【摘要】 针对汽车转向盘角脉冲试验3种后处理方法的基本原理、算法特点和误差来源进行了分析。分析结果表明,与应用连续傅里叶变换数值解法和离散傅里叶变换法的计算结果相比,应用系统辨识方法获得的车辆系统频率特性更能逼真地反映车辆系统自身的频率特性,即系统辨识方法不仅能提升角脉冲试验的数据处理精度,同时也为今后以角阶跃试验替代角脉冲试验辨识获取车辆系统的频率特性提供了理论依据。更多还原

【Abstract】 The basic principle,algorithm features and error sources of the three post-process approaches on vehicle steering wheel angle pulse test were analyzed.The analysis results indicate that compared with the calculation result with continuous Fourier Transformation and the method of Discrete Fourier Transformation,the vehicle system frequency characteristic obtained with system identification approach can more vividly reflect vehicle system frequency characteristics,e.g.system identification method can not only improve data processing accuracy of the angle pulse data,but also provide theoretical foundation for angle step test to replace angle pulse test identification to obtain vehicle system frequency characteristic.更多还原