Modelon’s Pneumatics Library is used to verify and optimize the design of complete pneumatic systems throughout a product lifecycle. Applications include suspension and brake systems, machine tools, heavy-duty pneumatic tools such as jackhammers, impact wrenches and drills.

1. ©2019 Modelon.
PNEUMATICS
LIBRARY
Overview

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

3. • Modelica library for pneumatic systems and pneumatic circuits
• Based on the ideal gas law assumption
• Components
• Most models needed for pneumatic 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 pneumatic systems for
• Overall system dynamics
• Verification of dimensioning
• Parameter studies
ABOUT PNEUMATICS LIBRARY
3©2019 Modelon

4. • Easy-to-Use yet powerful
• Wide range of predefined components
• Well suited for control design and validation
• True multi-engineering tool
 Modeling of multi-domain systems, combine with multibody
mechanics, control system etc.
• Visualization
• Easily visualize system behavior
• Graphical workspace looks like a pneumatic schematic
KEY BENEFITS
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5. • Integration of pneumatic systems in wide range of multi-physics models
• Parametric studies of designs
• Deployment
• Design of experiment
• Optimization
• List of applications
• Industrial Equipment:
• Road construction, drills, hammers etc.
• Vehicles
• Brake systems, air suspension
KEY CAPABILITIES
5©2019 Modelon

6. ©2019 Modelon.
KEY APPLICATIONS
6©2019 Modelon

7. EXAMPLE: MOTOR
CONTROL
This example model demonstrates a PID controller that tries to
maintain the vane motor at a constant speed. By controlling the
air pressure in to the motor the controller can control the speed
of the vane motor. A load is model through a brake that is
activated at 0.6 s. Pneumatic vane motors can be used is to
start large engines e.g. industrial engines
7©2019 Modelon

8. EXAMPLE: MULTI-
POSITION CYLINDER
This example shows how easy even a complex systems can be
modeled with Pneumatics Library. Multi position cylinders
typically consist of two or three connected cylinders to reach
three or four end positions. There is typically one port for every
head-end chamber and one port for the connected rod-end
chambers. In this example three double acting cylinders are
used from the library. One of the cylinders (C3) has pneumatic
stroke cushioning enabled, indicated by an arrow over the
piston in the icon. The rods (Rod1 and Rod2) places the
housing at the correct positions. The cylinders are connected by
ElastoGaps.
8©2019 Modelon

9. EXAMPLE: LINEAR
ACTUATOR
This example shows the principle of pneumatic stroke
cushioning. A typical cylinder drive can very easily be modeled
with the cylinder models in the library.
9©2019 Modelon

10. ©2019 Modelon.
LIBRARY CONTENTS
10©2019 Modelon

11. • Standard package order
• Information
• Examples
• Interfaces
• Templates
• Components by type
• 2 Levels of components
• Top level components for end user
• Basic components are
sub-components, building blocks
for new, user-defined components
LIBRARY CONTENTS
11©2019 Modelon

12. Cylinders
• With or without cushioning effect
• Bellows
Lines
• Long line
• Capillary
Sources
• Reserviors
• Silencers
LIBRARY CONTENTS
12©2019 Modelon

13. Constant
• Constant gas property model
• Backward compatible with old Environment
component
IdealGas
• Ideal gas model compatible with fluids
from Modelon Base Library
• 7 pre-defined fluids: Moist air, dry air, argon,
nitrogen, oxygen, carbon dioxide
Real gas
• Fast switching between real
and ideal gas
• High pressure media - H2 and N2 models
• Visualize compressibility factor
for gas model validity
LIBRARY CONTENTS
13©2019 Modelon

14. DirectionalControl
• For flow control
• First order spool dynamics
Elements
• Primitives for detailed component design
Valves
• Pressure and flow actuated
LIBRARY CONTENTS
14©2019 Modelon

15. Restrictions
• Fittings
• Geometry based restrictions
• Nozzles and orifices
Rotary Actuator
• Vane motor
• Rotary actuator
Sensors and Utilities.Visualizers
• Pressure and flow
Volumes
• Chamber and volume models
LIBRARY CONTENTS
15©2019 Modelon

16. MORE LIBRARY VIEWS
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17. ©2019 Modelon.
MODELON COMPATIBILITY
17©2019 Modelon

18. • Pneumatics Library can be combined with other Modelon libraries to solve specific engineering design
tasks.
• Interesting libraries include the
• Hydraulics Library
• Vehicle Dynamics Library
• These libraries can also be used as a stand-alone solution.
RECOMMENDED MODELON LIBRARY
COMPATIBILITY
18©2019 Modelon

19. EXAMPLE: AIR
SUSPENSION
SYSTEM
Air suspension model demonstrating vehicle ride height change
19©2019 Modelon

20. AIR SUSPENSION MODEL
20©2019 Modelon
• Air suspension modeling using
bellows
• Ride height changing circuit with
other valves modeled
fixed
compressor
p = 100000Pa
T = 293K
nonReturnValve line
useAdditionalVolume
falseadditionalVolume
singleValveUnit
Boolean
Controller
IdealBellows1
MountingPlateA
m=BellowsMass/2
MountingPlateB
m=BellowsMass/2
StrokeLimiter
L=stroke_max
ElastoGap1
c=10e3/0.01
d=1e4
springDamper
d=d
c=c
MinimumStroke
c=10e3/0.01
d=1e4
f lange_a f lange_b
multiPortVolume
13
2
dCV_3_2_Closed1
useAdditionalVolume
0 10 20 30 40 50 60
0.05
0.10
0.15
0.20
rideHeight
0 5 10 15
true
false
true
false
booleanController.pressureControl
booleanController.gateControl

21. EXAMPLE:
BRAKE SYSTEM
Hydraulic brake system and pneumatic brake booster example
demonstrating FMI capabilities
force_input
offset=0
P1
d
P2
k=5e-5
pressure_to_force
tau
step
startTime=35
©2019 Modelon 21

22. • Anti-lock braking system involving the vacuum booster model
• Off-the-shelf component models from library used to build the booster circuit
BRAKE SYSTEM MODEL
22©2019 Modelon
diaphragmSpring
c=1000
diaphragm
VA
e a
c
b
c
a
mass
m=0.1
mass1
m=0.1
mass2
m=0.1
p = 100000Pa
T = 293K
vacuum.port_2.m_flow*environment.rho0/max(1e-6, boosterValves.area_vacuumValve)
outflow
-atmosphere.port_2.m_flow*environment.rho0/max(1e-6, boosterValves.area_airValve)
inflow
flange_aref
f lange_a f lange_b
force_input
offset=0
P1
d
P2
k=5e-5
pressure_to_force
tau
step
startTime=35
ABS
support fixed
f
cylinder_force
f_cylinderf_pedal
s_pedal
s_booster
pedal
booster
diaphragm
valves
10 20 30 40 50 60 70
0
40
80
vehicleVelocity
10 20 30 40 50 60 70
0.00
0.01
0.02
0.03
boosterPosition

23. • Typical usage:
• Model Calibration and verification of existing designs
• Analyze system behavior of a new design
• New design plausible?
• Analyze possible design improvements
• Depends on Design goals
• Robustness of design
INDUSTRIAL EQUIPMENT
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24. ©2019 Modelon.
LATEST RELEASE: 2019.2
24©2019 Modelon

25. RELEASE: 2019.2
Enhancements
25©2019 Modelon
• Plot command scripts improved
• Icon animations for the components in Volumes package added