Constant speed

Holds the flange at a constant speed.

  • rotational
  • Modelica Standard Library
  • 1 port
  • 1 parameter
BlockConstant speedKindconstantSpeedLibraryRotational

Description

Holds the flange at a constant angular velocity, independent of the torque needed.

Example

Resolver and Hall sensor A shaft turning at 10 rad/s read by a resolver, a Hall sensor, and an angle sensor.

Shaft 10 rad/sResolverHall sensorShaft angle
In Gradara, select a Constant speed block and press F1, then choose Open example. It opens as a new model in My models, ready to run.

Also in this example:Angle sensorElectrical angle sensorResolver

Ports

Conserving terminals 1

  • shaftflangerotational

    Driven flange.

Parameters

  • Speedw_fixed100 rad/s

    The angular velocity, in rad/s.

Equations

Modelica
d(flange.phi)/dt = w_fixed

Implementation

Modelica Standard Library 4.1.0Modelica.Mechanics.Rotational.Sources.ConstantSpeed
MSL documentation

Assumptions and limitations

  • The speed is imposed from the first instant, so any inertia rigidly attached to the flange cannot have its own initial speed.

See also

Select a block in Gradara and press F1 to open its page offline.