내연기관 기반 드론용 하이브리드 엔진 시스템 설계 = The Design of a Hybrid Engine System Based on a Reciprocal Engine For Unmanned Aerial Vehicles

다국어 초록 (Multilingual Abstract)

This research illustrates how the hybrid engine system comprising of a two-cycle reciprocal engine with an integrated generator and a battery is prepared for the design process. The purpose of this research is to increase flight endurance taking advantage of the high energy density of hybrid propulsion systems as well as to cope with current environmental issues by reducing fossil fuel. The hybrid system is designed to offer 6 kW power, and the power can be adjusted by controlling the engine’s RPM in accordance with load variations. In addition, the battery is adopted to offer extra electric power that this hybrid system cannot cover, and can function as the main power source in limited time in the case of an emergency situation. Besides that, the generator is directly mounted on an engine crank-shaft, and in turn, they can share the same RPM. Thus, it is hypothesized that this integration method can make a compact design possible by reducing space for the installation in the fuselage of UAVs.

국문 초록 (Abstract)

본 논문은 2행정 피스톤 엔진 기반 발전기 및 배터리로 구성된 드론용 전기추진시스템 설계 과정에 대해 다룬다. 연구의 목적은 하이브리드 시스템의 높은 에너지 밀도를 이용하여 비행시간을 증가 시키고 화석연료 사용량을 줄임으로써 환경 변화에 대처함에 있다. 시스템은 6 kW의 출력을 생산할 수 있고, 엔진 RPM 제어를 통해 부하 요구에 맞는 출력 조절이 가능하다. 또한 배터리를 추가 장착함으로써 출력 보완재 역할 뿐만 아니라 비상시 제한된 시간 내 주 전력으로 사용할 수 있다. 또한 발전기를 엔진 크랭크축에 직접 연결함으로써 설계 복잡성을 줄여 동체 내 공간 활용성을 증대 시켰다.

참고문헌 (Reference)

1 B. G. Gang, "Transient behavior of proton exchange membrane fuel cells over a cobalt-phosphorous/nickel foam catalyst with sodium borohydride" 41 : 524-533, 2016

2 J. Yun, "The Piston Motion Variation Affected by Spark Timing and Equivalence Ratio in a 2-Stroke Linear Engine" 2019

3 K. Kim, "Technology Trends on the Electric Propulsion System for Aircraft" 14 (14): 70-82, 2016

4 W. Kim, "Generating Power Design of 5 kW Serial Hybrid Engine for Electrical Propelled Aircraft" Korean Society of Propulsion Engineers 2018