To provide a drive controller capable of sustaining a stabilized attitude autonomously through a small sale arrangement.

An abnormality in the driving system of a first motor 12 and an abnormality in the driving system of a second motor 13 are detected independently by means of controllers 50, 51 and 52. Detection results are delivered to majority decision circuits 70 and 71. The majority decision circuits 70 and 71 turn switches 64 and 65 on/off by a majority vote based on the detection results.