Active fault tolerant design method of FADS (flush air data sensing) system

An atmospheric data and sensing system technology, applied in electrical digital data processing, computer-aided design, design optimization/simulation, etc., can solve the problems of small number of fault points, prone to misjudgment, low target diagnosis efficiency, etc., and achieve accurate diagnosis. , high reliability and high efficiency

Inactive Publication Date: 2016-05-11
CHINA ACAD OF AEROSPACE AERODYNAMICS
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Problems solved by technology

[0003] The current active fault-tolerant FADS algorithm mainly uses redundant comparison judgments of multiple sets of solution results, which is inefficient in target diagnosis, prone to misjudgment, and the number of fault points for diagnosis is small, and only when the pressure at the pressure point deviates greatly from the normal value can it be diagnosed break down

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  • Active fault tolerant design method of FADS (flush air data sensing) system
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  • Active fault tolerant design method of FADS (flush air data sensing) system

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Embodiment 1

[0039] This embodiment takes the layout of 9 pressure measuring points as an example (i.e. M=2) to describe the specific implementation process of the present invention in detail: (1) 9 pressure measuring points are installed on the aircraft head, and the layout of 9 pressure measuring points is as follows: figure 1 As shown, take the vertex of the aircraft head shell as the origin of the three-dimensional coordinates, the aircraft is an axisymmetric body, the symmetry axis is the Y axis, its axisymmetric plane is the XY coordinate plane, and the direction perpendicular to the Y axis along the aircraft centerline is the positive direction of the X axis. The Z axis is perpendicular to the XY coordinate plane, and satisfies the right-hand spiral law. A pressure measuring point p is arranged at the vertex of the aircraft head shell 1 , 4 pressure measuring points (p 2 ,p 3 ,p 4 ,p 5 ), these four pressure measuring points are located in the directions of 0°, 90°, 180°, and 27...

Embodiment 2

[0054] This embodiment provides a pressure measuring point array (i.e. M=3) of 13 pressure measuring point layouts, 13 pressure measuring points are installed on the aircraft head, and the layout of 13 pressure measuring points is as follows: figure 2As shown, the definition of the three-dimensional coordinates is consistent with that of Embodiment 1, and a pressure measurement point p is arranged at the vertex of the aircraft head shell 1 , 6 pressure measuring points (p 2 ,p 3 ,p 4 ,p 5 ,p 6 ,p 7 ), the six pressure measuring points are installed asymmetrically along the Z axis, p 3 Installed in 90° direction, p 2 ,p 7 ,p 6 ,p 5 ,p 4 Installed in the directions of 0°, -45°, -90°, -135°, -180°, 6 pressure measuring points (p 8 ,p 9 ,p 10 ,p 11 ,p 12 ,p 13 ), the installation method of each pressure measurement point is the same as that of the second section, and each pressure measurement point of the third section is in a straight line with the pressure measu...

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Abstract

The invention relates to an active fault tolerant design method of an FADS (flush air data sensing) system and belongs to the technical field of FADS. According to the active fault tolerant design method, a hierarchical diagnosis strategy is adopted, a pressure sensing point array is mounted on an aircraft to measure pressure at pressure sensing points, then whether faults occur to a meridian is judged according to a similarity relation matrix, a pressure filed fault diagnosis model is used for diagnosing a specific faulted point on the meridian, and whether a reference model or a reconstruction model is called for atmospheric parameter calculation is determined according to the fault condition. The method is accurate in diagnosis, high in efficiency, high in fault tolerant capacity and high in reliability.

Description

technical field [0001] The invention relates to the design of an embedded atmospheric data sensing algorithm, in particular to an active fault-tolerant design method for an embedded atmospheric data sensing system, and belongs to the technical field of embedded atmospheric data sensing. Background technique [0002] The embedded air data sensing (FlushAirDataSensing, FADS) system relies on the pressure sensor array to measure the pressure distribution on the surface of the aircraft, and indirectly obtains flight atmospheric data such as static pressure, Mach number, angle of attack, and sideslip angle through specific algorithms. The FADS system is the main way for supersonic vehicles to obtain flight atmospheric data as flight control input, especially for air-breathing supersonic vehicles. However, the pressure measurement hole of the pressure measurement point is very small (usually 1mm ~ 2mm), so it is prone to failure, such as blockage, sensor failure, etc. The main pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F2117/02
Inventor 陈广强周伟江杨云军
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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