Calculating Required Damping Rates - English units Calculator

 

ENGLISH UNITS
Given quantity and unit

F lbf = force of weight on end of lever

L in = effective length of lever

d in = distance moved by end of lever

t s = time taken to move this distance

w rad/s = speed of rotation

T lbf.ins = torque applied to shaft

M lbf = mass

V in/s = velocity of mass

f Hz = frequency of vibration

CONVERSION FACTORS 
1 rad = 57.3°     1 RPM = 0.1047 rad/s     1 lbf.ins = 0.113 Nm
1 Nm = 8.85 lbf.ins    1 lbf = 4.45 N           9.81N = 1 kgf = 1 kp

1. Steady movement in a straight line.

Required rate:=(FL²t)/d lbf.ins/rad/s

F lbf
L in
t s
d in
Rate Is : lbf.ins/rad/s

2. Steady rotation.

Required rate:=T/w lbf.ins/rad/s
T lbf.ins
w rad/s
 
Rate Is : lbf.ins/rad/s

 

   

3. Deceleration of mass moving in a straight line.

Required rate: =(MVL²)/386d lbf.ins/rad/s
M lbf
V in/s
L in
d in
 
Rate Is : lbf.ins/rad/s
   

4. Critical damping of vibrating mass.

Required rate: =(MfL²)/30.7 lbf.ins/rad/s
M lbf
f Hz
L in
 
Rate Is : lbf.ins/rad/s

 
  
©KINETROL Ltd