model development and measurements for real-time · pdf file“model development and...
TRANSCRIPT
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“Model Development and Measurements
for Real-Time Systems”
Jeannie Sullivan Falcon, Ph.D.
Chief Engineer, Control & Simulation, National Instruments
Lecturer, Mechanical Engineering & Aerospace Engineering
Departments, University of Texas at Austin
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National InstrumentsLeader in computer-based measurement and automation
Long-term track record of growth and profitability
$873M revenue in 2010
$250M revenue in Q4 2010
More than 5,200 employees; operations in 40+ countries
More than 30,000 companies
No Industry >15% of Revenue
FORTUNE’s 100 Best Companies to Work For list for 12 consecutive years
Cash and short-term investments of $351M at December 31, 2010
Reven
ue in
Millio
ns
Record FY 2010 Revenue
of $873 Million
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“To do for embedded what the PC did for the desktop.”
Graphical System Design
Instrumentation
RF
Digital
Distributed
Industrial control
RT/FPGA systems
Electronic devices
C code generation
Real-time measurements
Embedded monitoring
Hardware in the loop
Virtual Instrumentation Embedded Systems
National Instruments Vision Evolved
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LEGO Education WeDo“Hands-on Learning for
7 year-olds”
Graphical System Design
CERN Large HadronCollider
“the most powerful instrument on earth”
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Tough Real-Time Challenges
Large Telescope
Mirror ControlTokomak
Plasma ControlWind Turbine Sound Source
Characterization
CERN Hadron Collider Early Cancer Detection Structural Health Monitoring
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Model & Measurement-Based Design
• Open software & model integration
• Multiple models of computation
• Real-time software & hardware with precision timing & I/O
• Multi-core processing
• Heterogenous architectures (RT processor/FPGA)
• Distributed measurements and computing
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High-Level Design Models
Data Flow C Code Textual Math Control & Simulation Statechart
Real-Time FPGA MicroprocessorsDesktop
Graphical System Design Platform
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Graphical Development Environment
Textual Math
Parallel
I/O integration
Statecharts
Timing
Simulation
Data Flow
C and HDL Code
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CompactRIO
PXI RIO
PCI RIO
Number of Systems Deployed
Syste
m F
lexib
ility
an
d P
rice
Single-Board
RIO
CompactRIO
Integrated LabVIEWARM
targets
Deployment Curve
Custom I/O
I/O
I/O
I/O
Real-time
ProcessorFPGAWindows
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Real-Time on Multicore Processors
Assign timed loops to specific
processor cores.
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Field Programmable Gate Array (FPGA) Programming: The
Ultimate in Multicore, Multiprocessor Development
“The miracle of LabVIEW FPGA turns ideas into electronics.”
Michael Wiltberger, OptiMedica Corporation
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Dynamic System Simulation & Control• Both signal flow and .m file development
• Parallel, multi-rate, multi-core
• Single environment for:
Simulation of dynamic systems
Real-time implementation for rapid control prototyping or
hardware-in-the-loop simulation
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Co-Simulation w/ Multidomain Modeling Tools
• LMS AMESim
• Dassault Systemes Dymola
• Maplesoft MapleSim
• The MathWorks, Inc. Simscape™
• ITI SimulationX
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LabVIEW-Multisim Co-Simulation
• In development
• Easy to use:
– Multisim block in LabVIEW
• Direct feedthrough type
– Block is configurable
• Supports all solvers:
– Fixed & variable step
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Buck Converter (Step Down DC/DC Converter)
• In Multisim:
– Buck converter
– PWM generator
• In LabVIEW:
– Optimized PID
controller
PID Controller
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Real-Time Algorithms
• Open algorithms for
microprocessor targets:
– Optimization w/ constraints
– Curve fitting
– Model predictive control
– System identification
• Solutions for MIMO &
nonlinear systems
