Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Reexamination Certificate
1999-04-26
2001-03-27
Louis-Jacques, Jacques H. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
C701S050000, C701S058000, C701S059000, C172S003000
Reexamination Certificate
active
06208925
ABSTRACT:
TECHNICAL FIELD
This invention relates generally to a simplified method and system for determining torques and speeds of a powertrain for a machine resulting from predetermined loading conditions on an implement thereof, and more particularly, to a method and system for determining torques and speeds of a powertrain for a machine resulting from an implement loading condition using computer based models.
BACKGROUND ART
Currently, methods for simulating/predicting powertrain loading conditions such as component torques and speeds, involve creating a model of the machine powertrain system, the machine operator or control inputs, and the operating environment or duty cycle. Commonly referred to as “forward-solved” techniques, the machine response is governed primarily by the operator commands and the load imposed on the machine. When using such models, estimates are required regarding the machine operator's control inputs to “drive” the machine powertrain system in a manner representative of the desired operating work cycle. A limitation of this aspect of the forward-solved techniques is that it involves an iterative process wherein initial input commands are selected and subsequently modified until the desired response is achieved. Furthermore, to get accurate force determinations for the implement, a significant amount of model detail is typically required, which in turn often makes the model very sophisticated and complicated so as to require simulation experts for operation. Naturally, as a byproduct of the sophistication and complexity of these models, the alteration of these models is a very involved process. As a consequence, load prediction modeling using the known forward-solved methods is typically very time consuming, making them impractical for many applications.
Accordingly, the present invention is directed to overcoming one or more of the problems as set forth above.
DISCLOSURE OF THE INVENTION
In one aspect of the present invention, a simplified method for determining a loading condition on a powertrain of a machine as a result of a loading condition on an implement thereof is disclosed. The present method includes the step of inputting a predetermined plurality of parameter signals representative of a loading condition on the implement into an implement loading model and responsively determining a plurality of implement loading modeled values. The method further includes the steps of inputting the implement loading modeled values into a kinematic linkage model and responsively determining a plurality of modeled linkage loading values as a function of the inputted implement loading modeled values and a plurality of known linkage parameter values and, inputting the modeled linkage loading values into a machine powertrain loading model to determine a plurality of powertrain loading modeled values indicative of the loading condition on the powertrain.
In another aspect of the present invention, a system for determining a loading condition on a powertrain of a machine resulting from a loading condition on an implement thereof using computer based models is disclosed. An electronic controller is utilized for inputting a predetermined plurality of parameter signals representative of the loading condition on the implement into an implement loading model to determine a plurality of implement loading modeled values as a function of the inputted loading parameter signals. The electronic controller is further utilized for inputting the implement loading modeled values into a kinematic linkage model to determine a plurality of modeled linkage loading values as a function of the inputted implement loading modeled values and a plurality of known linkage parameter values, and for inputting the modeled linkage loading values into a machine powertrain loading model to determine a plurality of powertrain loading modeled values indicative of the loading condition on the powertrain.
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Creger Todd D.
Ferrier James T.
Caterpillar Inc.
Haverstock Garrett & Roberts
Louis-Jacques Jacques H.
Lundquist Steve D.
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