WOLFRAM SYSTEM MODELER

SpoolH

Model of a hydraulic spool

Diagram

Wolfram Language

In[1]:=
SystemModel["Hydraulic.Utilities.SpoolH"]
Out[1]:=

Information

This is a model of a hydraulic spool. It has two input pressure signals, and y is the current spool opening.


Normalization of the characteristic curve

The opening of the valve depends on the pressure difference, dP, between the two input pressure signals. The parameter pOpen defines the pressure difference when the valve starts to open, and the parameter pSwitch defines the pressure at which the valve is fully open. The dynamics of the spool are a first-order system with the time constant t1.

Parameters (5)

pOpen

Value: 10000.0

Type: Pressure (Pa)

Description: Opening pressure

pSwitch

Value: 500000.0

Type: Pressure (Pa)

Description: Switching pressure

t1

Value: 0.1

Type: Time (s)

Description: Time constant for first-order system

yMax

Value: 1

Type: Real

Description: Upper limit for output value

yMin

Value: -1

Type: Real

Description: Lower limit for output value

Connectors (3)

y

Type: RealOutput

Description: 'output Real' as connector

port_b

Type: Port_b

Description: Port for hydraulic fluid (unfilled icon)

port_a

Type: Port_a

Description: Port for hydraulic fluid (filled icon)

Components (11)

const

Type: Constant

Description: Generate constant signal of type Real

limiter2

Type: Limiter

Description: Limit the range of a signal

firstOrder

Type: FirstOrder

Description: First order transfer function block (= 1 pole)

limiter1

Type: Limiter

Description: Limit the range of a signal

division

Type: Division

Description: Output first input divided by second input

add

Type: Add

Description: Output the sum of the two inputs

pressure_b

Type: PressureSensor

Description: Sensor measuring absolute pressure

pressure_a

Type: PressureSensor

Description: Sensor measuring absolute pressure

deadZone

Type: DeadZone

Description: Provide a region of zero output

gain1

Type: Gain

Description: Output the product of a gain value with the input signal

gain2

Type: Gain

Description: Output the product of a gain value with the input signal

Used in Components (15)

CheckValve

Hydraulic.Valves.DirectionalControl.Internal

Static check valve

DCVH22

Hydraulic.Valves.DirectionalControl.HydraulicActuation

Hydraulically actuated proportional valve with two ports and two states

DCVH32

Hydraulic.Valves.DirectionalControl.HydraulicActuation

Hydraulically actuated proportional valve with three ports and two states

DCVH33

Hydraulic.Valves.DirectionalControl.HydraulicActuation

Hydraulically actuated proportional control valve with three ports and three states

DCVH42

Hydraulic.Valves.DirectionalControl.HydraulicActuation

Hydraulically actuated proportional control valve with four ports and two states

DCVH43ClosedCenter

Hydraulic.Valves.DirectionalControl.HydraulicActuation

Hydraulically actuated proportional control valve with four ports and three states

DCVH43DiagonalCenter

Hydraulic.Valves.DirectionalControl.HydraulicActuation

Hydraulically actuated proportional control valve with four ports and three states

DCVH43FloatingCenter

Hydraulic.Valves.DirectionalControl.HydraulicActuation

Hydraulically actuated proportional control valve with four ports and three states

DCVH43OpenCenter

Hydraulic.Valves.DirectionalControl.HydraulicActuation

Hydraulically actuated proportional control valve with four ports and three states

DCVH43TandemCenter

Hydraulic.Valves.DirectionalControl.HydraulicActuation

Hydraulically actuated proportional control valve with four ports and three states

DCVH63

Hydraulic.Valves.DirectionalControl.HydraulicActuation

Hydraulically actuated proportional control valve with four ports and three states

PressureReliefValve

Hydraulic.Valves.PressureControl.Internal

Static pressure relief valve

PressureReducingValve

Hydraulic.Valves.PressureControl.Internal

Static pressure reducing valve

PressureCompensatingValveNormallyOpen

Hydraulic.Valves.PressureControl.Internal

Static pressure compensating valve

PressureCompensatingValveNormallyClosed

Hydraulic.Valves.PressureControl.Internal

Static pressure compensating valve