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Ideal Rotational Motion Sensor

Motion sensor in mechanical rotational systems

  • Library:
  • Simscape / Foundation Library / Mechanical / Mechanical Sensors


The Ideal Rotational Motion Sensor block represents an ideal mechanical rotational motion sensor, that is, a device that converts an across variable measured between two mechanical rotational nodes into a control signal proportional to angular velocity or angle. You can specify the initial angular position (offset) as a block parameter.

The sensor is ideal since it does not account for inertia, friction, delays, energy consumption, and so on.

Connections R and C are mechanical rotational conserving ports that connect the block to the nodes whose motion is being monitored. Connections W and A are physical signal output ports for velocity and angular displacement, respectively.

The block positive direction is from port R to port C. This means that the velocity is measured as ω = ωRωC, where ωR, ωC are the absolute angular velocities at ports R and C, respectively.



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Physical signal output port for angular velocity.

Physical signal output port for angular displacement.


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Mechanical rotational conserving port associated with the sensor positive probe.

Mechanical rotational conserving port associated with the sensor negative (reference) probe.


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Sensor initial angular position (offset).

Introduced in R2007a

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