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Originally Posted by r0nd3L
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I sorta figured that josh and its probably not your responsibility at all as the values you change don't affect the part that needs to change in order to correct this.
In the first graph shown. HPFP Actual first follows the requested nicely, the initial slopes are close not perfect, but close. However the % overshoot is also pretty bad, bc of this your settling time is then terrible and finally the ecu grabs control and plays nice. This could be from a bad second-order equation or the data rate at which the ecu is requesting or a delay in the actuator. Just think for 1,000 rpms the ecu doesn't have solid control over it. given that its a single second-order response, The damping ratio is to low. In the end its under damped while it should be critically dampened. Again Josh you probably have no control over this, and this is better then the boost control.
Now with the boost, the ecu is trying to to play catch up, at which then it over shoots. The % overshoot is better but not ideal. This one is most likely a second-order system that is again under-dampened. But then cant even meet the requirements. Towards the end we will assume that there aren't enough supporting mods to meet the required set point.
Both systems don't looked finished to be honest.
Here is a book that will help you fix this or better understand it.
http://www.amazon.com/Control-System...em+engineering