WOLFRAM SYSTEM MODELER
CylinderDoubleFrictionSame as CylinderDouble but with more friction types added, like Stribeck friction. This model also has external leakage. |
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Diagram
Wolfram Language
In[1]:=
SystemModel["Hydraulic.Cylinders.CylinderDoubleFriction"]
Out[1]:=
Information
This is a model of a double acting cylinder with mass, friction, and internal and external leakage. See Chamber for a description of the cylinder chambers.
Reference
C. Nordling and J. Österman, Physics Handbook for Science and Engineering, 7th ed., Lund, Sweden: Studentlitteratur, 2004 p. 183.Parameters (26)
| medium |
Value: Oil() Type: Medium Description: Medium in the component |
|---|---|
| useSupport |
Value: false Type: Boolean Description: = true, if support flange enabled, otherwise implicitly grounded |
| GLeak |
Value: 1e-020 Type: PressureDependentLeakage (m³/(s⋅Pa)) Description: Leakage between cylinders |
| cWall |
Value: 10000000.0 Type: TranslationalSpringConstant (N/m) Description: Spring constant for cylinder wall |
| dWall |
Value: 10000000.0 Type: TranslationalDampingConstant (N⋅s/m) Description: Damping constant for cylinder wall |
| diameterRod_a |
Value: 0.0036 Type: Diameter (m) Description: Diameter of rod at left side (a) |
| diameterRod_b |
Value: diameterRod_a Type: Diameter (m) Description: Diameter of rod at right side (b) |
| diameterPiston |
Value: 0.1 Type: Diameter (m) Description: Diameter of piston |
| lengthHousing |
Value: 0.5 Type: Length (m) Description: Total length of cylinder |
| lengthPiston |
Value: 0.05 Type: Length (m) Description: Length of piston |
| lengthRod_a |
Value: 0.5 Type: Length (m) Description: Length of left rod (a) |
| lengthRod_b |
Value: lengthRod_a Type: Length (m) Description: Length of right rod (b) |
| mPiston |
Value: densityPiston * lengthPiston * pi * (diameterPiston / 2) ^ 2 Type: Mass (kg) Description: Mass of piston |
| pStart_a |
Value: 0 Type: Pressure (Pa) Description: Start pressure for left side of piston (a) |
| pStart_b |
Value: pStart_a Type: Pressure (Pa) Description: Start pressure for right side of piston (b) |
| lengthWall |
Value: 0 Type: Length (m) Description: Length of spring effect of wall |
| sStart |
Value: lengthHousing / 2 Type: Position (m) Description: Start position of piston |
| vStart |
Value: 0 Type: Velocity (m/s) Description: Start velocity of piston |
| Vdead_a |
Value: 0.005 * (lengthHousing - lengthPiston - lengthWall) / 2 * pi * (diameterPiston / 2) ^ 2 Type: Volume (m³) Description: Dead volume for left part (a) |
| Vdead_b |
Value: Vdead_a Type: Volume (m³) Description: Dead volume for right part (b) |
| F_viscous |
Value: 10000 Type: ViscousDependentFriction (N/(m/s)) Description: Piston friction: Viscous dependent friction |
| F_Coulomb |
Value: 5 Type: Force (N) Description: Piston friction: Constant friction (Coulomb force) |
| F_Stribeck |
Value: 10 Type: Force (N) Description: Piston friction: Stribeck effect |
| f_hyd |
Value: 1e-006 Type: PressureDependentFriction (N/Pa) Description: Coefficient for pressure dependent friction |
| fexp |
Value: 0 Type: ExponentialFrictionDecay (1/(m/s)) Description: Piston friction: Exponential decay |
| densityPiston |
Value: 7800.0 Type: Density (kg/m³) Description: Density of pistion |
Connectors (7)
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flange_a |
Type: Flange_a Description: (left) driving flange (flange axis directed into cut plane, e. g. from left to right) |
|---|---|---|
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flange_b |
Type: Flange_b Description: (right) driven flange (flange axis directed out of cut plane) |
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support |
Type: Support Description: Support/housing of component |
|
internalSupport |
Type: Support Description: Internal support/housing of component (either connected to support, if useSupport=true, or connected to fixed, if useSupport=false) |
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port_a |
Type: Port_a Description: Port for hydraulic fluid (filled icon) |
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port_b |
Type: Port_a Description: Port for hydraulic fluid (filled icon) |
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port_externalLeakage |
Type: Port_b Description: Port for hydraulic fluid (unfilled icon) |
Components (14)
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medium |
Type: Medium Description: Medium in the component |
|---|---|---|
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fixed |
Type: Fixed Description: Fixed support/housing, if not useSupport |
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housing |
Type: Rod Description: Rod without inertia |
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chamber_b |
Type: Cylinder Description: Cylinder chamber |
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elastoGap_a |
Type: ElastoGap Description: 1D translational spring damper combination with gap |
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elastoGap_b |
Type: ElastoGap Description: 1D translational spring damper combination with gap |
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rod_a |
Type: Rod Description: Rod without inertia |
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rod_b |
Type: Rod Description: Rod without inertia |
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chamber_a |
Type: Cylinder Description: Cylinder chamber |
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piston |
Type: MassWithStopAndFriction Description: Sliding mass with hard stop and Stribeck friction |
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externalLeakage_a |
Type: RestrictionLaminar Description: Laminar restriction using conductance |
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externalLeakage_b |
Type: RestrictionLaminar Description: Laminar restriction using conductance |
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internalLeakage |
Type: RestrictionLaminar Description: Laminar restriction using conductance |
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pressureDependantFriction |
Type: PressureDependentFriction Description: Model of pressure dependent friction, used in cylinder models |
Used in Components (1)
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Hydraulic.Cylinders Same as CylinderDoubleFriction but with springs that move the cylinder back to the center position |