Updated README for cpp implementation.

README.md

@@ -2,24 +2,58 @@
 RBF Neural Net Adaptive PID Controller
 
 Implementations of a radial basis function (RBF) neural network adaptive PID controller. Uses 
-neural net and error information from PID control to adapt the control signal. Provides one 
+neural net and error information from PID control to adapt the control signal. 
-adaptation value, using error, integral, and derivative. 
 
-To adapt the PID gains themselves, network outputs must be made to 3 neurons. Example usage 
+### Python Implementation
-with simulated data can be found in [first_order_sim.py](first_order_sim.py)
+Developed to provide one adaptation value to the control signal 
+using the error, integral, and derivative terms. Done in `TensorFlow` and `Numpy`.
+To adapt the PID gains instead of the control signal in TF, the network outputs 
+must be made to 3 neurons and added to the gains. In Numpy, the gains will need to
+be added to inputs and the adapted signal added to the gains. 
 
-The method has been implemented in three ways: 
+Example usage with simulated data can be found in [first_order_sim.py](first_order_sim.py). Tests
+to be added. 
+
+### C++ Implementation
+A hybrid method; uses the error and PID gains (Kp, Ki, and Kd) to adapt the control signal. 
+This gives more flexibility to the control model as the gains can be easily adapted since 
+the RBF model already learns from them. The dual inputs should provide greater stability to
+the system, but will be more sensitive to the gains.
+
+The C++ implementation can already be used for any adaptation, adding the result of `predict()` to
+whatever values are desired to adapt. Uses just the `cmath` and `cstdlib` libraries with memory 
+management handled manually as the system it was designed for could not import additional libraries. 
+`cstdlib` can be removed if you don't care about random initialization of the centers. 
+
+Example usage with simulated data can be found in [main.cpp](/CPP_Implementation/main.cpp). 
+It includes some additional libraries in order to show an example usage with a simple first 
+order simulation.
+
+The project doesn't currently implement a CMake build as it was pulled from a greater build implementation.\
+An example manual compilation:
+```
+g++ -std=c++20 -o rbf_model_test rbf_model.cpp rbf_model_test.cpp -lgtest -lgtest_main -pthread -g -Wall
+g++ -std=c++20 -o apid_controller_test apid_controller.cpp apid_controller_test.cpp -lgtest -lgtest_main -pthread -g -Wall
+
+./apid_controller_test
+./rbf_model_test
+
+g++ -std=c++20 -o control_system main.cpp apid_controller.cpp rbf_model.cpp -lgtest -lgtest_main -pthread -g -Wall
+./control_system
+```
+
+Simulation examples from the three implementations: 
 
 1. [TF_Implementation](/TF_Implementation/): Using TensorFlow to build and train the RBF Model.
 
 ![TensorFlow](images/tf_impl.png "TensorFlow")
-![TF_Trained](images/trained.png "TF_Trained")
+![TF_Trained](images/tf_impl_trained.png "TF_Trained")
 
 2. [NP_Implementation](/NP_Implementation/): Using Numpy to build and train the RBF Model.
 
 ![Numpy](images/nump_impl.png "Numpy")
 
-3. [CPP_Implementation](/CPP_Implementation/): Written in C++ (requiring `cmath`), for use on embedded systems.
+3. [CPP_Implementation](/CPP_Implementation/): Using C++ for embedded systems to build and train the RBF Model. 
 
-To build executable: `g++ RBF_aPID.cpp -o RBF_aPID.exe`\
+![CPP](images/cpp_impl.png "CPP")
-To run: `./RBF_aPID.exe`
+![CPP_Trained](images/cpp_impl_trained.png "CPP_Trained")