Exercícios de engenharia de controle

Exercícios sobre engenharia de controle

Os exercícios a seguir, da área de controle de processos (noções básicas, controladores e sistemas controlados), são de interesse para futuros profissionais qualificados, técnicos e engenheiros em formação.

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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: 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

 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

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Which statement about an On-Off Control is correct?

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

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