A blade control system is configured to control the spatial orientation of an earthmoving blade mounted on a frame of an earthmoving machine for working a surface of earth to a desired shape. The blade slope angle required to maintain a selected cross-slope angle is calculated and the blade slope is...http://www.google.com.au/patents/US6112145?utm_source=gb-gplus-sharePatent US6112145 - Method and apparatus for controlling the spatial orientation of the blade on an earthmoving machine
