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;
compensate the pitch angle signal received on the input, determine that the compensated pitch angle signal is greater than a maximum threshold, and responsively output a signal representative of an excessive pitch excursion; 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 excessive pitch excursion.
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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.
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Citations
37 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;
compensate the pitch angle signal received on the input, determine that the compensated pitch angle signal is greater than a maximum threshold, and responsively output a signal representative of an excessive pitch excursion; 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 excessive pitch excursion. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A pitch angle alert generating circuit, comprising:
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a compensation function coupled to receive an indicated pitch angle signal and structured to generate and output a compensated pitch angle signal;
a comparator coupled to receive the indicated pitch angle signal and a maximum threshold pitch angle signal and functioning to output a signal as a function of a decreasing difference between the compensated pitch angle and the maximum threshold pitch angle; and
an advisory indication generator coupled to receive the decreasing difference signal output by the comparator and to generate an excessive pitch excursion advisory indication as a function of the decreasing difference signal. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. 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 maximum threshold pitch angle;
a means for compensating the indicated pitch angle signal;
a means operatively connected to receive the compensated pitch angle signal and the threshold pitch angle signal for comparing and determining a minimum difference between the compensated 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 compensated and threshold pitch angle signals approaching the minimum difference. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. 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 maximum threshold pitch angle;
compensating the indicated pitch angle signal;
comparing the compensated and maximum threshold pitch angle signals;
determining a difference between the compensated and maximum threshold pitch angle signals; and
generating an excessive pitch excursion advisory indication signal as a function of the difference between the compensated and maximum threshold pitch angle signals. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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30. 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 an indicated pitch attitude of the aircraft;
warning logic means operatively connected to the source of flight parameter signals for comparing the flight parameter signals and compensating the indicated pitch attitude, the warning logic means generating in response to predetermined relationships between selected flight parameter signals one of a warning signal and an advisory alert signal that is representative of the compensated pitch attitude exceeding a programmed alert threshold;
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. - View Dependent Claims (31, 32, 33)
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34. 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;
pitch angle compensating means operatively connected to the source of indicated pitch angle signals for generating a compensated pitch angle signal;
warning logic means operatively connected to the source of compensated pitch angle signals for generating a signal representing a difference between the compensated pitch angle signals and a maximum limit and responsively indicating that the compensated pitch attitude exceeds the maximum 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. - View Dependent Claims (35, 36, 37)
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Specification