Patent ID: 11873617
Assignee: DEERE & COMPANY
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 5:
6. A method of controlling a mobile work machine that has a frame and a ground engaging blade, the method comprising:
receiving a geographic position signal from a geographic position system transmitter;
controlling an orientation of the blade, based on the geographic position signal, with a first grade control system;
identifying a predetermined target mainfall and cross slope of the grade while the first grade control system is controlling the orientation of the blade;
detecting interruption of the geographic position signal;
providing the predetermined target mainfall and cross slope of the grade to a second automatic grade control system, different from the first grade control system;
detecting an orientation of the blade;
detecting an orientation of the frame;
automatically switching to controlling the orientation of the blade with a second automatic grade control system, different from the first grade control system based on the detected interruption of the geographic position signal, wherein controlling the orientation of the blade with the second automatic grade control system comprises controlling the orientation of the blade with the second automatic grade control system based on the predetermined target mainfall and cross slope, the detected orientation of the blade, and the detected orientation of the frame.