Research Article
Design of a Personal Mobility Device for Elderly Users
Table 3
The parameters of EPMD propulsion power calculation.
| The propulsion power calculation parameter |
| Total mass (M) | 200 | kg | Mass factor (fm) | 1 | — | Acceleration (α) | 1 | m/s2 | Speed (V) | 2 | m/s | Coefficient of rolling resistance (Crr) | 0.012 | — | Gravity (g) | 9.8 | m/s2 | Air density (ρ) | 1.225 | kg/m3 | Vehicle frontal area (A) | 0.7475 | m2 | Aerodynamic drag coefficient (Cd) | 0.5 | — | Wind speed () | 0 | m/s | Road slope angle (θ) | 0 | deg. | Propulsion power (P) | 448.87 | W |
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