Controlling a crowd parameter of an industrial machine
View Patent ↗An industrial machine that includes a dipper, a dipper handle, a boom, a crowd motor, a hoist motor, a swing motor, a first sensor, a second sensor, and a controller. The first sensor generates a first signal related to a dipper handle angle and the second sensor generates a second signal related to a hoist rope angle. The first signal and the second signal are received by the controller. The controller determines, based on the first and second signals, a retract torque value. The retract torque value is compared to a retract torque threshold values. If the retract torque value is greater or equal to the threshold value, the retract torque of the crowd motor is set to a maximum value. If the retract torque is less than the threshold value, the retract torque of the crowd motor is set to a default value.
1. An industrial machine comprising:
a dipper;
a dipper handle;
a boom;
a crowd motor;
a hoist motor;
a swing motor;
a first sensor operable to generate a first signal related to a dipper handle angle;
a second sensor operable to generate a second signal related to a hoist rope angle; and
a controller configured to
receive the first signal related to the dipper handle angle and the second signal related to the hoist rope angle,
determine a retract torque value based on the first signal and the second signal,
compare the retract torque value to a retract torque threshold value, and
responsive to determining the retract torque value is greater or equal to the retract torque threshold value, set a retract torque of the crowd motor to a maximum value.
2. The industrial machine of claim 1 , wherein the industrial machine is a hydraulic machine.
3. An industrial machine comprising:
a dipper;
a dipper handle;
a boom;
a crowd motor;
a hoist motor;
a swing motor;
a first sensor operable to generate a first signal related to a dipper handle angle;
a second sensor operable to generate a second signal related to a hoist rope angle; and
a controller configured to
receive the first signal related to the dipper handle angle and the second signal related to the hoist rope angle,
determine a retract torque value based on the first signal and the second signal,
compare the retract torque value to a retract torque threshold value, and
responsive to determining the retract torque value is less than the retract torque threshold value, set a retract torque of the crowd motor to a default value.
4. The industrial machine of claim 3 , wherein the industrial machine is a hydraulic machine.
5. An industrial machine comprising:
a dipper;
a dipper handle;
a boom;
a crowd motor;
a hoist motor;
a swing motor;
a first sensor operable to generate a first signal related to a dipper handle angle;
a second sensor operable to generate a second signal related to a hoist rope angle; and
a controller configured to
receive the first signal related to the dipper handle angle and the second signal related to the hoist rope angle,
determine a retract torque value based on the first signal and the second signal,
compare the retract torque value to a retract torque threshold value, and
responsive to determining the retract torque value is less than the retract torque threshold value, set a retract torque of the crowd motor to a value that is determined as a function of a parameter of the industrial machine.
6. The industrial machine of claim 5 , wherein the parameter of the industrial machine includes the dipper handle angle and the hoist rope angle.
7. The industrial machine of claim 5 , wherein the function is selected from the group consisting of a linear function, a non-linear function, a quadratic function, a cubic function, an exponential function, a hyperbolic function, and a power function.
8. The industrial machine of claim 5 , wherein the retract torque corresponds to a maximum amount of retract torque that is required for a given portion of a digging cycle.
9. The industrial machine of claim 8 , wherein the retract torque early in the digging cycle has a greater value than the retract torque late in the digging cycle.
10. The industrial machine of claim 5 , wherein the parameter of the industrial machine includes a tipping moment of the industrial machine.
11. The industrial machine of claim 5 , wherein the parameter of the industrial machine is a position of a component of the industrial machine.
12. The industrial machine of claim 11 , wherein the component of the industrial machine is a dipper.
13. The industrial machine of claim 5 , wherein the industrial machine is a hydraulic machine.