Ground proximity warning system with time based mode switching
First Claim
1. A ground proximity warning system for aircraft comprising:
- a source of signals representing aircraft flight parameters;
a source of a signal representing time;
a first warning mode means responsive to said flight parameter signals for generating a first warning signal in accordance with a first predetermined relationship between flight parameters;
a second warning mode means responsive to said flight parameter signals for generating a second warning signal in accordance with a second predetermined relationship between flight parameters; and
means responsive to said time signal for switching from said first warning mode means to said second warning mode means as a function of time.
3 Assignments
0 Petitions
Accused Products
Abstract
To increase the effectivity of warnings and to decrease nuisance warnings in a ground proximity warning system having several modes of operation, the switching from one mode to another is done as a function of time. In addition, in a ground proximity warning system where a warning signal is generated in accordance with a predetermined relationship between flight parameters, one or more of these parameters can be varied as a function of time in order to, for example, increase the altitude above ground as a function of time from take-off that a terrain clearance warning may be generated or to decrease as a function of time, the radio altitude below which a negative take-off after a climb warning may be generated.
33 Citations
23 Claims
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1. A ground proximity warning system for aircraft comprising:
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a source of signals representing aircraft flight parameters; a source of a signal representing time; a first warning mode means responsive to said flight parameter signals for generating a first warning signal in accordance with a first predetermined relationship between flight parameters; a second warning mode means responsive to said flight parameter signals for generating a second warning signal in accordance with a second predetermined relationship between flight parameters; and means responsive to said time signal for switching from said first warning mode means to said second warning mode means as a function of time.
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2. A ground proximity warning system for aircraft comprising:
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a source of signals representing aircraft flight parameters; a source of a signal representing time; means responsive to said flight parameter signals for generating a warning signal in accordance with a predetermined relationship between parameters; and means responsive to said time signal and operatively connected to said warning signal generating means for varying as a function of time said predetermined relationship. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A ground proximity warning system for aircraft comprising:
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a source of signals representing aircraft configurations; a source of a signal representing radio altitude; a source of a signal representing barometric altitude; a source of a signal representing time; means responsive to said configuration signals and said radio altitude signals for generating a signal indicating the aircraft phase of flight; a first warning means responsive to said radio altitude signal, said barometric altitude signal, said time signal and said phase of flight signal for generating a first warning signal when the aircraft is in a take-off phase of flight and is descending with respect to barometric altitude below a first predetermined radio altitude and including means responsive to said time signal to decrease said first predetermined radio altitude as a function of time; and a second warning means responsive to said radio altitude signal and said time signal for generating a second warning signal when the aircraft descends below a second predetermined radio altitude including means responsive to said time signal for increasing said second predetermined radio altitude as a function of time. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification