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QUBIC Mount Design

QUBIC Mount Design. For Technological Demonstrator (T.D.) And For Final Instrument (F.I.). Luis Mariano Mundo, Pablo L. Ringegni , Asdrubal Botani , German Wasserman. Topics. Mount Requirements. Mount Structural and Mechanical Design. Mount Assembly. Mount Structural Analysis.

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QUBIC Mount Design

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  1. QUBIC Mount Design For Technological Demonstrator (T.D.) And For Final Instrument (F.I.) Luis Mariano Mundo, Pablo L. Ringegni, Asdrubal Botani, German Wasserman QUBIC Collaboration Meeting, January 18/19, Milano

  2. Topics • Mount Requirements. • Mount Structural and Mechanical Design. • Mount Assembly. • Mount Structural Analysis. • Building General Dimensions. • Building Load Calculus. • Next Steps. QUBIC Collaboration Meeting, January 18/19, Milano

  3. Requirements Operation Requirements • The Mount shall be able to rotate the QUBIC around the Optical, Elevation and Azimuth Axis. • All the rotations should be remotely operated. • Pointingaccuracy: • Azimuth and Elevation rotations: Better or equal to 0,05°. • Optical: less than 1°. QUBIC Collaboration Meeting, January 18/19, Milano

  4. Requirements Operation Requirements • Angular displacement: • Elevation: between +30° and +70° (zenith is at +90° and horizon at 0°). • Azimuth: between -400° and +400°. • Optical: axis between -15° and +15°. • Angular velocities: • Adjustable between 0°/s and 10°/s with steps no larger than 0.2 °/s. • Angular accelerations: • Azimuth and elevation axis: 10 °/s2. • Environmental Temperature: Aprox. 24°C QUBIC Collaboration Meeting, January 18/19, Milano

  5. Requirements Non Operation Requirements The worst non operation condition is the seismic condition. Argentinian Civil Construction Standars: INPRES-CIRSOC 103 - "Reglamento Argentino Para Construcciones Sismorresistentes") • No mechanical failure. • No permanent deformations. • No overload on QUBIC structure. QUBIC Collaboration Meeting, January 18/19, Milano

  6. Mass and dimentions of the QUBIC • Mass of the QUBIC:632 Kg + 5% estimation extra (cables, He fridges, internal electronics, screws). • General dimentions:1.6m (diameter) x 2.6 m (height including forebaffle). • Barycenter (cm):On global frame reference of the CAD, (only cryo). X = 0.12 Y = 21.01 Z = -12.33 • Inertial moments: (Kg cm2): Taken on barycenter and aligned as global coordinate reference in figure: Lxx = 2708507.81 Lxy = 1566.82 Lxz = 9782.29 Lyx = 1566.82 Lyy = 2570846.14 Lyz = -64547.93 Lzx = 9782.29 Lzy = -64547.93 Lzz = 1744671.09 QUBIC Collaboration Meeting, January 18/19, Milano

  7. Mount Structural Design Optical Rotation Elevation Rotation Azimuth Rotation Arms Body Base QUBIC Collaboration Meeting, January 18/19, Milano

  8. Mount Structural Design Optical Rotation Movement (TBC) Arms Auxiliary arm QUBIC Collaboration Meeting, January 18/19, Milano

  9. Mount Structural Design Optical Rotation Movement Fix the displacement in the plane perpendicular to the focal axis Radial Bearings Fix the rotations in the plane perpendicular to the focal axis and the displacements in the focal axis Tangential Bearings QUBIC Collaboration Meeting, January 18/19, Milano

  10. Mount Structural Design Optical Rotation Movement Focal Axis Movement: -15° a +15° Momentrequired: Motor-reductengranaje cilíndricos RF37/R CMP50S Manufacturer: SEW Eurodrive Encoder: MDX61B0008-5A3-4-0T QUBIC Collaboration Meeting, January 18/19, Milano

  11. Mount Structural Design Elevation Movement 4 High presition ball bearings Manufacturer: SKF (6218-2RS1) Driving Motors Manufacturer: SEW Eurodrive Motor-reductengr. cilíndricos RF77/R CMP63M Angular Encoder Manufacturer: SEW Eurodrive MDX61B0014-5A3-4-0T QUBIC Collaboration Meeting, January 18/19, Milano

