| 4.4.4.5-6-1 Ensure torque and/or force margin analyses under worst case conditions are performed |
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Ensure 100% static torque or force margin at any position of motion under worst case environmental conditions, including resistance from detent/backdrive torque. Ensure 25% dynamic torque or force margin at any position of motion; evaluate excess torque and whether detrimental to the design. Ensure torque margin requirements met before and after gearbox and/or harmonic drive train. Ensure wiring harness parameters affecting loop-torque & stiffness identified, controlled, & documented. Ensure 100% minimum retraction force margin at worst-case environmental conditions and tolerances for non-explosive pin pullers.
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NA
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NA
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AIAA S-114-2005
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| 4.4.4.5-6-2 Ensure motor analyses are performed |
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Analyses should include step stability, backdrive torque/force margin, torque/force margin including back-Electro-Magnetic Field (EMF), and unpowered holding torque margin.
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NA
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NA
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AIAA S-114-2005
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| 4.4.4.5-6-3 Ensure end-of-travel stop/latch structural analysis is performed |
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Ensure a structural (static) yield factor of safety of at least 2.0 for maximum impact loads on mechanical stops or shoulders.
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NA
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NA
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AIAA S-114-2005
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| 4.4.4.5-6-4 Ensure bearing analyses are performed |
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Bearing analyses should include contact stress, truncation, preload, Elastohydrodynamic (EHD) regime, and life.
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NA
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NA
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AIAA S-114-2005
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| 4.4.4.5-6-5 Ensure tolerance analyses are performed |
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Phase B |
Phase C |
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Ensure that tolerances on all parts used in Moving Mechanical Assembly (MMA)s are established and analyzed to maintain adequate clearances under all environmentally-induced conditions.
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NA
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NA
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AIAA S-114-2005
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| 4.4.4.5-6-6 Ensure clearances within the Moving Mechanical Assembly (MMA), and between MMAs and other elements, are evaluated |
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Phase B |
Phase C |
Phase D1 |
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Ensure deployment clearance requirements (including fields of view/regard) are established and maintained. Ensure that attachment clamps, e.g., are used to prevent movement of harness into motion path. Ensure thermal blanket billowing and movement are included in the analysis.
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NA
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NA
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AIAA S-114-2005
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