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김혁수(Hyuksoo Kim),김병주(Byungjoo Kim),박기홍(Kihong Park) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The ESP system is a chassis control module that improves the vehicle’s lateral stability by generating a compensating yaw moment with asymmetric brake force distribution among four wheels. The reference vehicle model can affect the overall control performance since the ESP system judges the vehicle stability based upon the model. Currently a 2 DOF bicycle model is most widely used for this purpose due to its simplicity and moderate capability of describing lateral vehicle motions. In this paper, feasibility study of using a 3 DOF vehicle model with roll motion as an ESP reference vehicle model has been conducted. Through simulation, the performance of ESP was compared and discussed when using the reference vehicle models with and without roll motions.
김병주(Byungjoo Kim),노근제(Keunje Noh),김혁수(Hyuksoo Kim),박기홍(Kihong Park) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
This paper proposes an Intelligent Torque Distribution(ITD) algorithm for enhancing the driving performance and cornering stability of a vehicle. In the vehicle’s longitudinal maneuver, the ITD logic improves the acceleration performance by the front/rear torque distribution. In the cornering maneuver, the ITD logic tries to maintain the vehicle’s lateral stability by using the combined torque distribution strategies at for wheels. For the control logics, the PID and the sliding mode control methods were adopted for the longitudinal and lateral controls, respectively. The performance of the ITD system was validated using and independent four wheel drive vehicle model developed with CarSim and Simulink. The simulation results are to be presented and discussed in this paper.
인간공학적 파워시트 조작 스위치 터치 세분화 기술 개발
이백희(Baekhee Lee),김혁수(Hyuksoo Kim) 한국자동차공학회 2021 한국자동차공학회 부문종합 학술대회 Vol.2021 No.6
The present study developed an ergonomic touch segmentation technology of power seat operation switch and validated effectiveness of it. A new moving-type power seat operation switch was developed by applying segmentation of touch sensor inside switch cover according to operation area (e.g., upward, backward). For example, the new switch provides only forward arrow for seat back on AVN when touching backside of reclining switch. Usability of the new segmented moving-type (7.6 ± 1.2 pts) switch was superior compared to new push-type (5.1 ± 2.0 pts) and seesaw-type (6.6 ± 1.1 pts) switches developed in the study. The new segmented moving-type switch was superior 62% for feedback accuracy, 88% for information cognitive ability, 72% for ease of operation, and 150% of overall satisfaction compared to existing moving-type switch. The new segmented moving-type switch can contribute to improving usability of power seat switch operation by providing immediate feedback on AVN during driving/parking conditions.
로봇의 설득의도와 소비자와의 물리적 거리가 소비자의 로봇에 대한 평가와 제품의 구매의도에 미치는 영향
이두황(Doohwang Lee),안정선(Jungsun Ahn),김혁수(Hyuksoo Kim) 한국콘텐츠학회 2021 한국콘텐츠학회논문지 Vol.21 No.3
최근 인공지능 기술의 비약적인 발전에 따라 전천후 로봇 판매원이 실현될 가능성이 부각 되고 있다. 그러나 소비자가 로봇의 설득 메시지를 어떻게 평가하고 반응하는지를 실증적으로 탐구한 연구는 부족하다. 본 연구는 로봇이 제품을 판매하려는 설득 의도를 현저하게 드러내고 로봇과의 물리적 거리가 가까워질 때 소비자의 로봇에 대한 평가와 로봇이 광고하는 제품에 대한 구매 의도에 어떻게 영향을 미칠지를 탐색했다. 이를 위해 2(로봇의 설득의도: 낮음 vs. 높음) × 2(로봇과의 물리적 거리: 보통 vs. 매우 가까움)의 총 4개 집단 간 요인 설계 실험을 진행하였다. 연구결과, 로봇이 드러내는 설득 의도가 높다고 인식할수록 참가자들은 로봇의 전문성과 신뢰성을 낮게 평가하고 로봇이 광고한 제품인 노트북을 구매할 의도도 낮게 보고하는 것으로 나타났다. 한편 참가자들은 로봇이 자신에게 다가오는 거리의 정도와 상관없이 로봇의 전문성과 신뢰성을 비슷하게 평가했지만, 로봇이 자신의 개인 공간으로 가까이 다가올 때에는 로봇에 대하여 더 부정적으로 평가했고 그 제품을 구매할 의도도 낮게 보고했다. The current study explored how robot’spersuasive intent and its’ physical distance affect consumers’ evaluaton on the robot and the product that the robot advertises. This study administered a 2 (level of pursasion intent: low vs. high) × 2 (physical distance: normal vs. close) between-subjects factorial design experiment. The findings revealed that consumers evaluated the robot’ expertise and trustworthiness more negatively and reported lower intentions to buy the produce when they perceived robot’s persasive intent saliently high. Consumers were also found to show more negative attitude toward the robot and lower intentions to buy the produce when the robot approached to their personal space more closely. The theoretical and practical implications about human-robot interaction in marketing context were discussed