TY - GEN
T1 - Suppression of multiple order friction torque fluctuations with modulated actuation pressure
AU - Sen, Osman Taha
AU - Dreyer, Jason T.
AU - Singh, Rajendra
PY - 2014
Y1 - 2014
N2 - The goal of this article is to examine the effect of modulated actuation pressure on the friction torque response of a disc brake system. First, a dynamic friction experiment, consisting of a flywheel, shaft and brake assembly, is built and instrumented accordingly. The actuation pressure is modulated with a solenoid valve located in the hydraulic line. During the experiment, the modulation frequency is kept intact, and the shaft torque is measured as the system slows down; an amplification of the dynamic torque is observed as the system passes through the resonance. Second, a nonlinear mathematical model of the brake experiment is developed, and the dynamic torque response is numerically calculated for various modulation schemes, such as with constant frequency and sweeping modulation frequency with single harmonic content. Predicted results are compared with measurements. Finally, the outcome of this study is related to the brake judder problem, and some solutions for the reduction of dynamic torque are briefly discussed.
AB - The goal of this article is to examine the effect of modulated actuation pressure on the friction torque response of a disc brake system. First, a dynamic friction experiment, consisting of a flywheel, shaft and brake assembly, is built and instrumented accordingly. The actuation pressure is modulated with a solenoid valve located in the hydraulic line. During the experiment, the modulation frequency is kept intact, and the shaft torque is measured as the system slows down; an amplification of the dynamic torque is observed as the system passes through the resonance. Second, a nonlinear mathematical model of the brake experiment is developed, and the dynamic torque response is numerically calculated for various modulation schemes, such as with constant frequency and sweeping modulation frequency with single harmonic content. Predicted results are compared with measurements. Finally, the outcome of this study is related to the brake judder problem, and some solutions for the reduction of dynamic torque are briefly discussed.
KW - Brake judder
KW - Experimental dynamics
KW - Friction-induced vibration
KW - Modulated actuation pressure
KW - Transient vibration
UR - http://www.scopus.com/inward/record.url?scp=84907347012&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-04522-1_21
DO - 10.1007/978-3-319-04522-1_21
M3 - Conference contribution
AN - SCOPUS:84907347012
SN - 9783319045214
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 223
EP - 230
BT - Nonlinear Dynamics - Proceedings of the 32nd IMAC, A Conference and Exposition on Structural Dynamics, 2014
PB - Springer New York LLC
T2 - 32nd IMAC Conference and Exposition on Structural Dynamics, 2014
Y2 - 3 February 2014 through 6 February 2014
ER -