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홍성호(Sung-Ho Hong),이재열(Jae-Youl Lee),신동호(Dong Ho Shin),함제훈(Jehun Hahm),서갑호(Kap-Ho Seo),서진호(Jin-Ho Suh) Korean Society for Precision Engineering 2022 한국정밀공학회지 Vol.39 No.5
Drone stations are increasingly being applied to enhance the mission capabilities of drones. The drone’s station landing occurs in a limited space. A relative position communication signal between the drone and the station is required. Strong, precise control over communication signal interference is required. In this paper, we describe a filter processing method for position signal processing. In consideration of the anchor position and installation angle of the UWB module of the drone station, nine performance test cases were proposed. As a result of the performance test, high position accuracy output was confirmed when considering the result of minimizing signal shading and beam pattern direction with excellent reception sensitivity. A performance test was conducted using the developed drone station, and the landing performance was confirmed with a precision of within 20 cm.
영구자석 비선형 자기특성을 고려한 회전자 타입에 따른 모터 특성 분석
박민로(Min-Ro Park),서갑호(Kap-Ho Seo),황성우(Sung-Woo Hwang),임명섭(Myung-Seop Lim) 한국자기학회 2021 韓國磁氣學會誌 Vol.31 No.3
The permanent magnet is an important component that determines the performance and cost of a synchronous motor. Also, the characteristic of the permanent magnet is a major factor in determining the performance of the electric motor. Therefore, to improve the performance of the permanent magnet synchronous motor and reduce the material cost, the permanent magnets having various characteristics are being developed. However, the magnetic properties of permanent magnets have nonlinearity. Therefore, this paper proposes a method to calculate the operating point of a permanent magnet by considering not only the nonlinear magnetic properties of the electrical steel sheet but also the nonlinear properties of the permanent magnet and analyze the characteristics of the electric motor based on this proposed method. Through this, the characteristics of the permanent magnet synchronous motor are analyzed according to the rotor type and the design direction for each type is suggested.
승마 로봇 시뮬레이터 HRB-1을 위한 말의 보행 및 부조의 구현
박용석(Yongsik Park),서갑호(Kap-Ho Seo),오승섭(Seungsub Oh),박성호(Sung Ho Park),서진호(Jin-Ho Suh) 제어로봇시스템학회 2012 제어·로봇·시스템학회 논문지 Vol.18 No.3
Horse riding is widely recognized as a valuable form of education, exercise and therapy. But, the injuries observed in horse riding range from very minor injuries to fatalities. In order to reduce these injuries, the effective horseback riding simulator is required. In this paper, we proposed the implementation method of horse gait and riding aids for horseback riding robot simulator HRB-1. For implementation of horse gait to robot simulator, we gathered and modified real motion data of horse. We obtained two main frequencies of each gait by frequency analysis, and then simple sinusoidal functions are acquired by genetic algorithm. In addition, we developed riding aids system including hands, leg, and seat aids. With the help of a developed robotic system, beginners can learn the skill of real horse riding without the risk of injury.