基于DSP的动车组车内噪声主动控制系统设计  

Interior noise of EMU active control system based on DSP

作　　者：邹侃平 伍川辉[1] 

机构地区：[1]西南交通大学机械工程学院,四川成都610031

出　　处：《铁道科学与工程学报》2016年第11期2256-2261,共6页Journal of Railway Science and Engineering

基　　金："十一五"国家科技支撑计划项目(2009BAG12A01)

摘　　要：随着高速铁路大规模开通,运行时噪声随着速度提高而增大,严重影响所在环境下人员的舒适性,因此有必要设计一种基于DSP的噪声主动控制系统。系统由DSP部分和音频部分组成:DSP部分以TMS320VC5509A为核心,扩展了SDRAM存储模块以和电源供电模块;音频部分以TLV320AIC23B为核心搭建语音输入输出模块。DSP和AIC23B采用I2C二线制主从式通信,DSP把AIC23B采集到的声音信号经过计算再返回AIC23B输出。同时通过上位机观察,降噪后声音幅值比降噪前幅值明显下降。实验证明:基于DSP的噪声主动控制系统能有效降低动车组车内噪声,在宽频降噪有待改善。Due to the massive use of high-speed railway, running noise increases with speed, seriously affectingthe comfort of the staff exposed to the operational environment. A DSP-based active noise control system was de-signed. The system consisted of the DSP part and the audio part. The DSP part took TMS320VC5509A as a core,expanding SDRAM memory modules and power supply modules. The audio part takes TLV320AIC23B as a core,building voice input and output modules. DSP used I2C for communication with AIC23B, which was two-wireand master-slave way. DSP calculated the input from AIC23B and returned the output, while observing the effectin real time via the PC. The noise amplitude decreased obviously after using the system. Experimental resultsshow that the DSP-based active noise control system can effectively reduce interior noise of EMU. Broadbandnoise reduction needs to be improved.

关 键 词：动车组 车内噪声 主动控制 DSP AIC23B 

分 类 号：TP216.2[自动化与计算机技术—检测技术与自动化装置]