.. _auto_curve_g_to_disp:

*CONVERT GS TO DISP*
====================

Converts an acceleration curve (in g's) to a displacement curve by double-integrating over time, applying a user-specified initial velocity and optional time scale factor. Use this worker when you need to derive structural or occupant displacement from a raw acceleration signal in crash or dynamics post-processing.

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

Classification: **process**.

Tagged: ``acceleration``, ``crash``, ``curve_transform``, ``displacement``, ``double_integration``, ``g_to_disp``, ``integration``, ``kinematics``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Acceleration Gs Per Second-squared
     - accelerationgspersecond-squared
     - vector
     - —
     - 
     - Input acceleration time-history curve in gravitational units (g's) vs. time (seconds); this is the signal that will be double-integrated to produce displacement.
   * - Velocity Unit
     - velocity_unit
     - scalar
     - mph
     - 
     - Unit of the initial velocity value used during the first integration step; choose 'mph', 'kmph', or 'mmps' — defaults to 'mph'.
   * - Disp Unit
     - disp_unit
     - scalar
     - mph
     - 
     - Desired unit for the output displacement curve; currently only 'mm' is supported — leave at default unless the option set is extended.
   * - Initial Velocity
     - initial_velocity
     - text
     - 1.0
     - 
     - Initial velocity (scalar float) applied as the integration constant for the first integration (g → velocity); defaults to 1.0 in the units specified by velocity_unit.
   * - Time Scale Factor
     - time_scalefactor
     - text
     - 1.0
     - 
     - Multiplicative scale factor applied to the time axis of the input curve before integration; use values other than 1.0 to rescale time units (e.g. ms → s); defaults to 1.0.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_g_to_disp_output_1
     - curve_g_to_disp_output_1
     - vector
     - Resulting displacement time-history curve (in the unit selected by disp_unit, typically mm) obtained by double-integrating the input acceleration signal with the given initial velocity and time scale factor.

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

- data.curve.transform
- data.signal_processing
- data.units
- engineering.crash.dynamics

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

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

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_g_to_disp</code>. Schema hash: <code>27dba3f91f8b</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>