SBMD, Ball Modeling Bob Brown, BATC

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SBMD, Ball Modeling Bob Brown, BATC

• MSFC Technology DaysHuntsville, AL5/9/2001

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NASTRAN Surface Samplingversus SBMD Grid Pattern
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Measured versus PredictedGravity Deformation
Measured
Predicted
Predicted Zernikes
36-Term Fit Removed RMS 0.0083 µm
36-Term Fit Removed RMS 0.0088 µm
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Measured versus Predicted 6mm Radius of
Curvature Change
Measured
Predicted
Predicted Zernikes
36-Term Fit Removed RMS 0.0062 µm
36-Term Fit Removed RMS 0.0051 µm
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Cryogenic Deformation(on Bipod Mount)
Predicted
Predicted
Measured
Measured