| 摘要 |
<p>PURPOSE:To adopt a small-sized and inexpensive actuator and permit the back-up in anomaly by putting at least one among a plurality of actuators for driving a steering mechanism into an inoperative state in the high speed operation and switching the actuator to other state when anomaly is detected. CONSTITUTION:The first and second controllers C1 and C2 output the operation signals of a plurality of actuators A1 and A2 on the basis of the signals supplied from an automatic steering switch 31, car speed sensor 32 and a tracking sensor 33. When the car speed is over a set value, the first actuator A1 is put into operation state, and the second actuator A2 is held in a nonoperation state. While, in the low speed operation, both the actuators A1 and A2 are put into operation states, and a sufficiently large steering power is obtained. Further, when the state of the actuator A1 is monitored, and anomaly is detected, the first actuator A1 is switched to an inoperative state, and the second actuator A2 is switched to an operation state.</p> |
