고성능 및 친환경 차량의 복합재 브레이크 안정감 향상을 위한 스퀼 노이즈 강건성 분석에 관한 연구 = A Study on Squeal Noise Robustness Analysis to Improve Composite Brake Stability of High Performance and Eco-Friendly Vehicles

다국어 초록 (Multilingual Abstract)

Composite material is very attractive because it has excellent mechanical property and is possible to lightweight due to the low density. However, composite material is less used compared to other systems in the chassis system because it is very hard to solve NVH problem when composite material is applied to vehicle. Especially, reducing squeal noise of composite brake system is essential to apply it to vehicle successfully. In this paper, we present a new solution to reduce squeal noise of composite brake system. To achieve this goal, we analyze main causes of noise using RCA (Root Cause Analysis), CA (Contradiction Analysis) and sequentially get IFR (Ideal Final Result) to solve the problem. Next, we define the function of composite brake system and derive control factors and noise factors. A variety of tests for factors like chamfer, slot, damping shim, underlayer of brake pad are done. In addition, we analyze level of contribution for control factors theoretically. Finally, we get the effective solution for reducing squeal noise.

참고문헌 (Reference)

• 1 심재훈, "카본 세라믹 복합재 디스크의 벤트 구조 최적화를 통한 냉각성능 향상에 관한 연구" 사단법인 한국자동차안전학회 11 (11): 23-29, 2019
• 2 심재훈, "복합재 브레이크의 실차 유효성 검증에 관한 연구" 한국자동차공학회 27 (27): 259-266, 2019
• 3 박진택, "디스크 브레이크의 편마모 저감을 위한 브레이크 패드의 백플레이트 형상 강건설계" 한국자동차공학회 22 (22): 8-19, 2014
• 4 박진택, "디스크 브레이크의 편마모 저감을 위한 브레이크 패드의 마찰재 형상 강건설계" 한국자동차공학회 20 (20): 77-87, 2012
• 5 심재훈, "고급차의 제동 신뢰성 향상을 위한 카본 세라믹 복합재의제동 특성 제어 및 향후 기술 진화 트랜드 예측에 관한 연구" 한국자동차공학회 24 (24): 684-693, 2016
• 6 J. H. Shim, "A Study on Squeal Noise Reduction to Improve Braking Stability of Composite Brake Vehicles" KASA 144-114, 2020
• 7 J. H. Shim, "A Study on Improvement of Fade Characteristic of Composite Brake through Optimization of Flow Performance" KASA 143-148, 2018
• 8 J. H. Shim, "A Study on Development of Ideal Final Result to Reduce NVH Deterioration Characteristics of Composite Brake System" KSAE 348-353, 2019
• 9 J. H. Shim, "A Study on Development of Brake System and Performance Improvement using Carbon Ceramic Composite" KSAE 318-325, 2018
• 10 J. H. Shim, "A Study on Coupling Structure of Carbon Ceramic Composite using Substance-Field Model Analysis and Friction･Wear Characteristics Control" KSAE 380-388, 2016
• 11 J. H. Shim, "A Study on Analysis of Differentiation Technology and Development for Brake System of Luxury Cars" KASA 32-37, 2019