taeyeon kim. page 2 1.vibration test plan for khu 2.harnessing 3.stein housing 4.future work

Final Summer Checkout

Taeyeon Kim

1. Vibration test plan for KHU

2. Harnessing

3. STEIN Housing

4. Future work

AGENDA

My Schedule on Summer vaca-tion

In UC Berkeley (Now~ 12th Aug.)

Harnessing, Modify STEIN Housing

In UC Berkeley (18th July~ Now)Modified 2D drawing, STEIN fit check, Har-

nessing

IN Kyung Hee University ( ~16th July)

Prepared the vibration test, a fixture design

At Kyung Hee University

Modal Analy-sis

Static Analy-sis by using

MAC

Responds Analysis

Vibration Test

Process of Vibration Test

Prove CINEMA is stable on a launcher

Get the natural frequency of CINEMA

Decided the point of an ac-celerometer on CINEMA

Random vibration testNOW

1st mode: 320 Hz

Stress mar-gin: 10%

Decided Ac-celerometer

points

Responds Analysis

<X axis> <Y axis>

<Z axis>

• Get a result of RMS value of Acceleration at the worst case

• Unit level is refer to GSFC-STD-7000

• Qualification Model will be take the Random vibra-tion test at SATREC ( Middle of October)

• We can help a vibration test if vibration test of the UHF antenna is delayed after middle of September.

Accelerometer & Plan

Primary

Secondary

Design of Fixture for KHU

UP Bottom

<Bottom of TestPOD>

<Fiixture>

At UC Berkeley

STEIN Flex Circuit Fit Check

• Assembled the digital board and STEIN parts (except At-tenuator)

• Fit check connecting wire and STEIN housing

• However, connector on the digital circuit is broken.

• Disassemble the STEIN as-sembly to repair the digital board

-Change the 3D modeling of STEIN Electronics Housing.

STEIN Flex Circuit

0.05 in

• Extended the wall of STEIN housing to consider the flex circuit.• Make a 2D drawing

Harnessing

• Work with • I made the MAGIC Harnessing wire.

• Wire is twisted at 100 times.

FUTURE WORK

• Harnessing in UC Berkeley

• STEIN fit check (if it is possible)

• Performed random vibration test in South Korea

• Assemble the CINEMA with KHU mechanical team

Thank youK y u n g H e e U n i v e r s i t y / S c h o o l o f S p a c e R e s e a r c h

taeyeon kim. page 2 1.vibration test plan for khu 2.harnessing 3.stein housing 4.future work

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