MTS Series 215 Rotary Actuator - Manual (Page 48)

Series 215 Rotary Actuator Product Manual 48
Test Setup Using Standard Flexures
Operation
Calculate angle of flex Calculate the angle of flex (q) imposed on foot mounting and reaction bracket
flexures by using the following formula:
Compare angular
deflection
Compare the maximum horizontal angular deflection of the standard flexures
value (K = qF1= 0.006 rad.) with the calculated angle of flex imposed on foot
mounting and reaction bracket flexures (q=0.000107 rad.) to determine if the
flexures are adequate.
θ < θ
F 1
In the case of the sample calculation, the flexures are adequate. If the flexures are
not adequate, additional flexural capability is required or base plate stiffness
must be increased. Consult MTS Systems for assistance.
Calculate lateral
stiffness
Calculate the lateral stiffness (k F 1
) of the foot mounting and reaction bracket
flexures by using the following formula: