• Title/Summary/Keyword: Separation Device

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Design, Manufacture and Test of Subscale Solid Rocket Motor with Pulse Separation Device (펄스분리장치를 적용한 소형 추진기관의 설계, 제작 및 시험평가)

  • Ryu, Jung-Hun;Lee, Won-Bok;Suh, Hyuk;Kim, Won-Hoon;Oh, Jong-Yun
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2010.05a
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    • pp.133-137
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    • 2010
  • A dual pulse solid rocket motor has several advantages compared to the single one. The range and the terminal velocity of the guided missile can be remarkably increased by the application of the pulse separation device(PSD) to the solid rocket motor which resulted in appropriate thrust distribution. In this study, the subscale dual pulse solid rocket motor with the bulkhead type PSD was designed, manufactured, and fire-tested. The bursting pressure, thermal characteristics, and the structural safety of the PSD were obtained by the tests and the results will be applied to the design of full-scale dual pulse rocket motor.

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Performance Analysis of a Pulse Separation Device for a F-type Multi-Pulse Rocket Motor (F형 다중펄스 로켓모타 적용 펄스분리장치 특성 분석)

  • Lee, Dong-Won;Lee, Won-Bok;Kim, In-Sik;Lee, Bang-Eop
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2012.05a
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    • pp.24-27
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    • 2012
  • In this study, the full scale flight type Dual-Pulse Rocket Motor(DPRM) with the bulkhead type Pulse Separation Device(PSD) was designed, manufactured, and fire-tested. The bursting time and pressure of PSD were analyzed by the pressure, thrust and vibration results of static fire tests and ablation of PSD was measured with 3-D coordinate measuring machine. As a result, PSD requirements, bursting conditions and thermal safety, were satisfied.

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Bursting Performance Analysis of a Pulse Separation Device for a Rocket Motor (추진기관 적용 펄스분리장치의 파열특성 분석)

  • Lee, Dong-Won;Lee, Won-Bok;Kim, In-Sik;Kim, Won-Hoon
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2011.04a
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    • pp.245-248
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    • 2011
  • A multi pulse rocket motor(MPRM) has several advantages compared to the single one. The range and the terminal velocity of the guided missile can be remarkably increased by the application of the pulse separation device(PSD) to the solid rocket motor which resulted in appropriate thrust distribution. In this study, the full scale heavy type dual pulse rocket motor with the bulkhead type PSD was designed, manufactured, and fire-tested. The bursting time and pressure of PSD were analyzed by the pressure, thrust and vibration results of static fire tests. As a result, the design requirement was verified that bursting pressure is lower than 30% of 2nd pulse operating pressure.

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Non-explosive Low-shock Separation Device for small satellite (소형 위성용 비폭발식 저충격 분리장치)

  • Park, Hyun-Jun;Tak, Won-Jun;Han, Bum-Ku;Kwag, Dong-Gi;Hwang, Jai-Hyuk;Kim, Byung-Kyu
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.37 no.5
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    • pp.457-463
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    • 2009
  • This paper describes the development of non-explosive separation(NES) device which can be equipped on a small satellite. It comprises mechanism itself and spring-type shape memory alloy(SMA) actuator. In order to design SMA actuator properly, the necessary actuation force is measured. Based on that result, SMA actuator is designed and fabricated. Finally, SMA actuator and the proposed mechanism are integrated. In order to evaluate performance of the developed NES, we carried out a response time test, preload test and shock level test. In near future, we expect to replace the imported NES device with the developed device.

Implementation of Virtualization-based Domain Separation Security Platform for Smart Devices (안전한 스마트 단말을 위한 가상화 기반 도메인 분리 보안 플랫폼 구현)

  • Kim, Jeong Nyeo
    • Smart Media Journal
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    • v.5 no.4
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    • pp.116-123
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    • 2016
  • Recently, important information related with smart work such as office and video conference are handled in smart device quite a lot compare with before. Also, execution environment of smart devices is getting developed as open software environment. It brought convenience to download and use any kind of application software. By that, security side of smart devices became vulnerable. This paper will discuss characteristics of smart device security technology based on virtualization that is a mobile device platform with isolated secure execution area based on TEE (Trusted Execution Environment). Also, this paper will suggest an implementation method about safe smart device security platform based on domain separation for application software which can be executed in smart devices.

