Physics Based System Analysis & Co- · PDF filePhysics Based System Analysis & Co-Simulation...
Transcript of Physics Based System Analysis & Co- · PDF filePhysics Based System Analysis & Co-Simulation...
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© 2011 ANSYS, Inc. September 9, 2014 1
Physics Based System Analysis & Co-Simulation
Scott Stanton Technical Director
Advanced Technology Initiatives
ANSYS, Inc.
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© 2011 ANSYS, Inc. September 9, 2014 2
Detailed 3D Multiphysics
Maxwell
Fluent
Mechanical
Simplorer
Software Engineering & System Simulation
Systems V Practices and Owners
System Validation
Sub-System Integ. & Verification
Component Integration
& Verification
Requirements and Specifications
Sub-System Design
System Functional & Architectural Design
Mechanical Electrical Software
Detailed Design & Optimization
Systems Functional Engineering
Functional Allocations
Detailed Architecture Architecture
2
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© 2011 ANSYS, Inc. September 9, 2014 3
Model Simulation Result Tool
Requirement Req 23: On request, the valve should close in 500us
X MSWord, DOORS, …
Functional simulation
SCADE System
System simulation
(ODE)
Simplorer using Circuits or VHDL-AMS (Modelica in Progress)
High fidelity physics based
simulation (PDE)
Fluent, Maxwell, Mechanics, Workbench
System Validation
ODE+ROM+Ctrl Close loop validation
Simplorer with SCADE Suite and ROMs from PDE Solvers
500us 0
Pos
true
false t
0
500us
t
Pos
Pmax
Magnetic
t
Pos
0 500us
t
Pos
Pmax
500us
Simulation Driven Product Development
Pmax
Thermal
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© 2011 ANSYS, Inc. September 9, 2014 4
Cost of Correcting Defects Throughout the Development Process
Systems Engineering For Dummies, Cathleen Shamieh, ® IBM Limited Edition
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© 2011 ANSYS, Inc. September 9, 2014 5
Physical System Simulation
Simulation Synchronizer
Simulink
C/C++
User-defined
Models
Circuits: States:
Electromagnetic
(FEA)
Mechanical
(FEA)
Model Extraction: Equivalent Circuit, Impulse
Response Extracted LTI, Stiffness Matrix
Fluidic
(CFD)
VHDL-AMS Modelica* IF (domain = quiescent_domain)
V0 == init_v; ELSE
Current == cap*voltage'dot;
END USE;
Blocks:
Thermal
(FEA/CFD)
Matlab
Simulink
Co-Simulation
RBD
Maxwell
CFD
*Currently Under Development
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© 2011 ANSYS, Inc. September 9, 2014 6
Types of Reduced Order Models – ROMs
Thermal
Magnetic
Electrical
Mechanical
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© 2011 ANSYS, Inc. September 9, 2014 7
PExprt
Simplorer
Simplorer
RMxprt
Maxwell
VHDL-AMS
Maxwell
VHDL-AMS
Q3D
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© 2011 ANSYS, Inc. September 9, 2014 8
Reduced Order Models (ROMs) for Thermal Systems
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© 2011 ANSYS, Inc. September 9, 2014 9
Battery Physics – Thermal
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© 2011 ANSYS, Inc. September 9, 2014 10
Battery Thermal Behavior via ROM
• Type 1: Thermal Network
• Careful Calculation and Calibration needed
• Accuracy Compromises
• Type 2: LTI – State Space
• Can be as Accurate as CFD
• No Calibration
LTI t t
Step Input
Step Response
1
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© 2011 ANSYS, Inc. September 9, 2014 11
Reduced Order Model for CFD
ROM
Voc = -1.031*exp(-35*(abs(IBatt.V/Vinit))) + 3.685 + 0.2156*(abs(IBatt.V/Vinit)) - 0.1178*(abs(IBatt.V/Vinit))^2 + 0.3201*(abs(IBatt.V/Vinit))^3 + 0.3/30.0*(U1.Temp_block_1-273)
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© 2011 ANSYS, Inc. September 9, 2014 12
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© 2011 ANSYS, Inc. September 9, 2014 13
Heat dissipated
Discharge curve
Simplorer battery model
CFD battery model
Co-simulation
Co-Simulation between System and CFD
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© 2011 ANSYS, Inc. September 9, 2014 14