  12. Mount Structural Design High presicion angular roller bearings Manufacturer: SKF (32940) Azimuth Movement Angular Encoder Manufacturer: Sew Eurodrive MDX61B0014-5A3-4-0T High presicion angular ball bearings Manufacturer: SKF (61940) Two driving motors: Motor-reductengr. cilíndricos RF37/R CMP50S Manufacturer: SEW Eurodrive QUBIC Collaboration Meeting, January 18/19, Milano

  13. Mount Structural Design Attachment to the building Level Adjustment System on each pillar (type screw-nut ) QUBIC Collaboration Meeting, January 18/19, Milano

  14. Mount Structural Design Bellows External edge of the circular plate used as top diameter of the bellows Internal Circular plate fixed to the Qubic front sheet External Circular plate fixed to the mount arms Circular ring used as the bottom diameter of the bellows QUBIC Collaboration Meeting, January 18/19, Milano

  15. Mount Structural Design Internal Circular plate Bellows (TBC) External Circular plate Waterproof Sliding Joint Circular Ring QUBIC Collaboration Meeting, January 18/19, Milano

  16. Mount Structural Design Bellows (TBC) Conceptual Groundshield Elevation angle limits: 30° - 90° (0° Horizontal) QUBIC Collaboration Meeting, January 18/19, Milano

  17. Mount Structural Design Ground Shield 7000mm Walk area: 400 mm 1600mm 3900mm Roof hole: 3100 mm QUBIC Collaboration Meeting, January 18/19, Milano

  18. Mount Structural Design Mount Assembly in the building: (Could be modified) 1.- 3.- 2.- 4.- 5.- QUBIC Collaboration Meeting, January 18/19, Milano

  19. Mount Structural Analysis Finite element model (Preliminary analysis) • The QUBIC structural stiffness is not considered. • The interaction between the QUBIC and the mount was not considered. • The weight and inertia loads of the QUBIC were applied as concentrated loads in the arms bearings positions. • The stiffness or elasticity of the joint elements between the parts of the model (bearings, gears) is not considered yet . • Was considered the horizontal position of the QUBIQ as the worst position (Farthest QUBIC CG position from the arms). QUBIC CG position from the arms: 143mm QUBIC Collaboration Meeting, January 18/19, Milano

  20. Mount Structural Analysis • Load Conditions: • Operational Condition: • Weight Loads and inertia loads due to the rotation movements. • Objective: Meet the maximum pointing error (0.05°), to obtain the displacements in the bearings that attach the QUBIC, to verify stress in the mount, to obtain the efforts in the components. • Non Operational Condition: • Weight loads and seismic loads (0,87g vertical and 0,27g Horizontal - INPRES-CIRSOC 103 - "Reglamento Argentino Para Construcciones Sismorresistentes") • Objective: No permanentdeformation in themountstructure, no mechanismfailure, to obtain the displacements in the bearings that attach the QUBIC. • Lifting Condition (TBC): • Weight load on lift condition considering only the focal axis structure (arms) and the QUBIC weight. • Objective: No permanentdeformation in themountstructure, to obtain the displacements in the bearings that attach the QUBIC. QUBIC Collaboration Meeting, January 18/19, Milano

  21. Mount Structural Analysis 5 Finite element model (Preliminary analysis): Results • Stress in the mount components • Displacements on bearing sites on the arms • Bearing pairs 1, 2, 3 and 4 displacement on Y direction. • Bearing pairs 5, 6, 7 and 8 displacements and loads on radial directions 8 1 4 2 3 6 7 QUBIC Collaboration Meeting, January 18/19, Milano

  22. Mount Structural Analysis 5 Finite element model (Preliminary analysis): Results – Operative Condition 8 1 4 2 3 6 7 Disp Y negative: Displacement to negative Y direction. U radial negative:thebearingis pressing que QUBIC QUBIC Collaboration Meeting, January 18/19, Milano

  23. Mount Structural Analysis 5 Interface loads between the QUBIC and the mount Finite element model (Preliminary analysis): Results – Operative Condition 8 1 4 2 3 6 7 QUBIC Collaboration Meeting, January 18/19, Milano

  24. Mount Structural Analysis Finite element model (Preliminary analysis): Operative Condition Results Stress [MPa] QUBIC Collaboration Meeting, January 18/19, Milano

