As per my understanding, you are modelling a car using Simulink that contains three main subsystems, a “Vehicle” subsystem, a “Driver” subsystem and a “Skidpad” subsystem for reference and testing.
To connect all the outputs from the “Driver” subsystem to the “Vehicle” subsystem, it is a good practice to use “Bus Creator” and “Bus Selector” block pairs as it makes managing multiple signals easy and efficient. It also enhances the system modularity making it easier to debug issues.
Refer to the following MathWorks documentation link for information on the usage of “Bus Selector” and “Bus Creator” blocks:
- https://www.mathworks.com/help/simulink/slref/buscreator.html
- https://www.mathworks.com/help/simulink/slref/busselector.html
After executing the model, I could trace back the issue to “xdot” output signal in the “Vehicle Body 3DOF” block of the “Vehicle” subsystem. When traced back further, the Wheel Velocity signal, “WHlVz”, was not connected in the “Independent Suspension - Double Wishbone” block, as highlighted in the attached image. To connect this signal from to appropriate ports from the “Driver” subsystem, refer to the following MathWorks documentation links of these blocks:
- https://www.mathworks.com/help/vdynblks/ref/independentsuspensiondoublewishbone.html
- https://www.mathworks.com/help/vdynblks/ref/vehiclebody3dof.html
Hope this is beneficial!
