Text this: Velocity and trajectory tracking control model for underactuated UUVs through coupling of direct CFD and PID control algorithm

  _____      ___     _    _    _    _    _    _   
 /  ___||   / _ \\  | \  / || | || | || | |  | || 
| // __    / //\ \\ |  \/  || | || | || | |/\| || 
| \\_\ || |  ___  ||| .  . || | \\_/ || |  /\  || 
 \____//  |_||  |_|||_|\/|_||  \____//  |_// \_|| 
  `---`   `-`   `-` `-`  `-`    `---`   `-`   `-`