Skip to main content

Table 5 Design scenarios analysis

From: Harvesting biomechanical energy or carrying batteries? An evaluation method based on a comparison of metabolic power

   Design scenarios options
   Scenario A Scenario B Scenario C Scenario D Scenario E Scenario F Scenario G Scenario H Scenario I Current devices
Scenario description Specific energy 7.2*105 10.8*105 (50% better than current batteries) 7.2*105
(similar to current available batteries)
Device mass Low High Low High Device specifications are based on published data
Power output Low High Low High
Ankle device Device mass 0.1 0.2 0.2 0.1 0.3 0.5 0.5 0.1 0.5 0.86
COH 0 0 −1 −1 0 −1 0 −1 −1 0.7
Power output 4 4 4 3 15 10 15 3 10 6
Walking time (results) 34 68 21 0 27 22 45 0 33 224
Knee device Device mass 0.1 0.2 0.2 0.1 0.3 0.5 0.5 0.1 0.5 0.75
COH 0 0 −1 −1 0 −1 0 −1 −1 0.7
Power output 4 4 4 3 15 10 15 3 10 12
Walking time (results) 27 54 7 0 22 7 36 0 11 98
Backpack device Device mass 0.1 0.2 0.2 0.1 0.3 0.5 0.5 0.1 0.5 1
COH 0 0 1 1 1 0 0 0 0 4.8
Power output 4 4 4 4 15 10 15 4 10 2
Walking time (results) 5 10 44 39 37 10 7 7 37 260