• Online design & adaptation
CompactRIOPXI RIO
Single-Board
RIO
x86 mp PPC mp PPC mp
f(x,y)
path to
min(f(x,y))
min(f(x,y))
Constraint
plane
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Beachhead Applications for Model & Measurement-
Based Design
• Online system identification
• Hybrid hardware-in-the-loop simulation &
component test
• Distributed system modeling & control
• High-speed FPGA simulation & control
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Beachhead Applications for Model & Measurement-
Based Design
• Online system identification
• Hybrid hardware-in-the-loop simulation &
component test
• Distributed system modeling & control
• High-speed FPGA simulation & control
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• Prof. Tom Kurfess, Prof. Laine Mears
• Real-time sliding friction identification
• Mechanical Engineering, Clemson
• LabVIEW Control Design & Simulation Module,
PXI, LV-RT & FPGA
Timken - Active Bearing Centering Research
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Adaptive Control Based On Real-Time System Identification
• Yaskawa linear motor with encoder and
amplifier, time-varying load
• Real-time and online system identification
using recursion
• Control gain table lookup based on estimated
model from system ID
• Architecture options – system ID on real-time
processor, control on processor or on FPGA
Sys ID & PID
Sys ID PID
RT mp RT mp FPGA
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Structural Health Monitoring for DonghaiBridge in China
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Multi-Core Recursive Stochastic Subspace Identification (mRSSI)
• Use band-pass filter to separate signals into sub-bands
• Leverages multi-core processor performance
• Identifies and tracks resonance frequencies
RSSI Freq-Time
Curve Signal
∙∙∙∙∙∙
RSSI Freq-Time
Curve
RSSI
RSSI
BP filter
BP filter
BP filter
Freq-Time Curve
Freq-Time Curve
Signal
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Applying mRSSI to Donghai Bridge
• 14 PXI systems for data acquisition and control
> 500 sensors including accelerometers, fiber Bragg grating sensors, & anemoscopes
GPS for system synchronization & time-stamping
• LabVIEW for mRSSI algorithm implementation
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Beachhead Applications for Model & Measurement-
Based Design
• Online system identification
• Hybrid hardware-in-the-loop simulation &
component test
• Distributed system modeling & control
• High-speed FPGA simulation & control
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Real-Time Testing
HILModel-based test cells,
HIL with mechanical components
Test CellsEmbedded Software
Validation(HIL, MIL, SIL, RCP)
Mechanical Testing(Durability, Dyno, Environmental …)
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Evolution of HIL Simulators
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UI Objects
CustomUI Objects
CustomTools
Workspace
Real-Time Engine Configuration
Custom DeviceConfiguration
System Explorer
Run-Time APIConfiguration API
I/O
Custom Devices
Stimulus Logging
Alarms ProceduresCalculated Channels
Model DLLs
NI VeriStand Real-Time Engine
FPGA Personalities
Run-Time Tools
NI VeriStand Framework
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Supported Modeling EnvironmentsSupported
• The MathWorks, Inc. Simulink®
software
• LabVIEW
• LabVIEW Control Design and Simulation Module
• MapleSim models from Maplesoft
• SimulationX from ITI
• GT-POWER engine models from Gamma Technologies Inc.
• Tesis DYNAWare models
• NI MATRIXx SystemBuild
• Esterel SCADE Suite
• C/C++/FORTRAN/Ada
In Work
• CarSim from Mechanical Simulation
• AVL BOOST/CRUISE
• WaveRT
• AMESim models from LMS
• Models from VI-grade
• Dymola models from Dynasim
• Easy5
Simulink® is a registered trademark of The MathWorks, Inc. All
other trademarks are the property of their respective owners.
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National Oilwell Varco – HIL Simulation
• “LabVIEW supports to allocate cores to program or part of the program on multi-core
computers. This feature was used to give the simulation three cores and the
interface modules one.”
• “In practice, this stage was done by converting the Simulink models into equivalent
models under the National Instruments (NI) LabVIEW environment, which supports
running a simulation in realtime.”
