Engineering Reference - Exlar

Thrust Calculations
Total Thrust Calculations
Terms and (units)
Variables
THRUST = Total linear force-lbf (N)
Ø
= Angle of inclination - deg...................... = ________
F friction
= Force from friction-lbf (N)
tacc
= Acceleration time - sec............................ = ________
F acc
= Acceleration force-lbf (N)
v
= Change in velocity - in/sec (m/s) ...... = ________
F gravity
= Force due to gravity-lbf (N)
µ = Coefficient of sliding friction................ = ________
F applied = Applied forces-lbf (N)
W L
= Weight of Load-lbm (kg)......................... = ________
386.4 = Acceleration of gravity - in/sec 2 (9.8 m/sec 2 )
F applied = Applied forces-lbf (N)................................ = ________
Thrust Calculation Equations
THRUST = [ F friction ] + [ F acceleration ] + F gravity + F applied
THRUST = [ W L x µ x cosø ] + [( W L /386.4) x (v / t acc )] + W L sinø + F applied
THRUST = [( )x( )x( )] + [( /386.4) x ( / )] + [( ) ( )] + ( )
THRUST = [ ] + [( ) x ( )] + [ ] + ( )
= _________________ lbf.
Calculate the thrust for each segment of the move profile. Use those values in calculations below.
Use the units from the above definitions.
Cubic Mean Load Calculations
3 3
3 F 1 S 1 + F 2 S 2 3 3
+ F 3 S 3 + F 4 S 4
S 1 + S 2 + S 3 + S 4
F 1 = ____________ S 1 = ____________ F 1 3 t 1 = ____________
F 2 = ____________ S 2 = ____________ F 2 3 t 2 = ____________
F 3 = ____________ S 3 = ____________ F 3 3 t 3 = ____________
F 4 = ____________ S 4 = ____________ F 4 3 t 4 = ____________
Move Profiles may have more or less than four components. Adjust your calculations accordingly.
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