WOLFRAM SYSTEM MODELER
DCVM33Mechanically actuated proportional valve with three ports and three states |
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Diagram
Wolfram Language
In[1]:=
SystemModel["Hydraulic.Valves.DirectionalControl.MechanicalActuation.DCVM33"]
Out[1]:=
Information
This is a model of a control valve with three ports and three states. The valve has a tank port t, a pressure port p, and a load port a. 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.
Control valve with three ports and three states
Valve at center position, u = 0; there is only leakage flow between the ports if there is no overlap
Valve at right position, u = -1; there is flow from a to t
Valve at left position, u = 1; there is flow from p to a
Control valve with three ports and three states
Valve at center position, u = 0; there is only leakage flow between the ports if there is no overlap
Valve at right position, u = -1; there is flow from a to t
Valve at left position, u = 1; there is flow from p to a
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 (4)
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port_a |
Type: Port_b Description: Port for hydraulic fluid (unfilled icon) |
|---|---|---|
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port_t |
Type: Port_a Description: Port for hydraulic fluid (filled icon) |
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port_p |
Type: Port_a Description: Port for hydraulic fluid (filled icon) |
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flange |
Type: Flange_a Description: One-dimensional translational flange (left, flange axis directed INTO cut plane) |
Components (8)
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medium |
Type: Medium Description: Medium in the component |
|---|---|---|
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flow_at |
Type: ControlledOrifice Description: Controlled restriction |
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flow_pa |
Type: ControlledOrifice Description: Controlled restriction |
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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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volume_a |
Type: Volume Description: Fixed volume with fluid storage |
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gain1 |
Type: Gain Description: Output the product of a gain value with the input signal |
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spoolWM |
Type: SpoolM Description: Model of a mechanic spool |