METHOD AND DEVICE FOR DISPLAYING SPEED INFORMATION ON AN AIRCRAFT
First Claim
Patent Images
1. A method of displaying speed information on an airplane, according to which method, in an automatic manner, in real time:
- a current air speed of the airplane is received;
a current acceleration value is calculated with the aid of said current air speed; and
at least one speed trend symbol which is representative of an acceleration value received and which indicates the speed of the airplane at the end of a predetermined duration, is displayed on a speed scale represented on a viewing screen,wherein, moreover, in an automatic manner and in real time;
a monitoring is carried out so as to be able to identify each of the following situations;
the airplane is controlled so as to fly according to a constant speed and the airplane is controlled so as to fly according to a constant Mach number;
a corrected value of the acceleration value is calculated, which is such that the corresponding speed trend symbol becomes zero when the Mach number of the airplane does not vary; and
the following are transmitted to said viewing screen for display thereof in the form of a speed trend symbol;
said current acceleration value, when the airplane is controlled so as to fly according to a constant speed; and
said corrected value, when the airplane is controlled so as to fly according to a constant Mach number.
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Abstract
The display device (1) comprises means (3) for correcting an acceleration value used for displaying on a screen (7) a speed trend of the airplane, making it possible to zero a speed trend symbol (11) when the Mach number of the airplane does not vary.
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Citations
10 Claims
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1. A method of displaying speed information on an airplane, according to which method, in an automatic manner, in real time:
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a current air speed of the airplane is received; a current acceleration value is calculated with the aid of said current air speed; and at least one speed trend symbol which is representative of an acceleration value received and which indicates the speed of the airplane at the end of a predetermined duration, is displayed on a speed scale represented on a viewing screen, wherein, moreover, in an automatic manner and in real time; a monitoring is carried out so as to be able to identify each of the following situations;
the airplane is controlled so as to fly according to a constant speed and the airplane is controlled so as to fly according to a constant Mach number;a corrected value of the acceleration value is calculated, which is such that the corresponding speed trend symbol becomes zero when the Mach number of the airplane does not vary; and the following are transmitted to said viewing screen for display thereof in the form of a speed trend symbol; said current acceleration value, when the airplane is controlled so as to fly according to a constant speed; and said corrected value, when the airplane is controlled so as to fly according to a constant Mach number. - View Dependent Claims (2, 3, 4)
wherein, to calculate said corrected value: -
a corrective value is calculated which is proportional to the vertical speed of the airplane and which is dependent on the altitude and on the Mach number of the airplane; and this corrective value is added to said current acceleration value to obtain said corrected value.
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3. The method as claimed in claim 1,
wherein, to implement said monitoring, at least the selection, which is carried out by a pilot on a control panel relating to an automatic piloting system, between a control for a flight according to a constant speed and a control for a flight according to a constant Mach number, is monitored. -
4. The method as claimed in claim 1,
wherein, to implement said monitoring, at least one information item, which is transmitted automatically by a flight management system, is monitored so as to control a flight according to a constant speed or a flight according to a constant Mach number.
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5. A device for displaying attitude information on an airplane, said device comprising:
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means for receiving a current air speed; means for calculating a current acceleration value with the aid of said current air speed; and a viewing screen which displays, in real time, on a speed scale, at least one speed trend symbol which is representative of an acceleration value received and which indicates the speed of the airplane at the end of a predetermined duration, which comprises, moreover; monitoring means making it possible to identify each of the following situations;
the airplane is controlled so as to fly according to a constant speed and the airplane is controlled so as to fly according to a constant Mach number;calculation means for calculating a corrected value of the acceleration value, which is such that the corresponding speed trend symbol becomes zero when the Mach number of the airplane does not vary; and means for transmitting to said viewing screen for display thereof in the form of a speed trend symbol; said current acceleration value, when the airplane is controlled so as to fly according to a constant speed; and said corrected value, when the airplane is controlled so as to fly according to a constant Mach number. - View Dependent Claims (6, 7, 8, 9, 10)
wherein said calculation means comprise: -
means for calculating a corrective value which is proportional to the vertical speed of the airplane and which is dependent on the altitude and on the Mach number of the airplane; and means for adding this corrective value to said current acceleration value to obtain said corrected value.
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7. The device as claimed in claim 5,
wherein said monitoring means comprise means for monitoring at least the selection which is carried out by a pilot on a control panel relating to an automatic piloting system, between a control for a flight according to a constant speed and a control for a flight according to a constant Mach number. -
8. The device as claimed in claim 5,
wherein said monitoring means comprise means for monitoring at least one information item, which is transmitted automatically by a flight management system, so as to control a flight according to a constant speed or a flight according to a constant Mach number. -
9. The device as claimed in claim 5,
which comprises, moreover, means for providing the data used in the calculations implemented by said device. -
10. An airplane,
which comprises a device for displaying speed information such as that specified under claim 5.
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Specification