WOLFRAM SYSTEM MODELER

DCVE43TandemCenter

Electrically actuated proportional control valve with four ports and three states

Diagram

Wolfram Language

In[1]:=
SystemModel["Hydraulic.Valves.DirectionalControl.ConventionalSolenoidActuation.DCVE43TandemCenter"]
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 insignals to the spools are u1 and u2. The valve is controlled by two electrical spools with dynamics; see SpoolE2Windings.

This valve is similar to DCVE43ClosedCenter; the only difference is the middle state. In this model, ports P-T are connected in the middle state. In the figure below, u = u1 - u2.
Control valve with four ports and three states

Implementation

This valve basically consists of orifices controlled by a spool.

Parameters (9)

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

Un

Value: 1

Type: Voltage (V)

Description: Spool nominal voltage

d

Value: 0.9

Type: Damping (s⁻¹)

Description: Spool damping

f

Value: 80

Type: Frequency (Hz)

Description: Spool resonance frequency

Connectors (6)

port_p

Type: Port_a

Description: Port for hydraulic fluid (filled icon)

port_t

Type: Port_a

Description: Port for hydraulic fluid (filled icon)

port_b

Type: Port_b

Description: Port for hydraulic fluid (unfilled icon)

port_a

Type: Port_b

Description: Port for hydraulic fluid (unfilled icon)

u1

Type: RealInput

Description: 'input Real' as connector

u2

Type: RealInput

Description: 'input Real' as connector

Components (13)

medium

Type: Medium

Description: Medium in the component

volume_a

Type: Volume

Description: Fixed volume with fluid storage

volume_b

Type: Volume

Description: Fixed volume with fluid storage

volume_t

Type: Volume

Description: Fixed volume with fluid storage

volume_p

Type: Volume

Description: Fixed volume with fluid storage

rightState

Type: CrossOver4Port

Description: Basic building block for directional control valves

leftState

Type: Straight4Port

Description: Basic building block for directional control valves

middleState

Type: Tandem4Port

Description: Basic building block for directional control valves

abs1

Type: Abs

Description: Output the absolute value of the input

add1

Type: Add

Description: Output the sum of the two inputs

const

Type: Constant

Description: Generate constant signal of type Real

spool

Type: SpoolE2Windings

Description: An electrical spool with second-order characteristics

add

Type: Add

Description: Output the sum of the two inputs

Used in Examples (3)

SubCircuitWithReducedPressure

Hydraulic.Examples.MultipleActuators

Example circuit with a sub-circuit operating at a reduced pressure

SequenceCircuit1

Hydraulic.Examples.MultipleActuators

Example circuit with two cylinders working in a sequence

SequenceCircuit2

Hydraulic.Examples.MultipleActuators

Example circuit with two cylinders working in a sequence