Method And Device For Preventing An Anti-Collision System On Board An Airplane From Emitting Alarms, During An Altitude Capture Maneuver
First Claim
1. A method for preventing at least some alarms from being emitted by an anti-collision system (2) on board an airplane (AC) during an altitude change maneuver comprising an approach phase followed by a phase for capturing a set level (Zc), said anti-collision system (2) being able to detect at least one intrusive aircraft (AI) being located in the air environment of said airplane (AC), to calculate a theoretical collision time between said airplane (AC) and said intrusive aircraft (AI) and to emit first type alarms (TA) and second type alarms, when such a theoretical collision time is lower respectively than a first predetermined triggering threshold and a second predetermined triggering threshold,characterized in that, when said airplane (AC) is flying to said set level (Zc) with a vertical speed (Vz), the absolute value of which is at least equal to a first predetermined vertical speed threshold (Vz1), the following steps are carried out for preventing a second type alarm from being emitted:
- the emission of a first type alarm (TA) is first detected;
in the case where said first type detected alarm (TA) occurs when the height (h) separating said airplane (AC) from said set level (Zc) is at the most equal to a predefined height threshold (ho), the vertical speed (Vz) of said airplane (AC) is reduced so that the absolute value thereof is equal to said first vertical speed threshold (Vz1), so as to maintain the theoretical collision time associated with a second type alarm above the second triggering threshold; and
in the case where said first type detected alarm (TA) occurs when the height (h) separating said airplane (AC) from said set level (Zc) is strictly higher than said height threshold (ho);
i) as long as the height (h) separating said airplane (AC) from said set level (Zc) remains strictly higher than said height threshold (ho), the vertical speed (Vz) of said airplane (AC) is reduced so that the absolute value thereof is equal to a second predetermined vertical speed threshold (Vz2); and
ii) then, when the height (h) separating said airplane (AC) of said set level (Zc) is at the most equal to said height threshold (ho), the vertical speed (Vz) of said airplane (AC) is limited so that the absolute value thereof is equal to said first vertical speed threshold (Vz1), until said capture phase is initiated, so as to maintain the theoretical collision time associated with a second type alarm above the second triggering threshold.
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Abstract
According to the invention, the device (1) comprises means (3) for detecting, during an altitude capture maneuver, the emission of a first type alarm by the anti-collision system (2) and means (4) for controlling the vertical speed of said airplane (AC), after the emission of such an alarm, until the triggering of the capture phase.
22 Citations
9 Claims
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1. A method for preventing at least some alarms from being emitted by an anti-collision system (2) on board an airplane (AC) during an altitude change maneuver comprising an approach phase followed by a phase for capturing a set level (Zc), said anti-collision system (2) being able to detect at least one intrusive aircraft (AI) being located in the air environment of said airplane (AC), to calculate a theoretical collision time between said airplane (AC) and said intrusive aircraft (AI) and to emit first type alarms (TA) and second type alarms, when such a theoretical collision time is lower respectively than a first predetermined triggering threshold and a second predetermined triggering threshold,
characterized in that, when said airplane (AC) is flying to said set level (Zc) with a vertical speed (Vz), the absolute value of which is at least equal to a first predetermined vertical speed threshold (Vz1), the following steps are carried out for preventing a second type alarm from being emitted: -
the emission of a first type alarm (TA) is first detected; in the case where said first type detected alarm (TA) occurs when the height (h) separating said airplane (AC) from said set level (Zc) is at the most equal to a predefined height threshold (ho), the vertical speed (Vz) of said airplane (AC) is reduced so that the absolute value thereof is equal to said first vertical speed threshold (Vz1), so as to maintain the theoretical collision time associated with a second type alarm above the second triggering threshold; and in the case where said first type detected alarm (TA) occurs when the height (h) separating said airplane (AC) from said set level (Zc) is strictly higher than said height threshold (ho); i) as long as the height (h) separating said airplane (AC) from said set level (Zc) remains strictly higher than said height threshold (ho), the vertical speed (Vz) of said airplane (AC) is reduced so that the absolute value thereof is equal to a second predetermined vertical speed threshold (Vz2); and ii) then, when the height (h) separating said airplane (AC) of said set level (Zc) is at the most equal to said height threshold (ho), the vertical speed (Vz) of said airplane (AC) is limited so that the absolute value thereof is equal to said first vertical speed threshold (Vz1), until said capture phase is initiated, so as to maintain the theoretical collision time associated with a second type alarm above the second triggering threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for preventing at least some alarms from being emitted by an anti-collision system (2) on board an airplane (AC) during an altitude change maneuver comprising an approach phase followed by a phase for capturing a set level (Zc), said anti-collision system (2) being able to detect at least one intrusive aircraft (AI) being located in the air environment of said airplane (AC), to calculate a theoretical collision time between said airplane (AC) and said intrusive aircraft (AI) and to emit first type alarms (TA) and second type alarms, when such a theoretical collision time is lower respectively than a first predetermined triggering threshold and a second predetermined triggering threshold,
characterized in that said airplane (AC) flying to said set level (Zc) with a vertical speed (Vz), the absolute value of which is at least equal to a first predetermined threshold of vertical speed (Vz1), said device (1) comprises: -
means (3) for detecting the emission of a first type alarm (TA) by the anti-collision system (2); means (4) for controlling the vertical speed (Vz) of said airplane (AC) such as; in the case where said first type detected alarm (TA) occurs when the height (h) separating said airplane (AC) from said set level (Zc) is at the most equal to a predefined height threshold (ho), the vertical speed (Vz) of said airplane (AC) is reduced so that the absolute value thereof is equal to said first vertical speed threshold (Vz1), so as to maintain said theoretical collision time associated with a second type alarm above the second triggering threshold; and in the case where said first type detected alarm (TA) occurs when the height (h) separating said airplane (AC) from said set level (Zc) is strictly higher than said height threshold (ho); as long as the height (h) separating said airplane (AC) from said set level (Zc) remains strictly higher than said height threshold (ho), the controlling means (4) reduce the vertical speed (Vz) of said airplane (AC) so that the absolute value thereof is equal to a second predetermined vertical speed threshold (Vz2); and when the height (h) separating said airplane (AC) from said set level (Zc) is at the most equal to said height threshold (h), said controlling means (4) limit the vertical speed (Vz) of said airplane (AC) so that the absolute value thereof is equal to said first vertical speed threshold (Vz1), until said capture phase is initiated, so as to maintain said calculated collision time associated with a second type alarm above the second triggering threshold. - View Dependent Claims (9)
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Specification