Wissenschaftliche Arbeitsgemeinschaft für Raketentechnik und Raumfahrt. Lehrstuhl für Raumfahrttechnik Technische Universität München

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2 Structure and Mechanisms Work Package Report

3 FEM Simulation Goals: 1.) Find out if two mechanisms are required to hold down the solar panels 2.) Find out if a middle plate is required to stabilize structure 3 Technische Universität München

4 FEM Simulation Loads (taken from Dnepr User s guide): => 10g static load used 4 Technische Universität München

5 FEM Simulation Loads (taken from Dnepr User s Guide): Two tests: One using three superimposed sine loads for 10 seconds and one using 1g at 20Hz for 60 seconds 5 Technische Universität München

6 FEM Simulation Loads (taken from Dnepr User s Guide): Acoustic loads do not have to be considered for small satellites Shock loads not tested yet => further research necessary 6 Technische Universität München

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9 Static deformation ~ 1,6mm Max deformation ~ 2,5mm Static deformation ~ 0,6mm Max deformation ~ 0,8mm 9 Technische Universität München

10 Maximum Deformation 2mm Maximum Deformation 0,7mm 10 Technische Universität München

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13 Max deformation 2mm?? Max deformation 30mm???! 13 Technische Universität München

14 FEM Simulation To do: Implement shock load simulation Refine Plate Simulation Define acceptable deformations (2.5mm for solar panels too much??) Possibly verification testing 14 Technische Universität München

15 Aufklappmechanismus CDMM CDMM-C CDMM-C-TF Auswahl E-Magnet 15 Technische Universität München

16 Structure and Mechanisms Work Package Report CDMM Central Deployment Mechanism Magnetic 16

17 Structure and Mechanisms Work Package Report Erforderliche Federkraft (Hold Down) / Magnetkraft (Release) Fdyn MOS MOS Fm Fdyn FHS MTS Fm FHS MOS MOS 17

18 Structure and Mechanisms Work Package Report Annahmen - Panel Masse: 40g/Panel Dynamische Last beim Start: 10g (wirkt auf 2 Panels) Beschleunigung beim Öffnen durch Federn: in 1sec Erforderliche Magnetkraft FM = 4,8N Ein Magnet, Sicherheitsfaktor: 1,5 Erforderliche Federkraft FHS = 1,3N Nachteile Mechanismus: Dyn. Panellast wird auf den Mechanismus übertragen Komplexer Aufbau (viele Gelenke) 18

19 Structure and Mechanisms Work Package Report CDMM-C Central Deployment Mechanism Magnetic Centered Vorteile: Aufbau vereinfacht Geringeres Gewicht Möglicher Nachteil: Mittiger Panelhaltepunkt 19

20 Structure and Mechanisms Work Package Report CDMM-C-TF Central Deployment Mechanism Magnetic Centered Torque Free Erforderliche Magnetkraft FM = 1,5-2 N 20

21 Structure and Mechanisms Work Package Report Elektromagnete kaufen / bauen!? 21

22 Structure and Mechanisms Work Package Report 22

23 Structure and Mechanisms Work Package Report Red Magnetics (aus Freising) 23

24 Structure and Mechanisms Work Package Report Mannel Magnet 24

25 Creative Competition Goals: 1.) Find out new ideas for the mechanism to release the solar panels 2.) Work out these concepts to find more (better) solutions 25

26 Concept o article in Reisswolf describes the the problem and gives all information to the students oshort version of the text in Klopapier to reach a lot of attention oposter also to gain more feedback 26

27 Content Some general information about the project MOVE2WARP All necessary information and requirements to create some kind of release mechanism in form of CAD-Models, sketches, design, The prize for the best ideas QR-Code to a facebooksíte where they can get more details Deadline is :.. 27

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30 Next steps Gather the results, convert and develop them into a new release machanism See what is possible and can be used Name a winner of the competition 30