Motion sensor in mechanical rotational systems
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 = ωR – ωC, where ωR, ωC are the absolute angular velocities at ports R and C, respectively.
Sensor initial angle, or offset (rad). The default value is
The block has the following ports:
Mechanical rotational conserving port associated with the sensor positive probe.
Mechanical rotational conserving port associated with the sensor negative (reference) probe.
Physical signal output port for angular velocity.
Physical signal output port for angular displacement.