초록 ▼

A ground proximity warning system is disclosed which can recognize when an aircraft is on a final approach to an airport without utilizing a landing flap signal input. Airports together with the surrounding terrain topography are modeled by a simple geometric shape, such as, an inverted truncated co

A ground proximity warning system is disclosed which can recognize when an aircraft is on a final approach to an airport without utilizing a landing flap signal input. Airports together with the surrounding terrain topography are modeled by a simple geometric shape, such as, an inverted truncated cone, and stored on-board the aircraft. The system uses navigational data to determine the distance of the aircraft from the geometric model. Once the aircraft is determined to be within the area defined by the geometric model, the system provides an enabling envelope indicative that the aircraft is on a final approach for enabling various ground proximity warning systems. Also disclosed is a system for altering the enabling envelope as a function of the aircraft\s alignment with a particular runway.

대표청구항 ▼

A system for use in an aircraft for providing an enabling envelope for a ground proximity warning system for an aircraft comprising: a first source of signals representative of the longitude and latitude of an airport; a second source of signals representative of the current longitude and latitude o

A system for use in an aircraft for providing an enabling envelope for a ground proximity warning system for an aircraft comprising: a first source of signals representative of the longitude and latitude of an airport; a second source of signals representative of the current longitude and latitude of said aircraft; means responsive to said first source of signals representative of the longitude and latitude of said airport and said second source of signals representative of the current longitude and latitude of said aircraft for computing the distance of said aircraft from said airport and providing an enabling envelope for enabling the warning system as a function of said distance of the aircraft with respect to said airport; a source of signals representative of the relative angular position of a particular runway with respect to the heading of the aircraft; and means responsive to said first and second sources of signals for providing a signal representative of the alignment of the aircraft with the runway by determining the angle between the runway and the heading of the aircraft.