Keysight ESI SimulationX is a powerful, multi-domain system simulation software used to model and analyze the dynamic behavior of complex mechatronic systems. It allows engineers to simulate the interaction of various physical domains—including mechanical, hydraulic, pneumatic, electric, and control systems—in a single platform. Built upon the open Modelica standard, the software offers extensive, ready-to-use component libraries for rapid virtual prototyping. SimulationX helps identify and optimize system parameters early in the design phase, reducing the need for costly physical prototypes. It is widely applied across automotive, aerospace, heavy machinery, and energy industries to analyze full systems like electric vehicle drivetrains and fluid power systems.