Table 5 Design scenarios analysis
| Â | Â | Design scenarios options | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Â | Â | 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 | |