Page 307 - Control Theory in Biomedical Engineering

280 Control theory in biomedical engineering

Stride velocity
1.4

1.2
1

0.8

0.6
0.4

0.2
0
Mean SD a (DFA)

Human c_LT c_TLV c_TLVP c_VP
Fig. 11 Mean, SD, and DFA scaling exponents (α) for c_TL, c_TLV, c_TLVP, c_VP and
experimental data of human are exhibited.

Means, SD, and DFA scaling exponents (α) for stride position of four
control system models are plotted in Fig. 12. Only c_TLVP value of (α)
is like that of the experimental data. SD of all models are approximately sim-
ilar to human data except c_TL. All models’ value of (α) is more than 1, just
as in the experimental data.

Stride position
2.5
2
1.5

1
0.5

0
–0.5

–1
Mean SD a (DFA)

Human c_LT c_TLV c_TLVP c_VP
Fig. 12 Mean, SD, and DFA scaling exponents (α) for c_TL, c_TLV, c_TLVP, c_VP, and
experimental data of human for the position are shown.