Articulation control system having steering path tracking
First Claim
1. An articulation control system for a mobile machine having a traction device, the articulation control system comprising:
- a speed sensor configured to generate a first signal indicative of a travel speed of the mobile machine;
a steering angle sensor configured to generate a second signal indicative of a steering angle of the traction device;
an articulation actuator configured to articulate a front frame of the mobile machine relative to a rear frame of the mobile machine; and
a controller in communication with the speed sensor, the steering angle sensor, and the articulation actuator, the controller being configured to;
calculate and store a travel path corresponding to a moving location of the front frame based on the first and second signals, the travel path including a plurality of discrete sequential points;
select one of the discrete sequential points of the travel path as a desired path point; and
regulate operation of the articulation actuator, based at least on a location of the desired path point of the calculated and stored travel path, to cause the rear frame to follow the travel path of the front frame.
2 Assignments
0 Petitions
Accused Products
Abstract
An articulation control system is disclosed for use with a mobile machine having a traction device. The articulation control system may have a speed sensor configured to generate a first signal indicative of a travel speed of the mobile machine, a steering angle sensor configured to generate a second signal indicative of a steering angle of the traction device, and an articulation actuator configured to articulate a front frame of the mobile machine relative to a rear frame of the mobile machine. The articulation control system may also have a controller in communication with the speed sensor, the steering angle sensor, and the articulation actuator. The controller may be configured to track a travel path of the front frame based on the first and second signals, and to regulate operation of the articulation actuator to cause the rear frame to follow the travel path of the front frame.
92 Citations
18 Claims
-
1. An articulation control system for a mobile machine having a traction device, the articulation control system comprising:
-
a speed sensor configured to generate a first signal indicative of a travel speed of the mobile machine; a steering angle sensor configured to generate a second signal indicative of a steering angle of the traction device; an articulation actuator configured to articulate a front frame of the mobile machine relative to a rear frame of the mobile machine; and a controller in communication with the speed sensor, the steering angle sensor, and the articulation actuator, the controller being configured to; calculate and store a travel path corresponding to a moving location of the front frame based on the first and second signals, the travel path including a plurality of discrete sequential points; select one of the discrete sequential points of the travel path as a desired path point; and regulate operation of the articulation actuator, based at least on a location of the desired path point of the calculated and stored travel path, to cause the rear frame to follow the travel path of the front frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method of controlling articulation of a mobile machine having a traction device, the method comprising:
-
detecting a travel speed of the mobile machine; detecting a steering angle of the traction device; calculating and storing a travel path corresponding to a moving location of a front frame of the mobile machine based on the travel speed and the steering angle, the travel path including discrete sequential points; selecting one of the discrete sequential points of the travel path as a desired path point; and articulating the front frame relative to a rear frame of the mobile machine, based at least on a location of the desired path point of the calculated and stored travel path, to cause the rear frame to follow the travel path of the front frame. - View Dependent Claims (14, 15, 16, 17)
-
-
18. An articulated machine, comprising:
-
a front axle connecting opposing front traction devices; a front frame supported by the front axle; an operator station mounted to the front frame; tandem rear axles each supporting opposing rear traction devices; a rear frame supported by the tandem rear axles; an engine mounted to the rear frame and configured to drive the rear traction devices; an articulation joint pivotally connecting the front and rear frames; an articulation actuator configured pivot the front frame relative to the rear frame about the articulation joint; a speed sensor configured to generate a first signal indicative of a travel speed of the articulated machine; a steering angle sensor configured to generate a second signal indicative of a steering angle of the front traction devices; an articulation sensor configured to generate a third signal indicative of an actual articulation angle of the front frame relative to the rear frame; and a controller in communication with the articulation actuator, the speed sensor, the steering sensor, and the articulation sensor, the controller being configured to; calculate and store a travel path corresponding to a moving location of the front frame based on the first, second, and third signals, the travel path including a plurality of discrete sequential path points; select, from the plurality of discrete sequential path points, a desired path point for use in controlling articulation of the machine; determine a desired articulation angle, based at least on the desired path point, that should cause the rear frame to follow the travel path of the front frame; and regulate operation of the articulation actuator based on the desired and actual articulation angles.
-
Specification