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타이어 압력 변화에 따른 1/4 MR 댐퍼 차량의 승차감 고찰
맹영준(Young-Jun Maeng),성민상(Min-Sang Seong),최승복(Seung-Bok Choi) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.10
This paper presents ride comfort characteristics of a quarter-vehicle magneto-rheological (MR) suspension system with respect to different tire pressure. As a first step, controllable MR damper is designed and modeled based on both the optimized damping force levels and mechanical dimensions required for a commercial full-size passenger vehicle. Then, a quarter-vehicle suspension system consisting of sprung mass, spring, tire and the MR damper is constructed. After deriving the equations of the motion for the proposed quarter-vehicle MR suspension system, vertical tire stiffness with respect to different tire pressure is experimentally identified. The skyhook controller is then implemented for the realization of the quarter-vehicle MR suspension system. Finally, the ride comfort analysis with respect to different tire pressure is undertaken in time domain. In addition, a comparative result between controlled and uncontrolled is provided by presenting vertical RMS displacement.
타이어 압력 변화에 따른 1/4 MR 댐퍼 차량의 승차감 고찰
맹영준(Maeng, Young-Jun),성민상(Seong, Min-Sang),최승복(Choi, Seung-Bok),권오영(Kwon, Oh-Young) 한국소음진동공학회 2011 한국소음진동공학회 논문집 Vol.21 No.12
This paper presents ride comfort characteristics of a quarter-vehicle magneto-rheological(MR) suspension system with respect to different tire pressure. As a first step, controllable MR damper is designed and modeled based on both the optimized damping force levels and mechanical dimensions required for a commercial full-size passenger vehicle. Then, a quarter-vehicle suspension system consisting of sprung mass, spring, tire and the MR damper is constructed. After deriving the equations of the motion for the proposed quarter-vehicle MR suspension system, vertical tire stiffness with respect to different tire pressure is experimentally identified. The skyhook controller is then implemented for the realization of the quarter-vehicle MR suspension system. Finally, the ride comfort analysis with respect to different tire pressure is undertaken in time domain. In addition, a comparative result between controlled and uncontrolled is provided by presenting vertical RMS displacement.
AI 기반 사상압연 제어 시스템을 위한 데이터 분석 및 인자 도출에 관한 연구
성시민,맹영준,서상진,박민수,장규진,박춘수,김길수 대한산업공학회 2023 대한산업공학회 춘계학술대회논문집 Vol.2023 No.5
최근 제조 분야에서 인공지능을 통한 공정 지능화 연구가 활발히 수행되고 있으나, 여전히 제조현장에서는 기존 조업자의 노하우 또는 숙련도에 의존하고 있다. 이러한 공정 전문가의 의존성은 해당 인력 공백이 발생했을 때 현장 운용에 어려움을 가지고 있으며, 따라서 제조 기업들은 디지털 전환기술(AI, Bigdata)을 바탕으로 기존 문제점을 해결하고자 한다. 철강 분야의 형강 사상압연은 현장 전문가의 경험 기반 운전 방식으로 운영되고 있다. 따라서 본 연구에서는 열간 사상 압연에서 발생하는 장력을 제어하는 AI모델 개발에 활용하고자 데이터 분석을 통해 공정에 영향은 주는 인자를 도출하는 방식을 제안한다.
유연 플래퍼와 연계한 압전 밸브 모듈레이터의 동적 모델링 및 압력 제어
전준철(Jeon, Jun-Cheol),맹영준(Maeng, Young-Jun),손정우(Sohn, Jung Woo),최승복(Choi, Seung-Bok),이수진(Lee, Soo-Jin) 한국소음진동공학회 2010 한국소음진동공학회 논문집 Vol.20 No.10
This paper proposes a novel type of pressure control mechanism which can apply to vehicle ABS (anti-lock braking system) utilizing the piezoactuator based valve system associated with the pressure modulator. As a first step, a flapper-nozzle of a pneumatic valve system is devised by integrating the piezoacuator to the flexible beam structure. The dynamic modeling of the valve system is then undertaken and subsequently the governing equation of pressure control is derived considering the pressure modulator. A sliding mode controller is designed in order to achieve accurate pressure tracking control in the presence of actuator uncertainty as well as input pressure variation. It is shown through computer simulation that an accurate pressure tracking for sinusoidal motion whose magnitude is 40 bar is achieved by utilizing the proposed pressure control mechanism.