/SENSOR/ACCE
Block Format Keyword Describes the sensors used to activate or deactivate an object according to accelerometer.
Format
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/SENSOR/ACCE/sens_ID/unit_ID  
sens_title  
T_{delay}  
N_{acc} 
(1)  (2)  (3)  (4)  (5)  (6)  (7)  (8)  (9)  (10) 

accel_ID  Dir  Γ_{min}  T_{min} 
Definition
Field  Contents  SI Unit Example 

sens_ID  Sensor
identifier. (Integer, maximum 10 digits) 

unit_ID  Optional unit
identifier. (Integer, maximum 10 digits) 

sens_title  Sensor
title. (Character, maximum 100 characters) 

T_{delay}  Time
delay. (Real) 
$\left[\text{s}\right]$ 
N_{acc}  Number of
accelerometers (N_{acc} ≤
6). (Integer) 

accel_ID  Accelerometer
identifier. (Integer) 

Dir  Direction. 4 (Text) 

Γ_{min}  Minimum absolute value
of acceleration. (Real) 
$\left[\frac{\text{m}}{{\text{s}}^{2}}\right]$ 
T_{min}  Minimum time duration
before activation when criteria is reached. 3 (Real) 
$\left[\text{s}\right]$ 
Comments
 Sensors can be used to activate airbags, imposed forces, pressures, and fixed velocities.
 Sensors can be used to activate or deactivate these elements: brick, quad, shell, truss, beam, spring or 3N Shell with /ACTIV.
 Sensor is activated (at T_{sensor}) if one of the accelerometers gives an
acceleration greater than Γ_{min} during a time greater than T_{min}:
T_{sensor} = T_{delay} + T_{min}
with, T_{min} (time when the criteria is reached).
 Dir defines
the acceleration direction:
 X
 X direction
 Y
 Y direction
 Z
 Z direction
 XY
 XY plane $\left(\sqrt{{\gamma}_{x}^{2}+{\gamma}_{y}^{2}}\right)$
 YZ
 YZ plane $\left(\sqrt{{\gamma}_{y}^{2}+{\gamma}_{z}^{2}}\right)$
 ZX
 ZX plane $\left(\sqrt{{\gamma}_{z}^{2}+{\gamma}_{x}^{2}}\right)$
 XYZ
 total acceleration $\left(\sqrt{{\gamma}_{x}^{2}+{\gamma}_{y}^{2}+}{\gamma}_{z}^{2}\right)$