Learning device, control device, learning method, and storage medium

A learning device comprising:

• a memory configured to store instructions;
• and
• a processor configured to execute the instructions to:
• select, from among search points indicating an operation of a control target, a search point to be subjected to training data acquisition for learning of a control of the control target;
• calculate information indicating an evaluation of whether or not an operation indicated by the selected search point is executable, and an output value for the operation indicated by the selected search point to be output by a controller for controlling the control target;
• acquire, based on the selected search point, the information indicating the evaluation of whether or not the operation indicated by the selected search point is executable, and the output value for the operation indicated by the selected search point to be output by the controller, training data for learning a control of the control target that is performed by the controller;
• and
• determine, based on an evaluation of an acquisition status of the training data, whether or not to continue acquiring the training data.