Hi,
One comment and some documentation has indicted that FDM doesnt consume
much CPU.
I ask myself why?
The modelling of a generalised rigid body with six degrees of freedom
in a rotating frame of
reference should max out anyones and everyones CPU!
Of course any model is only as good as the approximations used so we
apply symmetry to
an aircraft (what happens if an engine drops off!) and various other
restrictions. From my point
of view I would rather devote spare CPU to the accuracy of the FDM.
I notice that JSBSim uses a simple single step method for integration
whereas LaRCSim uses
a multi-step method. Spare CPU could be utilised in doing a multi-step
predictor/corrector integration
with variable step size especially for more esoteric aircraft types
with high speeds and high altitudes
and even near orbital capability in JSBSim.
Anyone with any comments or advice or done anything similar?
cheers
Jim
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