Patent ID: 7175133

Claim:
A wing driving apparatus comprising: (a) a first actuator and a second actuator coupled to a wing; (b) a first controller unit for controlling the first actuator; (c) a second controller unit for controlling the second actuator, and (d) a drive signal generator part ( 150 , 250 ) which generates a drive signal for driving the wing and sending the drive signal to the first and second control unit, wherein the first controller unit includes a first drive controller part for controlling the first actuator in accordance with the drive signal, the second controller unit includes a second drive controller part for controlling the second actuator in accordance with the drive signal, the first actuator including a first controlled valve for controlling a supply and discharge of a fluid into and out from the first actuator, a first mode switching valve having a drive mode position and a follower mode position in a fluid circuit of the first actuator, and a main switching signal device for controlling a switching position of the first mode switching valve, the second actuator including a second controlled valve for controlling a supply and discharge of a fluid into/from the second actuator, a second mode switching valve having a drive mode position and a follower mode position in a fluid circuit of the second actuator, and a first switching signal device for controlling a switching position of the second mode switching valve, the second actuator further including a second switching signal device other than the first switching signal device for controlling the second mode switching valve, the first control unit further including a follower signal generating part which generates a follower signal by which the second actuator is followed with the wing, the follower signal generating part sending the follower signal to the second switching signal device, and the second switching signal device being adapted to switch the position of the second mode switching mode valve to the follower mode position in accordance with the follower signal regardless of the status of the first switching signal device, so that the second actuator is followed with actuation of the wing.