So far we've got two models: a simple cruise controller and a beautiful car. Until now, they've been treated separately in an open loop. Remembering what we learned in the previous chapter, we're going to place the required blocks and connect them in a closed loop.
Let's open both the models and copy them to a new model named cruise_control_sim.slx. If their workspaces aren't loaded automatically, load them by dragging them from their folders to the MATLAB's Command Window and save the new workspace as cruise_control_sim.mat. It's suggested to have the new workspace loaded automatically via the PreLoadFcn model callback as we have learned in the previous chapter.
In order to see what's happening inside the engine, let's pull out the Gear and RPM signals from Alfa Romeo 147 GTA | Engine force | Gearbox and differential until we reach the root block, by adding and connecting the output ports to every parent subsystem.
Then we need to make the important connections...
