A fan control apparatus is provided for the computer equipment including a fan, a temperature sensor, and a device module (e.g. an add-in card) mounting at least two devices aligned along an air flow. The fan control apparatus determines a revolving speed of the fan for cooling each device based on an inlet temperature and a usage rate of each device. In addition, the fan control apparatus estimates an inlet temperature of a second device, which is disposed in the downstream side of a first device among at least two devices, based on an inlet temperature and a usage rate of the first device. Thus, it is possible to control the fan to cause an adequate amount of cooling air for cooling devices mounted on the device module installed in the computer equipment.

A numerical control device includes: a program analyzing unit analyzing a transition of a moving velocity of a machining head and a transition of a supply amount of a material supplied to a beam-irradiation position based on a machining program; a movement distance calculating unit calculating a first distance based on a result of analysis performed by the program analyzing unit, the first distance being a length of a first movement section to a first position at which addition of the material to the workpiece is started, the first movement section being a section through which the machining head is moved while the head is accelerated; and a condition command generating unit generating a supply command to increase the supply amount of the material per hour from zero to a command value according to a machining condition while the machining head is moved through the first movement section.

A numerical control device includes: a program analyzing unit analyzing a transition of a moving velocity of a machining head and a transition of a supply amount of a material supplied to a beam-irradiation position based on a machining program; a movement distance calculating unit calculating a first distance based on a result of analysis performed by the program analyzing unit, the first distance being a length of a first movement section to a first position at which addition of the material to the workpiece is started, the first movement section being a section through which the machining head is moved while the head is accelerated; and a condition command generating unit generating a supply command to increase the supply amount of the material per hour from zero to a command value according to a machining condition while the machining head is moved through the first movement section.

A fan control apparatus is provided for the computer equipment including a fan, a temperature sensor, and a device module (e.g. an add-in card) mounting at least two devices aligned along an air flow. The fan control apparatus determines a revolving speed of the fan for cooling each device based on an inlet temperature and a usage rate of each device. In addition, the fan control apparatus estimates an inlet temperature of a second device, which is disposed in the downstream side of a first device among at least two devices, based on an inlet temperature and a usage rate of the first device. Thus, it is possible to control the fan to cause an adequate amount of cooling air for cooling devices mounted on the device module installed in the computer equipment.

A motion control method includes: (a) obtaining a current position and a current velocity of a control object at a current time; (b) obtaining a current acceleration based on the current position and the current velocity, wherein the current acceleration has a positive correlation with a difference between the current position and a target position as well as a negative correlation with the current velocity; (c) controlling a motor for driving the control object utilizing the current acceleration; and (d) iteratively performing the steps (a)-(c) until the control object reaches the target position. A motion trajectory planning method and a motion control device are further provided. Through the above-mentioned way, the present disclosure could realize the smooth acceleration and smooth deceleration of the motor. As a result, smooth motion trajectory, less vibration, and stable motor with less overshoot could be achieved.

A motion control method includes: (a) obtaining a current position and a current velocity of a control object at a current time; (b) obtaining a current acceleration based on the current position and the current velocity, wherein the current acceleration has a positive eon-elation With a difference between the current position and a target position as well as a negative correlation with the current velocity; (c) controlling a motor for driving the control object utilizing the current acceleration; and (d) iteratively performing the steps (a)-(c) until the control object reaches the target position. A motion trajectory planning method and a motion control device are further provided. Through the above-mentioned way, the present disclosure could realize the smooth acceleration and smooth deceleration of the motor. As a result, smooth motion trajectory, less vibration, and stable motor with less overshoot could be achieved.