Path: Orbit/RHSOrbit
% RHS for 2D polar orbit
The tangential and radial components of acceleration are throttled
independently.
Default data structure is for Pluto.
u is the radial direction and v is the tangent direction.
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Form:
xDot = RHS2DPolarOrbit( x, t, d )
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Inputs
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x (4,1) [r;u;v;theta] [km;km/s;km/s;rad/s]
t (1,1) Time (s) (unused)
d (.) Data structure describing spacecraft model
.a (2,1) Throttle -1 to 1 in [u;v]
.mu (1,1) Gravitational parameter (km^3/s^2)
.aMax (1,1) Maximum acceleration (km/s^2)
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Outputs
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xDot (4,1) [rDot;uDot;vDot;thetaDot] [km;km/s;km/s;rad/s]/s
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Reference: Bryson, A, and Ho Yu-Chi, "Applied Optimal Control",
Hemisphere, p 67.
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