Analysis of muscle viscoelasticity in human motion control using system identification of multi channel and multi axis mechanomyogram

电刺激腓总神经，诱发胫前肌收缩。用激光位移计和附着在皮肤上的加速度传感器测量机械肌电图。以电刺激为输入，肌力图为输出的系统，用五阶或六阶模型进行辨识。系统的固有频率与肌肉和皮下脂肪弹性引起的频率一致。揭示了刺激强度/频率与粘弹性的关系。

The common peroneal nerve was electrically stimulated and muscle contraction of the tibialis anterior muscle was induced. The mechanomyogram was measured with a laser displacement meter and an acceleration sensor attached on the skin. The system, of which input was electrical stimulation and the output was mechanomyogram, was identified with the fifth-or sixth-order model. The natural frequencies of the system agreed with those originated from the elasticity of the muscle and subcutaneous fat. The relationship between stimulation strength/frequency and viscoelasticity was revealed.