.. _auto_curve_g_to_vel:

*CONVERT GS TO VELOCITY*
========================

Integrates an acceleration curve (in g-units) over time to produce a velocity curve. Accepts an optional initial velocity and time-scale factor, and outputs the result in the requested velocity unit (mph, km/h, or mm/s). Use this worker whenever a g-channel time-history needs to be converted to a velocity trace for crash or dynamics post-processing.

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

Classification: **process**.

Tagged: ``acceleration``, ``crash``, ``g_to_vel``, ``integration``, ``time_history``, ``unit_conversion``, ``velocity``.

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); the x-axis is expected to be time in seconds and the y-axis in g (9.81 m/s²); this is the primary curve to be integrated.
   * - Velocity Unit
     - velocity_unit
     - scalar
     - mph
     - 
     - Target unit for the output velocity curve; choose from 'mph' (miles per hour), 'kmph' (kilometres per hour), or 'mmps' (millimetres per second); defaults to 'mph'.
   * - Initial Velocity
     - initial_velocity
     - text
     - 1.0
     - 
     - Initial velocity value (in the selected velocity unit) used as the constant of integration; set to 0.0 for a vehicle starting from rest or supply the known pre-event speed; defaults to 1.0.
   * - Time Scale Factor
     - time_scalefactor
     - text
     - 1.0
     - 
     - Multiplicative scale factor applied to the time axis of the input curve before integration, e.g. 1000.0 to convert milliseconds to seconds; leave at default 1.0 when the time axis is already in seconds.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_g_to_vel_output_1
     - curve_g_to_vel_output_1
     - vector
     - Integrated velocity time-history curve in the requested unit (mph / kmph / mmps), with the same time axis (after any scaling) as the input acceleration curve.

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_vel <https://www.d3view.com/api/workflow/example?id=curve_g_to_vel>`_

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_g_to_vel</code>. Schema hash: <code>55905beb6d1e</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>