WOLFRAM SYSTEM MODELER

CoupledClutches

Drive train with 3 dynamically coupled clutches

Diagram

Wolfram Language

In[1]:=
SystemModel["Modelica.Mechanics.Rotational.Examples.CoupledClutches"]
Out[1]:=

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

This example demonstrates how variable structure drive trains are handled. The drive train consists of 4 inertias and 3 clutches, where the clutches are controlled by input signals. The system has 2^3=8 different configurations and 3^3 = 27 different states (every clutch may be in forward sliding, backward sliding or locked mode when the relative angular velocity is zero). By invoking the clutches at different time instances, the switching of the configurations can be studied.

Simulate the system for 1.2 seconds with the following initial values:
J1.w = 10.

Plot the following variables:
angular velocities of inertias (J1.w, J2.w, J3.w, J4.w), frictional torques of clutches (clutchX.tau), frictional mode of clutches (clutchX.mode) where mode = -1/0/+1 means backward sliding, locked, forward sliding.

Parameters (3)

f

Value: 0.2

Type: Frequency (Hz)

Description: Frequency of sine function to invoke clutch1

T2

Value: 0.4

Type: Time (s)

Description: Time when clutch2 is invoked

T3

Value: 0.9

Type: Time (s)

Description: Time when clutch3 is invoked

Components (13)

J1

Type: Inertia

Description: 1D-rotational component with inertia

torque

Type: Torque

Description: Input signal acting as external torque on a flange

clutch1

Type: Clutch

Description: Clutch based on Coulomb friction

sin1

Type: Sine

Description: Generate sine signal

step1

Type: Step

Description: Generate step signal of type Real

J2

Type: Inertia

Description: 1D-rotational component with inertia

clutch2

Type: Clutch

Description: Clutch based on Coulomb friction

J3

Type: Inertia

Description: 1D-rotational component with inertia

clutch3

Type: Clutch

Description: Clutch based on Coulomb friction

J4

Type: Inertia

Description: 1D-rotational component with inertia

sin2

Type: Sine

Description: Generate sine signal

step2

Type: Step

Description: Generate step signal of type Real

fixed

Type: Fixed

Description: Flange fixed in housing at a given angle