Title: An efficient approach to estimate critical value of friction coefficient and sensitivity analysis for brake squeal
Authors: Jinchun Huang, Charles M. Krousgrill, Anil K. Bajaj
Addresses: ASM Assembly Automation Ltd., 3/F, Watson Center, 16 Kung Yip Street, Kwai Chung, N.T., Hong Kong, China. ' School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907-2088, USA. ' School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907-2088, USA
Abstract: Automotive brake noise has been a major concern in automotive industry and structural modification is a practical and effective way to reduce it. Here, a new method to estimate the critical friction coefficient is summarised, and then a sensitivity analysis is developed. The key is a reduced-order characteristic equation for computing the elastically coupled system|s eigenvalues and their derivatives. Based on this reduced-order equation, a sensitivity analysis of the steady-sliding stability with respect to lining stiffness and lining geometry is presented for a drum brake system. This analysis eliminates need for new system models or a full complex eigenvalue analysis.
Keywords: brake squeal; sensitivity analysis; critical friction coefficient; structural modification; lining geometry; mode coupling instability; eigenvalue veering; mode merging; reduced-order characteristic equations; vehicle braking; vehicle design.
International Journal of Vehicle Design, 2009 Vol.51 No.1/2, pp.21 - 38
Published online: 15 Jul 2009 *Full-text access for editors Access for subscribers Purchase this article Comment on this article