| 摘要 |
PROBLEM TO BE SOLVED: To solve the problems that an airborne satellite tracking antenna, which is controlled on the basis of the position and attitude data measured by an inertial reference unit (IRU) installed in the front part of an airframe, is not accurately controlled owing to a bend and a twist in the airframe and that irregular response delay of the IRU causes inability to achieve accurate control. SOLUTION: An angular velocity sensor 6 having higher-speed responsivity than the frequency of a bend or vibration of the airframe 1 is attached to an antenna support 3 installed in the airframe 1. In addition to the position and attitude data of an aircraft 1 measured by the IRU 2, angle data and angular velocity data are added to correct a control error caused by a bend and a twist in the airframe 1. An output of the IRU 2 is averaged in time to remove irregular response delay and is then corrected with the data of the angular velocity sensor 6 to be corrected to data having high-speed responsivity. COPYRIGHT: (C)2005,JPO&NCIPI
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