Nonlinear ROM Extracted from CEM Solver
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© 2011 ANSYS, Inc. September 9, 2014 15
Approach Summary
-300.00 -200.00 -100.00 0.00 100.00 200.00 300.00ECE_Iq [A]
-0.25
-0.13
0.00
0.13
0.25
0.38
0.50
me
an
(EC
E_
psi_
d)
Curve Info
mean(ECE_psi_d)ECE_TR_Setup : TransientECE_Id='-300A'
mean(ECE_psi_d)ECE_TR_Setup : TransientECE_Id='-225A'
mean(ECE_psi_d)ECE_TR_Setup : TransientECE_Id='-150A'
mean(ECE_psi_d)ECE_TR_Setup : TransientECE_Id='-75A'
mean(ECE_psi_d)ECE_TR_Setup : TransientECE_Id='0A'
mean(ECE_psi_d)ECE_TR_Setup : TransientECE_Id='75A'
mean(ECE_psi_d)ECE_TR_Setup : TransientECE_Id='150A'
mean(ECE_psi_d)ECE_TR_Setup : TransientECE_Id='225A'
mean(ECE_psi_d)ECE_TR_Setup : TransientECE_Id='300A'
01_Prius_design_IdIq_Symm_ECEECE_psi_d
n1
n2
n3
m1
SimulatorModel=PMSM_DQ_GNurbs
w+
V_ROTB1
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© 2011 ANSYS, Inc. September 9, 2014 16
Simplorer Model
0
w+
V_ROTB1
EQU
FML1
S1:=if (Time<=0.01, 1, 0)
R7
R6
R5
R=0.2ohm
R1
R2
R3 L4
L3
L2 n1
n2
n3
m1
SimulatorModel=PMSM_DQ_GNurbsA B C
N
U_MOT
TS1
TS2
TS3
0.00 10.00 20.00 30.00 40.00 50.00Time [ms]
-125.00
-75.00
-25.00
25.00
75.00
125.00
Y1
Curve Info
InducedVoltage(PhA)Imported
InducedVoltage(PhB)Imported
InducedVoltage(PhC)Imported
U_MOT.V_ATR
U_MOT.V_BTR
U_MOT.V_CTR
0.00 10.00 20.00 30.00 40.00 50.00Time [ms]
-200.00
-75.00
50.00
175.00
Y1 [A
]
Curve Info
L2.ITR
L3.ITR
L4.ITR
Current(PhA)Imported
Current(PhB)Imported
Current(PhC)
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© 2011 ANSYS, Inc. September 9, 2014 17
Sensor Physics and Behavior via Reduced Order Model (ROM)
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© 2011 ANSYS, Inc. September 9, 2014 18
Sub-System Simulation Verify Behavioral Operation
-20.40m
20.40m
0
0 40.00m20.00m
MRSensor.Sensitivity
Sensor output
Voltage 28.00u
29.00u
28.50u
0 40.00m20.00m
VM1.V [V] + -2.50
-9.92
10.00
0
0 40.00m20.00m
VM6.V [V]
Amplified
Output Voltage
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© 2011 ANSYS, Inc. September 9, 2014 19
Example: Co-Simulation Magnetic – Pneumatic Force Coupling
0
0
0
0 0
S
+
SM_TRB1
F
F_TRB2
MASS_TRB1
V0=0m_per_sec
S0=0.5mm
M=1gram
F
F_TRB1
Ide
al
STOP
LOWER_LIM=0.01mm
UPPER_LIM=0.195mm
F
F_mag
F
F_Plunger
F
F_spring
SPRING_TRB1
C=333
S+
S_TRB1
VALUE=0.185mm
E1
R1
T1
T2T3
T4
smpl_lift
cfd_force
S1
CTRL=S1
D1
CEM Co-Simulation
CFD Co-Simulation
0.00 2.50 5.00 7.50 10.00 12.50 15.00Time [ms]
0.00
100.00
200.00
300.00
400.00
500.00
Po
sitio
n [u
m]
0.00
0.01
0.02
0.03
0.04
0.05
0.06
Co
il C
urr
en
t [A
]
-20.00
-15.00
-10.00
-5.00
0.00
5.00
10.00
15.00
20.00
Plu
ng
er
Fo
rce
[n
ew
ton
]
02_CoSim_MAgnetic_CFDTransient Switching with CFD ANSOFT
Curve Info Y Axis
Current Current
Plunger Force Plunger Force
Position w. CFD Y3
Position w/o CFD Y3
Simplorer Schematic
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© 2011 ANSYS, Inc. September 9, 2014 20
Frequency Dependent ROM
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© 2011 ANSYS, Inc. September 9, 2014 21
Inverter Package Model
3 Phase Model
1 Phase Model
3 Phase Model
1 Phase Model
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© 2011 ANSYS, Inc. September 9, 2014 22
LCR Extraction + Circuit
LCR Extraction
Simplorer Circuit
State Space Model
Electromagnetics Harmonic Analysis
L – Inductance C – Capacitance R – Resistance
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© 2011 ANSYS, Inc. September 9, 2014 23
Parasitics Extraction
Extract the Resistance, Inductance and Capacitance (RLC) parameters of the package by using the Boundary Element Method (BEM)
Example for two conductors
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© 2011 ANSYS, Inc. September 9, 2014 24
Definition of Inverter package circuit
Bus Bar
IPM Gate Drive
Simplorer
Q3D Extractor
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© 2011 ANSYS, Inc. September 9, 2014 25
Output switching waveform with considered extracted parameter
