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/s^2
Speed (V)	2	m/s
Coefficient of rolling resistance (Crr)	0.012	—
Gravity (g)	9.8	m/s^2
Air density (ρ)	1.225	kg/m^3
Vehicle frontal area (A)	0.7475	m^2
Aerodynamic drag coefficient (Cd)	0.5	—
Wind speed ()	0	m/s
Road slope angle (θ)	0	deg.
Propulsion power (P)	448.87	W