When stowed
During deployment
Fully deployed
FU LL Y
DEPLOYED
Fx = K ((Lmax- Lmin) +dmin) os max
=0 {max = 90
Fx = K ((Lmax Li) +dmin) cos O i
Fx= K (dmin) cos min
FU IN STOED
FU I IY STO WED
SPRING FREE LENGTH
Figure 2-11. Length of the strut when fully deployed, stowed and free length of spring
As shown in Figure 2-11, Lmax, Li, and Lmin are the lengths of the struts at various
positions. dmin is the difference between the free length of the spring and minimum
length of the strut (the amount that the spring is compressed when the strut is fully
deployed) and 0 max, 0 i, and 0 mi are the angles of the strut at various positions.
At any instant of time the distance traveled by the angular columns and plates (Xi)
is not equal to the deflection of the spring and the springs are always at an angle with
(2.1)
(2.2)
(2.3)