Exercises Closed-loop Control - Learnchannel-TV.com

Which statement about an On-Off Control is correct?

The smaller the switching hysteresis of the control device, the higher the fluctuation of the controlled variable and the smaller the switching frequency.

The switching frequency increases with the switching hysteresis of the controller.

The smaller the switching hysteresis of the control device, the smaller the fluctuation of the controlled variable and the higher the switching frequency.

The bigger the switching hysteresis of the controller, the lower the fluctuation of the controlled variable and the smaller the switching frequency.

The fluctuation of the controlled variable is independent of the switching hysteresis – it only depends on the setpoint value.

Shown below is the control behavior of a level control when using three different controller types. Which statement is correct?

Closed-Loop Control – Control behaviour with different controller types

Figure A: Binary controller, Figure B: P controller, Figure C: PID controller

Figure A: P-controller, Figure B: 3-Point controller, Figure C: PI controller

Figure a: P controller, Figure b: Analog controller, Figure c: PI controller

Figure A: P-controller, Figure B: On-Off controller, Figure C: PI controller

Figure a: On-Off controller, Figure b: P controller, Figure c: PI controller