Method ao/ltp_ifo2acc


  LTP_IFO2ACC convert ifo data to acceleration
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  DESCRIPTION: LTP_IFO2ACC converts interferometer data to acceleration
 
 
  CALL:                 bs = ltp_ifo2acc(o1,od,pl);
                        [a1,ad] = ltp_ifo2acc(o1,od,pl);
  
 
  INPUTS:      
        - o1, channel 1 interferometer output
        - od, differential channel interferometer output
        - pl, plist containing parameters
               
  OUTPUTS:     
        - a1, Force per unit of mass on TM1 in the spacecraft reference
        frame
        - ad, Differential force per unit of mass between TMs
  
  Parameters Description
 
  REFERENCES:
 
  VERSION:     $Id: ltp_ifo2acc.m,v 1.13 2012/03/21 13:37:06 luigi Exp $
  
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Method Details
Access public
Defining Class ao
Sealed 0
Static 0

Parameter Description

MDC1

no description
Key Default Value Options Description
VERSION 'LSS v4.9.2'
  • 'MDC1'
  • 'LSS v4.9.2'
Controller version

W1 -1.3e-06 none The parasitic stiffness per unit of mass on TM1 (s^-2)

W2 -1.9999999999999999e-06 none The parasitic stiffness per unit of mass on TM2 (s^-2)

METHOD 'PARFIT'
  • 'PARFIT'
  • 'SERIES'
The method that must be used for calculating derivatives.
M1 1.96 none Test Mass 1 mass (kg)

M2 1.96 none Test Mass 2 mass (kg)

MSC 422.69999999999999 none Spacecraft mass (kg)

GAMMAX 4.9220000000000002e-09 none Gravitational gradient between TMs along x

X1_0 0 none Data offset for x1 (position of TM1 relative to the spacecraft) (m).
Input a cdata ao with the proper units or a number.
XD_0 0 none Data offset for xd (position of TM1 relative to the spacecraft) (m).
Input a cdata ao with the proper units or a number.
S11 1 none Calibration of IFO CH1

S1D 0 none Cross-talk diff channel to channel 1

SD1 0.0001 none Cross-talk channel 1 to diff channel

SDD 1 none Calibration of IFO diff channel

INVS_1 -1 none Inverse interferometer model for the first channel.
It is a model converting output ifo channels o1, oD in the physical TM1 displacement rerlative to the spacecraft x1.
You can choose between 3 options:
  • -1, Uses the default builtin model ao_model_invS_1.
  • 0, calculation for IFO1 will be skipped, i.e. x1 = o1.
  • Input model, input your own model. It can be an ao, in the last case x1 is set to the input value.Note. Calibration parameters S11, S1D, SD1 and SDD are used only for the case -1
INVS_DELTA -1 none Inverse interferometer model for the differential channel.
It is a model converting output ifo channels o1, oD in the physical TMs relative displacement xD.
You can choose between 3 options:
  • -1, Uses the default builtin model ao_model_invS_Delta.
  • 0, calculation for IFOD will be skipped, i.e. xD = oD.
  • Input model, input your own model. It can be an ao, in the last case xD is set to the input value.Note. Calibration parameters S11, S1D, SD1 and SDD are used only for the case -1
FREEDYN_1 -1 none Free Dynamics model for the first channel.
You can choose between 3 options:
  • -1, Uses the default builtin model ().
  • 0, calculation with D will be skipped, afd1 = 0.
  • Input model, input your own model. It can be a an ao, in the last case afd1 is set to the input value.Note. Calibration parameters w1, w2, m1, m2, msc, Gammax are used only for the case -1
FREEDYN_DELTA -1 none Free Dynamics model for the differential channel.
You can choose between 3 options:
  • -1, Uses the default builtin model ().
  • 0, calculation with D will be skipped.
  • Input model, input your own model, afdD = 0. It can be an ao, in the last case afdD is set to the input value.Note. Calibration parameters w1, w2, m1, m2, msc, Gammax are used only for the case -1
HDF -1 none Drag-free controller model.
You can choose between 3 options:
  • -1, Uses the default builtin model ().
  • 0, calculation with Hdf will be skipped, acom1 = 0.
  • Input model, input your own model.It can be a miir, mfir, pzmodel, smodel or an ao with the commanded force
HSUS -1 none Electrostatic suspension controller model.
You can choose between 3 options:
  • -1, Uses the default builtin model ().
  • 0, calculation with Hsus will be skipped, acomD = 0.
  • Input model, input your own model.It can be a miir, mfir, pzmodel, smodel or an ao with the commanded force
ADF -1 none Thrusters actuation model.
You can choose between 3 options:
  • -1, Uses the default builtin model ().
  • 0, calculation with Adf will be skipped, ac1 = acom1.
  • Input model, input your own model.It can be a miir, mfir, pzmodel, smodel
ASUS -1 none Electrostatic actuation model.
You can choose between 3 options:
  • -1, Uses the default builtin model ().
  • 0, calculation with Asus will be skipped, acD = acomD;
  • Input model, input your own model.It can be a miir, mfir, pzmodel, smodel
SUBTRACTDELTASTIFFNESS 1
  • 1
  • 0
Decide to remove or keep the force noise term on the differential channel arising from the stiffness unbalance.
You can choose between 2 options:
  • true, decide to subtract the term from the differental force per unit of mass.
  • false, decide to keep the term in the differential force per unit of mass.
FS 10 none sampling frequency

THRUSTERS RESPONSE TIME 0.10000000000000001 none time constant of the actuation

THRUSTERS BUS DELAY 0.315 none delay from commanded force to actuation system

GDF 1 none thrusters actuation gain

TOL 9.9999999999999995e-08 none defines the limit for the magnitude of the filter coefficints tobe considered relevant for discretization

