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이종화(Jongwha Lee),곽철원(Chelwon Kwak),김유종(Yujong Kim),박병일(Byungil Park),이민성(Minsung Lee),이학준(Hakjoon Lee),박상원(Sangwon Park),조성식(Sungshik Cho),김민정(Minjung Kim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Generally, vehicle test has been widely adopted by means to evaluate and improve rattle noise of steering system. But it consumes a lot of time and development cost, as well as difficult to ignore the variation of vehicles. This paper proposes systematic approach method to evaluate rattle noise of power steering system instead of vehicle test and also identifies rattle noise phenomenon according to the size of steering system using acoustic holography method. On this study, noise contribution analysis using anti-rattle spring and yoke clearance drew appropriate design guide to reduce rattle noise. Test result using mode analysis of gearbox housing and tuning parameter of MDPS shows that improvement of mechanical system is important to reduce rattle noise. In the future, additional studies will be conducted to reduce rattle noise based on this research.