A Study of Low-Frequency and High-Frequency Disc Brake Squeal

2016 ◽  
Vol 9 (3) ◽  
pp. 1235-1244 ◽  
Author(s):  
Seongjoo Lee ◽  
JeSung Jeon ◽  
ShinWook Kim ◽  
ShinWan Kim ◽  
Seong Rhee ◽  
...  
Keyword(s):  
High Frequency ◽  
Low Frequency ◽  
Disc Brake ◽  
Brake Squeal

Effect of pad shapes on high-frequency disc brake squeal

2016 ◽  
Vol 72 (4) ◽  
pp. 354
Author(s):  
Yongchang Du ◽  
Dihua Guan ◽  
Xiaofeng Wang
Keyword(s):  
High Frequency ◽  
Disc Brake ◽  
Brake Squeal

scholarly journals Mechanism Analysis of a Low-Frequency Disc Brake Squeal Based on an Energy Feed-In Method for a Dual Coupling Subsystem

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Yidong Wu
Keyword(s):  
Vibration Mode ◽  
Low Frequency ◽  
Element Model ◽  
Disc Brake ◽  
Mechanism Analysis ◽  
Brake Squeal ◽  
Complex Mode ◽  
Vehicle Noise ◽  
Complex Modal Analysis ◽  
The Difference

Brake squeal is a major component of vehicle noise. To explore the mechanism of the low-frequency brake squeal, a finite element model of an automobile disc brake was established, and a complex mode numerical simulation was performed. According to the unstable modes stemming from the complex modal analysis results, the low-frequency range brake squeal can be determined. Based on an energy feed-in method, the coupling subsystems of the piston-caliper and the disc-pad were established, and a calculation formula for the feed-in energy of the dual coupling subsystem was derived. The results showed that when the feed-in energy of the dual coupling subsystem is close to zero, the complex mode cannot be excited at the corresponding frequency. In addition, the difference in feed-in energy between the two coupling subsystems is positively correlated with the probability of the brake squeal, which can be used to determine the complex mode under which the brake squeal may occur. The greater the feed-in energy of a coupling subsystem is, the more likely it is that the maximum brake vibration mode will appear at this subsystem or its adjacent parts. The increase in brake oil pressure will eliminate some lower-frequency sounds but will not change the frequency of the original low-frequency brake squeals.

FE Analysis of Low-frequency Disc Brake Squeal (In Case of Floating Type Caliper)

1998 ◽  
Author(s):  
Toru Matsushima ◽  
Hiroyuki Masumo ◽  
Satoshi Ito ◽  
Massaki Nishiwaki
Keyword(s):  
Low Frequency ◽  
Fe Analysis ◽  
Disc Brake ◽  
Brake Squeal ◽  
Floating Type

The Influence of Differential Pad Wear on Low-Frequency and High-Frequency Brake Squeal

2019 ◽  
Author(s):  
Johannes Otto ◽  
Georg-Peter Ostermeyer ◽  
Seong K. Rhee
Keyword(s):  
High Frequency ◽  
Low Frequency ◽  
Brake Squeal ◽  
Pad Wear

Piezoelectric-based dither control for automobile brake squeal suppression under various braking conditions

2020 ◽  
pp. 107754632095676
Author(s):  
HweeKwon Jung ◽  
Gyuhae Park ◽  
Jeong Kyu Kim
Keyword(s):  
Automotive Industry ◽  
High Frequency ◽  
Experimental Investigations ◽  
Disc Brake ◽  
Nonlinear Friction ◽  
Frequency Range ◽  
Brake Squeal ◽  
Squeal Noise ◽  
Piezoelectric Stack Actuator ◽  
Friction Induced Vibration

Automobile brake squeal noise, which is nonlinear, friction-induced vibration in the frequency range 1–16 kHz, still remains a major problem for the automotive industry. This article presents analytical and experimental investigations into the application of dither control for active suppression of automobile disc brake squeal. Dither is a concept of active control that introduces high-frequency actuation into a system to suppress a much lower frequency disturbance. In this study, a specially designed brake system is built, in which a piezoelectric stack actuator in the piston of a floating caliper brake applies the dither input. In the experiments, squeal noise generated under the drag mode and various dynamic modes are considered. The results indicate that this piezoelectric-based dither control could effectively suppress the brake squeal noise by 5–10 dB and the squeal occurrence by up to 60% under various braking conditions.

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