IRMS Rotator Module Support Structure Conceptual Design B. Weber October 3, 2011.

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Presentation transcript:

IRMS Rotator Module Support Structure Conceptual Design B. Weber October 3, 2011

Support Structure Based on IRIS Design Concept 10/3/20112 IRIS supports (transparent) IRMS support weldment (green) IRMS rotator module interface Ring weldment (purple) Mount brackets (red) bridge between the interface ring and the locations where Keck Observatory defining points are normally attached to the module (4X)

Support Structure Based on IRIS Design Concept 10/3/20113

IRMS Support Structure W/Out IRIS Overlay 10/3/20114 Available instrument space envelope (transparent) IRIS to NFIRAOS Interface Overlay (transparent)

IRMS Support Structure W/Out IRIS Overlay 10/3/20115

IRMS Support Structure Front & Back Views 10/3/20116

IRMS Support Structure Side Section View 10/3/20117

Conceptual Design Analysis Overview IRMS Weight Estimate: 13,000 lbs. (5,909 kg.) – Instrument: 5,500 lbs. (2,500 kg.) – Rotator Module: 2,500 lbs. (1,136 kg.) – Support Structure: 5,000 lbs. (2,273 kg.) Support Structure FEA Results Summary (FEA report at: ObservatoryInterfaces) ObservatoryInterfaces – Static vertical load Safety Factor = 5.6 (yield strength) – 1g lateral load minimum Safety Factor = 3.6 (yield strength) – 1 st Natural frequency of support structure (only) = 53.3 Hz – The static vertical load translated through the hexapod legs creates a maximum lateral radial load in the NFIRAOS structure = ~10,600 lbs. (4,818 kg.) tension. 10/3/20118