“Hardware-In-the-Loop Simulations Used as a Cost
Efficient Tool for Developing an Advanced Stick-Slip
Prevention System” IADC/SPE Drilling Conference and
Exhibition, February 2010
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Wind turbine HIL Simulation Siemens Wind Power
Denmark
• Hardware-in-the-loop (HIL) simulation of wind, pitch & blade position to test turbine controller
• Multicore PXI, LabVIEW RT & FGPA
• LabVIEW Control Design & Simulation Module
Real-time
HIL model
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Beachhead Applications for Model & Measurement-
Based Design
• Online system identification
• Hybrid hardware-in-the-loop simulation &
component test
• Distributed system modeling & control
• High-speed FPGA simulation & control
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M1
ESO - ELT – Primary Mirror (M1) Control
6,000 SENSORS
984 MIRRORS
3,000 ACTUATORS
3k x 6k MATRIX
1 MILLISECOND
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M1 Control Proposed System SetupNI cRIO Node for Local
Sensor / Actuator I/O
• 1 cRIO Node per Mirror Supervisor
…
Deterministic EtherCAT
Network Ring
• 25-30 cRIO Nodes per
eCAT Network Ring
NI PXI Distributed
Mirror Controller
• 6 eCAT Network Rings
per Distributed Mirror
Controller
Supervisory
Network
• 6 Distributed Mirror
Controllers per
Supervisor
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Tokamak – Plasma Diagnostics and Control
with Multicore
• X-Ray Tomography and Plasma Control with Processing under 1 ms
• 192 Toroidal Stations
512 Channels per Station
10-kHz Sampling Rate per Channel
All Channels Synchronized
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Plasma Diagnostics & Controlwith NI LabVIEW RT
• Max Planck Institute (Munich, Germany)
• Plasma control in nuclear fusion Tokamak with LabVIEW
on an eight-core real-time system
“…with LabVIEW, we obtained a 20X processing speed-up on an
octal-core processor machine over a single-core processor…”
Louis Giannone
Lead Project Researcher
Max Planck Institute
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Next Steps:
X-Ray Tomography for Plasma Control
Tomographic
ScanX-Rays
Reconstruction
Processing
Plasma
Contour
Analysis
Magnetic
Actuators
512 Channels
Grad-
Shafranov
PDE
m
RjZRRR
R o
2
21
)}}},({|{|{),( 1 pFfFByxI
All Operations:
1 ms Loop Time
100 GFLOPs
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Beachhead Applications for Model & Measurement-
Based Design
• Online system identification
• Hybrid hardware-in-the-loop simulation &
component test
• Distributed system modeling & control
• High-speed FPGA simulation & control
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UCSB w/ Astrom – MEMS Control
• Prof Karl Astrom (Lund) & Prof
Kimberly Turner (ME) & Prof Forrest
Brewer (EE)
• FPGA-based control for tunneling
accelerometer (62.5 kHz loop rate)
• CompactRIO w/ wireless
communication to host
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small cantilevers
MIT - High Speed Atomic Force Microscope
• Prof Kamal Youcef-Toumi & Dan Burns,
ME and Dr. Georg Fantner (now at EPFL)
• Modeling and design in LabVIEW:
System Identification Toolkit
Control Design Simulation Module
Digital Filter Design Toolkit
• Control implementation w/ LabVIEW
FPGA:
Filtering & input loop shaping (200 kHz) on
CompactRIO
Feedback controller (500 kHz) on PXI RIO
device
topo defl
custom sample scanner
custom optics head
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Real-Time HIL Testing- SET GmbH
Real-Time Power Simulators for HIL Testing of Drives/Inverters
• Real-time simulation as a substitute for mechanical test benches
• Enables comprehensive automated testing, including fault scenarios
• NI LabVIEW FPGA, NI Reconfigurable I/O hardware, High Performance Real-
Time Power Simulators
Real-Time “Virtual
Motor” Simulator
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Education
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FPGA-based Real-Time Wind Turbine HIL SimulationProof of Concept
NIWeek 2009 Keynote Demo Video with NI VeriStand
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Imperial College London – Student Design Team
• Racing Green Endurance – from
Alaska to Argentina (16,000 miles)
in an electric sports car
• Undergraduate teaching project
involving almost 100 students
across 8 engineering departments
• Teams build low emissions,
hydrogen fuel cell, and battery
electric vehicles
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Imperial College – Racing Green Endurance
Acquisition Output
NI LabVIEW FPGA
Safety Control
Battery Management
Regenerative Braking
Thermal Management
NI LabVIEW Real-Time
Driver Interface
Data Logging
Traction Control
NI CompactRIO
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Multidisciplinary Teamwork ProjectsRensselaer Polytechnic Institute : HOT-V
Theory Design Prototype Deploy
4 Weeks 8 Weeks 1 Week
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UT-Austin – Dynamic Systems & Controls Lab (U)• Prof. Raul Longoria, ME
• Example - two can simulation
• Formula node used to:– Check for negative dynamic volume (V) condition
– Calculate orifice flow rate (Q)
V1(0)
K2
K1
V2(0)
Can 1
Can 2
Q1 feeds Can 2
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Model & Measurement-Based Design
• Open software & model integration
• Multiple models of computation
• Real-time software & hardware with precision timing & I/O
• Multi-core processing
• Heterogenous architectures (RT processors/FPGA)
• Distributed measurement and computing
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LEGO Education WeDo“Hands-on Learning for
7 year-olds”
Graphical System Design
CERN Large HadronCollider
“the most powerful instrument on earth”