= Currently: =
== RCG models ==
=== YEP ===
yep.mdl model is the Y End Test Mass model.

It calculates the force due to the coil inputs and the geometry of the moving suspension point relative to the test mass. It applies these forces to get the resulting position of the test mass, which is used to provide outputs for the OSEM sensors. The transfer functions and coupling constants need to be set through the MEDM matrices and Foton filter banks.

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== Simulink Models ==
=== yep_pitch_pos ===
This is a simple simulation of just the pos and pitch degrees of freedom, driven just by the x direction suspension point motion.

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= Useful pieces of information: =
Two useful documents by Seiji are [[attachment:T960040-00.pdf]] and [[attachment:T960158-00.pdf]]

The calibration for meters per counts can be found in: /cvs/cds/caltech/apps/mDV/extra/C1/calibratedDARMnoise/cal_sub/getDARMcal.m meters per count at '''941.54 Hz''' is:

cal.mcnt * cal.lambda / 2 / pi / cal.Cpp = 1.06e-6 * 1.064e-6 / 2 / 3.14 / 186 ='''9.65e-16 meters/count'''

where cal.Cpp is the MICH free swinging peak-to-peak counts

cal.mcnt is the PD1_Q/itmx_LSC_EXC at the calibration frequency (effectively power per excitation count)

cal.lambda is the frequency of the light (1064 nm)