Brake cooling estimation methods and systems

Patent metadata

Field	Value
Publication number	US-9738264-B2
Application number	US-201514603052-A
Country	US
Kind code	B2
Filing date	Jan 22, 2015
Priority date	Jan 22, 2015
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

Systems and methods for estimating the cooling time of a brake assembly are disclosed. Systems are provided comprising a processor, a tangible, non-transitory memory configured to communicate with the processor, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the processor, cause the processor to perform operations comprising receiving, by the processor, a first temperature of a brake assembly at a first time, receiving, by the processor, a second temperature of a brake assembly at a second time, wherein the second time occurs a fixed period after the first time, determining, by the processor, a temperature decay coefficient (“α”) of the brake assembly based on the first temperature and the second temperature and calculating, by the processor, an estimated total time to cool the brake assembly to a predetermined temperature based on the first temperature, the predetermined temperature and α.

First claim

What is claimed is:

1. A system comprising:
a processor,
a tangible, non-transitory memory configured to communicate with the processor, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the processor, cause the processor to perform operations comprising:
receiving, by the processor, a first temperature of a brake assembly at a first time from a brake temperature monitoring system (BTMS);
receiving, by the processor, a second temperature of the brake assembly at a second time from the BTMS, wherein the second time occurs a fixed period after the first time;
determining, by the processor, a temperature decay coefficient (“α”) of the brake assembly based on the first temperature and the second temperature; and
calculating, by the processor, an estimated total time to cool the brake assembly to a predetermined temperature based on the first temperature, the predetermined temperature and α,
wherein α is greater than zero and satisfies an equation

α
⁡

[

t
n

]

=

ln
⁡

(

T
BTMS

⁡

(

t
n

)

-

T
ADJ

T
BTMS

⁡

(

t

n
-
1

)

-

T
ADJ

)

wherein T BTMS (t n ) is a temperature of the brake assembly at the second time (“t n ”), T BTMS (t n−1 ) is a temperature of the brake assembly at the first time (“t n−1 ”), and T ADJ is a tuning parameter.

2. The system according to claim 1 , wherein the calculating the estimated total time to cool the brake assembly to the predetermined temperature comprises an equation

t
Cool

⁡

[
n
]

=

1

α
⁡

[
n
]

·

ln
⁡

(

BRAKEHOT
-

T
ADJ

T
BTMS

⁡

(

t

n
-
1

)

-

T
ADJ

)

-

T
period

wherein t Cool [n] is the estimated total time to cool the brake assembly to the predetermined temperature (“BRAKEHOT”) at time interval n, and
T period is a length of a sampling period.

3. The system according to claim 2 , further comprising adjusting, by the processor, the estimated total time.

4. The system according to claim 3 , wherein the adjusting of the estimated total time comprises filtering the estimated total time to cool the brake assembly with a low-pass filter.

5. The system according to claim 4 , wherein the filtering the estimated total time to cool the brake assembly with the low-pass filter comprises an equation
t Cool _ Filt [i]=t Cool _ Filt [i −1]+β·( t Cool [i]−t Cool _ Filt [i −1])

wherein t Cool _ Filt [i] is the filtered estimated total time to cool the brake assembly to a predetermined temperature at time interval i, t Cool _ Filt [i− 1 ] is the filtered estimated total time to cool the brake assembly to a predetermined temperature at a time interval preceding the time interval i, βis a smoothing constant and t Cool [i] is the unfiltered estimated total time to cool the brake assembly to a predetermined temperature at time interval i.

6. The system according to claim 1 , further comprising an output device in at least one of electrical communication and radio frequency (“RF”) communication with the processor.

Assignees

• Goodrich Corp

Inventors

• Georgin Marc Jean Claude
• Rook Todd

Classifications

• F16D65/128

  characterised by means for cooling · CPC title

• F16D2065/783

  cooling control or adjustment · CPC title

• F16D65/78

  Features relating to cooling · CPC title

• B60T5/00

  Vehicle modifications to facilitate cooling of brakes · CPC title

• B60T17/22 Primary

  Devices for monitoring or checking brake systems; Signal devices · CPC title