Title:
SYSTEM FOR DETECTING AND DIAGNOSING DEFECTIVE STATE OF AIRPLANE ENGINE AND METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2011/159088
Kind Code:
A2
Abstract:
The present invention relates to a system for detecting and diagnosing a defective state of an airplane engine and a method thereof, comprising: at least one vibration sensor attached to an airplane; a reference model database construction unit which generates a sine wave type virtual input data having a period corresponding to a rotor speed of an airplane engine using normal vibration data of the vibration sensor and the rotor speed of the airplane engine, obtains a parameter of a reference model on the basis of an input/output data set obtained through an extraction of output data from vibration data of a proper uniform velocity period corresponding to a period of the virtual input data, and constructs a reference model database by obtaining a covariance of a parameter estimation error reflecting an upper limit of uncertainty of the model using statistical properties such as the input/output data, the input/output data obtained from another section of the normal vibration data, a noise variation of the vibration sensor, and the like; and a defect detection and diagnosis unit which estimates a parameter of a model using suspicious data from the vibration sensor, obtains a test variable and a numerator coefficient value difference of a transfer function between the models using a parameter of the estimated suspicious model, the parameter of the reference model, and the covariance of the parameter estimation error, and diagnoses the defective state and the defective cause of the airplane engine. Accordingly, the present invention can determine the defective state and the detective cause of the airplane engine using the vibration data of the airplane engine.
Inventors:
KWON OH-KYU (KR)
YANG JI-HYUK (KR)
LEE SANG YONG (KR)
YANG JI-HYUK (KR)
LEE SANG YONG (KR)
Application Number:
PCT/KR2011/004349
Publication Date:
December 22, 2011
Filing Date:
June 14, 2011
Export Citation:
Assignee:
INHA IND PARTNERSHIP INST (KR)
KWON OH-KYU (KR)
YANG JI-HYUK (KR)
LEE SANG YONG (KR)
KWON OH-KYU (KR)
YANG JI-HYUK (KR)
LEE SANG YONG (KR)
International Classes:
G01H17/00; G01M15/00
Foreign References:
| KR100582584B1 | 2006-05-23 | |||
| KR100722832B1 | 2007-05-22 | |||
| KR870010298A |
Other References:
None
Attorney, Agent or Firm:
LEE, Won Hee (642-16 Yoksam-dong Kangnam-ku, Seoul 135-080, KR)
Download PDF:
Claims: