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Self-adapting excavation control system and method

  • US 5,682,312 A
  • Filed: 03/18/1996
  • Issued: 10/28/1997
  • Est. Priority Date: 03/23/1994
  • Status: Expired due to Fees
First Claim
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1. A control system for automatically controlling a work implement of an excavating machine through a machine work cycle, the work implement including a boom, stick and bucket, each being controllably actuated by at least one respective hydraulic cylinder, the hydraulic cylinders containing pressurized hydraulic fluid, the control system comprising:

  • memory means for storing a plurality of command signal magnitudes for controlling at least one hydraulic cylinder, the command signal magnitudes being represented by a plurality of control curves, each control curve corresponding to a material condition setting that is representative of a condition of an excavated material;

    logic means for selecting one of the plurality of control curves responsive to a determined said material condition setting indicated by the condition of the excavated material and producing command signals having a magnitude dictated by the selected said control curve; and

    actuating means for receiving the command signals and responsively actuating predetermined ones of the hydraulic cylinders to perform the work cycle.

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