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통합 스티어링 시스템 모델을 이용한 스티어링 성능 타깃 케스케이딩 프로세스 개발
김동호(Dongho Kim),최인권(Inkwon Choi) 한국자동차공학회 2016 한국자동차공학회 학술대회 및 전시회 Vol.2016 No.11
A driver uses a steering wheel, a gas pedal, and a brake pedal to control a vehicle. In order to make a turn, steering torque (or angle) is applied to a steering wheel. Steering torque (or angle) is transferred to a tire through a steering system and a front suspension system. Force and moment are generated at the contact patch between tire and ground. Inversely, the force and the moment are transferred back to a driver in the form of reactive force and moment. During a turn, a driver experiences (or feels) the response of a steering system and a vehicle to steering input simultaneously. Generally, steering performance is subjectively evaluated based on a driver’s steering feeling. Recently, almost every steering system is MDPS (Motor Driven Power Steering) system. MDPS system is controlled by MDPS control logic according to steering input and vehicle condition. Therefore, there are so many design (hardware) and control (software) parameters in a comprehensive steering system. In order to improve and optimize steering performance, it is needed to understand steering system fundamentally and to determine design and control parameters systematically. The purpose of this research is divided into three things. The first is to develop an integrated steering system model to predict steering performance. The second is to analyze and quantify the influence of design and control parameters. The last thing is to develop a systematic target cascading process to achieve target steering performance.