As the core transportation tool of high-speed railroad, the design, and
optimization of EMU is the current research hotspot. This paper aiming to
improve design efficiency, optimize performance parameters. From the perspective
of vehicle level, based on the requirements and operation scenarios of the whole
vehicle, according to the RFLP method, combined with the SysML and M-design, we
conduct the vehicle requirements analysis, functional decomposition,
architecture analysis, whole vehicle index system establishment, and the
auxiliary power supply(APU) system is calculated by the parameters, the battery
design is optimized by PSO. The results show that integrated modeling makes the
interface between systems clearer and improves the model reuse rate; the
performance design and parameter optimization quantify the modeling indicators,
the system energy consumption is lowered, and the closed-loop verification of
requirements is realized, which is of some value to the refined design of other
systems.