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US 4,069,412 AGranted
Area navigation system
AssigneeAir Data, Inc.
InventorsGeorge B. Foster, Paul Douglas Gibbs
Life of this patent
Estimating the term…
Abstract
There is disclosed an area navigation system including signal averaging and lag compensation circuits to overcome VOR signal propagation instabilities and a meter sensitivity control circuit which decreases the sensitivity of a track angle deviation left-right needle display as the aircraft approaches a waypoint. Means are also provided for digitally displaying the aircraft bearing to the waypoint.
Claims18
An area navigation system comprising:
- first means for receiving station-to-aircraft vector angle signals;
- processing means including averaging means coupled to said first receiving means for averaging said vector signals, and lag compensation means coupled to said averaging means, said lag compensation means, including means responsive to the amount of phase lag introduced by said averaging means for adjusting the degree of lag compensation;
- second means for receiving station-to-aircraft magnitude signals;
- a waypoint-to-aircraft vector computer having said signals from said processing means and said second receiving means coupled thereto;
- a station-to-waypoint vector generator, also coupled to said computer, to produce an electrical output signal representative of the corresponding waypoint-to-aircraft vector;
- and means coupled to said computer output signal for developing a display of the value of said aircraft-to-waypoint vector.
3 more elements
In an area navigation system comprising;
- first means for receiving station-to-aircraft vector angle signals;
- second means for receiving station-to-aircraft magnitude signals;
- a waypoint-to-aircraft vector computer having said signals from said second receiving means coupled thereto;
- a station-to-waypoint vector generator, also coupled to said computer, to produce an electrical signal representative of the corresponding waypoint-to-aircraft vector;
- the improvement comprising:
- a distance generator coupled to the output of said computer for developing a distance display signal, an angle generator coupled to the output of said computer for developing an angle display signal, a meter for displaying said angle and deviation from a selected track to waypoint signal, and sensitivity adjustment means responsive to said distance signal for reducing the sensitivity of said meter as said distance signal becomes smaller.
3 more elements
Dependencies are inferred from the claim text.