With Monte Carlo simulation,this paper analyzes the SGED conditional distribution on the error term and the critical values and size distortion on ADF unit root test of time series with autoregressive conditional heteroscedasticity.
通过随机模拟的方式,分析了条件分布为有偏广义误差分布(SGED)以及具有自回归条件异方差误差的时间序列的ADF单位根检验的临界值和实际显著性水平的扭曲情况。
In general condition,it should be allowed that eccentric error is larger than ±10% of average air-gap,but over-large eccentric value can produce very much unbalanced magnetic pull,and then increase the deflection of motor shaft,thus critical speed is influenced.
在一般情况下,气隙偏心误差不超过气隙平均值的上下10%是允许的,但过大的偏心值会产生很大的单边磁拉力,导致电机转轴挠度的增加,进而影响电机的临界转速,但许多电机设计人员在计算电机转轴的挠度时,往往忽略单边磁拉力对于挠度的影响,为此,介绍了单边磁拉力产生的原因及对电机转轴挠度影响的计算过程。