AAE 450 Spring 2008 Jeffrey Stuart January 17, 2008 Dynamics and Control Initial Inertia Matrix and Launch Scenario Considerations.

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AAE 450 Spring 2008 Jeffrey Stuart January 17, 2008 Dynamics and Control Initial Inertia Matrix and Launch Scenario Considerations

Basic Inertia Matrix Image credit: Michael Walker Assumptions: constant mass uniform density axisymmetric

AAE 450 Spring 2008 Launch Scenarios  Traditional Ground Launch –Active Steering: thrust vectoring, control surfaces –Passive Steering: gravity turn  Air Launch –Drop detachment –Thrust detachment  Assisted Ground Launch –Control of Launch Angle –Needs to withstand high accelerations: 30.1g Dynamics and Control Future Work  Develop Rigid Body Equations of Motion  Develop Steering Law

AAE 450 Spring 2008 References  Rockoon Sounding Rockets  SpaceShipOne  Railgun Launching Dynamics and Control

Railgun Acceleration Calculation AAE 450 Spring 2008 Parameters: 400km orbitμ = km 3 /s 2 1km launch railR earth = 6356km Δv = 0.1*v circ (no Δv losses)constant acceleration Acceleration of 30.06g Dynamics and Control