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用ARMA模型研究了正常人体肘关节主动肌和拮抗肌表面肌电信号(SEMG)的模型参数、功率谱中的峰值频率F_m和对应于发放率的突起峰F_p,它们与以前研究得到的中值频率具有类似的变化趋势:重复收缩时SEMG信号的归一化中值频率NMF的初始值随重复次数的增加而下降,而NMF的下降速度随重复次数的增加而增加。
The ARMA model was used to study the model parameters of SEMG, the peak frequency F_m in the power spectrum and the peak F_p corresponding to the rate of release, which were close to those obtained from the previous study The frequency has a similar trend: the initial value of the normalized median frequency NMF of SEMG signal decreases with the increase of the number of repetitions while the rate of decline of NMF increases with the increase of the number of repetitions.