Patent ID: 6079131
Filing Date: 2000-06-27
Classification: E02F

Abstract:
An operation control system for a 3-articulation type excavator (1) comprising an excavator body (99), a 3-articulation type work front (2) having a first arm (3) rotatably attached to said excavator body, a second arm (4) rotatably attached to said first arm and a third arm (5) rotatably attached to said second arm, and a hydraulic drive system (260, 261) including a first arm actuator (7) for driving said first arm, a second arm actuator (8) for driving said second arm, and a third arm actuator (9) for driving said third arm, wherein said operation control system comprises:two operating means (11, 12) for operating said first arm (3), said second arm (4) and said third arm (5), andcommand calculating means (131,) including an imaginarily provided virtual 2-articulation type work front having a virtual first arm (13 or 13A) and a virtual second arm (14) and a preset relationship in movement between said virtual second arm (14) and said actual third arm (5) for determining respective command values for said actual first arm, said actual second arm and said actual third arm, such that said actual third arm (5) is moved correspondingly to movement of said virtual second arm (14) resulted when said two operating means (11, 12) functions respectively as first operating means (11) for said virtual first arm (13 or 13A) and second operating means (12) for said virtual second arm (14), and outputting those command values as driving command signals for said hydraulic drive system (260, 261).