Locus control system for construction machines

Details Locus control system for construction machines Locus control system for construction machines

1997-04-23

1999-07-06

Lopez, F. Daniel

Motors: expansible chamber type

Working member position feedback to motive fluid control

Electrical input and feedback signal means

172 45, 414699, F15B 903

Patent

active

059185279

ABSTRACT:
A locus control system of hydraulic excavators whereby a target locus for a front device is set beforehand. A control unit calculates a position and posture of the front device based on signals from angle sensors, and calculates a target speed vector of the front device based on signals from control lever devices. Through this calculation process, the control unit maintains the target speed vector as it is when the front device is not near the target locus, and modifies the target speed vector to a vector pointing to a second point on the target locus advanced in the excavating direction by a second distance from a first point located on the target locus at a minimum distance from a tip of the front device, when the front device is near the target locus.

REFERENCES:
patent: 4332517 (1982-06-01), Igarashi et al.
patent: 4889466 (1989-12-01), Jindai et al.
patent: 4910673 (1990-03-01), Narisawa et al.
patent: 5160239 (1992-11-01), Allen et al.
patent: 5308219 (1994-05-01), Lee et al.
patent: 5701691 (1997-12-01), Watanabe et al.
patent: 5735065 (1998-04-01), Yamagata et al.

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