- #1
OZwurld
- 7
- 0
Hello,
Example vehicle design criteria:
▪ Gross vehicle weight (GVW): 190kg*9.81 = 1863.9N
▪ Weight on each drive wheel (WW): 1.84kg *9.81 = 18N
▪ Radius of wheel/tire (Rw): 216mm
____________________________________________________
▪ Desired top speed (Vmax): ?
▪ Desired acceleration time (ta): ?
____________________________________________________
▪ Maximum incline angle (α): 2 degree
▪ Worst working surface: concrete (good)
TTE [N] = RR[N] + GR[N] + FA[N]
Where:
TTE = total tractive effort [N]
RR = force necessary to overcome rolling resistance [N]
GR = force required to climb a grade [N]
FA = force required to accelerate to final velocity [N]
->> what value of t do i use , do i also just pick a value that suits me like i did with the velocity?
___________________________________________________________
TTE = (16.72+1393*sind(2)+((1393*10)./(9.81*t)))
___________________________________________________________
Thanks..![Smile :smile: :smile:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Example vehicle design criteria:
▪ Gross vehicle weight (GVW): 190kg*9.81 = 1863.9N
▪ Weight on each drive wheel (WW): 1.84kg *9.81 = 18N
▪ Radius of wheel/tire (Rw): 216mm
____________________________________________________
▪ Desired top speed (Vmax): ?
▪ Desired acceleration time (ta): ?
____________________________________________________
▪ Maximum incline angle (α): 2 degree
▪ Worst working surface: concrete (good)
TTE [N] = RR[N] + GR[N] + FA[N]
Where:
TTE = total tractive effort [N]
RR = force necessary to overcome rolling resistance [N]
GR = force required to climb a grade [N]
FA = force required to accelerate to final velocity [N]
->> what value of t do i use , do i also just pick a value that suits me like i did with the velocity?
___________________________________________________________
TTE = (16.72+1393*sind(2)+((1393*10)./(9.81*t)))
___________________________________________________________
Thanks..