Method and device for monitoring a position indication of an aircraft
First Claim
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1. A method for monitoring a position indication of an aircraft, said position indication representing a current position of the aircraft, which is determined with the aid of information arising from an onboard positioning section, which cooperates with a satellite positioning system, and of inertial information generated by an onboard inertial system, the method comprising the following series of successive operations that are carried out in an automatic and repetitive manner:
- a) determining at least one first position error which represents an estimated maximum error of said position indication of the aircraft;
b) determining at least one second position error which represents an estimated maximum error of the position of the aircraft for a particular future duration, and which depends on a problem in determining said position indication;
c) summing said first and second position errors so as to obtain a global error;
d) comparing the global error with at least one threshold value which depends on flight constraints of the aircraft, which must fly inside a predetermined flight corridor; and
e) emitting an alarm signal if said global error is greater than said threshold value.
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Abstract
A device and method calculate a global error relating to a position indication of an aircraft and compare the global error with a threshold value, which depends on flight constraints.
15 Citations
12 Claims
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1. A method for monitoring a position indication of an aircraft, said position indication representing a current position of the aircraft, which is determined with the aid of information arising from an onboard positioning section, which cooperates with a satellite positioning system, and of inertial information generated by an onboard inertial system, the method comprising the following series of successive operations that are carried out in an automatic and repetitive manner:
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a) determining at least one first position error which represents an estimated maximum error of said position indication of the aircraft; b) determining at least one second position error which represents an estimated maximum error of the position of the aircraft for a particular future duration, and which depends on a problem in determining said position indication; c) summing said first and second position errors so as to obtain a global error; d) comparing the global error with at least one threshold value which depends on flight constraints of the aircraft, which must fly inside a predetermined flight corridor; and e) emitting an alarm signal if said global error is greater than said threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 12)
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10. A device for monitoring a position indication of an aircraft, said position indication representing a current position of the aircraft and being determined with the aid of information arising from an onboard positioning section, which cooperates with a satellite positioning system, and of inertial information generated by an onboard inertial system, the device comprising:
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a first position-error determining section that determines at least one first position error which represents an estimated maximum error of said position indication of the aircraft; a second position-error determining section that determines at least one second position error which represents an estimated maximum error of the position of the aircraft for a particular future duration, and which depends on a problem in determining said position indication; a summer that sums said first and second position errors so as to obtain a global error; a comparator that compares the global error with at least one threshold value which depends on flight constraints of the aircraft, which must fly inside a predetermined flight corridor; and an alarm section that emits an alarm signal if said global error is greater than said threshold value.
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11. A method for monitoring a position indication of an aircraft, said position indication representing a current position of the aircraft, which is determined with the aid of information arising from an onboard positioning section, which cooperates with a satellite positioning system, and of inertial information generated by an onboard inertial system, the method comprising the following series of successive operations that are carried out in an automatic and repetitive manner:
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a) determining at least one first position error which represents an estimated maximum error of said position indication of the aircraft; b) determining at least one second position error which represents an estimated maximum error of the position of the aircraft for a particular future duration, and which depends on a problem in determining said position indication; c) summing said first and second position errors so as to obtain a global error; d) comparing the global error with at least one threshold value which depends on flight constraints of the aircraft, which must fly inside a predetermined flight corridor; and e) emitting an alarm signal if said global error is greater than said threshold value, wherein; f) comparing the global error to a plurality of threshold values, and g) indicating, in the event that the alarm signal is emitted, the threshold values which are exceeded by said global error and those which are not.
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Specification