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4륜구동 인휠 전기자동차의 주행 효율 향상을 위한 구동력 분배 알고리즘
송현우(Hyeonwoo Song),이용관(Yongkwan Lee),백진주(Jinjoo Baek),박종혁(Jonghyuk Park),황성호(Sung-Ho Hwang) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
The purpose of this paper is to construct a control algorithm for improvement in driving efficiency of 4-wheel-drive in-wheel electric vehicles. Main parts of vehicle were modeled and input-output relations of signals were summarized using MATLAB/Simulink. Performance simulator for 4-wheel-drive in-wheel electric vehicles was developed based on co-simulation environment with a commercial dynamic behavior analysis program called Carsim. Also for improvement in driving efficiency of vehicles, a torque distribution algorithm that distributes torque to front and rear wheels was included in the performance simulator. Validity of the torque distribution algorithm was demonstrated based on simulation on changes in SOC caused by use of the torque distribution algorithm.
Hf-doped ZnO 박막 트랜지스터의 Hf 도핑 농도에 따른 시냅틱 특성에 관한 연구
송동영(Dongyoung Song),송현우(Hyeonwoo Song),이인호(Inho Lee),피정석(Jeongseok Pi),최지훈(Jihoon Choi),차단영(Danyoung Cha),이성식(Sungsik Lee) 대한전자공학회 2024 대한전자공학회 학술대회 Vol.2024 No.6
We present a study on a weight-update characteristics which is dependent on a Hf doping concentration in a Hf-doped ZnO (Hf-ZnO) channel layer of synaptic thin-film transistors (Syn-TFTs). Here, when Hf doping concentration is increased, it is known that the disorders (e.g. dangling bond) in Hf-ZnO channel layer are suppressed due to an addition of Hf cation. This can be expected that an electron mobility is improved while reducing sub-threshold slope (SS) because of the decreased parasitic capacitance. With the decreased SS, it can be expected that a weightupdate characteristics (e.g. a dynamic ratio, dr<SUB>w</SUB>) is also more improved due to a relatively high sensitivity. To check these, static and pulsed characteristics are monitored with two cases of the fabricated Syn-TFTs, based on a high doped Hf-ZnO (Hf-ZnO(H)) and low doped Hf-ZnO (Hf- ZnO(L)).
MATLAB/Simulink를 이용한 전기스쿠터용 성능 시뮬레이터 개발
왕빈(Bin Wang),최정훈(JeongHun Choi),송현우(Hyeonwoo Song),황성호(SungHo Hwang) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Recently, due to social problems such as the oil depletion and environmental pollution, the development of electric vehicle has become one of the hot issues. During the initial stage of the electric scooter development, the simulation software is applied to select the component specifications. In order to predict the performances of the selected components, in-wheel electric scooter simulator is developed by using MATLAB/Simulink. The MATLAB GUI environment is constructed to manipulate the user-friendly simulator. By changing the driving conditions and parameters of core components such as motor, battery, etc. the acceleration performance, driving range, and consumed battery SOC can be predicted.
전동 통합 샤시를 이용한 2륜 독립구동 차량의 선회성능 향상에 관한 연구
박진현(Jinhyun Park),최정훈(Jeonghun Choi),송현우(Hyeonwoo Song),황성호(Sung-Ho Hwang) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
In this paper, in an effort to secure based technology to solve performance degradation problem of vehicle’s ride & Handling in independence-driven electric chassis system. To solve this problem, MATLAB/Simulink and Carsim is used to modeling vehicle’s powertrain and complete Ride & Handling Performance evaluation environment each. Ride & Handling performance evaluation environment is completed by co-simulation of two simulation environment. From the simulation results, a torque vectoring control algorithm is verified to improve the vehicle’s ride & handling performance.
전동 통합 샤시를 이용한 2륜 독립구동 차량의 선회성능 향상에 관한 연구
박진현(Jinhyun Park),최정훈(Jeonghun Choi),송현우(Hyeonwoo Song),황성호(Sung-Ho Hwang) 대한기계학회 2013 大韓機械學會論文集A Vol.37 No.7
독립 구동형 전동 통합 샤시 시스템은 시스템 내구 성능 관련 신뢰성 확보, 구동 전동기 고장 시차량 안정성 확보, 차륜 중량 증가에 따른 Ride & Handling 성능 저하 등의 문제로 실제 차량에 적용이 지연되고 있다. 본 논문에서는 이러한 문제들 중 Ride & Handling 문제를 해결하기 위해 차량의 주행성능 평가가 가능한 시뮬레이터를 개발하였다. MATLAB/Simulink를 이용하여 독립구동형 전동 샤시 시스템이 적용된 소형 전기 자동차를 모델링 하였으며, 27자유도의 차량 거동 해석이 가능한 CarSim을 이용하여 차량동역학을 모델링 하였다. 개발된 시뮬레이터를 활용하여 차량의 주행 안정성을 향상을 위한 알고리즘을 개발/검증함으로써 차량의 Ride & Handling 성능 저하 문제를 해결하고자 하였다. An independently driven electric corner module cannot be applied to an actual vehicle without some difficulty, because of vehicle safety problems in the case of malfunctions and degraded ride and handling performance owing to the increase in the unsprung mass. In this study, a simulator is developed to evaluate the vehicle driving performance in order to solve ride and handling problems. Component modeling of a small-sized electric vehicle with an independently driven electric corner module is performed using MATLAB/Simulink. The vehicle is modeled by using CarSim, which can be used to analyze the vehicle maneuvers with 27 DOFs. The control algorithm for the improvement of vehicle driving safety and ride and handling performance is validated by using the developed simulator.