Engine Speed controller Simulink

Hello,

I have been using Engine Speed PI Controller as an example, but I could not understand the equation given in Throttle Angle subsystem i.e. 2.821 - 0.05231*u + 0.10299*u*u - 0.00063*u*u*u

So is it possible to help me with this situation on what are these actual values which are considered above does specify it ?

Thank you for your support.

regards,

Vishal

Answer 1

[Ryan G]

The entire subsystem represents a calculation of the mass flow rate. You can find the equation on the Modeling Engine Timing page.

What you posted represents f(theta) and where u=theta. I haven't read the paper cited in the link above, but I would guess that equation was developed to fit test data based on the description.