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ILS values in .cfg file

Messages
238
Country
unitedstates
I'm trying to fix both the ILS intercept and hold on an aircraft. On the intercept, the airplane waits until the GS passes below and then tries to catch it. It also overshoots the localizer a bit. As far as I know, these are the vars that control how the aircraft manages itself on the ILS. Can anybody explain what these variables do? E.g. how they work?

Thanks,
Gregg

nav_proportional_control
nav_integrator_control
nav_derivative_control
nav_integrator_boundary
nav_derivative_boundary
gs_proportional_control
gs_integrator_control
gs_derivative_control
gs_integrator_boundary
gs_derivative_boundary
 
Last edited:

Heretic

Resource contributor
Messages
6,830
Country
germany
You'll have to dive into PID controller theory a bit to understand the autoland system.

To make understanding my custom PID airspeed hold code easier, I've tried to give a rough explanation of each term used by the controller and how to tune it.
See here:
http://fsdeveloper.com/forum/threads/ap-speed-hold-pid-controller.437633/#post-762138

It should point you in the right direction.

There is always Wikipedia for more in-depth knowledge. And billions of books on the subject.


Note that the auto approach/-land is no magic fix for bad piloting. Localizers should be intercepted as early as possible and glideslopes need to be intercepted from below and when stabilized.
 
Messages
238
Country
unitedstates
You'll have to dive into PID controller theory a bit to understand the autoland system.

To make understanding my custom PID airspeed hold code easier, I've tried to give a rough explanation of each term used by the controller and how to tune it.
See here:
http://fsdeveloper.com/forum/threads/ap-speed-hold-pid-controller.437633/#post-762138

Can't say I know PID theory, but the link above was a good help. With that knowledge I was able to do some changes and, through trial and error, i got some improvements. Thanks for the help.
 
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