SUSPENSION RESPONSE TIME 0.01 none time constant of the actuation

SUSPENSION BUS DELAY 0.30499999999999999 none delay from commanded force to actuation system

GSUS 1 none suspension actuation gain

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LSS v4.9.2

no description
Key Default Value Options Description
VERSION 'LSS v4.9.2'
  • 'MDC1'
  • 'LSS v4.9.2'
Controller version

W1 -1.3e-06 none The parasitic stiffness per unit of mass on TM1 (s^-2)

W2 -1.9999999999999999e-06 none The parasitic stiffness per unit of mass on TM2 (s^-2)

METHOD 'PARFIT'
  • 'PARFIT'
  • 'SERIES'
The method that must be used for calculating derivatives.
M1 1.96 none Test Mass 1 mass (kg)

M2 1.96 none Test Mass 2 mass (kg)

MSC 422.69999999999999 none Spacecraft mass (kg)

GAMMAX 4.9220000000000002e-09 none Gravitational gradient between TMs along x

X1_0 0 none Data offset for x1 (position of TM1 relative to the spacecraft) (m).
Input a cdata ao with the proper units or a number.
XD_0 0 none Data offset for xd (position of TM1 relative to the spacecraft) (m).
Input a cdata ao with the proper units or a number.
S11 1 none Calibration of IFO CH1

S1D 0 none Cross-talk diff channel to channel 1

SD1 0.0001 none Cross-talk channel 1 to diff channel

SDD 1 none Calibration of IFO diff channel

INVS_1 -1 none Inverse interferometer model for the first channel.
It is a model converting output ifo channels o1, oD in the physical TM1 displacement rerlative to the spacecraft x1.
You can choose between 3 options:
  • -1, Uses the default builtin model ao_model_invS_1.
  • 0, calculation for IFO1 will be skipped, i.e. x1 = o1.
  • Input model, input your own model. It can be an ao, in the last case x1 is set to the input value.Note. Calibration parameters S11, S1D, SD1 and SDD are used only for the case -1
INVS_DELTA -1 none Inverse interferometer model for the differential channel.
It is a model converting output ifo channels o1, oD in the physical TMs relative displacement xD.
You can choose between 3 options:
  • -1, Uses the default builtin model ao_model_invS_Delta.
  • 0, calculation for IFOD will be skipped, i.e. xD = oD.
  • Input model, input your own model. It can be an ao, in the last case xD is set to the input value.Note. Calibration parameters S11, S1D, SD1 and SDD are used only for the case -1
FREEDYN_1 -1 none Free Dynamics model for the first channel.
You can choose between 3 options:
  • -1, Uses the default builtin model ().
  • 0, calculation with D will be skipped, afd1 = 0.
  • Input model, input your own model. It can be a an ao, in the last case afd1 is set to the input value.Note. Calibration parameters w1, w2, m1, m2, msc, Gammax are used only for the case -1
FREEDYN_DELTA -1 none Free Dynamics model for the differential channel.
You can choose between 3 options:
  • -1, Uses the default builtin model ().
  • 0, calculation with D will be skipped.
  • Input model, input your own model, afdD = 0. It can be an ao, in the last case afdD is set to the input value.Note. Calibration parameters w1, w2, m1, m2, msc, Gammax are used only for the case -1
HDF -1 none Drag-free controller model.
You can choose between 3 options:
  • -1, Uses the default builtin model ().
  • 0, calculation with Hdf will be skipped, acom1 = 0.
  • Input model, input your own model.It can be a miir, mfir, pzmodel, smodel or an ao with the commanded force
HSUS -1 none Electrostatic suspension controller model.
You can choose between 3 options:
  • -1, Uses the default builtin model ().
  • 0, calculation with Hsus will be skipped, acomD = 0.
  • Input model, input your own model.It can be a miir, mfir, pzmodel, smodel or an ao with the commanded force
ADF -1 none Thrusters actuation model.
You can choose between 3 options:
  • -1, Uses the default builtin model ().
  • 0, calculation with Adf will be skipped, ac1 = acom1.
  • Input model, input your own model.It can be a miir, mfir, pzmodel, smodel
ASUS -1 none Electrostatic actuation model.
You can choose between 3 options:
  • -1, Uses the default builtin model ().
  • 0, calculation with Asus will be skipped, acD = acomD;
  • Input model, input your own model.It can be a miir, mfir, pzmodel, smodel
SUBTRACTDELTASTIFFNESS 1
  • 1
  • 0
Decide to remove or keep the force noise term on the differential channel arising from the stiffness unbalance.
You can choose between 2 options:
  • true, decide to subtract the term from the differental force per unit of mass.
  • false, decide to keep the term in the differential force per unit of mass.
OMS DELAY O1 0.40000000000000002 none OMS processing delay on channel 1 [s]

OMS DELAY OD 0.40000000000000002 none OMS processing delay on differential channel [s]

FS 10 none sampling frequency in Hz

THRUSTERS ACTUATION DELAY 0.20000000000000001 none delay time in seconds

GDF 1 none thrusters actuation gain

SUSPENSION ACTUATION DELAY 0 none delay time in seconds

GSUS 1 none suspension actuation gain

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Some information of the method ao/ltp_ifo2acc are listed below:
Class name ao
Method name ltp_ifo2acc
Category Signal Processing
CVS Version $Id: ltp_ifo2acc.m,v 1.13 2012/03/21 13:37:06 luigi Exp $
Min input args 2
Max input args 2
Min output args 2
Max output args 2




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