Pitch alerting angle for enhanced ground proximity warning system (EGPWS)
First Claim
1. A pitch angle alerting device, comprising:
- warning logic having an input that is structured to receive a signal representative of pitch angle, the warning logic being structured to determine a difference between a pitch angle signal received on the input and a predetermined threshold and to output a signal representative of the difference; and
an advisory indication generator coupled to accept the output of the warning logic, the advisory indication generator being structured to generate an advisory indication signal as a function of the difference.
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Accused Products
Abstract
A ground proximity warning system including a pitch angle alerting device, the pitch angle alerting device including warning logic having an input that is structured to receive a signal that is representative of the indicated pitch angle of the aircraft, the warning logic being structured to determine a difference between a pitch angle signal received on the input and a predetermined threshold, the warning logic being structured also to output a signal representative of the difference between the two signals; and an advisory indication generator coupled to accept the output of the warning logic, the advisory indication generator being structured to generate an advisory indication signal as a function of the difference between the two signals.
97 Citations
39 Claims
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1. A pitch angle alerting device, comprising:
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warning logic having an input that is structured to receive a signal representative of pitch angle, the warning logic being structured to determine a difference between a pitch angle signal received on the input and a predetermined threshold and to output a signal representative of the difference; and
an advisory indication generator coupled to accept the output of the warning logic, the advisory indication generator being structured to generate an advisory indication signal as a function of the difference. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A pitch angle alert generating circuit, comprising:
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a comparator structured to receive an indicated pitch angle signal and a threshold pitch angle signal and functioning to output a signal as a function of the difference; and
an advisory indication generator coupled to receive the difference signal output by the comparator and to generate an advisory indication as a function of the difference signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 38, 39)
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16. A pitch angle alerting device, comprising:
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a means for receiving a signal representing indicated pitch angle and a signal representing a predetermined threshold pitch angle;
a means operatively connected to receive the indicated pitch angle signal and the threshold pitch angle signal for comparing and determining a difference between the indicated and threshold pitch angle signals; and
a means operatively connected to the comparing and difference determining means for generating an advisory indication signal as a function of the difference between the indicated and threshold pitch angle signals.
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25. A method for generating a pitch angle alert, the method comprising:
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receiving a signal representing indicated pitch angle and a signal representing a predetermined threshold pitch angle;
comparing the indicated and threshold pitch angle signals;
determining a difference between the indicated and threshold pitch angle signals; and
generating an advisory indication signal as a function of the difference between the indicated and threshold pitch angle signals.
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34. A ground proximity warning system for aircraft, comprising:
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a source of signals representing a plurality of aircraft flight parameters, the flight parameter signals including a signal representing a pitch attitude of the aircraft;
warning logic means operatively connected to the source of flight parameter signals for comparing the flight parameter signals and in response to predetermined relationships between selected flight parameter signals generating one of a warning signal and an advisory alert signal;
a source of position signals representing the position of the aircraft; and
condition logic means operationally connected to the warning logic means and the source of position signals for varying the predetermined relationships when the aircraft is in a predetermined warning area.
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37. A ground proximity warning system for aircraft comprising:
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a source of radio altitude signals;
a source of barometric signals;
a source of glide slope deviation signals;
a source of indicated pitch angle signals;
a source of position signals representing the position of the aircraft;
warning logic means operatively connected to the source of indicated pitch angle signals for generating a signal representing a difference between the indicated pitch angle signals and a predetermined limit, the warning logic means further operatively connected to the sources of radio altitude signals, barometric altitude signals and glide slope deviation signals for generating a warning signal in response to predetermined relationships between the radio altitude signals, barometric altitude signals, glide slope deviation signals and the pitch angle difference signals; and
prioritization means operatively connected to the warning logic means for suppressing the warning signal generated in response to the pitch angle difference signals as a function of the predetermined relationships between the radio altitude signals, barometric altitude signals and glide slope deviation signals.
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Specification