Disc Brake Squeal

Dr. Chen received his Ph.D. degree in mechanical systems engineering from Oakland University and graduated from Dalian University of Technology in China with M.S. and B.S. degrees in engineering mechanics. He is currently an SCT technical leader at Ford Motor Company and an adjunct professor at Wayne State University. He has diversified experience in noise/vibration/harshness (NVH), squeak and rattle (S&R), and optical metrology. He has developed the laser metrology-based methodologies in measuring disc brake rotor in-plane mode, brake pad damping, and in-plane/out-of-plane vibrations of operational deflection shape (ODS) during squeal, and in nondestructively inspecting brake pad insulator debonding. He has served as chairman for international symposia and three times (1998, 2000, and 2003) as a guest editor for the Journal of Optical Engineering on the special section, Optical Metrology: Development and Application in the Automotive/Transportation Industry. He is also presently an editorial board member of the Journal of Holography and Speckle. Dr. Chen’s work has been published in four books and has appeared in over forty-five technical articles in international and national journals and conferences. He holds nine patents.

Dr. Tan graduated from the University of California at Berkeley with B.S. and Ph.D. degrees in mechanical engineering and from the California Institute of Technology with a M.S. degree in aeronautics. Upon completing graduate studies, he joined the Mechanical Engineering Department of Wayne State University in 1989 and is currently a professor. His research and technical interests lie in the fields of structural dynamics, vibration, dynamic systems and control, mechatronics, and system identification. Dr. Tan is a Fellow of the American Society of Mechanical Engineers (ASME). He currently serves as an associate editor of the ASME Journal of Vibration and Acoustics, and on the editorial advisory board of Communications in Nonlinear Science and Numerical Simulations. Dr. Tan was also an associate dean of engineering at Wayne State from 2002 to 2003 and served as the chair of the ASME Design Engineering Division Technical Committee on Vibration and Sound from 2000 to 2002.

Ron L. Quaglia retired in 2005 as the manager of the Department of Body/Chassis NVH and Squeak & Rattle, Ford Vehicle Attribute System Engineering. He holds a masters degree in mechanical engineering from Cornell University and another in business administration from Michigan State University. His professional experience includes thirty years in mechanical systems, noise, vibration, harshness, and squeak and rattle activities. He was a manager since 1995 and has led numerous teams on NVH and S&R. While at Ford, he was the champion for high-mileage brake squeal reduction and S&R and NVH commodity robust design process activities. He also led the team to achieve best-in-class in brake squeal on two major vehicle lines. He has in-depth knowledge of general NVH and robust designs and has specialized in body structural and chassis interactions.