-1)sea launch system consists of a launch vehicle system and a sea launch platform.The sea launch program includes roll on/roll off boarding,sea mooring,sea maneuvering,anchoring and positioning,system testing,and formal launch.Through the maiden flight of YL-1,the design and manufacturing tech-nology of large tonnage dedicated launch ship,launch vehicle vertical transfer and roll on/roll off boarding technology,anti-shake technology for sea launch,simple inflatable flexible insulation protective cover technology,and remote wire-less measurement and control technology have been fully verified.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Introduction and Prospects of Gravity-1 Launch Vehicle's Sea-Based Three Verticals Testing and Launch Mode

    MA MaBU XiangweiHUANG ShuaiWANG Yonggang...
    28-33页
    查看更多>>摘要：Gravity-1 was the world's first carrier rocket to adopt the sea-based"three vertical"testing launch mode.This article introduces the overall layout of the launch site and the workflow of rocket testing and launch for its maiden flight mission.The process of vertical assembly,vertical testing,vertical transportation,and sea-based hot launches are explained.Additionally,it provides an outlook on the improved"three vertical"testing and launch mode for future mis-sions,such as land-based launches,rapid launches,and remote sea launches.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Trajectory Design and Flight Result of Gravity-1 Launch Vehicle

    FAN ShaobingZHANG ChiZHANG JieXU Guoguang...
    34-39页
    查看更多>>摘要：Gravity-1(YL-1)launch vehicle completed its maiden flight from the Yellow Sea near Haiyang City,Shan-dong Province,on January 11,2024,this mission successfully launched three Yunyao satellites into their 500 km orbit.The YL-1 has a performance of 4.2 tons for 500 km sun-synchronous orbit and 6.5 tons for low Earth orbit.The suc-cess of YL-1 has further enriched China's launch vehicle spectrum,and will facilitate the launch of medium and large satellites and satellite constellations.In this paper,the flight ballistic solution of YL-1 is introduced.The flight trajectory consists of seven flight segments.The trajectory design comprehensively considered the characteristics and safety re-quirements of the vehicle to achieve effective utilization of the performance.Through comparative analysis of the flight trajectory and the predicted trajectory,the result confirmed that the flight trajectory was consistent with the design results,the design methodology was correct,and the flight test met the expected requirements.Subsequently,the ve-hicle will be employed for commercial application launch services.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Solid Rocket Booster Thrust Asynchrony Identification Method for Solid Rocket Bundled Rockets With ESO

    WU KaoZHANG ChiCHEN YanXU Guoguang...
    40-46页
    查看更多>>摘要：The role of the rocket attitude control system is to execute the required maneuvers for guidance and ensure the stability of the rocket's flight attitude.Attitude control technology has always been one of the key technol-ogies for ensuring the success of rocket flights and has been a core topic in carrier rocket technology research.The Gravity-1 solid carrier rocket is the first solid rocket bundled rocket developed by China,adopting a configuration with four boosters and a core stage bundled together.During the actual flight process,the four booster engines are ignited first,and then,in the event of insufficient control force from the boosters,the core stage engine is ignited to participate in control.To address thrust asynchrony during the descent of the four boosters,an Extended State Observer(ESO)is employed in the control scheme for this flight segment.This involves real-time estimation and compensation of atti-tude parameters during flight,identification of thrust asynchrony among the boosters,and simultaneous determination of whether the core stage engine is ignited to participate in control.Through six degrees of freedom simulation analysis and Y1 flight test validation,this method has been proven to be correct and feasible.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Application of Modelica Based Multi-Domain Modeling and Simulation for Gravity-1

    ZHANG ChiBU XiangweiXU LijieWU Kao...
    47-55页
    查看更多>>摘要：In the R&D phase of Gravity-1(YL-1),a multi-domain modeling and simulation technology based on Modelica language was introduced,which was a recent attempt in the practice of modeling and simulation method for launch vehicles in China.It realizes a complex coupling model within a unified model for different domains,so that technologists can work on one model.It ensured the success of YL-1 first launch mission,supports rapid iteration,full validation,and tight design collaboration.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    High Precision Guidance System of the Gravity-1 Launch Vehicle

    ZHANG JieXU GuoguangBU Xiangwei
    56-60页
    查看更多>>摘要：In the development of the Gravity-1 launch vehicle,solid rocket motors without a thrust termination mechanism created great challenges for ascent guidance.To resolve this problem,the Gravity-1 GNC system used cross product guidance in the core 2nd stage,and a nonlinear adaptive guidance algorithm in core 3rd stage,in order to achieve high orbit injection precision.On January 11,2024,the Gravity-1 launch vehicle successfully carried out its maiden flight from a mobile sea platform off the coast of Haiyang in Shandong province,inserting its payload into a low earth orbit at an altitude of 500 kilometers,validating the guidance algorithm.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

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    封2,封3页
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据