摘要:
Example methods and apparatus to limit a change of a drive value in an electro-pneumatic controller are disclosed. A disclosed example method includes determining a slew limit of a controller based on noise in at least one of a control signal or a feedback signal, calculating a drive value based on the control signal and the feedback signal, and changing the calculated drive value if a difference between the drive value and a previous drive value is greater than the slew limit of the controller.
摘要:
Die Erfindung betrifft ein Regelungssystem zur Ansteuerung eines Aktors (8, 9), insbesondere eines Fluidzylinders oder eines fluidischen Muskels, mit einer speicherprogrammierbaren Steuerung (2), einem Signalübertragungssystem (3), einem Aktor (8, 9) und einem Sensor (10, 11), wobei das Signalübertragungssystem (3) mit der Steuerung (2) und dem Aktor (8, 9) elektrisch verbunden und für eine Signaltibertragung zwischen Steuerung (2) und Aktor (8, 9) ausgebildet ist, wobei der Sensor (10, 11) dem Aktor (8, 9) zur Ermittlung eines Betriebszustands und zur Bereitstellung eines Sensorsignals an die Steuerung (2) zugeordnet ist und wobei in der Steuerung (2) ein Regler zur Ansteuerung des Aktors (8, 9) anhand von Steuerbefehlen und den Sensorsignalen des Sensors (10, 11) ausgebildet ist, dadurch gekennzeichnet, dass der Regler einen Regelalgorithmus umfasst, der zur Kompensation von nichtlinearen Eigenschaften einer vom Aktor (10, 11) bestimmten Regelstrecke ausgebildet ist.
摘要:
A device and method for control of a moving member (15) of a solenoid having a coil (13), air gap (25) and moving member (15) over the entire range of the movement. A sensor (17) is used for sensing the instantaneous value of the flux density in the air gap (25), and is converted to a voltage proportional to the intensity of the value. The value is converted to a unipolar drive current. The preferred sensor (17) is a Hall effect semiconductor magnetic field sensor. The solenoid (10) may include a bias (23) restraining the moving member (15).
摘要:
A valve actuator control device adapted to control the position of a valve actuator by means of solenoid valves, in which if the actuator position deviates from a desired position, but remains within a predetermined distance from said desired position, the control device is adapted to only return the actuator to the desired position after a delay period, thereby to increase the life span of said solenoid valves.
摘要:
A plant control system provides an enhanced capability of compensation for disturbance that abruptly changes. A controller includes a disturbance predictor for calculating a predicted value of disturbance on the basis of a drag force of a release spring and an assisting force of a compensation spring that are predicted on the basis of a clutch stroke, an adaptive disturbance observer for calculating an estimated value of disturbance on the basis of the estimated value of disturbance, a voltage to be applied to a motor, and the clutch stroke, and a sliding mode controller, which determines the voltage to be applied to the motor by carrying out control for making the clutch stroke follow a clutch stroke target value by determining the voltage to be applied to the motor by sliding mode control on the basis of the clutch stroke, the predicted value of disturbance, and the estimated value of disturbance.
摘要:
The present invention discloses a machine-accessible medium having instructions stored thereon that, when executed, cause a machine to receive a control signal and a feedback signal as well as to calculate from the control signal and the feedback signal a drive value. Furthermore the medium calculates a slew limit based on at least one or more of the drive value, the feedback signal, the control signal, and a noise level of the feedback signal, whereby the slew limit can change according to the state of the drive value, the feedback signal, the control signal and/or the noise level. The method further determines if a difference between the drive value and a previous drive value is greater than the calculated slew limit of an electro-pneumatic controller; and changes the calculated drive value based on the slew limit.