Quote:
Originally Posted by jamesm
i agree with most of that. my main point of contention would be throttling down when the system detects it has reached target. it would be best to just return early and let it loop over, no need for unnecessary motor control (one of the most computationally expensive operations in the system), and it will result in oscillation in all cases.
of course when the system is armed a simple scaling of throttle percentage to motor speed is less than ideal as well, as we're not concerned with motor speed, we're concerned with boost. it should read map, then compare to a boost target referenced from rpm and throttle position. this is a far more flexible design, imho.
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I agree with James, you will not be able to control in closed loopback the motor speed vs pressure sensor. Like James said, your are better looking at motore speed vs fix map(open loopback).
That why they use blow off valve in turbo application, the actuator can not react fast enougth+compressor wheel can not change speed to fast(due to is weight).