.. _auto_curve_olc_psi:

*COMPUTE THE OCCUPANT LOAD CRITERIA FROM A GIVEN VEHICLE VELOCITY*
==================================================================

Computes the Occupant Load Criteria (OLC) in PSI units from a vehicle velocity time history. The OLC is derived by integrating the velocity curve over a specified displacement window and applying an optional acceleration scale factor. Use this worker to evaluate occupant loading severity in crash pulse analyses.

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

Classification: **process**.

Tagged: ``acceleration``, ``crash_pulse``, ``displacement_window``, ``occupant_load_criteria``, ``olc``, ``psi``, ``vehicle_velocity``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve
     - vehicle_velocity
     - vector
     - —
     - 
     - Vehicle velocity time history curve (time vs. velocity, e.g. in mm/ms or m/s) used as the basis for OLC computation; must be supplied as a vector/curve object.
   * - Min Disp
     - min_disp
     - scalar
     - 65
     - 
     - Lower bound of the displacement integration window in mm (default 65 mm); defines the start of the OLC evaluation range.
   * - Max Disp
     - max_disp
     - scalar
     - 300
     - 
     - Upper bound of the displacement integration window in mm (default 300 mm); defines the end of the OLC evaluation range.
   * - Scale Factor
     - scale_factor
     - number
     - 1
     - 
     - Multiplicative scale factor applied to the derived acceleration signal before OLC calculation (default 1.0; adjust to convert units or normalise the input curve).

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_olc_psi_output_1
     - curve_olc_psi_output_1
     - scalar
     - Scalar OLC value in PSI (g-equivalent occupant deceleration) computed over the specified displacement window from the input vehicle velocity curve.

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

- data.curve.transform
- 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_olc_psi <https://www.d3view.com/api/workflow/example?id=curve_olc_psi>`_

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_olc_psi</code>. Schema hash: <code>ea68ba781b5f</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>