Load Disturbances

Question 1

What is the criteria for using a feedforward control strategy?

Answer 1

A load disturbance on the CV that is unacceptable but also measurable

Question 2

What are the 3 steps to implementing feedforward control?

Answer 2

1) Measure the load disturbance
2) Build a model of the load disturbance relative to the CV like a transfer function, energy, or mass balance
3) Implement feedback trim so the CV can be measured and controlled

Question 3

If the load disturbance is unacceptable and unmeasurable what can be done to resolve the issue?

Answer 3

Gain scheduling/adaptive gain control

Question 4

What is the advantage of Feedforward system with feedback trim?

Answer 4

1) Helps deal with unmeasured load disturbances
2) Helps deal with model degradation overtime

Question 5

What is the disadvantage to feedforward control with feedback trim?

Answer 5

Model has to be accurate

Question 6

In dynamic FF control, the T1L should be __________ than T1P.

Answer 6

more

Question 7

T/F Static FF models are used when processes are extremely fast and dynamics are negligible

Answer 7

True