摘要
以ARMAX模型作为系统模型,利用增广最小二乘法对模型的输入、输出及噪声项系数进行估计,再利用欧拉变换得出汽车转向盘转角脉冲输入试验的频域特性曲线。根据某款轿车的3次角脉冲试验数据,将ARMAX模型参数估计法与傅立叶变换处理方法进行比较。结果表明,ARMAX参数估计方法处理的系统频率特性曲线更平滑,参数一致性更好,更逼近实际值。
With the ARMAX model as the system model,the extended least square method（ELS） is utilized to estimate the input,output and noise coefficient of ARMAX model.The frequency domain characteristics curve of automobile steering wheel angle pulse input test can be obtained by applying Euler formula.Then comparison is made between ARMAX Model Parameter Estimation and Fourier Transformation（FT） based on three pulse test data of a car.The results show that the system frequency characteristics curve from ARMAX Model Parameter Estimation is more smooth and more consistent,and also more realistic than those from FT.
出处
《汽车技术》
北大核心
2011年第6期51-53,共3页
Automobile Technology
