Engine accessory disconnect system

A method for disconnecting a driven member from a driving member, the method comprising:

• receiving, by a controller, an indication of a rotation speed of the driven member;
• determining, by the controller, a disconnect threshold based on the rotation speed;
• receiving, by the controller from a vibration detection device, a vibration signal that is indicative of a vibration level of the driven member;
• determining, by the controller, that the received vibration signal satisfies a threshold condition, wherein determining that the received vibration signal satisfies the threshold condition comprises determining that a magnitude of the received vibration signal exceeds the disconnect threshold;
• and
• based at least on the determination that the received vibration signal satisfies the threshold condition, triggering, by the controller, a mechanical disconnection of the driven member from the driving member by a mechanical disconnect device.

A system comprising:

• a vibration detection device configured to output vibration signals while a driving member drives a driven member;
• and
• a controller comprising at least one processor, the controller arranged to (i) determine that a vibration signal output by the vibration detection device satisfies a maintenance threshold condition (ii) based at least on the determination that the vibration signal satisfies the maintenance threshold condition, trigger generation of a maintenance notification,
• wherein determining that the vibration signal satisfies the maintenance threshold condition comprises determining that a magnitude of the vibration signal exceeds a maintenance threshold but does not exceed a disconnect threshold.