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ECU-in-the Loop Simulation을 사용한 운전석 현가제어기의 성능평가
백운경(Baek, Woon-Kyung),이지웅(Lee, Ji-Woong),이종석(Lee, Jong-Suk) 한국소음진동공학회 2007 한국소음진동공학회 논문집 Vol.17 No.12
Repeated hardware tests and tuning, investing cost and time, are usually required to assure a satisfactory performance of the suspension seat. In this study, an EILS(ECU-in-the-loop) method was proposed to develop a controller for a semi-active suspension seat with a MR(magneto-rheological) damper. EILS system was developed using a real-time seat dynamics model communicating with ECU hardwares under a closed loop environment utilizing Matlab/Simulink and xPC $TargetBox^{TM}$. A sky-hook based control algorithm with optimized damping coefficients was verified to reduce the energy consumption and to improve the vibration response performance.
머신러닝 알고리즘을 사용한 웨어러블 스마트 에어백에 관한 연구
김현식,백원철,백운경,Kim, Hyun Sik,Baek, Won Cheol,Baek, Woon Kyung 한국안전학회 2020 한국안전학회지 Vol.35 No.2
Bikers can be subjected to injuries from unexpected accidents even if they wear basic helmets. A properly designed airbag can efficiently protect the critical areas of the human body. This study introduces a wearable smart airbag system using machine learning techniques to protect human neck and shoulders. When a bicycle accident happens, a microprocessor analyzes the biker's motion data to recognize if it is a critical accident by comparing with accident classification models. These models are trained by a variety of possible accidents through machine learning techniques, like k-means and SVM methods. When the microprocessor decides it is a critical accident, it issues an actuation signal for the gas inflater to inflate the airbag. A protype of the wearable smart airbag with the machine learning techniques is developed and its performance is tested using a human dummy mounted on a moving cart.
김민지,배설봉,백운경,주문갑,하경남,Kim, Min J.,Bae, Seol B.,Baek, Woon-Kyung,Joo, Moon G.,Ha, Kyoung Nam 대한임베디드공학회 2015 대한임베디드공학회논문지 Vol.10 No.4
For the tracking of the way-points of hovering AUV (HAUV), we suggest a simple PID controller. The way-points are designed to approach to a virtual underwater structure and the heading angles at each way-point are set to look at the structure in the face. The proposed controller consists of a vertical controller to maintain the depth and pitch angle, and a horizontal controller to move to the desired position as well as to adjust the heading angle of the HAUV. In the simulation using Matlab/Simulink, the HAUV with the proposed PID controller is shown to track all the way-points within 1 m range while maintaining proper heading angle at each way-point.