Astos Solutions a Major Step to Efficient Trajectory Simulation And
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Astos Solutions A Major Step to Efficient Trajectory Simulation and Optimization Astrodynamics Workshop 2006 Dipl.-Ing. Sven Weikert ASTOS Solutions GmbH i.Gr. Astos Content Solutions 1. What is ASTOS? 2. History of ASTOS 3. What is new in ASTOS V6 Astos What is ASTOS? Solutions ASTOS is an abbreviation for Aerospace Trajectory Optimization Software Graphical User Interface Optimization Methods PROMIS TROPIC ASTOS CAMTOS Model Library CGA SOCS Astos ASTOS Capabilities Solutions • Performance evaluations of specific launch and reentry vehicles (payload maximization, fuel allocation, etc.) • Orbit transfer missions • Trajectory design w.r.t. mission constraints (including ground-station visibility, vehicle constraints, ...) • Vehicle design (tank sizing, staging, e.g. for FLPP) • Mission design and analysis (e.g. performance charts) • Mission support in ground segment Astos History of ASTOS Solutions 1989 ALTOS 1 - Launcher trajectory optimization 1996 ALTOS 3 – Reference trajectory computation for capsule reentry 1999 ALTOS 4 – Combined optimization of launch and reentry as required for RLVs 2000 First ASTOS for Microsoft Windows 2001 SOCS-Add-on - Low thrust missions 2002 Aeroassist maneuvers at mars and earth 2003 DLL-Interface for user-coded models 2005 CGA – Genetic Algorithm for interplanetary missions Astos ASTOS Applications in the Last 5 Years Solutions Hopper Vega BeagleNet Electrical Vega ATPE Ariane 5 ECA Sphynx CTV 2 Fly-Back Booster Capree Soyuz Mars Demo Lander Lunar Excursion Vehicle CTV Expert IXV Mars Ascent Vehicle ARD Skylon Beagle-2 ExoMars09 Conventional Launchers Advanced Launchers / RLV ConeXpress-OLEV Socrates Reentry Vehicles Heavy Lift Launcher X38 Orbit Transfers / Others Astos ASTOS V6 Solutions ASTOS V6 is a cornerstone towards an optimization software as a black box • Wizards guide inexperienced users • Automatic mesh generation • Automatic mesh refinement • Improved observation of the iteration process Astos ASTOS V6 Model Library Solutions • Multiple cost functions • New visibility constraints • Splash down and safety analysis • GRAM 99 atmosphere with perturbations • LO-frame for attitude controls suitable for low thrust orbit transfers Astos What is New Before Optimization? Solutions Mesh definition was always a problem for many users! Automatic mesh generation for the initial guess Advanced mesh modification features In a concurrent design engineering team a common data exchange format is needed! New data import features: all components, propulsions, aerodynamics, etc. may be configured by an ODBC source like an Excel sheet Astos ASTOS Data Exchange Solutions Internal subsystem validation ASTOS Excel Workbook Subsystem Software Constraint Correlation limits of Propulsion Worksheets for: factors for mass system • various evolutions approximation incl region Correlation • Subsystems incl. of validity factors for mass approximation detailed and reduced model (cells, tables) Table data of Table data of thrust, massflow, T, dm/dt, ce, c* • additional calculations drag, lift drag, lift • Diagrams • ASTOS results Mass of Trajectory data subsystems Design Parameters Controls Request for Request for traj. & data refinement model & data refinement Astos And during Optimization? Solutions Users of optimization software are often stumped when an error arises during optimization and the optimization doesn‘t converge! New and improved iteration viewer features let the user observe the iteration process in more detail In case of an error an automatic problem analysis procedure supports the user to find obstacles like infeasable constraints Improved scaling Astos And After the Optimization Process? Solutions • new sensitivity analysis feature • comprehensive result visualisation capabilities • extended data export options Astos Result Visualisation Solutions • Numeric Result Summary • Graphical Visualisation – 2D Plots – 3D Plots – 2D and 3D Map Plots auxiliary data (like ground stations) may be added to each plot type ASTOS users become more independant from expensive “plotting“ tools like Matlab or STK • Numerous export filters to visualize results with other tools – Excel – Matlab – STK – Orbiter Space Flight Simulator – Celestia – Text-file ... Astos Events and Auxiliary Data Solutions • Plot data from several sources – Optimization – Initial Guess – Other optimization results • Auxiliary objects – Ground stations – Impact points • Event visualisation (max/min, Ma=1, ...) – Max dynamic pressure – Max heat flux – Bending moment ... Astos Groundtrack Plotting Solutions • Different maps • 8 different projections • 3D with altitude information or simply 2D Astos Splash Down Analysis Plots Solutions Impact Constraint Ground Track Impact Points Demised Objects Astos Result Overview Solutions •Change size of individual plots •Arrange plots however you like •Change axes units •Add/move legends •Use several tabs •Save and load viewer settings and plot content •Print / export individual plot or complete view Astos Real Time Animation Solutions • Comparison of real flight data with optimized data • Real time 3D animation during flight – Orbiter – STK – Celestia • Visualization of operation center displays with Orbiter Astos Advantages to your company Solutions • Fast result computation Let you save time and cost • ASTOS is a commercial product Comprehensive customer support - Service On-Site - Support on demand - Quick response - Internet Screen Sharing Continuous advancement of the software Extensive documentation • Flexible • One tool for several applications Several departments can use ASTOS (with just one floating license) • Customer specific features are possible.