摘要:
A position control system has a speed control loop for generating a torque command signal for a motor from the speed deviation between a speed command and an actual speed. The position control system includes command subdividing means (2) for subdividing the speed deviation (.epsilon.(i)) into a predetermined minute amount (.epsilon..sub.2 (i)=.alpha.) and a remaining amount (.epsilon..sub.1 (i)=.epsilon.(i)-.alpha.), integrating meand (3) for integrating the remaining amount (.epsilon..sub.1 (i)), and incompletely integrating means (4) for incompletely integrating the minute amount (.epsilon..sub.2 (i)). The output from the integrating means (3) and the output from the incompletely integrating means (4) are added, and the sum is issued as a torque command signal.
摘要:
A servo system for controlling the position and speed of movable members coupled to the shaft of a motor. To maintain these members as accurately as possible in the desired position, the motor is included in a servoloop having a critical setting so that this setting is established only during the operative condition of the members coupled to the motor shaft. Moreover, the critical setting is automatically re-adjustable.
摘要:
In a point-to-point control system of a modified, optimum, nonlinear type, a digital servomechanism employs an error counter receiving an input from a position-error-to-frequency-converter. The counter has a limited range, which, when exceeded, applies additional input to the servomechanism for producing rapid traverse. The error-to-frequency-converter normally receives a maximum input greater than the actual position error, until a deceleration range is detected, at which point the error-tofrequency-converter directs the servomechanism''s error counter for bringing about rapid deceleration. The normal counter limits are also exceeded during deceleration for bringing about increased servomechanism gain and braking toward final position. As soon as substantial deceleration has taken place, such that the counter limits are no longer exceeded, the counter directs a deceleration which is linear with respect to the distance-to-go, for final, accurate servomechanism positioning.
摘要:
An electrical machining method comprises machining a workpiece by an electrical machining device comprising an electrode; increasing a feedrate of the electrode at a first acceleration if a discharge current passing through the electrode and the workpiece is lower than a discharge current reference; and decreasing the feedrate of the electrode at a second acceleration if the discharge current is higher than the discharge current reference, wherein the second acceleration has an absolute value higher than that of the first acceleration.
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 control circuit for manual forced control of a unit, this circuit including a manually operated switch of a non-locking type, to eliminate the need for visual examination. The switch returns to its initial state when the manual force applied to it has been ended. The control circuit includes a first switch having a first input for receiving a control pulse actuated by the use of the switch manually operated switch, a set input for receiving a set signal, an output connected to the unit which is to be controlled, changing its state to a predetermined set state in response to a set signal, changing its state in response to a control pulse, and remaining in the same state until a following control pulse or set signal is inputted.
摘要:
The position of a controlled system is regulated with a hydraulic actuator, which is directly linked to a hydraulic pump. The pump is driven in either direction by an electric motor, which is controlled by the output of rotatory direction and driving power generated from a controller based on a desired position and the feedback input of the actual position of the controlled system and the rotatory speed of the electric motor. The controller further includes a gain-variable amplifier for amplifying a deviation of the controlled value from a desired value with a gain characteristic curve of a shape appropriate to the controlled system, attaining a stable and well follow-up control of position.
摘要:
A controller used for irradiating a laser beam to an object from a machining head at a reference gap position is provided. The controller includes a gap sensor for detecting an amount of gap between the machining head and the object, a gap position command calculation part for producing a gap position command, a servo mechanism for driving the machining head to the reference gap position, a servo position deviation reading part for reading an amount of position deviation of the servo mechanism, a position gain calculation part for calculating a corrected position gain of the servo mechanism, based on the amount of position deviation of the servo mechanism and a position gain replacing part for replacing the position gain of the servo mechanism with the corrected position gain.
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 digital servor system can swiftly stop a moving object, having a small friction resistance to the motion, at the position where the object should stop, without vibration thereof. A velocity command generating device (3) calculates a velocity command (V.sub.cmd) based on the deviation value of a position fedback from a position command detected by a position deviation detecting device (2). A velocity deviation detecting device (5) calculates a deviation (E) of a velocity fedback from the velocity command (V.sub.cmd). A torque command generating device (6) calculates a torque command (T.sub.cmd) giving a delay processing to the deviation (E), and outputs the torque command (T.sub.cmd) to a motor driving means (7).