• Title/Summary/Keyword: Flight-axes/Attitude Control Thruster

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Liquid-monopropellant Thrusters for the 3-axis Attitude Control of Space Launch Vehicles -Part 2: A Practical Application of Flight-axes/Attitude Control Thrusters to the Space Launch Vehicle and Their Design Development Localization (우주발사체 3축 자세제어용 단일액체추진제 추력기 -Part 2: 비행축/자세제어용 추력기의 우주발사체 적용과 국내 설계개발)

  • Kim, Jeong-Soo;Bae, Dae-Seok;Jung, Hun;Seo, Hang-Seok;Kim, In-Tae
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2011.04a
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    • pp.179-182
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    • 2011
  • A practical application of flight-axes/attitude control thrusters to the space launch vehicle and their design development localization are investigated and analyzed. Hydrazine thrusters are mostly used in a final stage of space launch vehicles on account of its higher specific impulse and reliability necessary for the precise attitude control attaining the orbit insertion with higher accuracy.

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Pulse-mode Response Characteristics of a Small LRE for the Precise 3-axes Control of Flight Attitude in SLV (우주발사체의 비행자세 3축 정밀제어를 위한 소형 액체로켓엔진의 펄스모드 응답특성)

  • Jung, Hun;Kim, Jong Hyun;Kim, Jeong Soo;Bae, Dae Seok
    • Journal of the Korean Society of Propulsion Engineers
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    • v.17 no.1
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    • pp.1-8
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    • 2013
  • A liquid-monopropellant hydrazine thruster has several outstanding advantages such as relatively-simple structure, long/stable propellant storability, clean exhaust products, and so on. Therefore hydrazine thruster has such a wide application as orbit and attitude control system (ACS) for space vehicles. A hydrazine thruster with the medium-level thrust to be used in the ACS of space launch vehicles (SLV) has been developed, and its ground firing test result is presented in terms of thrust, impulse bit, temperature, and chamber pressure. It is verified through the performance test that the response and repeatability of thrust are very excellent, and the thrust efficiencies compared to its ideal requirement are larger than 93%.

Liquid-monopropellant Thrusters for the 3-axis Attitude Control of Space Launch Vehicles -Part 1: Performance Characteristics and Application of Liquid-monopropellants (우주발사체 3축 자세제어용 단일액체추진제 추력기 -Part 1: 단일액체추진제의 성능특성 및 활용)

  • Kim, Jeong-Soo;Park, Jeong;Jung, Hun;Kam, Ho-Dong;Lee, Jae-Won
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2011.04a
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    • pp.175-178
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    • 2011
  • A performance characteristics and application status of liquid-monopropellants used for 3-axis control thrusters are surveyed, in this paper. Hydrogen peroxide was widely used as monopropellant until mid-1960s, but it is rapidly replaced with hydrazine which has better performance of specific impulse, storability, and so on. Hydrazine is mostly employed as a liquid-monopropellant of satellite, interplanetary spacecraft, and space launch vehicle owing to its moderate performance features.

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