Non-Explosive Actuator Technology for Satellite Applications (인공위성용 비폭발식 분리장치 기술동향)

  • Lim, Jae-Hyuk;Kim, Kyung-Won;Kim, Sun-Won;Lee, Chang-Ho;Rhee, Ju-Hun;Hwang, Do-Soon
    • Current Industrial and Technological Trends in Aerospace
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    • v.7 no.1
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    • pp.97-104
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    • 2009
  • Successful separation of satellites from launch vehicles and release its appendages such as solar arrays and antennas are one of the most important tasks for mission accomplishment during in-orbit maneuver. Especially, specific release devices called NEA(Non-Explosive Actuator) have been widely adopted to perform safe separation and release due to its outstanding performance of low functional shock (below 500g), no contamination and easy handing as opposed to the pyroshock device. In the paper, various kinds of NEA and its history of development are reviewed along with a summary on the domestic research trend.

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The study of PTFE isolator equipped to small satellite launch vehicle to reduce the separation shock (소형 인공위성 발사체 충격저감용 PTFE(테프론) 소재 아이솔레이터 연구)

  • Jeong, Ho-Kyeong;Youn, Se-Hyun;Seo, Sang-Hyun;Jang, Young-Soon;Yi, Yeoung-Moo
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2006.05a
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    • pp.358-362
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    • 2006
  • Pyro-shock generally refers to the severe mechanical transients caused by the detonation of an ordnance device on a structure. Such device on a structure, including linear explosive, and point explosive are widely used to accomplish in-flight separation of structural elements on aerospace vehicle. And they are a significant cause of launch vehicle failures. The launch vehicle being developed in Korea also uses the explosive for separation events. In this paper, the isolator equipped to small satellite launch vehicle made of PTFE(Teflon) is developed to reduce the separation shock. The test to measure dynamic stiffness of PTFE isolator is performed. This test enables us to find the frequency range of PTFE isolator. And,, pyre-shock test using explosive to evaluate the performance of PTFE isolator is executed. from this study, the isolator conformed to frequency range and load requirement is developed using PTFE instead of rubber.

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Mathematical separation behavior modeling for the split-type separation device (스플릿 타입 분리장치의 수학적 동적 분리 거동 모델링)

  • Hwang, Dae-Hyun;Han, Jae-Hung;Lee, Yeungjo;Kim, Dongjin
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2017.05a
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    • pp.423-425
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    • 2017
  • When many space launchers and rockets need to be separated, the pyrotechnic separators have been widely used because of their high reliability and high energy generation. However, intensive pyroshock and debris from the high-explosive type separator may cause fatal damage to the equipment inside of the space launchers or rockets. To solve this problem, a pressure-cartridge type low-impact separator has been developed. In this study, one of the low-impact separators, the split-type pyrolock, was used. We established a mathematical model for the split-type pyrolock that simulates the state of combustion gas and the separation behavior of four independent internal components and verified the mathematical model through comparing with experiment results.

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Separation of Mixed Plastics using the Drum type Tribo-Electrostatic Separation Process (드럼형 마찰대전장치를 이용한 혼합플라스틱의 정전선별)

  • Kim Do Kyun;Cho Hee Chan;Jeon Ho Seok
    • Resources Recycling
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    • v.13 no.1
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    • pp.39-46
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    • 2004
  • Triboelectrostatic separation process is a technology that different particles charged after contact and rubbing different materials are separated in a high electric field. This technology has an advantage in that it can be used for separating non-conducting materials such as plastics unlike other electrostatic separation processes. There are two objectives in this study. One is to develop an effective continuous tribo-electrostatic separation process. The other is to apply the developed device for the separation of mixed plastics. Results show that almost all tested plastics reaches over 95% in yield and grade after separation.