Constant torque for turboprop

[Guest mgipson]

I need to model a constant torque system for a turboprop. It works by controlling the fuel flow to the engines to maintain a torque set through a dial on the panel.Can anyone who has done one of these give me a bit of advice on how to go about this? I need to develop a function that sets the throttle lever position based on current torque and required torque. Should I be looking at other values such as N1 as well?Thanks!Mark

[Guest Mathias]

Once again this would be something requiring a PID controller. Additionally though the problem here is that torque calculations as simulated by FS also use a controller like this, so you would have two PID controllers being forced to work together. This causes all sorts of strange issues like inter-controller oscillations.Maybe for starters play with the proportional part by working with the error set_torque - current_torqueand multiplied by a factor to move the throttle, just to see what happens.