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Method of sensor data fusion

A sensor and parameter technology, applied in the directions of instruments, navigation, transportation and packaging, etc., can solve problems such as abnormal sensor performance and unreliable determination of false alarms

Active Publication Date: 2015-08-19
AIRBUS OPERATIONS (SAS)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] A disadvantage of such a method of combining measurements is that the method does not reliably determine the probability of a false alarm, i.e. the probability that a sensor is considered to be behaving abnormally even though it does not exhibit any such anomalies

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Embodiment Construction

[0096] Estimation of parameters by means of multiple measurements of parameters obtained by different sensors will be described below.

[0097] The invention applies more particularly to the estimation of flight parameters of the aircraft, such as the speed of the aircraft, the attitude of the aircraft, the acceleration of the aircraft, the angular rotational speed of the aircraft, the trajectory angle of the aircraft, the azimuth of the aircraft or even the location etc. It can also be applied to the estimation of temperature or pressure inside or near the aircraft. However, the invention is not limited to such applications, but can be applied in many technical fields where measurement results from multiple sensors have to be combined.

[0098] "Sensor" should be understood here to mean a physical sensor capable of directly measuring the parameter of interest, but also to mean that it may include one or more physical sensors and signal processing means so that based on the m...

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Abstract

A method for merging measurements of a flight parameter of an aircraft, from measurements (y1, y2, y3, y4) of this parameter supplied respectively by a plurality of sensors (C1, C2, C3, C4), comprising: for each sensor (C1; C2; C3; C4), computing a deviation (T1; T2; T3; T4), proportional to the absolute value of a difference between a measurement (y1, y2, y3; y4) supplied by this sensor, and an estimation of the parameter computed from the measurements supplied by the other sensors; comparing each deviation to a corresponding threshold (Td1; Td2; Td3; Td4); based on the comparisons, determining the presence or not of an anomaly on one of the sensors with a determined total probability of false alarm; and merging measurements to provide a final estimation of the parameter ({circumflex over (x)}).

Description

technical field [0001] The invention relates to the field of merging measurements from sensors and more particularly to estimating flight parameters of an aircraft. Background technique [0002] The aircraft is equipped with a large number of sensors, making it possible to measure the flight parameters of the aircraft (speed, attitude, position, altitude, etc.) and more generally to measure the state of the aircraft at each moment. [0003] These flight parameters are then used by the avionics system, in particular by the autopilot system, the flight computer (flight control computer system), the aircraft control and guidance system (flight guidance system), the most critical systems of the aircraft. [0004] Due to the importance of these systems, the sensors are redundant, ie, multiple sensors provide measurements of the same parameter. These different measurements are then processed by a measurement merging method to provide the best possible estimate of the parameter. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C23/00
CPCG01S19/45G01D3/08G01C21/165G01C23/00B64D43/02
Inventor 阿兰·吉列特艾哈迈德·塔哈·扎里贾比里
Owner AIRBUS OPERATIONS (SAS)