Fluid and Mechatronic Systems, Flumes
Petter Krus
Linköping University, Sweden
Technologies
• Systems that are characterized by a close
coupling between:
•
Mechanical system
•
Power transmission/Actuation system
•
Sensors
•
Control System
• This requires, Multidisciplinary co-design, i.e.
Mechanical design and control system codesign where modelling and simulation are
central
Flumes Personel
• 1+0.2+0.2 Pofessors
• 3.2 Lecturer
• 0.5 Adjunct lecturer
• 9 PhD students (2 industrial (Volvo)
•
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5 are planned to have a PhD during 2015
Karl Pettersson
Research on Hydromechanical
Transmissions and Hybrid Motion systems
•Flumes/VCE project
•Hydromechanical transmission
•Hardware-in-the-Loop testbench
Liselott Ericson
Alessandro Dell’Amico
Hydraulic Transmission in Forestry Machines
•
Six wheel drive hydraulic
transmission
•
Pendulum arms to e.g.
evenly out ground pressure
•
Reduced impact on soil
•
Improved productivity
Liselott Ericson
Hydraulic Pump/Motor in a Noise Perspective
HOPSAN
Complex
Method
•
Objective
Function
Design method to minimise flow
pulsation and sound in hydraulic
pumps/motors
Björn Eriksson
Mikael Axin
Energy Efficient Mobile Hydraulic
Actuation Systems
• Project sponsored by Parker HannifinHannifin, USA
Original Load Sensing system (LS)
with closed loop controlled pump
Flow sharing system with open
loop controlled pump
Alesandro Dell’Amico
Conceptual Design of a Closed-Centre Power-Steering
for Active Steering
Sid 15
Linköpings
2016-06-28
Alesandro Dell’Amico
Conceptual Design of a Closed-Centre Power-Steering
System using Hardware-in-the-Loop
•
Electrohydraulic closedcenter valves for enabling
active steering and reduced
energy consumption
•
A generic test rig
•
A physical steering gear is in
the loop
 Pressure control as a generic control
concept
 Pressure/force control is very
attractive in position control loops,
becomming more important with
increasing automation also in mobile
machine.
Sid 16
Linköpings
2016-06-28
Digital hydraulics
Multi-chamber cylinders
Digital valves
Discrete force spectrum
Introducing digital hydraulics with more
similar size piston areas
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Henri Belan, Victor de Negri,
UFSC, Brazil
p = (20.0, 13.5, 0.75) [MPa]
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Force [kN]
30
20
10
0
-10
-20
-30
-40
0
10
20 30 40 50 60 70
Number of Discrete Forces
AA
80
AB
AC
AD
Areas: AA = 12.1; AB = 10.6; AC = 10.0 and AD = 10.1 (x10-4 [m2])
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The Potential of Fluid Power
• The problems of today's wind turbines, e.g
low efficiency due to mechanical
transmission, can be substantially reduced
with a hydraulic transmission. This will be
realized in the Mitsubishi Sea Angel concepts
in a park of 7 MW wind farm offshore.
• Caterpillar introduced a hybrid excavator with
energy recuperation on the swing arm,
reducing energy consumption with
30%.(Payoff time is two years)
• NFPA predicts average of 4% annual growth
2015-2018
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Hopsan Development
•
Software for system simulation. Hydraulic,
mechanical, electrical, control systems, thermal, etc.
•
Work on first Hopsan (in Fortran) began in late 1970s
at Linköping University
•
Introduction of TLM in 1990
•
Simulation based optimisation 1991
•
Used by industry and for research
•
Development of new version called Hopsan NG (in
C++) began in 2009
•
Longest running simulation software with continuous
development in the world (?)
•
Freeware that can be downloaded from
www.iei.liu.se/flumes/system-simulation/hopsanng
System simulation
• Real-time Simulation, and Faster than Real Time Simulation
Technologies
•
Distributed modeling
•
Parallelization of simulation models for multi-core processors
•
Hardware in the loop simulation
• Using bilateral delay line (transmission line modelling, TLM) for
model partitioning
Sid 21
Linköpings
2016-06-28
Distributed Model Structure
Individual simulation setup
Solver
Component
model
Ideal for using multi-core
architectures
Enables interdisciplinary
model development and
simulation
Efficient for large systems
Solver
Component
model
Sid
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Solver
Component
model
Linköpings
2016-06-28
Ideal for FMI framework
Example: Aircraft System
The aircraft attitudes during an Smaneuver.
Angular position and reference position of
the rudder actuator
Ingo Staack
KBE for system
Knowledge modelling of aircraft hydraulic System
SAAB
2013-11-12
Magnus Landberg, Saab
Samarbetsprojekt FLUMES –
Saab kring ny cylinderinnovation
• Ny cylinder från Saab av ett helt nytt slag!
• Öppnar upp nya möjligheter att använda hydraulik i ställdon (istället för
el eller pneumatik)
• Mycket stora slaglängder
• Inget externläckage
• Erbjuder sekundärreglering
• Hög styvhet och låg kapacitans
• Kompakt och energieffektiv
• Innovationen har många applikationsområden
Magnus Landberg, Saab
Samarbetsprojekt FLUMES –
Saab kring ny cylinderinnovation
• Samarbetsprojekt sedan december 2014
mellan FLUMES och Saab i Linköping för att
demonstrera innovationen och dess potential
• Vinnare av Saab-koncernens Draknäste 2014
• Finansiering från Saab och
Energimyndigheten
The Global Innovation Index 2014 (GII), in its 7th edition this
year, is co-published by Cornell University, INSEAD, and the
World Intellectual Property Organization(WIPO, an agency of the
United Nations, UN).
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Slutsatser
• Sverige måste leda utvecklingen för att vi ska
kunna behålla den position vi har idag.
• Sverige kan inte bara förlita sig på att kopiera
andra (som är sämre….)
• Detta är gäller lika mycket för svensk
hydraulik
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Applied University Research for the
Generation of Excellent Engineers
Research results
Domain knowledge
Research
Researchers
Phds
Education
Students
Engineers
Industry
Fluid and Mechatronic Systems
• Maintain and develop laboratory resources
• Modelling and simulation technologies
• Design analysis and system optimisation
• Applications: Mechatronics, hydraulics, construction machines,
road vehicles, and aircraft.
• Keywords: System dynamics, and system efficiency
•
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Design – model – simulate –analyse – prototyping – model validation
– evaluation and testing
Brasilien
• Befolkning 202 miljoner (USA 322), 5
• Yta 8 515 767km² (USA 9 857 306 km²), 5
• BNP 2243 GUSD (USA 16768 GUSD),7
•
Sverige 580 GUSD, 21
• Gripen affären har gett Sverige mycket stor
(positiv) synlighet i Brasilien
• Stor möjlighet för Svenska företag och
universitet att få stort genomslag.
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www.liu.se
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