CarSim computes vehicle-side responses, including vehicle, tire, road, and driver behavior, while Simulink runs the control algorithm. At each defined simulation time step, the two environments exchange signals so the controller can respond to simulated conditions and the virtual vehicle can reflect those commands. This coordinated loop supports repeatable evaluation before physical testing.
The time step sets the rhythm at which CarSim and Simulink exchange signals. Using a defined, consistent update interval makes the controller and vehicle model interact through an organized simulation sequence. That timing framework supports meaningful comparisons of steering, braking, suspension, or stability behavior across repeatable virtual experiments.
CarSim supplies the detailed virtual representation of vehicle dynamics, including tire, road, and driver responses. Simulink provides the environment in which engineers execute control algorithms. Keeping these responsibilities distinct allows a controller to be assessed against changing simulated vehicle behavior, rather than evaluated only as an isolated algorithm.
An engineering workflow begins by selecting the virtual vehicle and operating conditions represented in CarSim, then connecting the model to a Simulink control algorithm. Engineers run the coupled simulation at defined time steps and examine the resulting vehicle and system responses. Repeating the same virtual conditions supports structured comparisons between controller or design alternatives.
The workflow can be applied to steering, braking, suspension, and stability systems, as well as advanced driver-assistance systems. This virtual vehicle framework lets teams examine how these systems behave under repeatable operating conditions. Its breadth makes it useful during development, when engineers need to identify design issues before committing to physical road tests.
Because the workflow exercises control algorithms against a detailed virtual vehicle, it provides a way to assess system behavior before hardware-based testing. Engineers can use virtual experiments to analyze performance, expose design issues, and prepare for hardware-in-the-loop evaluation. This approach can reduce reliance on costly road tests during early development.