Device Model + Parasitic parameter : Switching ON/OFF
Surge and ringing waveform
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© 2011 ANSYS, Inc. September 9, 2014 26
Cable Design Automation
Phase A
Phase B
Partition
Phase C
Armor
Outer Jacket
Hydraulic Tubes
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© 2011 ANSYS, Inc. September 9, 2014 27
ANSYS Approach: Process Compression
1.00E-006 1.00E-005 1.00E-004 1.00E-003 1.00E-002 1.00E-001 1.00E+000 1.00E+001 1.00E+002F [MHz]
-75.00
-65.00
-55.00
-45.00
-35.00
-25.00
-15.00
-5.00
3.65
S (
dB
)
Simplorer_SmatrixS11 and S21Curve Info
dB20(S11)Imported
dB20(s21)Imported
Design Inputs Post-Processing
• Fully Automated • Maxwell or Q3D
• Graphical Matrix Reduction • Parameter Extraction • Project accessible in Maxwell
or Q3D for field overlays or workbench coupling
• Template Driven Input
Analysis stage requires some expertise and training Automate analysis for better accessibility in engineering and the field
Analysis
Python/(Esterel) Scripting
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© 2011 ANSYS, Inc. September 9, 2014 28
Cable Design Kit – Post-Processing
• User Friendly panel to define Cable Connections
• Matrix reduction performed for Impedance and Admittance matrix
• Sequence Parameter Calculation of resulting matrix is 3x3
Reduced Admittance Matrix
Sequence Parameters
Matrix Reduction
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© 2011 ANSYS, Inc. September 9, 2014 29
Model Verification: Test Circuit Generation
Define S parameters in Simplorer using Output Variables and reference power meters
All 1ohm reference termination resistors
1OhmSpars 0
0
0 0
Circle1_A Circle1_B
R1 R2E1
W
+
WM1
W
+
WM2
With power on the input side, S11 and S21 are obtained (a1 ≠ 0, a2 = 0) If desired to obtain S22 and S12 (a2 ≠ 0, a1 = 0) place a power source on the secondary side, shorting the supply on the primary.
a1 a2
b1 b2
+ +
- - V1 V2
I1 I2
Make power meter orientation consistent with current flow references
(Positive in)
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© 2011 ANSYS, Inc. September 9, 2014 30
Model Verification: Frequency Domain
• Compare Circuit AC Sweep to Field Simulation
1 meter Works for Long or Short Length Low or High Frequency
DC 100MHz
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© 2011 ANSYS, Inc. September 9, 2014 31
Separate CM/DM Voltage by LISN
Waveform CM Voltage: Vcm DM Voltage: Vdm
Common Mode Voltage(Vcm) , Differential Mode Voltage(Vdm)
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© 2011 ANSYS, Inc. September 9, 2014 32
FFT: Waveform changes to Frequency domain
Common Mode Nose is over the CISPR regulations
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© 2011 ANSYS, Inc. September 9, 2014 33
Mechanical ROM
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© 2011 ANSYS, Inc. September 9, 2014 34
Simplorer – Model Order Reduction
1. Simplorer - ANSYS Mechanical Link
• Reduced Order Model from ANSYS to Simplorer (State-space)
From ~45,000 equations to 18 states and 6 terminals (Rotational and translational for each DOF)
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© 2011 ANSYS, Inc. September 9, 2014 35
Four Masses with Four Rotational DOFs: Free Simulation
Rotational Torque source
1Nm Torque
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© 2011 ANSYS, Inc. September 9, 2014 36
4DOF: Free Simulation Results
Simplorer
ANSYS Mechanical
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© 2011 ANSYS, Inc. September 9, 2014 37
Simplorer – RBD Co-Simulation
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© 2011 ANSYS, Inc. September 9, 2014 38
Embedded Software SCADE Suite
Battery CFD - Fluent
P.E. Simplorer Characterization
IGBT CFD Icepak
Electric Motor CEM Maxwell
Sensor CEM Maxwell
A to D VHDL-AMS Simplorer
Q3D L,R,C
ANSYS Mechanical FEA
Temperature profile Current profile
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© 2011 ANSYS, Inc. September 9, 2014 39
Thank You