  25. Mount Structural Analysis 5 Finite element model (Preliminary analysis): Results – Non Operative Condition 8 1 4 2 3 6 7 Disp Y negative: Displacement to negative Y direction. U radial negative:thebearingis pressing que QUBIC QUBIC Collaboration Meeting, January 18/19, Milano

  26. Mount Structural Analysis 5 Interface loads between the QUBIC and the mount Finite element model (Preliminary analysis): Results – Non Operative Condition 8 1 4 2 3 6 7 QUBIC Collaboration Meeting, January 18/19, Milano

  27. Mount Structural Analysis Finite element model (Preliminary analysis): Non Operative Condition Results Stress [MPa] QUBIC Collaboration Meeting, January 18/19, Milano

  28. Building: General dimensions Main structure built with steel sections and foam-aluminum composite panels QUBIC Collaboration Meeting, January 18/19, Milano

  29. Building: Actuatingloadsby CIRSOC Argentinian Civil constructionStandars PermanentLoads D (DeadLoads) CIRSOC 101 CoverOvercharge Lr (Live Load) CIRSOC 101 Wind Load W (Windloads) CIRSOC 102 Snow and Ice Load S (Snow loads) CIRSOC 104 Seismic Load E (Earthquakeloads) CIRSOC 103 QUBIC Collaboration Meeting, January 18/19, Milano

  30. Permanent Loads D: . Building weight 25000 N . Groundshield weight 10100 N (supposed) . CUBIC weight 7000 N Live load Lr : . CIRSOC 101 960 N/m2 Snow load S: . CIRSOC 104 720 N/m2 Ubicación en el mapa de cargas QUBIC Collaboration Meeting, January 18/19, Milano

  31. Windloads W: Should be considered in the ground shield structural design .CIRSOC 102 Velocidades básicas especificadas V(m/seg) Basic velocityV: 38 m/seg Factor de direccionalidad Kd = 0.95 Factor de Importancia I=1.00 Categoría de exposición C Factor topográfico Kzt = 1.90 Coeficiente de exposición Kz = 0.87 Dynamicpressurecalculus: qz(N/m2) = 0.613 KzKztKdI V2 qz=732 N/m2 Areadetail Topographic Factor Kzt: QUBIC Collaboration Meeting, January 18/19, Milano

  32. Siesmic Loads E: .CIRSOC 103 SismicZone: 2 Group: A Risk Factor: 1,00 SeismicCoef: Horizontal: 0,87 Vertical: 0,27 QUBIC Collaboration Meeting, January 18/19, Milano

  33. Loads combinations: Cirsoc 301 • Ultimate limit condition: • Case 1 1,4D • Case 3 1,2D + 1,6(Lr o S) + 0,8W • Case 4 1,2D + 0,5S + 1,6W • Case 5 1,2D + 0,2S + 1,0E • Case 6 0,9D + 1,5W • Service limit condition: • Case 1 1,0D + Lr • Case 2 1,0D + W QUBIC Collaboration Meeting, January 18/19, Milano

  34. Finite element model: QUBIC Collaboration Meeting, January 18/19, Milano

  35. Mount PreliminaryBudget (Dec., 2016) QUBIC Collaboration Meeting, January 18/19, Milano

  36. Mount PreliminaryBudget (Dec., 2016) QUBIC Collaboration Meeting, January 18/19, Milano

  37. Mount PreliminaryBudget (Dec., 2016) QUBIC Collaboration Meeting, January 18/19, Milano

  38. Mount PreliminaryBudget (Dec., 2016) QUBIC Collaboration Meeting, January 18/19, Milano

  39. NextSteps • Are defined the QUBIC Shipping way and conditions from Salta city to site?. These are necessary to define the way to integrate the QUBIC and the mount on site. • We Need to know the structural design status of the QUBIC interface. Requirements must be agree. • The implementation of the focal axis rotation is still under study due to the complexity of the mechanism and the time destined to build and test. • Perform the dynamic analysis of the mount (modal analysis). • Detail study of theMechanicalregulationsystem of the mount. • Study of the cable carriers implementation. • Continue with the building design and calculus. • Continue with the structural and mechanical design towards the detail design. • Define and design the Mechanical Ground Support Equipment for the mount. • Study and define the control of the movements. QUBIC Collaboration Meeting, January 18/19, Milano

  40. Thank you for your attention UID GEMA – Facultad de Ingeniería - UNLP QUBIC Collaboration Meeting, January 18/19, Milano

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