Exercises Closed-loop Control

Exercises Closed-loop Control

The following exercises in the field of control engineering (fundamentals, controllers, and controlled systems) are of interest to technical college students, technicians, and practicing engineers.

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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 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.

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

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

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

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

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

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

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

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