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Dynamics and Control in Launch Scenarios: Inertia Matrix Analysis

Discussing initial inertia matrix and launch scenarios for high-acceleration launches, including ground, air, and assisted launches. Future work includes developing steering laws and equations of motion.

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Dynamics and Control in Launch Scenarios: Inertia Matrix Analysis

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  1. Jeffrey StuartJanuary 17, 2008Dynamics and ControlInitial Inertia Matrix and Launch Scenario Considerations AAE 450 Spring 2008

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

  3. 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 Future Work • Develop Rigid Body Equations of Motion • Develop Steering Law AAE 450 Spring 2008 Dynamics and Control

  4. References • Rockoon Sounding Rockets http://www.astronautix.com/lvs/rockoon.htm • SpaceShipOne http://www.astronautix.com/craft/spaipone.htm • Railgun Launching http://en.wikipedia.org/wiki/Railgun AAE 450 Spring 2008 Dynamics and Control

  5. Railgun Acceleration Calculation Parameters: 400km orbit μ = 398600 km3/s2 1km launch rail Rearth = 6356km Δv = 0.1*vcirc (no Δv losses) constant acceleration Acceleration of 30.06g AAE 450 Spring 2008 Dynamics and Control

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