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Table 2 Model parameters

From: The relation between neuromechanical parameters and Ashworth score in stroke patients

Parameter Unit Description Initial Value Estimated Value (mean ± 1 s.d.)
m kg mass (ankle + footplate) 2 1.86 ± 0.42
b Ns/m viscosity coefficient 5 1.28 ± 1.08
k 1/m stiffness coefficient 100 26.4 ± 15.4
x 0 m muscle length shift 0 -0.0081 ± 0.0023
F 0 N muscle force shift -25 -21.2 ± 9.6
e 1 , e 2 , e 3 , e 4 N/Volts EMG weighting factors 10000 3.5 ± 1.05, 2.0 ± 0.96, 3.1 ± 0.77, 2.6 ± 1.1 (× 105)
f Hz activation cutoff frequency 1.5 1.28 ± 0.34
  1. Model parameters, initial values used for estimation and estimated values (mean and standard deviation of all conditions and subjects).