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MapleSim Hydraulics Library from Modelon

command_diameter_3_2_PAB  Interface for a 3-port, 2-position spool

Interface Class used to calculate the commanded diameter for spools with three ports and two positions.

 

Equations

Variables

Connections

Parameters

Equations

dPA=noEvent1spoolposition<12034spoolposition34spoolpositionotherwiseotherwise&comma;dPB=noEvent112<spoolposition0spoolposition141+4spoolpositionotherwiseotherwisereduceEventsdPA=1spoolposition<12034spoolposition34spoolpositionotherwiseotherwise&comma;dPB=112<spoolposition0spoolposition141+4spoolpositionotherwiseotherwiseotherwise

Phyd&equals;noEventportflowportpressure

flowreduction&equals;smooth0&comma;noEvent1Phyd<Pmax1coeffPPhydPmaxPmaxotherwise

morPAdiam&equals;dPAdPAmaxflowreduction&plus;dleak

morPBdiam&equals;dPBdPBmaxflowreduction&plus;dleak

Variables

Name

Value

Units

Description

Modelica ID

dPA

 

m

 

d_P_A

dPB

 

m

 

d_P_B

Phyd

 

W

Hydraulic power

P_hyd

Connections

Name

Description

Modelica ID

spoolposition

 

spool_position

portflow

 

port_flow

portpressure

 

port_pressure

flowreduction

 

flow_reduction

morPAdiam

 

mor_P_A_commandedDiameter

morPBdiam

 

mor_P_B_commandedDiameter

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

Pmax

1.26·105

W

Max. hydraulic power

P_max

coeffP

10

 

Influence of hydraulic power on flow rate

coeff_P

dPAmax

 

m

 

dmax_P_A

dPBmax

 

m

 

dmax_P_B

dleak

1.67·10-5

m

Diameter of equivalent orifice to model leakage of closed valve

dleak

Advanced Parameters

Name

Default

Units

Description

Modelica ID

reduce events

true

 

If true, reduce event generation

reduceEvents

See Also

DirectionalControl

MapleSim Hydraulics Library from Modelon Overview

 


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