Communications: directive radio wave systems and devices (e.g. – Directive – Including antenna orientation
Patent
1986-03-28
1988-02-16
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including antenna orientation
343714, 318649, 364434, H01Q 132, H01Q 308
Patent
active
047258438
ABSTRACT:
The location of a vehicle itself is detected on the vehicle in combination with an attitude control of an antenna mounted on the vehicle so that the antenna is directed toward a geostationary satellite. The antenna is driven for rotation about both a horizontal and a vertical shaft. A mean running speed MVb and a mean azimuth MQd of the vehicle over a time interval t.sub.2 are used to calculate corrections .DELTA.Px and .DELTA.Py to the vehicle location, which corrections are added to vehicle location data corresponding to the starting point of the interval t.sub.2. A mean azimuth MQd, a mean speed MVb, a mean roll angle MQr and a mean pitch angle MQp are used to control shifts .DELTA.Qdpo and .DELTA.Qppo which occur in the antenna attitude relative to the geostationary satellite as a result of the running of the vehicle over the time interval t.sub.2, and these shifts are used to correct the antenna attitude. In order to allow the antenna to be maintained as directed toward the geostationary satellite if the vehicle rapidly changes its direction of travel, the antenna attitude is controlled in advance in accordance with rates of change in running speed Vb, throttle opening Op, angle of rotation of steering wheel Sa, roll angle Qr and pitch angle Qd of the vehicle, by detecting these rates of change.
REFERENCES:
patent: 3947807 (1976-03-01), Tyler et al.
patent: 4035805 (1977-07-01), Mobley
patent: 4630056 (1986-12-01), Noguchi et al.
Suzuki Katsuo
Yamada Takahiro
Aisin Seiki Kabushikikaisha
Barron Jr. Gilberto
Blum Theodore M.
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