Title:
LFT-BASED AEROENGINE SENSOR AND ACTUATOR FAULT DIAGNOSIS METHOD
Document Type and Number:
WIPO Patent Application WO/2020/118512
Kind Code:
A1
Abstract:
An LFT-based aeroengine sensor and actuator fault diagnosis method, the method comprising the following steps: establishing an aeroengine status variable model by combining a perturbation technique and a linear fitting technique, and establishing an affine parameter-dependent aeroengine LPV model on the basis of the model; converting the aeroengine LPV model having a perturbation signal and a sensor and actuator fault signal into an LFT structure, and acquiring an H∞ integrated framework of an LPV fault estimator; acquiring a solvable condition of existence for the fault estimator by solving a set of linear matrix inequalities (LMIs); and designing the fault estimator with reference to the LFT structure, thereby performing aeroengine sensor and actuator fault diagnosis. In the diagnosis method, a parameter of a fault estimator is adaptively adjusted according to a change in an aeroengine parameter, a sensor and actuator fault is quickly detected, and a fault signal is accurately reconfigured, thereby providing a basis for subsequent active fault tolerant control.
Inventors:
MA YANHUA (CN)
DU XIAN (CN)
WANG RUI (CN)
LIU MIN (CN)
SUN XIMING (CN)
DU XIAN (CN)
WANG RUI (CN)
LIU MIN (CN)
SUN XIMING (CN)
Application Number:
PCT/CN2018/120243
Publication Date:
June 18, 2020
Filing Date:
December 11, 2018
Export Citation:
Assignee:
UNIV DALIAN TECH (CN)
International Classes:
G05B23/02
Foreign References:
| CN103983453A | 2014-08-13 | |||
| CN106873568A | 2017-06-20 | |||
| CN104950876A | 2015-09-30 | |||
| CN107703742A | 2018-02-16 | |||
| CN107797543A | 2018-03-13 | |||
| US20110054863A1 | 2011-03-03 |
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