摘要:
A servo controller, capable of controlling the motion of a movable body with high accuracy, without depending on the position of the movable body which is moved on a ball screw. The servo controller has a position command generating part which generates a position command value; a velocity command generating part which generates a velocity command value based on the position command value and a position detection value; a torque command generating part which generates a torque command value based on the velocity command value and a velocity detection value; and a position compensation calculating part which calculates an amount of expansion/contraction of the ball screw based on a distance from the servomotor to a nut threadably engaged with the ball screw and the torque command value, and calculates a position compensation based on the amount of expansion/contraction.
摘要:
The invention relates to a control method for a painting robot, comprising the following steps: (a) a robot path is set using several path points that are to be traversed by a reference point of the robot and are each defined by space coordinates; (b) the space coordinates of the individual path points are converted into corresponding axis coordinates according to inverse robot kinematics, said axis coordinates reproducing the position of the individual robot axes in the respective path points; (c) axis-related regulators for the individual robot axes are triggered according to the converted axis coordinates; (d) axis-related driving motors are triggered in the individual robot axes by means of the associated axis-related regulators; (e) corrective path values for the individual path points are calculated according to a dynamic robot model, said corrective path values taking into account the elasticity and/or friction and/or inertia of the robot; (f) corrected axis coordinates for the individual path points are calculated from the non-corrected axis coordinates of the individual path points and the corrective path values; (g) the axis-related regulators are triggered using the corrected axis coordinates.
摘要:
A method and system are disclosed for adjusting the torque of a motor for a HVAC actuator based upon one or more operating conditions of the HVAC actuator. One illustrative HVAC actuator includes an actuated part, a motor for providing a torque to move the actuated part, a detector for detecting an operating condition in or around the HVAC actuator, and a controller for adjusting the torque in accordance with the detected operating condition.
摘要:
A method and system are disclosed for adjusting the torque of a motor for a HVAC actuator based upon one or more operating conditions of the HVAC actuator. One illustrative HVAC actuator includes an actuated part, a motor for providing a torque to move the actuated part, a detector for detecting an operating condition in or around the HVAC actuator, and a controller for adjusting the torque in accordance with the detected operating condition.
摘要:
A positioning control system for positioning a moving element on a basis of position command data is provided with a feedback loop. The system is also provided with a loop gain modifier for determining a loop gain, which is to be used in a following positioning operation, on a basis of a difference between an amount of overshoot measured in a current positioning operation and a predetermined tolerance or on a basis of a difference between an amount of overshoot measured in a current positioning operation and a first predetermined tolerance and a difference between an amount of undershoot measured in the current positioning operation and a second predetermined tolerance. The first and second tolerances may preferably be the same in absolute value. The moving element may specifically be a steerable mirror for drilling holes in a work by reflecting a laser beam. Also disclosed is a laser drilling machine including the system.
摘要:
A method for compensating for variations in the operating efficiency of electric motors used in plastic processing machines. The current to the motor is continually monitored during all periods of operation to identify variations in the motor's actual efficiency as it relates to measurable machine performance. Normal operation of the electric motor is monitored to establish baseline current usage for the various periods of the operating cycle under given conditions. With a baseline established, variations in motor efficiency can be detected by monitoring the current during closed loop control of specific parameters and comparing the results to the baseline. Since the parameter is held constant by virtue of the closed loop, a deviation in current from the baseline indicates a change in efficiency. Based on the identified variance, the current to the motor during other (open loop) operations can be adjusted accordingly.