Estimation of GM (1, 1) model parameter usually adopts the least square criterion, but test of model precision often USES average relative error criterion.
估计GM(1,1)模型中的参数通常采用最小二乘准则,而在模型精度检验时又常采用平均相对误差。
In a speed sensorless vector control system, the precision of speed estimation is relied on the precision of motor parameter.
在无速度传感器矢量控制系统中,转速估算的精度在很大程度上依赖于电机参数。
The parameter estimation achieved by this method is not unbiased. The precision of curve fitting is low.
但这种方法进行的参数估计不是无偏估计量,因此其非线性拟合精度较低。
应用推荐