WOLFRAM SYSTEM MODELER
DCVM43FloatingCenterMechanically actuated proportional valve with four ports and three states |
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Diagram
Wolfram Language
In[1]:=
SystemModel["Hydraulic.Valves.DirectionalControl.MechanicalActuation.DCVM43FloatingCenter"]
Out[1]:=
Information
This is a model of a control valve with four ports and three states. The valve has a tank port t, a pressure port p, and two load ports a and b. The insignal, u, to the spool is the force on the mechanical flange. The valve is controlled by a mechanical spool with dynamics; see SpoolM.
This valve is similar to DCVM43ClosedCenter; the only difference is the middle state. In this model, ports T-A-B are connected in the middle state. In the figure below, u is the force.
Control valve with four ports and three states
This valve is similar to DCVM43ClosedCenter; the only difference is the middle state. In this model, ports T-A-B are connected in the middle state. In the figure below, u is the force.
Control valve with four ports and three states
Implementation
This valve basically consists of orifices controlled by a spool.Parameters (10)
| medium |
Value: Oil() Type: Medium Description: Medium in the component |
|---|---|
| V |
Value: 0.0001 Type: Volume (m³) Description: Volume of control valve |
| Gleak |
Value: 1e-020 Type: PressureDependentLeakage (m³/(s⋅Pa)) Description: Leakage between orifices |
| overlap |
Value: 0 Type: Length (m) Description: Spool overlap, a number between -1 and 1; 0 if no overlap |
| AMax |
Value: 0.001 Type: Area (m²) Description: Maximum opening area |
| Cd |
Value: 0.62 Type: Real Description: Coefficient of discharge for the opening |
| L |
Value: 2 Type: Length (m) Description: Valve length |
| x0 |
Value: -1 Type: Position (m) Description: Minimum valve position |
| f |
Value: 80 Type: Frequency (Hz) Description: Spool resonance frequency |
| d |
Value: 0.9 Type: Damping (s⁻¹) Description: Spool damping |
Connectors (5)
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port_p |
Type: Port_a Description: Port for hydraulic fluid (filled icon) |
|---|---|---|
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port_t |
Type: Port_a Description: Port for hydraulic fluid (filled icon) |
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port_b |
Type: Port_b Description: Port for hydraulic fluid (unfilled icon) |
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port_a |
Type: Port_b Description: Port for hydraulic fluid (unfilled icon) |
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flange |
Type: Flange_a Description: One-dimensional translational flange (left, flange axis directed INTO cut plane) |
Components (12)
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medium |
Type: Medium Description: Medium in the component |
|---|---|---|
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volume_a |
Type: Volume Description: Fixed volume with fluid storage |
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volume_b |
Type: Volume Description: Fixed volume with fluid storage |
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volume_t |
Type: Volume Description: Fixed volume with fluid storage |
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volume_p |
Type: Volume Description: Fixed volume with fluid storage |
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rightState |
Type: CrossOver4Port Description: Basic building block for directional control valves |
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leftState |
Type: Straight4Port Description: Basic building block for directional control valves |
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middleState |
Type: Floating4Port Description: Basic building block for directional control valves |
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abs1 |
Type: Abs Description: Output the absolute value of the input |
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add1 |
Type: Add Description: Output the sum of the two inputs |
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const |
Type: Constant Description: Generate constant signal of type Real |
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spoolWM |
Type: SpoolM Description: Model of a mechanic spool |