To more rapidly change the direction of a body when higher response time is required by connecting a variable straight direction automated controller with a tail controlling automatic controller through mixed filter means.

A pluality of controllable actuators 17 are connected with an orbit correcting light rocket 15 and a tail 13, and a controller 12 controls a plurality of the tails 13 and the orbit correcting light rocket 15 through the actuators 17. There is provided a tail controlling automatic controller 21 for controlling the movement of the tail 13 is a combination with a variable straight direction automatic controller 22 for controlling a plurality of the orbital correcting light rockets 15. When acceleration is desired, a missile 11 is balanced on the basis of a fact that pitching moment produced by the tail 13 is inversely proportional to that produced by a body of the missile 11. Hereby, higher acceleration capability and rapid response are both ensured.