Path: CubeSat/AttitudeControl
% CubeSat disturbance analysis from batch data using RHSCubeSat.
Compute the drag, magnetic, gravity gradient, and optical disturbances. The
environment is computed using AtmJ70, BDipole, and SunV1. AtmDens2
can be used instead by supplying an empty matrix for d.atm.
The built-in demo computes the disturbances on a 3U satellite for one day.
The center of mass is assumed to be offset from the geometric center of the
spacecraft by a few cm. Note the growth in momentum. the gravity gradient
torque is zero in the demo because the attitude entered is perfect LVLH and
the inertia is symmetric.
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Form:
[t, fECI, h, hECI] = CubeSatDisturbanceAnalysis( d, q, r, v, jD )
CubeSatDisturbanceAnalysis % demo
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Inputs
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d (.) Data structure from RHSCubeSat
q (4,:) Quaternion, ECI to body
r (3,:) Position vector
v (3,:) Velocity vector
jD (1,:) Julian dates
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Outputs
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tT (3,:) Torque in body (Nms)
fECI (3,:) Force in ECI (N)
h (3,:) Body momentum (Nms)
hECI (3,:) ECI momentum (Nms)
torque (.) Torque structure
.total (3,:) Torque in body frame
.aero (3,:) Aerodynamic torque
.mag (3,:) Magnetic torque
.optical (3,:) Optical torque
.gg (3,:) Gravity gradient torque
force (.) Force structure
.total (3,:) Force in ECI frame
.aero (3,:) Aerodynamic force
.optical (3,:) Optical force
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See also CubeSatAero, CubeSatRadiationPressure, GravityGradientFromR,
RHSCubeSat
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AC: ACData/ACTConstants ACPro: Help/HelpSystem AerospaceUtils: AtmosphericCalculations/AtmDens2 AerospaceUtils: AtmosphericCalculations/AtmJ70 AerospaceUtils: AtmosphericCalculations/BaromExp AerospaceUtils: AtmosphericCalculations/DiffusionExp AerospaceUtils: CAD/GenericProperties AerospaceUtils: Coord/ECIToEF AerospaceUtils: Coord/QIToBDot AerospaceUtils: Coord/QLVLH Common: CommonData/Constants Common: CommonData/Sosumi Common: CommonData/SwooshWatermark Common: CommonData/xSplashSmall Common: ComponentModels/Box Common: Control/C2DZOH Common: Database/Constant Common: FileUtils/FindDirectory Common: GUIs/Figui Common: GUIs/MessageQueue Common: General/CellToMat Common: General/CloseFigure Common: General/DeBlankLT Common: General/DeleteCell Common: General/FSWClock Common: General/ListCases Common: General/MatToCell Common: General/Watermark Common: Graphics/AddFillToPlots Common: Graphics/AxesCart Common: Graphics/DrawVertices Common: Graphics/NPlot Common: Graphics/NewFig Common: Graphics/Plot2D Common: Graphics/Plot3D Common: Graphics/PltStyle Common: Graphics/SortFigs Common: Graphics/TimeLabl Common: Graphics/TitleS Common: Graphics/XLabelS Common: Graphics/YLabelS Common: Graphics/ZLabelS Common: MassProperties/AddMass Common: MassProperties/IC623X3 Common: MassProperties/Inertias Common: Quaternion/AU2Q Common: Quaternion/Mat2Q Common: Quaternion/QForm Common: Quaternion/QMult Common: Quaternion/QTForm Common: Time/DTAToDTS Common: Time/DTSToDTA Common: Time/Date2DN Common: Time/Date2JD Common: Time/JD2000 Common: Time/JD2DN Common: Time/JD2Date Common: Time/JD2T Common: Time/T2JD CubeSat: Power/SolarCellPower CubeSat: Simulation/CubeSatAero CubeSat: Simulation/CubeSatEnvironment CubeSat: Simulation/CubeSatRadiationPressure CubeSat: Simulation/RHSCubeSat CubeSat: Utilities/CubeSatAttitude CubeSat: Utilities/CubeSatFaces CubeSat: Utilities/CubeSatModel CubeSat: Visualization/DrawCubeSat Math: Linear/Cross Math: Linear/Dot Math: Linear/DupVect Math: Linear/Mag Math: Linear/Skew Math: Linear/SkewSq Math: Linear/SkewSymm Math: Linear/Unit Math: MathUtils/R2P5 Math: Trigonometry/ACosD Math: Trigonometry/CosD Math: Trigonometry/SinD SC: BasicOrbit/E2M SC: BasicOrbit/Nu2E SC: BasicOrbit/Nu2M SC: BasicOrbit/Period SC: BasicOrbit/RV2El SC: BasicOrbit/RVFromKepler SC: Disturbances/GravityGradientFromR SC: Disturbances/OpticalSurfaceProperties SC: Disturbances/SolarF SC: Environs/BDipole SC: Environs/SolarFluxPrediction SC: Ephem/EarthRte SC: Ephem/Eclipse SC: Ephem/MSidDay SC: Ephem/SunV1 SC: SCData/sCTConstants SC: SCMat/EarthMR SC: SCMat/SolarFluxPredictions SC: Visualization/PlotPlanet
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