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Enhancements to the structural control submodule of ServoDyn#3221

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luwang00 wants to merge 5 commits intoOpenFAST:devfrom
luwang00:f/StC_Omni3
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Enhancements to the structural control submodule of ServoDyn#3221
luwang00 wants to merge 5 commits intoOpenFAST:devfrom
luwang00:f/StC_Omni3

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@luwang00 luwang00 commented Feb 26, 2026

This PR is not ready to be merged. Need to update r-test first.

Feature or improvement description
This PR contains two enhancements to the structural control submodule of ServoDyn:

  • A new option StC_DOF_MODE=6 has been added. This option provides a 3DOF omni-directional TMD to supplement the existing 2DOF (XY) omni-directional TMD.

  • A new option StC_CMODE=3 has been added. This option enables active control through a user-defined subroutine. A template subroutine has been added to modules/servodyn/src/UserSubs.f90.

Impacted areas of the software
ServoDyn

Test results, if applicable
The StC reaction moment with StC_DOF_MODE=2 has been updated for robustness, leading to negligible changes in the test results of StC_test_OC4Semi.

  • Requires merging r-test (to be prepared)

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