LIGO Document T1000458-v6

Fitting the Quad Noise Prototype Model to Measured Data

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T - Technical notes
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This paper summarizes the work done to fit the quad noise prototype Mathematica model to the measured data.

The Matlab model files are included here in the zip file. To run the model download all the .m files to the same directory and run ssmake4pv2eMB5f. This gives you the raw model and model data.

Running quad_run instead of ssmake4pv2eMB5f will give you the model, mode shapes and frequencies, and plot some of the transfer functions. It also has instructions on how the model is used commented into the top of the file.

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Notes and Changes:
Added an appendix deriving the influence of the new 'h' parameters on the inertia matrix. The 'h' parameters represent horizontal offsets of the center of mass at each stage.
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