Update README.md

Author: Prabhu-369

README.md

@@ -1,10 +1,11 @@
-# Nonlinear-Dynamic-Inversion-algorithm-for-quadcopter
+# Controller-algorithm-for-quadcopter
+
+This section has PID controller, Nonlinear dynamic inversion controller based on euler angles and body rates are provided.
 
 Refer : Chapter3_NDI_quad.pdf for derivation
 
 Also refer : https://github.com/Prabhu-369/Quadcopter_6DOF_Matlab_files.git for 6dof dervation
 
-
 Usage: call main function in matlab and the simulation would run.
 
 The code is modularised, if needed anyone can make use of individual functions