PPRuNe Forums - View Single Post - A320 Lateral Control NORMAL LAW
View Single Post
Old 1st August 2025 | 05:58
  #8 (permalink)  
Sim25
 
Joined: Feb 2023
Posts: 60
Likes: 13
From: Aachen
Originally Posted by Maverick2167
when PEDAL INPUT is sensed with wings level, the lateral normal law initiates/injects a bank angle opposite the the direction of YAW i.e. preventing induced roll? and any idea if this bank angle is initiated by the ailerons or spoilers?
Right rudder, yawing to the right, bank to the right, negative sideslip. Steady state (with no input on the stick) you'll end in a steady bank and steady sideslip. Which when you release the pedal becomes zero bank and zero side slip again (assuming you were flying wings level). This only makes sense if you accept that the normal law roll is implemented with an inner bank angle target loop, which some people don't and that's why I wrote "here we go again", not the first time discussing that...

Both spoilers and ailerons are used. If spoilers are also deflected depends on the magnitude of the "global deflection order" generated by the control loop of the law and then fed through the kinematics... They are a function of s/f so this will change...
Sim25 is offline  
Reply