Title:
METHOD AND APPARATUS FOR ELIMINATING ANGULAR VELOCITY MEASUREMENT ERROR OF AUTOMOBILE GEAR RING
Document Type and Number:
WIPO Patent Application WO/2020/192688
Kind Code:
A1
Abstract:
A method for eliminating an angular velocity measurement error of an automobile ring gear, comprising the following steps: 1) assuming that a ring gear comprising N teeth is installed on a rotating shaft, reading signals of the ring gear, obtaining a time tk at which a tooth k passes, and assuming an error of a tooth i to be δi to obtain an angular velocity for eliminating the error; 2) a time interval between teeth being Δti(k)=tk‑tk‑
1, and one complete cycle time being Ti(k)=tk+N
/2–tk‑N
/2, then Δti/Ti=1/N+Δi(+ek), and the error of the tooth i being δi=2πΔi=2π(Δti/Ti1/N)+ek; and 3) using an adaptive filter to perform filter processing on the error of the tooth i; and 4) using the error of the tooth i to correct the angular velocity of gear teeth according to a correspondence relationship. The present invention also relates to an apparatus for eliminating an angular velocity measurement error of an automobile gear ring. Learning speed is adaptively updated according to the statistical characteristics of input signals to achieve a faster convergence speed, and effectively avoid overshoot, which provides more accurate data for subsequent tire pressure monitoring.
Inventors:
ZHONG YI (CN)
Application Number:
PCT/CN2020/081099
Publication Date:
October 01, 2020
Filing Date:
March 25, 2020
Export Citation:
Assignee:
UNIV WUHAN TECH (CN)
International Classes:
G01P3/00; G01P21/00; G06F17/15
Domestic Patent References:
| WO2018179340A1 | 2018-10-04 |
Foreign References:
| CN109991438A | 2019-07-09 | |||
| CN103147867A | 2013-06-12 | |||
| CN101236071A | 2008-08-06 | |||
| CN1477791A | 2004-02-25 | |||
| CN103698124A | 2014-04-02 | |||
| JP2014202173A | 2014-10-27 | |||
| JPH11159389A | 1999-06-15 |
Other References:
YU, SHIMEI ET AL.: "Design of Automobile ABS Speed Measurement Sensor Gear Ring Defect Detection Device", TRANSDUCER AND MICROSYSTEM TECHNOLOGIES, vol. 35, no. 05, DOI: 9620300
Attorney, Agent or Firm:
HUBEI WUHAN YONGJIA PATENT AGENCY CO., LTD. (CN)
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