Absolute Translational Motion Sensor
Motion sensor in mechanical progressive systems.
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Description
The Translational Motion Sensor unit is a mechanical translational motion sensor, i.e. a device which, when connected between two mechanical translational motion units, generates a signal proportional to acceleration, velocity or position. The initial position value (offset) can be set as a block parameter.
The R and C connections are mechanical progressive ports that connect the block to the nodes between which motion is measured. The positive direction of the block is from port R to port C. This means that velocity is measured as , where are the absolute velocities at the R and C ports respectively. The Measurement type parameter allows to disable the C port and make measurements relative to ground.
Connections A, V and P are the acceleration, velocity and position output ports respectively. The visibility of these ports is controlled by the block parameters. If you enable port A, the block performs additional calculations to measure acceleration based on velocity. To avoid complicating the model, it is recommended to enable only those ports that are actually used for measurement.
Ports
Output
A - acceleration, m/s²
scalar
Acceleration output port.
Dependencies
To use this port, set Acceleration to `On'.
V - speed, m/s
scalar
Speed output port.
Dependencies
To use this port, set Velocity to `On'.
P - position, m
scalar
Position output port.
Dependencies
To use this port, set Position to `On'.
Non-directional
R - rod (positive connection)
translational mechanics
Mechanical progressive port corresponding to the positive connection of the transducer.
C - housing (negative connection)
` translational mechanics`.
Mechanical progressive port corresponding to the negative connection of the sensor.
Dependencies
To use this port, set the Measurement type parameter to `Relative'.
Parameters
Measurement type - choice between absolute and relative measurements
Absolute (by default) | Relative
Select between absolute and relative measurements:
-
Relative- measuring acceleration, velocity and position of port R relative to port C. -
Absolute- disable the C port and measure the acceleration, velocity and position of the R port relative to the ground (internal reference node).
Acceleration - switch on the output port for acceleration measurement
Disabled (by default) | Enabled
Checking this box enables the A output port to measure acceleration. Opening the A port also requires additional calculations to measure acceleration based on velocity, so this port is disabled by default.
Velocity - Enable the output port for velocity measurement
On (By default) | Disabled.
When this checkbox is selected, the V output port is enabled to measure velocity.
Position - enables the output port for position measurement
On (By default) | Off.
When this checkbox is selected, the P output port for position measurement is enabled.
Initial position - initial position of the sensor
`0 (By default)
Initial position of the sensor (offset).
Dependencies
This parameter is used when Position is set to `On'.