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Modeling simple aerospace dynamics using CBDs

Modeling simple aerospace dynamics using CBDs. Elijah Johnson, COMP 522, 12/15/2008. Requirements. Model increasingly complex aerospace dynamics Optimize motion given some constraint(s) Simulate results using Flight Gear. Dynamics Modeling. Simple ballistics problem 2D, 2DOF

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Modeling simple aerospace dynamics using CBDs

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  1. Modeling simple aerospace dynamics using CBDs Elijah Johnson, COMP 522, 12/15/2008

  2. Requirements • Model increasingly complex aerospace dynamics • Optimize motion given some constraint(s) • Simulate results using Flight Gear

  3. Dynamics Modeling • Simple ballistics problem • 2D, 2DOF • Wind resistance, gravity, initial force • Laplace domain analysis in MATLAB • Impact forces

  4. Optimization • Typically, projectile wants to reach some target • Convert into root-finding problem • Bisection method • What about minimizing the force?

  5. Increasing Model Complexity • ‘Lift’ effects • Reduction in gravitational effects • Varying wind resistance • Analysis in 3 dimensions • Coriolis effects • “an apparent deflection of moving objects when they are viewed from a rotating frame of reference”

  6. Coriolis effect

  7. Simulation • Mapping local coordinates to geospatial coordinates

  8. Further complexities • Complex lift forces to determine changes in projectile motion • Complex environment model to determine effects of dynamic air pressure, jet stream, etc. on motion • Verification of results with real-world data

  9. Questions?

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