公开(公告)号：US3619580A

公开(公告)日：1971-11-09

申请号：US3619580D

申请日：1969-11-19

申请人： EDWIN JACK BARBER ,  DECCA LTD

发明人： SWALE ROY THURSTON

IPC分类号： G01C21/12 ,  G01C21/22 ,  G01S1/02 ,  G06F15/50

CPC分类号： G01C21/22 ,  G01C21/12 ,  G01S1/02

摘要： A navigational aid including a position display device driveable to indicate orthogonal position coordinates of an aircraft in response to received pulses from a resolver fed by a transducer that responds to air speed. For each coordinate direction a bidirectional counter stores an estimated component of wind velocity and controls by a diode matrix the feeding to drive means for the display of additional pulses at a rate proportional to the component of wind velocity. At the end of an elapsed time pulses are fed to the counters to correct the stored component of wind velocity and a number of pulses proportional to the product of the elapsed time and the correction to a respective counter is fed to the drive means for correcting each indicated coordinate. Thus the stored components of wind velocity are accurately adjusted automatically by correcting the indicated coordinates.