Modelon’s Hydraulics Library is valuable for all industries that develop hydraulic components and applications, including automotive, aerospace and industrial equipment. The Hydraulics Library provides models of pumps, motors and cylinders, restrictions and valves, hydraulic lines, lumped volumes and sensors. No special components for splits or mergers are required — users connect hydraulic components by simply drawing connection lines, making it easy to model non-standard configurations and component designs.

1. ©2019 Modelon.
HYDRAULICS LIBRARY
Overview

2. AGENDA
2©2019 Modelon
 About Hydraulics Library
 Key Benefits
 Key Capabilities
 Key Applications
 Library Contents
 Modelon Compatibility
 Latest Release: 2019.2

3. • Modelica library for hydraulic systems
• High pressure (up to several hundred bar)
• Compressible flow
• Optional ThermoHydraulics
• Components
• Most models needed for fluid power applications available, both mobile and stationary
• More can be built from basic building blocks
• Open Code means User is in Control
• View, extend, modify models
• Ideal for model sharing (encryption)
• Simulation of hydraulic systems for
• Overall system dynamics
• Verification of dimensioning
• Testing of control strategies
ABOUT HYDRAULICS LIBRARY
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4. • Easy-to-Use yet Powerful
• Wide range of predefined components
• New users get started quickly
• No limitations for experienced users
• Unrivalled Flexibility
• All components can be copied and modified
• Well suited for control design and validation
• True multi-engineering tool
 Modeling of multi-domain systems, combine with
multibody mechanics, control system etc.
 Easy to integrate with other available libraries
• Visualization
• Easily visualize system behaviour
• Graphical workspace looks like a hydraulic scheme
KEY BENEFITS
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5. • Integration of hydraulic systems in wide range of multi-physics models
• Deployment
• Co-simulation
• List of applications
• Industrial Equipment:
• Agricultural, drills, hammers, excavators etc.
• Vehicles:
• Brakes, dampers, gearboxes, power steering etc.
• Aircrafts:
• Actuators, landing gear etc.
KEY CAPABILITIES
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6. KEY APPLICATIONS
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7. EXAMPLE: CRDI
SYSTEM MODEL
• Common rail diesel injection pump
model built from scratch using
Elements models
• The long line models from the library
are put to good use to capture high
frequency phenomenon
Injection flow
rail1 rail2 rail3 rail4 rail5
0.0
0.0
0.0p_start
sys_pressure
conn_pipe_len
length
conn_pipe_dia
diameter
inputParameter
pressureSource
P
idealTank
Hoffman
inlet_checkValve outlet_checkValve
s_ref
position
exact=
true
fixed
piston2
fixed1
inlet_checkValve1 outlet_checkValve1
piston3
fixed2
inlet_checkValve2 outlet_checkValve2
s_ref
position1
exact=
true
s_ref
position2
exact=
true
piston1
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8. EXAMPLE: SHIFT
SHOCK STUDY
MODEL
• Automatic transmission shift
mechanism built using off-the-shelf
library components as well as
Elements models
• Shift shock phenomenon studied using
the models
AT ASSEMBLY
inputTorque
duration=1
equivalent_resistance
d=0.1
vehicle_inertia
J=13.95077
constantTorque
tau
tank
engineInertia
J=0.1454
torqueConverterInertia
J=0.05623
torqueConverter
System
Controller
HYDRAULIC ASSEMBLY
MECHANICAL ASSEMBLY
p_C123
p_C34
p_C1R
p_C24
pressureBus p_CR
v_C123
v_C34
v_C1R
v_C24
p_C1R
p_C24
v_CR
p_C34
p_C123
flange_a1 flange_b1
p_CR
f_CR f_C123 f_C34 f_C1R f_C24
p_CR p_C123 p_C24p_C34 p_C1R
idealPlanetary1
ratio=planetaryGear1Ratio
idealPlanetary2
ratio=planetaryGear2Ratio
clutch_C123
InertiaCarrier1andRing2
J=J_Carrier1AndRing2
InertiaSun2
J=J_sunGear2
InertiaRing1andCarrier2
J=J_ring1AndCarrier2
flange_a flan
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9. LIBRARY CONTENTS
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10. • Standard package order
• Information
• Examples
• Interfaces
• Templates
• Components by type
• 2 Levels of components
• Top level components for end user
• Basic components are subcomponents, building blocks for new user-
defined components
LIBRARY CONTENTS
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11. Cylinders
• Double acting, plunger
Lines
• Rigid, flexible, discretized
Sources
• Flow, pressure
Rotary Actuators
• Ideal, variable, lossy
LIBRARY CONTENTS
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12. DirectionalControl
• For flow control
• First order spool dynamics
Elements
• Primitives for detailed component design
Valves
• Pressure and flow actuated
LIBRARY CONTENTS
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13. • Accumulators
• Sensors and Utilities.Visualizers
• Flow, pressure and temperature
• Non-ideal sensors
• Restrictions
• Laminar/Turbulent
• Cavitational effects
• Geometry based fittings
• Volumes
• Closed, open, chamber
LIBRARY CONTENTS
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14. • Fluids
• Pre-defined table based
• ThermoHydraulics
• Equation based
• Constant properties
• With unresolved air
• Nykaenen,
• Gibson,
• Hoffman
 Coefficient based jet fuels
LIBRARY CONTENTS
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15. MORE LIBRARY VIEWS
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16. MODELON COMPATIBILITY
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17. • Hydraulics Library can be combined with other Modelon libraries to solve specific engineering design tasks.
• Interesting libraries for integrating hydraulic solutions include the
• Vehicle Dynamics Library
• Pneumatics Library
• These libraries can also be used as a stand-alone solution.
RECOMMENDED MODELON LIBRARY
COMPATIBILITY
20©2019 Modelon

18. EXAMPLE: ABS
SYSTEM MODELS
• Anti-lock braking system involving the
master cylinder and caliper models
• Off-the-shelf component models from
library used to build the master cylinder
circuit and caliper models
brake_input
duration=0.7
f
pedal_force
accel_input
startTime=5
tau
P1
d
P2
ABS
actuator-tireWithSlip.gearR2T1.slip
slip
Constant BulkModulus
rod
L=0.07
elastoGap
c=1e8
d=1e6
stroke
mount
rod
L=HousingLength
elastoGap
c=1e8
d=1e6
rel
tank
meteringOri
cubicStep
relPositionSensor
s
rod1
L=HousingLength
f lange_a1
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19. LATEST RELEASE: 2019.2
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20. RELEASE: 2019.2
Enhancements
• Orifice component turbulence model documentation improved
• Simulation stability improvements
• World component from Modelon Base Library used for all
examples
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21. • Two-day training course available
• The course covers the following topics:
• Theoretical background of hydraulics
• Overview of Hydraulics Library and available components like pumps, control valves,
cylinders and restrictions
• Understanding differences and usage area between oil, line, and pump models
• Modeling techniques for robust and fast simulations
• Building detailed valves using Hydraulic Elements
• Take temperature into account with ThermoHydraulics
TRAINING
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