JP2945933B

PROBLEM TO BE SOLVED: To provide a space stabilizing device which is excellent in impact resistance, and of which the cost can be reduced. SOLUTION: For an airframe guiding device 21, a scanning is performed in a pitch direction P by a galvano mirror 24 while a scanning is performed in a yaw direction Y by a polygon mirror 23 in an angle of visibility, and a frame image 29 is obtained by an image pick-up element 26. An electronic control unit 27 cuts out a window image 30 including a target 31, from the frame image 29, and detects an attitude angle displacement amount due to a fluctuation displacement of the airframe axis of the airframe by integration- operating an output from a rate sensor 28, and regarding the yaw direction Y, the cutting out position of the window image 30 is moved by a shifted portion of the frame image 29 by the fluctuation, and regarding the pitch direction P, the range where the galvano mirror 24 scans is changed in the opposite direction from the fluctuation direction of the airframe axis, in response to the attitude angle displacement amount in the pitch direction P to perform a space stabilization. In addition, the electronic control unit 27 performs a tracking operation to track the target 31 based on the window image 30.