Block 4 - lecture 3

Question 1

why do P controllers need an offset?

Answer 1

they can’t adapt to changing loads

Question 2

Integral control mode?

Answer 2

essentially sums the error over time, creating a sort of memory

the corrections it makes have the differential of the error. big error = faster response

Question 3

What’s p(0)? (the term at the end of the integral equation outside the integral?)

Answer 3

the initial output

Question 4

Proportional-integral mode?

Answer 4

a combination of proportional control mode and integral control mode

The I part is dominant in steady-state and the P part is dominant when the error is large

Question 5

Main advantage of PI control?

Answer 5

ends up with 0 error and can adapt to new loads