24.13.1. Speed Sensor

The speed sensor has a mother body, a center position, a direction, and a range.

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Figure 24.107 Speed Sensor

First, the sensor finds the closest a segment (or shell element) of sheet from the sensor center position. And a position of the segment (or shell 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 segment (or shell element) is computed and the sensor output is computed. As shown in Figure 24.107, if a sheet body 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.

24.13.1.1. 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.

  • 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.

24.13.1.2. Properties

The properties dialog box of the Speed Sensor has two tabs.

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Figure 24.108 Speed Sensor property page

  • Mother Body: Defines the body on which the Speed Sensor is fixed.

  • Sensed Entity: Defines the sensed entity by the Speed Sensor of MTT2D.

    • If MTT2DAssembly is set, all sheets defined in the assembly become a sensing target.

    • If a sheet body is set, only the sheet becomes a sensing target.

  • Position: Defines the center point of Speed Sensor. The user can input this value as the Parametric Point.

  • Direction: Defines the direction of Speed Sensor. The user can input this value as the Parametric Point.

  • Range: Defines the detecting range of Speed Sensor. The user can input this value as the Parametric Value.

  • Color: Allows selecting the graphic color of Speed Sensor.