Work vehicle with implement self-leveling functionality including rollback prevention and related systems and methods

A method for automatically adjusting the position of an implement of a lift assembly of a work vehicle, the lift assembly comprising a boom coupled to the implement, the method comprising:

• receiving, with a computing system, an input associated with raising the boom relative to the ground, the implement being initially oriented at an implement angle that differs from a target implement angle;
• monitoring, with the computing system, the implement angle relative to the target implement angle as the boom is being raised;
• determining, with the computing system, that the implement angle has initially reached the target implement angle;
• identifying, with the computing system, an implement angle error relative to the target implement angle as the boom is moved following the target implement angle initially being reached;
• executing, with the computing system, closed-loop position control to control movement of the implement when the implement angle error is a positive implement angle error, wherein execution of the closed-loop position control comprises:
• generating, with the computing system, a first closed-loop valve command signal based at least in part on the positive implement angle error;
• and
• controlling, with computing system, an operation of at least one valve associated with the implement based at least in part on the first closed-loop valve command signal to adjust the implement angle back towards the target implement angle;
• and
• executing, with the computing system, closed-loop velocity control to control movement of the implement when the implement angle error is a negative implement angle error, wherein execution of the closed-loop velocity control comprises:
• generating, with the computing system, a second closed-loop valve command signal based at least in part on a velocity error associated with the implement;
• and
• controlling, with computing system, the operation of the at least one valve based at least in part on the second closed-loop valve command signal to adjust the implement angle back towards the target implement angle.

A system for controlling the operation of a work vehicle, the system comprising:

• a lift assembly including a boom and an implement coupled to the boom;
• at least one tilt valve in fluid communication with a corresponding tilt cylinder, the at least one tilt valve being configured to control a supply of hydraulic fluid to the tilt cylinder to adjust a position of the implement relative to the boom;
• a computing system communicatively coupled to the at least one tilt valve, the computing system being configured to:
• receive an input associated with raising the boom relative to the ground, the implement being initially oriented at an implement angle that differs from a target implement angle;
• monitor the implement angle relative to the target implement angle as the boom is being raised;
• determine that the implement angle has initially reached the target implement angle;
• identify an implement angle error relative to the target implement angle as the boom is moved following the target implement angle initially being reached;
• select a closed-loop control algorithm to control movement of the implement based at least in part on a sign of the implement angle error, the closed-loop control algorithm corresponding to a closed-loop position control algorithm when the implement angle error is a positive implement angle error and a closed-loop velocity control algorithm when the implement angle error is a negative implement angle error;
• generate a closed-loop valve command signal using the closed-loop control algorithm;
• and
• control an operation of the at least one tilt valve based at least in part on the closed-loop valve command signal to adjust the implement angle back towards the target implement angle.