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. 2023 Jul 7;11:1188685. doi: 10.3389/fbioe.2023.1188685

FIGURE 2.

FIGURE 2

Clusters classification for the main mechanical configuration of passive and quasi-passive AAFOs. The working principle and main pros and cons are given for: (A) continuous adjustable dynamic response AAFO; (B) Spring-cam AAFO; (C) clutch-dependent AAFO; (D) Electrically-controlled clutch dependent AAFO.