Title:
FAULT-TOLERANT SOFT-HARD HYBRID CONTROL METHOD FOR FAULT DIAGNOSIS OF SENSOR OF AERO-ENGINE
Document Type and Number:
WIPO Patent Application WO/2024/050883
Kind Code:
A1
Abstract:
The present invention belongs to the field of aero-engine fault diagnosis. Provided is a fault-tolerant soft-hard hybrid control method for fault diagnosis of a sensor of an aero-engine. In the method, detection of a soft/hard fault of a sensor of an aero-engine and estimation of the true state of a system are realized by means of a Kalman filter group in a soft/hard fault diagnosis system. A designed soft-fault diagnosis system performs residual processing on measured values of sensors and estimated values of a group of Kalman filters, and solves the weighted sum of squares of same, so as to compare the weighted sum with a known threshold value to further detect whether there is a fault. A designed hard-fault diagnosis system compares the residual absolute value of the measured values of the sensors and the estimated value of a Kalman filter with the known threshold value, so as to further detect whether there is a fault. It is verified that by means of the method, the negative effect of a fault of a sensor of an aero-engine on the overall performance of a system can be effectively removed, such that the system is more stable, and various performance indexes can better meet requirements.
Inventors:
SUN XIMING (CN)
SUN TAO (CN)
YANG HANG (CN)
SUN TAO (CN)
YANG HANG (CN)
Application Number:
PCT/CN2022/121216
Publication Date:
March 14, 2024
Filing Date:
September 26, 2022
Export Citation:
Assignee:
UNIV DALIAN TECH (CN)
International Classes:
G05B23/02; G01D18/00
Foreign References:
| CN103440418A | 2013-12-11 | |||
| CN109857094A | 2019-06-07 | |||
| US9002678B1 | 2015-04-07 |
Other References:
HAN, BINGJIE ET AL.: "A Method of Multiple Fault Diagnosis Based on Fault Matching", AERONAUTICAL COMPUTING TECHNIQUE, vol. 45, no. 1, 31 January 2015 (2015-01-31), pages 96 - 99, 107, XP009553638, ISSN: 1671-654X
Attorney, Agent or Firm:
LIAONING HONGWEN INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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