The acceleration waveform was input into the Simulink model
[21] and the voltage across the 1000 resistor was found. The measured
voltage and modeled voltage across the load are shown in
Fig. 12 for one participant while walking at 3 mph (4.8 km/h). To
estimate the damping force,the parasitic damping force magnitude
(Fd) was sweptin the modelto minimize the root mean square error
between the measured and modeled voltages. A plot of the RMS
error between measured and modeled voltages is shown in Fig. 13,
with the minimum RMS error at a damping of 0.0035 N.