Applications of SSE on electrified railway train operation simulation

Abstract

探讨了电气化铁路列车运行模拟中的关键问题,开发了一套可供模拟计算与方案评价的电气化铁路列车运行模拟系统,重点介绍了该系统的主体结构、计算流程与牵引供电计算的SSE算法设计。本文采用Intel处理器(PentiumⅢ,PentiumⅣ)提供的SSE(单指令多数据流扩展指令集)技术,在PC机上实现了牵引供电的并行计算,加快了计算速度,使列车运行模拟系统的整体计算速度提高了两倍左右。 This paper discusses the key issues about train operation simulation on electrified railways. A simulation system has been developed for computational simulation and scheme evaluation. As an emphasis, the paper introduces the system structure, flow chart and traction power supply model. The calculating of traction power supply is a CPU intensive work. The Intel architecture processors (Pentium Ⅲ, Pentium Ⅳ) introduces Streaming SIMD Extensions (SSE), that is an efficient execution model to accelerate the applications. The paper discusses the methods to accelerate the calculation of traction power supply. Main procedures have been redesigned by exploiting SIMD parallelism in the PC platform. Finally, the experimental results demonstrate that SSE can speed up the calculation of traction power supply. Compared with convention algorithm implementation, the parallel algorithm enhances performance about two times.