Zaretto/fg-aircraft

F-14 Roll channel slow to centre from halfway.

Closed this issue · 2 comments

Megaf commented

Video showing the issue.
https://user-images.githubusercontent.com/6201512/124796518-29b0ee80-df49-11eb-8244-601019cb556c.mp4
roll_slow_centre

As you can see, approximately from halfway its travel, the roll control surfaces will basically come to a halt and then move very slowly.

Zaretto commented

I've spent a lot of time validating that the SAS system that I've implemented is correct based on the schematics in NASA TM-81833

I will revisit this when I get some spare time and maybe I'll find something wrong.

Zaretto commented

After investigation this is being caused by the normal alpha roll augmentation logic
image

(from https://i.imgur.com/3x7Sblj.png)

So it appears to be working as designed - i.e. it is the lead lag compensator that is causing this:

image