29 lines
1.1 KiB
Markdown
29 lines
1.1 KiB
Markdown
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# Study 01 — Sensitivity Map (Method D)
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**Type:** Parametric — Prescribed Unit Displacements
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**Runs:** 12 (9 unique @ 60° + 1 baseline + 2 spot checks @ 40°)
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**Model:** Enforced displacement BCs with expression control
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## What This Does
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Applies +1 μm displacement at each unique interface point in each global DOF direction, one at a time. Measures ΔWFE to build a sensitivity matrix: **nm WFE per μm displacement per DOF per point.**
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This is the PRIMARY deliverable for StarSpec.
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## .sim Setup Required
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1. Create 9 NX expressions: `dV1_X, dV1_Y, dV1_Z, dV2_X, dV2_Y, dV2_Z, dL1_X, dL1_Y, dL1_Z` (all default = 0)
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2. Apply enforced displacement BCs on all 5 support nodes referencing these expressions
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3. Symmetry ties: V_right X = −dV2_X, L_right X = −dL1_X; Y/Z same sign as left counterpart
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4. Gravity load at target elevation (60° or 40°)
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## Extractor
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Zernike annular OPD: 50 modes, J5+ filtered, inner_radius = 135.75 mm, reference subcase = 20° elevation.
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**Also extract individually:** J9, J10 (trefoil) and J11 (spherical) for secondary reporting.
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## Output
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Sensitivity matrix → feed into displacement limits and StarSpec deliverable.
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