基于双DSP-FPGA架构的城轨列车电力牵引控制系统

Dual DSPs-FPGA Structured Traction Control System for Urban Rail Transit Vehicle

牵引控制系统是城轨列车电力牵引系统的核心部件之一,是牵引系统强、弱电交互的中枢纽带。由于城轨列车控制系统接口丰富且逻辑算法复杂、通信任务繁重,简单的控制架构已不能满足要求,进而提出了一种基于双浮点数字信号处理器(Digital Signal Processor,DSP)和现场可编程门阵列(Field Programmable Gate Array,FPGA)的系统架构,充分利用DSP强大的数字信号处理能力和FPGA强大的高速并行处理能力。给出了基于任务类型的硬件架构和基于处理速率需求的软件架构设计模式,C/C++、高速硬件描述语言(Very High Speed Integrated Circuit Hardware Description Language,VHDL)及界面语言和相关支持软件用于实现所有牵引控制任务的调度管理和控制。在地铁和轻轨列车电力牵引系统上的成功运用,验证了提出的牵引控制系统架构的可行性和合理性。

As a critical tie between power and electronics of electric drive system for urban rail transit vehicle, traction control system is one of the most important equipment. Its characteristic of rich interfaces, complex logic and control algorithm, and onerous communication tasks, makes the simple control structure not suitable. A new control structure based on dual DSPs and FPGA is represented in this paper, which fully make use of the signal processing ability of DSPs and high speed parallel calculation ability of FPGA. The hardware and software structures are also given, as well as the debug software and languages of C/C＋＋, very high speed integrated circuit hardware description language（VHDL） and graphic languages, that completely finish the multi-task and multi-rate control. The real systems have been fixed on the traction systems of subway and light rail vehicles, and the perfect performances validate the feasibility and rationality.