.. _auto_curve_threems_clip:

*COMPUTE 3MS CLIP*
==================

Computes the 3ms clip value for a given acceleration curve, a standard metric in crash safety analysis representing the maximum acceleration level sustained for at least 3 milliseconds. Accepts an optional time scale factor and a return-type selector to control whether the result is expressed as the clipping interval (t1/t2) or the peak value with its onset time (t1/Ymax).

When to use
-----------

Classification: **process**.

Tagged: ``3ms_clip``, ``FMVSS``, ``HIC``, ``NCAP``, ``acceleration``, ``crash``, ``curve_transform``, ``injury_criteria``.

Inputs
------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20 20 20

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve
     - curve
     - vector
     - —
     - 
     - Input acceleration-vs-time curve (x = time in model units, y = acceleration in g's) on which the 3ms clip calculation is performed; connect a vector curve output from an upstream extraction or transformation worker.
   * - time_sf
     - time_sf
     - scalar
     - 1.0
     - 
     - Scalar scale factor applied to the time axis before computing the clip (e.g. 1e-3 to convert milliseconds to seconds); default is 1.0 (no scaling).
   * - return_type
     - return_type
     - list
     - t1t2
     - 
     - Selects the form of the returned result: 't1t2' returns the start and end times of the worst 3ms window, 't1Ymax' returns the window start time and the peak clipped acceleration value; default is 't1t2'.

Outputs
-------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - curve_threems_clip_output_1
     - curve_threems_clip_output_1
     - scalar
     - Scalar result of the 3ms clip calculation: either the [t1, t2] interval boundaries (seconds) or the [t1, Ymax] pair (seconds, g's), depending on the selected return_type.

Disciplines
-----------

- data.curve.transform
- data.signal_processing
- engineering.crash.occupant_safety

Runnable example
----------------

A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: `/api/workflow/example?id=curve_threems_clip <https://www.d3view.com/api/workflow/example?id=curve_threems_clip>`_

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_threems_clip</code>. Schema hash: <code>f7e95f93eaef</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>