1 Daniel Chua 14 February 2008 Trajectory Optimization (MAT Trajectory Contact, CAD) Distributed Trajectory Optimization (Steering Angle Ranges decided by entire group)

2 Trajectory Optimization – Criteria  Launch Vehicle must not go underground  Perigee must be at least 300km  Eccentricity must not be greater than 0.5  Minimize ΔV Trajectory Optimization Assumption  Spin-stabilized 3rd stage (no steering after 2 nd stage)

3 Trajectory Optimization  Loop through a range of steering angles  Save 2 files (successful/unsuccessful by first 3 criteria)  Sort by ΔV Trajectory Optimization Distributed Trajectory Optimization  “Embarrassingly parallel” problem  Limit range of angles  Run for-loops separately on multiple CPU cores  Combine results

4 Trajectory Optimization References  The MathWorks, Distributed Computing Toolbox 3 User’s Guide, The MathWorks, 2007