A Study of the Relationship between Leading offset and Squeal Noise

Park, Joo Sang; Han, Min Gyu; Oh, Seon Yeol

doi:10.4271/2016-01-1919

Cited by 2 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, Fieldhouse et al 8 used a 12-piston opposed caliper to study influence of the CoP position on the squeal performance and found that certain zones for the CoP can be identified that lead to a quieter brake. Park et al 9 designed a four-piston opposed laboratory caliper, which is capable of independent pressure setting in each piston, to study the influence of the leading and trailing CoP offset on squeal occurrence. They observed that the squeal was readily generated with a higher pressure value at the leading pistons resulting in a leading CoP offset.…”

Section: Introductionmentioning

confidence: 99%

A new prototype system for automated suppression of disc brake squeal

Budinsky

Brooks

Barton

2020

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

This paper presents a new prototype system capable of automated disc brake squeal suppression using a method of varying the leading and trailing piston pressures in a multi-piston opposed brake caliper. The new system consists of a novel modular four-piston brake caliper, a two-channel brake actuation system and an advanced control system that is capable of varying the leading/trailing pressure ratio (LTPR) when squeal is detected. The amended LTPR results in movement of the centre of pressure (CoP) position at the pad/disc interface, which leads to new dynamic parameters of the brake system and thereby to different squeal propensity. Moreover, the control system maintains the overall brake torque at a constant value, so the variation of the LTPR on the brake performance is minimised. Experiments using the current disc brake setup showed that by varying the LTPR, thereby changing the CoP position, the squeal occurrence can be successfully controlled. Large leading or trailing offsets typically lead to a quieter brake. Tests demonstrating operation of the proposed squeal control system in an automatic mode reduced the squeal occurrence significantly for a given duty cycle.

show abstract

Section: Introductionmentioning

confidence: 99%

A new prototype system for automated suppression of disc brake squeal

Budinsky

Brooks

Barton

2020

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

“…In recent experimental work, it has been observed that the position of the centre of pressure (CoP) at the brake pad/disc contact area has an influence on the onset of brake squeal [3]. Also, subsequent experimental studies [4], [5] showed a certain correlation between the squeal occurrence and the position of the CoP. Therefore, an increased interest exists in studying the contact pressure distribution along with the CoP position at the pad/disc interface and their impact on vibrational behavior of the brake system.…”

Section: Introductionmentioning

confidence: 99%

A New Analytical Model of the Brake Pad for Improved Calculation of the Centre of Pressure and Friction Coefficient in A Multi-Piston Disc Brake

Budinsky¹,

Brooks²,

Barton³

2018

IJET

View full text Add to dashboard Cite

In recent experimental work it has been observed that the position of the centre of pressure (CoP) at the brake pad/disc interface has an influence on the onset of brake squeal. To determine the CoP during a braking event, a simple two-dimensional analytical model of the brake pad or more complex numerical finite element model of a disc brake are commonly used. This paper presents a new three-dimensional analytical model of a brake pad that determines the CoP position in both circumferential and radial directions. Due to higher complexity, this model provides more realistic clamp and friction force values, which can be used together with the more accurate radial position of the CoP for evaluation of the brake torque. The CoP position calculated using the new model was compared with the CoP evaluated by a finite-element model of an equivalent 8-piston opposed disc brake. The CoP results across the whole pad/disc interface showed a close correlation between these two approaches, giving the new analytical model a potential use in applications where an instantaneous value of the CoP with good accuracy is required. Finally, the new model was used to demonstrate possible improvement of the traditional method of the friction coefficient calculation. Due to greater accuracy the new model gives an approximately 8% larger value of the friction coefficient than the traditional approach.

show abstract

A Study of the Relationship between Leading offset and Squeal Noise

Cited by 2 publications

References 5 publications

A new prototype system for automated suppression of disc brake squeal

A new prototype system for automated suppression of disc brake squeal

A New Analytical Model of the Brake Pad for Improved Calculation of the Centre of Pressure and Friction Coefficient in A Multi-Piston Disc Brake

Contact Info

Product

Resources

About