Method and system for fault diagnosis of mechanical power system
A technology for mechanical power and system failures, applied in engine testing, machine/structural component testing, instruments, etc., can solve problems such as false alarms, missed detections, and indiscriminate working conditions, so as to increase the collection time and avoid air pollution. Effect of fault warning and improvement of fault isolation accuracy
Active Publication Date: 2022-03-04
AECC COMML AIRCRAFT ENGINE CO LTD
View PDF12 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the existing domestic and foreign setting methods for aircraft such as engine failure thresholds do not distinguish the influence of operating conditions, which easily lead to false alarms and missed detections.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings. In the following description, more details are set forth in order to fully understand the present invention, but the present invention can obviously be implemented in a variety of other ways different from this description, Those skilled in the art can make similar promotions and deductions based on actual application situations without violating the connotation of the present invention, so the content of this specific implementation manner should not limit the protection scope of the present invention.
[0028] For example, the description that the first feature described later in the description is formed on or above the second feature may include the embodiment in which the first and second features are formed through direct contact, and may also include an embodiment in which the first and second features are formed. Embodiments that form addition...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention provides a fault diagnosis method for a mechanical power system, comprising: working condition division and threshold setting steps, the step comprising: collecting working condition indications; dividing multiple available working conditions of the mechanical power system; condition record data; intercept the corresponding data, calculate the fault state indication of the available working conditions; separately calculate the threshold value of the fault state indication for each available working condition; and the step of fault or early fault diagnosis, which includes: collecting state indication parameters; Determine whether it is in an available working condition; if it is in an available working condition, calculate its actual fault state indication; compare the actual fault state indication with a threshold value for fault or early fault diagnosis of the mechanical power system. The invention also provides a mechanical power system fault diagnosis system, an aeroengine fault diagnosis method and an aeroengine fault diagnosis system. The present invention can carry out fault diagnosis according to working conditions, so as to prevent false alarm or missed detection.
Description
technical field [0001] The invention relates to a method and system for fault diagnosis of a mechanical power system, and also relates to a method and system for fault diagnosis of an aeroengine. Background technique [0002] The basic process of aircraft engine fault diagnosis usually includes the following steps: collecting original fault-related data; extracting fault feature indications from the original data; for each fault feature indication, using a threshold to determine whether a corresponding fault occurs. The thresholds in the above process can be determined using statistical methods based on existing flight data. However, the existing domestic and foreign setting methods for aircraft such as engine failure thresholds do not distinguish the influence of operating conditions, thus easily leading to false alarms and missed detections. [0003] For example, Chinese invention patent CN102768115A adopts time-domain and frequency-domain analysis (including envelope spe...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01M15/00
CPCG01M15/00
Inventor ćšćĺč
Owner AECC COMML AIRCRAFT ENGINE CO LTD