BERYLLIUM STABLE PLATFORMfor

INERTIAL NAVIGATION ANDGUIDANCE SYSTEMS

3/27/2015Don Blanchet3B Associates339-234-3544

ForReference

only

GOAL Compute the mechanical stiffness

of a candidate inertial platform design using finite element analysis

Loading is 20G steady state

Triad compensation can be estimated

Design – 14 inch Beryllium cube

Weight 70 lbs

Design cross section

FEA mesh – 10 node tetras

FEA mesh – 10 node tetras

Mechanical properties

Results deformation UX

Results deformation UY

Results deformation UZ

LoadDirection Y

Results summary

Platform axis Acceleration deflection, inches

X .0000008009

Y .0000039840

Z .0000003582

Footnote Automatic meshing compute time

approximately 20 Seconds

1974 manual meshing time 4 months

1974 Mainframe