Sustainable Development and NCDs George Alleyne April 18, 2012 Pan American Health Organization.
Dynamic Systems and Control Simulated Aircraft - Alleyne...
Transcript of Dynamic Systems and Control Simulated Aircraft - Alleyne...
Simulation
Experimentation
Dynamic Systems and Control
Alleyne Research GroupDepartment of Mechanical Science and Engineering, College of Engineering, University of Illinois at Urbana-Champaignhttp://arg.mechse.illinois.edu/
Applied Controls Research
ARG
Theory Simulation
Experimentation
What we do & where we are going
Developing Great Research and Great People
Careers in Industry
Understand the system
dynamics
Develop control theory
Validate via simulation and
experimentation
Produce novel control
techniques
Start with an important problem
Theory
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Superh
eat
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Superheat Response to 400 RPM Step Decrease
FF PID 1000 RPMic
PID 1000 RPMic
Right: Using an advanced PID control strategy which incorporates feedforward control, we achieve better regulation of evaporator superheat than with a conventional PID controller. Better regulation of superheat is critical to the efficiency and safety of A/C&R systems.
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Above: An experimental air-conditioning and refrigeration (A/C&R) test stand is used to validate models and test our control and optimization algorithms.Right: By optimizing the upper and lower bounds of a hysteretic on-off controller to minimize energy consumption, savings on the order of 5% are achieved. The upper figure shows the on-off cycling pattern with fixed hysteresis bounds, and the lower figure shows the optimized on-off cycling pattern.
A/C & R Optimization and Control
Vapor Compression Systems
Electrohydrodynamic Jet Printing
Roll-to-Roll E-Jet System
E-jet printing is a technique that uses electric fields to deliver an ink to a substrate for high resolution (<1µm) patterning applications. The advantages of the E-jet process are the rapid fabrication of fine structures with feature sizes down to 100nm combined with a range of material inks that can be used. Advancements in sensing and control of E-jet printing are being pursued because of its potential to fabricate high-resolution patterned devices in flexible electronics as well as biological applications such as protein arrays and biosensors. Ongoing work to develop a roll-to-roll system for E-jet printing will increase throughput, decrease costs, and enable printing on flexible substrates.
Desktop E-Jet Printer with Multisyringe
Roll-to-Roll Manufacturing5 mm
Open Quadrants Closed Quadrants
Open QuadrantsMulti-Feature Size
Micro Additive Manufacturing
ARG is home to several energy system andmanufacturing experimental platforms. Newexperimental systems are developed frequentlyand students have access to many platformswithin the lab and the school of engineering.
Control Hierarchy
SimulatedAircraft
ExperimentalHardware
MissionData
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Mission Time [sec.]
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Landing& Ground
DescentClimb
Cruise
Ground Takeoff
Electrical Control System
Thermal Control System
Information Flow
Vehicle Level
System Level
Coordination Level
Component Level
Physical Level
System
60 sec
10 sec
1 sec
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0.001 sec
continuous
1C
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4,1C 4,2C 4,3C 4,4C 4,5C4,6C
5,4C5,3C5,2C5,1C Inputs/Outputs
Thermal/Electrical Power Systems
MATLAB/Simulink is used extensively to developand test controllers prior to implementation onhardware.
ARG has developed many toolsets over the years,several of which are actively used in industry.
Control Hierarchy
SimulatedAircraft
ExperimentalHardware
MissionData
0 1000 2000 3000 4000 5000 6000 7000 80000
10,000
20,000
30,000
40,000
Mission Time [sec.]
Alt
itu
de [
ft.]
Landing& Ground
DescentClimb
Cruise
Ground Takeoff
Electrical Control System
Thermal Control System
Information Flow
Vehicle Level
System Level
Coordination Level
Component Level
Physical Level
System
60 sec
10 sec
1 sec
0.1 sec
0.001 sec
continuous
1C
2,1C 2,2C
3,1C 3,2C 3,3C
4,1C 4,2C 4,3C 4,4C 4,5C4,6C
5,4C5,3C5,2C5,1C Inputs/Outputs
Aircraft PowerFlow Toolset Thermosys Toolset
Hydraulic Power Systems
k k+1 k+2 ….. k+pSample
time
Prediction Horizon
FUTUREPAST
Reference TrajectoryMeasured OutputPredicted OutputPast Control InputPredicted Control Input
Model Predictive ControlModel Predictive Control
Extremum Seeking
Control Signal
SampleTime
Iteration Iteration
SampleTime
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ILC Algorithm
uj ej
uj+1
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Continual process improvement through process repetition
Iterative Learning ControlIterative Learning Control
Theory is central to the development of novel control techniques,and the Alleyne Research Group (ARG) utilizes various forms ofcontrol theory to advance control in many different fields.
The newest experimental system seeks toemulate the interaction between thermal andelectrical systems of an aircraft.
Electrohydrodynamic Jet Printing
Roll-to-Roll E-Jet System
E-jet printing is a technique that uses electric fields to deliver an ink to a substrate for high resolution (<1µm) patterning applications. The advantages of the E-jet process are the rapid fabrication of fine structures with feature sizes down to 100nm combined with a range of material inks that can be used. Advancements in sensing and control of E-jet printing are being pursued because of its potential to fabricate high-resolution patterned devices in flexible electronics as well as biological applications such as protein arrays and biosensors. Ongoing work to develop a roll-to-roll system for E-jet printing will increase throughput, decrease costs, and enable printing on flexible substrates.
Desktop E-Jet Printer with Multisyringe
Precision Motion Control
The Alleyne Research Group (ARG) works at the intersection of theoretical control,dynamic modeling and simulation, and hardware-based experimental validation byapplying a wide variety of control techniques to solve important societal problems.
How does it work? Why does it work?
Will it always work?
How good is our model?
How does the system behave? How can we make the system behave better?
How does it work on a real system?