Method for monitoring the integrity of an aircraft position computed on board
First Claim
1. A method for monitoring the integrity of an aircraft position channel on board said aircraft comprising:
- using a plurality of redundant primary channels, each redundant primary channel computing, during a primary computing cycle, a primary position (PosCri) of the aircraft;
establishing, within the electronic control devices on-board in the aircraft, pairs of computing channels by associating, with each primary computing channel, a dissimilar computing channel, each dissimilar computing channel computing, during a dissimilar computing cycle, a dissimilar position (PosDis) of the aircraft;
computing, for each computing channel pair established, a distance (E1;
E2;
E3) between the primary position and the dissimilar position respectively computed by the primary computing channel and the dissimilar computing channel of the computing channel pair considered;
comparing each distance computed to an alarm threshold;
sending alarm information when at least one computed distance is greater than the alarm threshold.
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Abstract
A method for monitoring the integrity of an aircraft position computed on board including on-board means for monitoring the aircraft position that are able to detect common-mode failures. Dissimilar computing channels of the aircraft position are utilized, the dissimilar channels being on-board in the aircraft. Each aircraft position primary computing channel is supplemented by a dissimilar computing channel, which allows the coherence of the primary aircraft position, the position computed by the primary computing channels, to be verified. Mechanisms for verifying the reliability of the results from dissimilar computing channels are implemented to limit a loss of performance from the utilization of dissimilar computing channels, which are less performing than primary computing channels.
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Citations
16 Claims
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1. A method for monitoring the integrity of an aircraft position channel on board said aircraft comprising:
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using a plurality of redundant primary channels, each redundant primary channel computing, during a primary computing cycle, a primary position (PosCri) of the aircraft; establishing, within the electronic control devices on-board in the aircraft, pairs of computing channels by associating, with each primary computing channel, a dissimilar computing channel, each dissimilar computing channel computing, during a dissimilar computing cycle, a dissimilar position (PosDis) of the aircraft; computing, for each computing channel pair established, a distance (E1;
E2;
E3) between the primary position and the dissimilar position respectively computed by the primary computing channel and the dissimilar computing channel of the computing channel pair considered;comparing each distance computed to an alarm threshold; sending alarm information when at least one computed distance is greater than the alarm threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A device for computing a position of an aircraft integrated with said aircraft, comprising:
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a multiplicity of redundant primary computing channels, able to compute, during a primary computing cycle, a primary aircraft position (PosCri); a multiplicity of dissimilar computing channels associated with each primary computing channel in such a way as to form pairs of computing channels, each dissimilar computing channel being able to compute, during a dissimilar computing cycle, a dissimilar position (PosDis) of the aircraft; a computer configured to compute, for each computing channel pair established, a distance (E1;
E2;
E3) between the primary position and the dissimilar position respectively computed by the primary computing channel and the dissimilar computing channel of the computing channel pair considered;wherein the computer is further configured to compare each distance computed to an alarm threshold; and the computer is still further configured to send alarm information when at least one computed distance is greater than the alarm threshold. - View Dependent Claims (15, 16)
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Specification