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spaceconcordia / rocketry-performance

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Angular Model is working, but is stabilizing around 3 radians #17

Closed SpaceShawn closed 8 years ago

SpaceShawn commented 8 years ago

Angular acceleration, Angular Velocity, Angular Position image

neil1993 commented 8 years ago

3000 rad/s^2 acceleration? That's insane. That would mean that the tip of the nose would be accelerating at more than 4500 m/s^2

Also, it seems like the position is beginning to diverge

SpaceShawn commented 8 years ago

This is due to an abnormally large lift force being generated. Below is a more sensible output, where a lift force is not actually calculated - only the Normal Force Coefficient is affected by the Rocket Body Lift Correction.

image

I will next incorporate the Pitch Damping Moment which may provide the damping required to stabilize the oscillation closer to zero.