Design, develop, and integrate virtual models representing both hardware and software behavior for active chassis systems such as Electronic Brake Control Module (EBCM), Electric Power Steering (EPS), Active Rear Steering (ARS), Semi‑Active Damping System (SADS), and others into co‑sim frameworks for Electric Vehicle (EV), Plug‑in Hybrid Electric Vehicle (PHEV), and Internal Combustion Engine (ICE) programs to enable vehicle dynamics performance and chassis controls software development, calibration, and validation. Develop and integrate multi‑body and 1‑D vehicle dynamics models including vehicle mass, aerodynamics, brake system, front and rear steering systems, front and rear suspension systems, tire models, propulsion systems, and sensor models such as the Inertial Measurement Unit (IMU) into Software‑in‑the‑Loop (SIL) and Hardware‑in‑the‑Loop (HIL) simulation platforms.