MACHINE LEARNING DEVICE, ACCELERATION AND DECELERATION ADJUSTMENT DEVICE, AND COMPUTER-READABLE STORAGE MEDIUM

A machine learning device that estimates parameters that relate to the control of the movement amount in each control cycle and include Nth-order time differential elements of each axis of a machine tool that machines workpieces, the machine learning device comprising: a state observation unit that observes data indicating the movement state of the machine tool; a determination condition acquisition unit that acquires, as determination data, target values relating to the data observed by the state observation unit; a reward calculation unit that calculates, on the basis of the state data and the determination data, rewards associated with machining based on the parameters; a value function update unit that updates value functions on the basis of the rewards; and a decision-making unit that estimates, on the basis of the value functions, combinations of set values of the parameters that are more suitable for the machining, and outputs said combinations.