26.8.1. Speed Sensor

This sensor allows the user to measure the velocity of assembly (web) in the sensor.

The speed sensor measures the velocity of assembly (web) through the following steps.

The speed sensor finds the closest a beam element of assembly (web) from the sensor center position.
A position of the beam element is checked whether the position is in the range of sensor.
If the position is in the sensor, the velocity of the closest position of the beam element is computed and the sensor output is computed. As shown in Figure 26.41, if a beam assembly passes to the range of the sensor, the sensor output can be computed from the following equation.

\({{V}_{o}}=f_{s}^{T}({{V}_{c}}-{{V}_{s}})\)

where,

\({{V}_{o}}\): the result of sensor.

\({{V}_{c}}\): the velocity of the closest position of sheet segment (or shell element) in the range of the sensor.

\({{V}_{s}}\): the velocity for the center position of sensor.

\({{f}_{s}}\): the specified direction of the sensor.

26.8.1.1. Modeling Options

The user can create a speed sensor as follows.

Point, Direction, Distance
- Point: Selects a point on a body to define the center of speed sensor.
- Direction: Defines a direction of speed sensor.
- Distance: Defines a range of region to measure output.
- Note: The user should define the sensing target entity by using Speed Sensor property page.
Body, Point, Direction, Distance
- Body: Selects a body to define the parent body of speed sensor.
- Point: Selects a point on a body to define the center of speed sensor.
- Direction: Defines a direction of speed sensor.
- Distance: Defines a range of region to measure output.
- Note: The user should define the sensing target entity by using Speed Sensor property page.
Assembled Body, Point, Direction, Distance
- Assembled Body: Selects a beam assembly as a target entity.
- Point: Selects a point on a body to define the center of speed sensor.
- Direction: Defines a direction of speed sensor.
- Distance: Defines a range of region to measure output.
Body, Assembled Body, Point, Direction, Distance
- Body: Selects a body to define the parent body of speed sensor.
- Assembled Body: Selects a beam assembly as a target entity.
- Point: Selects a point on a body to define the center of speed sensor.
- Direction: Defines a direction of speed sensor.
- Distance: Defines a range of region to measure output.

The user can modify properties for the speed sensor such as a position, sensing target entity, and direction using Speed Sensor property page.