Systems and methods of providing ride control with a power machine
AssigneeDoosan Bobcat North America, Inc.
InventorChristopher Young
Life of this patent
Estimating the term…
Abstract
Automated operation methods and systems are provided for power machines. One system includes implementing ride control for an electric power machine. The system may include an electronic processor configured to determine a target lift position and an initial electric current for holding a load at the target lift position. The electronic processor may also be configured to determine, based on a positional deviation of the load from the target lift position, an updated electric current for returning the load to the target lift position. The electronic processor may also be configured to control an electric lift actuator to return the load to the target lift position using the updated electric current.
Claims20
A system for controlling an electric power machine, the system comprising:
- one or more electronic processors in electrical communication with an electric lift actuator of a lift assembly of the electric power machine and configured to:
- receive operational data for the electric power machine;
- determine, based on the operational data, a target lift position for the electric lift actuator;
- determine, based on the operational data, an initial electric current of the electric lift actuator corresponding to the target lift position;
- determine, based on the operational data, a present lift position of the electric lift actuator;
- determine an updated electric current for the electric lift actuator based on the target lift position, the initial electric current, and the present lift position;
- and
- control the electric lift actuator using the updated electric current, to maintain or return to the target lift position while the electric power machine performs a tractive operation.
A method for controlling an electric power machine, the method comprising:
- upon activation of a ride control mode for the electric power machine:
- determining, with one or more electronic processors, a target lift position for a lift assembly of the electric power machine;
- determining, with the one or more electronic processors, an initial electric current of the lift assembly for the target lift position;
- and
- determining, with the one or more electronic processors, a present lift position of the lift assembly;
- determining, with the one or more electronic processors, an updated electric current for an electric lift actuator of the lift assembly, based on the target lift position, the initial electric current, and the present lift position;
- and
- controlling, with the one or more electronic processors, the electric lift actuator using the updated electric current to maintain the target lift position.
An electric power machine, the electric power machine comprising:
- a frame;
- a plurality of electric actuators supported by the frame, wherein the plurality of electric actuators includes an electric lift actuator;
- a lift arm structure that includes:
- a lift arm coupled to the frame and configured to be moved relative to the frame by the electric lift actuator;
- an electric power source configured to power the plurality of electric actuators;
- and
- one or more electronic processors in communication with the plurality of electric actuators, the one or more electronic processors configured to:
- monitor operational data for the electric power machine, the operational data including data associated with a first control parameter and a second control parameter;
- control the electric lift actuator using a first control parameter when a first operation mode is active;
- detect activation of a ride control mode for maintaining or returning to a target lift position during tractive operations;
- and
- responsive to activation of the ride control mode for the electric power machine, control the electric lift actuator to maintain or return to the target lift position using the second control parameter while the electric power machine performs a tractive operation, the second control parameter being different from the first control parameter.
Dependencies are inferred from the claim text.