Fixed (rotational)

A flange fixed in the housing at a constant angle.

  • rotational
  • Modelica Standard Library
  • 1 port
  • 1 parameter
BlockFixed (rotational)KindrotFixedLibraryRotational

Description

Fixes a rotational flange to the housing at a constant angle. Use it as the reference for springs, dampers, and clutches that act against the housing.

Example

Rotational drivetrain A torque step drives a motor inertia through a 2:1 gear and a shaft spring into a damped load, with every rotational sensor.

Torque 1 N·mMotor 0.01 kg·m²Gear 2:1Shaft powerShaft torqueShaft 1000 N·m/radLoad 0.04 kg·m²Friction 0.1FrameMotor accelerationShaft twist rateLoad speed
In Gradara, select a Fixed (rotational) block and press F1, then choose Open example. It opens as a new model in My models, ready to run.

Also in this example:Torque sensorTorsion springTorsion damperInertia (ideal)Ideal gearTorque stepSpeed sensor (ideal)Acceleration sensorPower sensor (rotational)Relative speed sensor

Ports

Conserving terminals 1

  • shaftflangerotational

    Flange held at the fixed angle. It takes whatever reaction torque is needed.

Parameters

  • Anglephi00 rad

    The fixed angle, in radians.

Equations

Modelica
flange.phi = phi0

Implementation

Modelica Standard Library 4.1.0Modelica.Mechanics.Rotational.Components.Fixed
MSL documentation

See also

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