• Aerospace Industry
• /
• v.84
• /
• pp.4-9
• /
• 2004

KMH, 즉 한국형 다목적헬기의 개발사업이 시작되었다. 지난 10여년동안 500MD 후속기, 경전 헬기, 소형다목적헬기 등 다양한 이름으로 획득방안이 거론되었지만, 이제야 가시적인 모습을 갖추고 사업을 준비중에 있다. 사업의 소개의 앞서 한국형 다목적헬기라 명명하게 된 배경을 알아보면 한국형은 우리의 고유브랜드로 개발하고 개발된 헬기의 주사용여건이 백두대간을 중심으로 이어진 산악과 계곡, 수시로 변하는 계곡속의 골바람, 계곡의 협소한 기동공간에서도 원활한 비행이 가능한 규모 및 기체구조 등을 고려하여 개발한다는 의미로 사막이나 대평원에서 운용하는 헬기와는 크기, 엔진추력 등 많은 부분이 상이한 특성을 필요로 하기 때문에 붙여졌다.<중략>

• Current Industrial and Technological Trends in Aerospace
• /
• v.6 no.2
• /
• pp.133-142
• /
• 2008

We study the possibility of entering into helicopter market with respect to demand, industry structure and infrastructure. In conclusion, it is possible to enter into it based on domestic demand if we complement some technology, financial assistance system and helicopter operation related regulation. Strategy is made for helicopter industry to be a growth driver and then we suggest five projects to carry out it. Those are lasting creation of helicopter demand, possession of core part material and competitive technology, construction of airworthiness certification system and infrastructure for activation of helicopter operation, improvement of financial assistance system and finally strengthening policy modulation between civil, army, and government.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
• /
• v.11 no.1
• /
• pp.68-75
• /
• 2000

In this paper, we analyzed the radiation patterns of a monopole antenna mounted on cylinder and EM penetration problems in the complex structures by using FDTD method associated with 3-D PML absorbing boundary condition. In order to validate the proposed FDTD code, the radiation patterns of monopole antenna mounted on cylinders were compared with the exact Carter's solutions. As a results, the predicted radiation pattern exhibited excellent agreement with exact solution. And the FDTD code is applied to analyze the EM penetration problems in complex structures, Blackhawk helicopter. As the plane wave is excited, a significant amount of energy penetrates the helicopter structure, and it is dependent on aperture/airframe interface.

• Journal of the Korean Society for Aeronautical & Space Sciences
• /
• v.41 no.12
• /
• pp.987-993
• /
• 2013

Korean Utility Helicopter(KUH) is the first korean-developed helicopter. Its first flight was performed in March 2010 and then its development was completed successfully by June 2012. During flight test phase, KUH faced various vibration problems and appropriate vibration-reduction devices were designed and applied to solve the problems. The vibration-reduction devices were applied to main rotor blades, main gear box(MGB) supporting structure, cockpit, cabin and pilot seats to reduce rotor-induced 4/rev vibration. Also, dome-fairing was introduced in order to reduce the tail-shake vibration. This paper shows design technique and flight test results for vibration-reduction devices that have been incorporated into KUH.

• Proceedings of the Korean Society For Composite Materials Conference
• /
• 1999.11a
• /
• pp.53-56
• /
• 1999

헬기 로터깃은 최초로 항공기의 일차구조물로 사용된 대형 복합재료구조물이다. 헬기 로터깃은 운용기간(service life)동안에 $10^{7}$이나 $10^{8}$의 high-cycle 피로환경을 경험가게 된다. 로터깃은 복합재료가 알맞게만 사용된다면 거의 무한대의 피로수명을 갖게된다고 알려져 있다.

• The Journal of Aerospace Industry
• /
• s.65
• /
• pp.1-26
• /
• 2003

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.20 no.10
• /
• pp.1860-1866
• /
• 2016

Helicopter-related collision accidents with structures mostly occur at landing, especially in a limited visibility environment, which necessitates some secondary equipment like a radar that can generate stationary clutter image. In this paper, we propose an algorithm that makes an image of stationary ground clutter in two dimensional range and azimuth angle domain. We present a mathematical model for the received signals from each clutter patch in the iso range ring and analyze their clutter and Doppler characteristics, assuming that a helicopter-borne radar has a rotational antenna. We propose a filter structure, which suppresses side lobe signal components while extracting a main lobe signal component, and suggest a solution for a problem stemmed from the filtering process. Finally, by conducting a simulation we show the performance of the suggested imaging algorithm on a two dimensional virtual scenario of the topographic clutter.

• Journal of the Korea Institute of Military Science and Technology
• /
• v.14 no.4
• /
• pp.598-606
• /
• 2011

The importance of avionics systems has increased to a significant level in modern aircraft development. Modern avionics system is a complex integrated system of state-of-art hardware and software technology. Specifying the avionics system architecture is the most important task throughout the avionics system design process. This paper reviews modern avionics system architectures and proposes an effective avionics architecture suitable for modern attack helicopters.

• Transactions of the Korean Society for Noise and Vibration Engineering
• /
• v.14 no.11
• /
• pp.1129-1136
• /
• 2004

The structural modification to install a heavy sensor was made at the front extremities of the foreign-produced helicopter operated in the Korea Navy Mounting the sensor directly to the nose structure is unlikely to be practical because it lowers a dynamic mode of the airframe close to rotor blade passing frequencies, leading to increased helicopter vibration. Unfortunately we have no information on dynamic characteristics of the imported helicopter. So the experimental modal model derived from shake testing on the overall airframe of a working helicopter was used to solve the sensor Installation problems. The sensitivity analysis was done to evaluate what the best of modification woo)d be. Simple ID model and experimental modal data for mount system with sensor were Incorporated into overall dynamic model to assess the effects of the sensor installation on helicopter. Modal testing for the modified helicopter shows that the airframe modes are sufficiently displaced from rotor passing frequencies. The mount system has been proven fight to be sufficiently stable to meet vibration-level requirement for all required operational profiles.

• Aerospace Industry
• /
• s.88
• /
• pp.50-51
• /
• 2005

국내 첫 초음속기 T-50 양산 1호기 출고/국산 전술통제기 1호기 KO-1출고/대한항공,대파된 미 공군 HH-60G 탐색구조헬기조기 수리 납품 달성/대한항공, B717 기수동체 최종호기 납품/국산 스텔스 무인전투기 개발/토종 기상위성 첫 수출/국내 첫 우주발사체 추적소 제주에 건설