WOLFRAM SYSTEM MODELER
SimpleGearShiftSimple Gearshift |
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Diagram
Wolfram Language
In[1]:=
SystemModel["Modelica.Mechanics.Rotational.Examples.SimpleGearShift"]
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
This model shows how an automatic gear shift is built up from a planetary gear, a brake and a clutch.
- In the beginning, the clutch is free and the brake fixes the ring of the planetary. Thus we obtain a gearRatio = 1/(1 + planetary.ratio).
- At time = 2 s, the brake frees the ring of the planetary, whereas the clutch blocks the ring and the sun. Thus we obtain a gearRatio = 1.
Outputs (3)
| wEngine |
Default Value: engine.w Type: AngularVelocity (rad/s) Description: Speed of engine |
|---|---|
| wLoad |
Default Value: load.w Type: AngularVelocity (rad/s) Description: Speed of load |
| gearRatio |
Default Value: wLoad / max(wEngine, 1E-6) Type: Real Description: Gear ratio load/engine |
Components (10)
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torqueStep |
Type: TorqueStep Description: Constant torque, not dependent on speed |
|---|---|---|
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engine |
Type: Inertia Description: 1D-rotational component with inertia |
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idealPlanetary |
Type: IdealPlanetary Description: Ideal planetary gear box |
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load |
Type: Inertia Description: 1D-rotational component with inertia |
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quadraticSpeedDependentTorque |
Type: QuadraticSpeedDependentTorque Description: Quadratic dependency of torque versus speed |
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clutch |
Type: Clutch Description: Clutch based on Coulomb friction |
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brake |
Type: Brake Description: Brake based on Coulomb friction |
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feedback |
Type: Feedback Description: Output difference between commanded and feedback input |
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const1 |
Type: Constant Description: Generate constant signal of type Real |
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ramp |
Type: Ramp Description: Generate ramp signal |