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 |