Nerd question for the coders.

[Rob52240]

I had my e6b open while flying bombers and wondered,

does autopilot utilize separate PID loops to self adjust the controls?

[Skuzzy]

What is a "PID" loop?

[Rob52240]

Proportional, Integral and Derivative

It's what most mechanical control systems run on.

Depending on how far from setpoint something is, it reacts proportionally, integral refers to how fast it reacts and nobody really uses the derivative but it determines how much to factor in past performance.



From wikipedia
The response of the controller can be described in terms of the responsiveness of the controller to an error, the degree to which the controller overshoots the setpoint and the degree of system oscillation.

[Skuzzy]

I am familiar with that, but I also know PID to mean;

Parent In Distress (its a parent thing)
Parent ID (its a server thing)
Poop Is Deep (do I need to explain?)
Premenstrual Indecision Disorder (ever been married?)

Now that we have that cleared up.

I have no idea how the EB6 works in the game.

[Rob52240]

Actually I was asking about the autopilot / combat trim but it's ok.  I'm no longer curious.

<S>

[Shamus]

 

[RTHolmes]

[what is the algorithm for the autopilot in AH?]

very unlikely HT is going to post the pseudocode for this, but nowhere near as complex as most industrial PID model controllers would be my guess, given its behaviour and the cycles needed for important aero stuff.

surely using more than one PID for a single process would result in them fighting each other?



(as a friend of the penguin my first thought was Process ID



edit: it could use a lil tweaking though - the 262's performance is way beyond what it can handle resulting in a sector's porpoising if you havent worked out how to finesse it. in other aircraft it would be good for noobs if it went level up to climb speed, then started climbing. I see new guys all the time lift, turn, get to 1000' then hit autoclimb and auger

[Peyton]

I am familiar with that, but I also know PID to mean;

Parent In Distress (its a parent thing)
Parent ID (its a server thing)
Poop Is Deep (do I need to explain?)
Premenstrual Indecision Disorder (ever been married?)

Now that we have that cleared up.

I have no idea how the EB6 works in the game.

you forgot Pelvic Inflamatory Disease

[amulford]

Really?  A PID?  At the very least you would need to go more on the lines of a PLC.  A multi channel PID doesn't do multi variable comparatives and sum them for multiple output response.  

[Rob52240]

3 PIDS could run the plane's control surfaces.

[JimmyD3]

Yeah throw a Low Signal Selector or High Signal Selector in there and you could Really have some fun. Woodward Governor use to use a Signal Buss on there multi channel 43027 systems ( back in the 80'S) 

[DaCoon]

I am familiar with that, but I also know PID to mean;

Parent In Distress (its a parent thing)
Parent ID (its a server thing)
Poop Is Deep (do I need to explain?)
Premenstrual Indecision Disorder (ever been married?)

Now that we have that cleared up.

I have no idea how the EB6 works in the game.

definately know 1,3,&4 real well.............
#1=

#2=

#3=

[kvuo75]

(as a friend of the penguin my first thought was Process ID

thats exactly what thought too.      I started with 1.2.13  

[titanic3]

Just hook up the warp drive with the matter defibrillator and anti matter drive and the whachamacallit and you're good to go.   

[hitech]

I had my e6b open while flying bombers and wondered,

does autopilot utilize separate PID loops to self adjust the controls?

I come from a control engineering back ground. Yes I use PID loops for a great many controls. And they are also called that, just a little piece of a pitch controller.


The constants are just normalizing the plane specific input into a unit that is close to 1 based for most planes.

   P = 2* Plane->PlaneModel.PlaneParams.TrimP[simpTI_ANGLE].Pitch * Scale / 2;
   I = 0.04 * Plane->PlaneModel.PlaneParams.TrimI[simpTI_ANGLE].Pitch * Scale;
   D = 0.1 * Plane->PlaneModel.PlaneParams.TrimD[simpTI_ANGLE].Pitch * Scale / 2;