Dual level - series vibration isolation system

FEA response simulatiion

09/23/17 rev A

Don Blanchet

3B Associates

dwb3298@verizon.net

Prepared for:

RF Electronics Assembly

Goals

Increase the noise isolation of the RF pwb subassembly.

Low cost solution.

Introduce in forward production as enhanced system electrical performance.

2 d.o.f. system 2 levels ofvibration isolationspring-mass-damper schematic

chassisboard

rigidBaseinput

Model – dip brazed aluminum chassis

4x8x10 inches

System Weight = 8 lbs

Rubber chassis Isolators

bolt

rubber

Main cover removed –sensitive RF components

RF pwb

Rubber grommetisolator

RF pwb

Responses: Y-axis input20 – 2000 hz ; sine sweep

135 hz

Responses: X-axis input20 – 2000 hz

65 hz

Responses: Z-axis input20 – 2000 hz

65 hz

2017