Title:
TRIAXIAL CONTROLLER FOR DIRECTIONAL ANTENNA
Document Type and Number:
Japanese Patent JP3428858
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce target directional errors, especially a bearing-tracking error by accurately estimating a directional tracking error which occurs as following the delay of a servo control system and a residual error of step track, improving the quality of an error signal for controlling an Az-axis and controlling the Az-axis by using an error signal whose quality is improved.
SOLUTION: A parabolic antenna 16 is supported on a traveling body 26, which pitches and rolls such as a ship with a mount that has an Az-axis 10, an X-axis 12 and a Y-axis 14. A triaxial arithmetic control circuit 40 generates error signals for controls Δ&phiv xtd, Δθx and Δθy with roll rddet, pitch pddet, traveling body bearing &phiv g from rolling and pitching detectors 54 and 56, various navigation instruments and compass or the like which are mounted on the body 26, a receiving signal level and a synchronization detection signal. In particular, it generates an Az-error signal Δ&phiv xtd, based on the bearing &phiv g. This enables executing good tracking, even under a realistic environment in which the relative bearing of a target fluctuates dynamically and to improve a target tracking error.
Inventors:
Koichi Eguchi
Application Number:
JP14500997A
Publication Date:
July 22, 2003
Filing Date:
June 03, 1997
Export Citation:
Assignee:
Japan Radio Co., Ltd.
International Classes:
H01Q3/08; H01Q1/18; (IPC1-7): H01Q3/08; H01Q1/18
Domestic Patent References:
| JP5986908A | ||||
| JP690106A | ||||
| JP5987513A | ||||
| JP6067872A | ||||
| JP98533A |
Attorney, Agent or Firm:
Kenji Yoshida (1 person outside)
Previous Patent: SELF-TEMPERATURE ADJUSTING SHEET-LIKE HEATING ELEMENT
Next Patent: COOLING FAN AND MOTOR THEREWITH
Next Patent: COOLING FAN AND MOTOR THEREWITH