Path: Missions/LunarLanding
% Generate the orbit state matrices
The matrices are ax = b
x is the vector of decision variables or controls
The order is [x1;x2;x3;...;xN] where each x is a vector
xI is only used to compute the term mu/R^3. A constant xI is
sufficient for most low-altitude landings.
Type OrbitStateMatrices for a demo.
--------------------------------------------------------------------------
Form:
[a,b,xF0,aX,bX] = OrbitStateMatrices( xI, xF, dT, d )
--------------------------------------------------------------------------
------
Inputs
------
x (6,:) States [x;y;z;vX;vY;vZ]
xF (6,:) Final desired state [x;y;z;vX;vY;vZ]
dT (1,1) Delta time
d (.) Data structure describing spacecraft model
.beta (1,:) Thrust angle in rv plane
.alpha (1,:) Thrust angle out of plane
.thrust (1,:) Thrust (N)
.accel (1,:) 'constant' or 'free'
.m0 (1,1) Dry mass
.radius (1,1) Planet radius
-------
Outputs
-------
a (6,3*n) Matrix multiplying the decision variables
b (6,1) Right hand side
xF0 (6,1) Final state without control
aX {n} Cell array of state transition matrices
bX {n} Cell array of input matrices
--------------------------------------------------------------------------
AC: ACData/ACTConstants Missions: LunarLanding/RHSPlanet3D Missions: LunarLanding/RHSPlanet3DToAB SC: BasicOrbit/Period SC: SCData/sCTConstants Common: CommonData/Constants Common: CommonData/SwooshWatermark Common: CommonData/xSplashSmall Common: Control/C2DZOH Common: Database/Constant Common: General/CellToMat Common: General/DeleteCell Common: General/DispWithTitle Common: General/MatToCell Common: General/Watermark Common: Graphics/NewFig Common: Graphics/Plot2D Common: Graphics/PltStyle Math: Linear/Mag Math: Linear/Skew
Back to the Missions Module page