新能源汽车路噪主动控制优化研究

Research on Active Road Noise Control Optimization of New Energy Vehicles

针对新能源汽车路噪主动噪声控制(road noise active noise control,RANC)系统由于车身结构与路面粗糙度的相互影响而导致稳定性差、控制效果较差等问题,提出了新能源汽车RANC系统的优化方法。该优化方法首先提出了利用工况传递路径分析方法(operational transfer path analysis,OTPA)对车内噪声进行传递路径识别和声源贡献量分析,其次对适用于有源噪声控制中的FXLMS(filter-X least mean square,FXLMS)算法进行优化改进。通过Matlab/Simulink对新能源汽车RANC系统进行仿真分析,并与实车试验进行对比。验证结果表明,对控制系统的优化改进,有效提高了新能源汽车RANC系统的控制效果,为后续汽车主动噪声控制领域奠定了基础。

Aiming at the problems of poor stability and poor control effect of road noise active noise control(RANC)of New Energy Vehicles due to the interaction between vehicle body structure and road surface roughness,an optimization method of RANC system for new energy vehicles was proposed.In this optimization method,the transmission path identification and source contribution analysis of the interior noise were firstly proposed by using the operating mode transfer path analysis(OTPA),and then the FXLMS algorithm which was suitable for active noise control was optimized and improved.The RANC system of new energy vehicles was simulated and analyzed by Matlab/Simulink,and compared with the real vehicle test.The verification results show that the optimization and improvement of the control system can effectively improve the control effect of RANC system of new energy vehicles,and lay a foundation for the future automotive active noise control field.