twotwowayproportionalvalve-states

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twotwowayproportionalvalve-states

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Iconic Diagrams\Hydraulics\Valves

Use

Domains: Continuous. Size: 1-D. Kind: Iconic Diagrams (Hydraulics).

Description

TwoTwoWayProportionalValve-States

This model describes a 2/2-way proportional control valve with second order spool dynamics and lumped volumes. The flow through the valve is described as laminar/turbulent flow through an orifice. A detailed description of the valve can be found in TwoTwoWayProportionalValve.htm.

Interface

Ports

Description

pa, pb

Both terminals of the valve.

Causality

 

preferred effort out pa

preferred effort out pb

 

Inputs

 

spoolpos

position of the spool valve: 0 =closed, 1 = open

0 <= spoolpos <= 1

Parameters

 

TwoTwoWayDirectionalValve\rho

TwoTwoWayDirectionalValve\GLeak

TwoTwoWayDirectionalValve\Amax

TwoTwoWayDirectionalValve\Cd

TwoTwoWayDirectionalValve\overlap

TwoTwoWayDirectionalValve\f

TwoTwoWayDirectionalValve\d

Va\V

Va\B

Va\p_initial

Vb\V

Vb\B

Vb\p_initial

Mass density of the fluid [kg/m3].

Conductance of the laminar leakage flow [m3/s.Pa], GLeak >= 0.

Maximum spool valve area when the valve is open [m2], Amax > 0.

Discharge coefficient [], Cd > 0.

The valve overlap in closed position [], -1 < overlap < 1.

Bandwidth of the spool dynamics [Hz], f > 0.

Damping of the spool dynamics [], d > 0.

Volume of oil under pressure [m3]

Effective bulk modulus [Pa]

The starting pressure of the volume [Pa]

Volume of oil under pressure [m3]

Effective bulk modulus [Pa]

The starting pressure of the volume [Pa]