Ground proximity warning system with time and altitude 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 aircraft radio altitude;
means responsive to said radio altitude signal for generating a time based altitude signal that increases as a function of increasing radio altitude and time;
a first warning mode means responsive to said flight parameter signals and said radio altitude signal for generating a warning signal in accordance with a first predetermined relationship between flight parameters;
a second warning mode means responsive to said flight parameter signals and said radio altitude signal for generating said warning signal in accordance with a second predetermined relationship between flight parameters; and
means operatively connected to said first and said second warning mode means and responsive to said time based altitude signal for deactivating said first warning mode means.
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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 radio altitude and 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 radio altitude and time in order to, for example, increase the altitude above ground as a function of radio altitude and time from take-off that a terrain clearance warning is generated or to decrease as a function of radio altitude and time, the radio altitude below which a negative climb after take-off warning is generated.
32 Citations
32 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 aircraft radio altitude; means responsive to said radio altitude signal for generating a time based altitude signal that increases as a function of increasing radio altitude and time; a first warning mode means responsive to said flight parameter signals and said radio altitude signal for generating a warning signal in accordance with a first predetermined relationship between flight parameters; a second warning mode means responsive to said flight parameter signals and said radio altitude signal for generating said warning signal in accordance with a second predetermined relationship between flight parameters; and means operatively connected to said first and said second warning mode means and responsive to said time based altitude signal for deactivating said first warning mode means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. 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 aircraft radio altitude; means responsive to said radio altitude signal for generating a time based altitude signal that increases as a function of increasing radio altitude and time; means responsive to said flight parameter signals and said radio altitude signal for generating a warning signal in accordance with a predetermined relationship between said flight parameters and radio altitude; and means responsive to said time based altitude signal and operatively connected to said warning signal generating means for varying as a function of said time based altitude signal said predetermined relationship. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. 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; means responsive to said radio altitude signal for generating time based altitude signals that increases as a function of both time and radio altitude; means responsive to said configuration signals and said radio altitude signals for generating a signal indicating aircraft phase of flight; a first warning means responsive to said radio altitude signal, said barometric altitude signal, said time based altitude 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 based altitude signal to effectively decrease said first predetermined radio altitude as a function of said time based altitude signals; 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 based altitude signals for increasing said second predetermined radio altitude as a function of said time based radio altitude signal. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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Specification