Managing Steering with Short From Battery to Ground

摘要

A redundancy system for a steering system having a primary controller and a primary power source is provided. The redundancy system may include a secondary controller coupled to a secondary power source and configured to manage control of the steering system, and an interface circuit disposed between at least a first node and a second node. The first node may be in electrical communication with the primary power source, and the second node may be in electrical communication with the secondary power source. The interface circuit may be configured to selectively engage a self-test of the primary power source and the secondary power source, isolate a short at the first node from the secondary power source, and isolate a short at the second node from the primary power source.

主权项

1. A method of providing redundant control of a steering system using one of a first controller and a second controller, the method comprising the steps of:
providing an interface circuit between at least a first node and a second node of the steering system, the first node being electrically disposed between a primary power source and the first controller, the second node being electrically disposed between a secondary power source and the second controller; automatically engaging a self-test of the primary power source and the secondary power source upon machine startup; in response to a short at the first node, engaging the interface circuit to isolate the short from the secondary power source, and engage the second controller to operate the steering system; and in response to a short at the second node, engaging the interface circuit to isolate the short from the primary power source, and enable the first controller to operate the steering system.