nasa aeronautics research institute real-time onboard ... · • flight test techniques for rich...
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![Page 1: NASA Aeronautics Research Institute Real-Time Onboard ... · • Flight Test Techniques for Rich Data Content – Multi-axes inputs over large range of flight conditions – Piloted](https://reader036.vdocuments.mx/reader036/viewer/2022071019/5fd323e0c4a42772d708b073/html5/thumbnails/1.jpg)
NASA Aeronautics Research Institute
Real-Time Onboard Global Nonlinear Aerodynamic
Modeling from Flight Data
NASA Aeronautics Research Mission Directorate (ARMD) 2014 Seedling Technical Seminar
February 19–27, 2014
Jay Brandon Eugene Morelli
![Page 2: NASA Aeronautics Research Institute Real-Time Onboard ... · • Flight Test Techniques for Rich Data Content – Multi-axes inputs over large range of flight conditions – Piloted](https://reader036.vdocuments.mx/reader036/viewer/2022071019/5fd323e0c4a42772d708b073/html5/thumbnails/2.jpg)
NASA Aeronautics Research Institute
Outline
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 2
• Background • Test Aircraft and Equipment • Flight Test Maneuvers • Aerodynamic Modeling • Example Results - Demo • Dissemination • Next Steps • Closing Remarks
![Page 3: NASA Aeronautics Research Institute Real-Time Onboard ... · • Flight Test Techniques for Rich Data Content – Multi-axes inputs over large range of flight conditions – Piloted](https://reader036.vdocuments.mx/reader036/viewer/2022071019/5fd323e0c4a42772d708b073/html5/thumbnails/3.jpg)
NASA Aeronautics Research Institute
Research Goal
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 3
• Ultimate Goal: Self-Learning and Autonomously-Adapting Vehicles
• Potential for High Impact In Three Primary Areas: – Safety – Reliability – Design/Development Efficiency
Technology Enablers Required: Computer Processing Capabilities System Identification Advances
• Non-linear aerodynamic modeling • Real-time system identification
Flight Control Theory Advances • Adaptive flight control algorithms
Short-circuit the current process…
…with a new paradigm
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NASA Aeronautics Research Institute
Phase I Progress
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 4
• Nonlinear Aerodynamic System Identification – No model structure specification
required – Large flight envelope with single model – Post-flight analysis
• Flight Test Techniques for Rich Data Content – Multi-axes inputs over large range of
flight conditions – Piloted adaptation of similar orthogonal
input techniques • Blending of Data from Different Sources
– Ship research data acquisition system – iPad internal sensors for inertial data
and GPS
0 50 100 150-0.25
-0.2
-0.15
-0.1
-0.05
0
0.05
0.1
0.15
0.2
Cm
Time, sec
FlightModel, R2 = 0.9649
-10 0 10 20 30 40-0.2
0
0.2
0.4
0.6
0.8
1
1.2
1.4
CN
orm
al
α, deg
FlightModel, R2 = 0.9963
-5 0 5 10 15 20 25 30 35-0.04
-0.02
0
Cmα, p
er d
eg
DF9C4
-5 0 5 10 15 20 25 30 35-0.03
-0.02
-0.01
0
Cmδe
, per
deg
-5 0 5 10 15 20 25 30 350
2
4x 10-3
Cmα-
dot, p
er d
eg/s
ec
-5 0 5 10 15 20 25 30 35-20
-10
0
Cmqh
at
α, deg
FuzzyLESQ
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NASA Aeronautics Research Institute
Test Aircraft
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 5
• Large flight envelope, aerobatic capability • Well instrumented:
α /β on nose boom, dynamic pressure, engine rpm, fuel flow accelerations, angular rates, and controls real-time data in aft cockpit and telemetered to the ground
Aermacchi Impala MB-326M
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NASA Aeronautics Research Institute
Flight Test Setup
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 6
• Standard Front Cockpit • Onboard Instrumentation • Real-time Analysis Computer
mounted in Aft Cockpit
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NASA Aeronautics Research Institute
Flight Test Maneuvers
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 7
![Page 8: NASA Aeronautics Research Institute Real-Time Onboard ... · • Flight Test Techniques for Rich Data Content – Multi-axes inputs over large range of flight conditions – Piloted](https://reader036.vdocuments.mx/reader036/viewer/2022071019/5fd323e0c4a42772d708b073/html5/thumbnails/8.jpg)
NASA Aeronautics Research Institute
Video of Typical Maneuver
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 8
![Page 9: NASA Aeronautics Research Institute Real-Time Onboard ... · • Flight Test Techniques for Rich Data Content – Multi-axes inputs over large range of flight conditions – Piloted](https://reader036.vdocuments.mx/reader036/viewer/2022071019/5fd323e0c4a42772d708b073/html5/thumbnails/9.jpg)
NASA Aeronautics Research Institute
In-Flight Aerodynamic Modeling
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 9
FLIGHT TEST MANEUVER
DATA CONDITIONING
NONLINEAR AERODYNAMIC MODELING ALGORITHMS: FUZZY LOGIC
MULTIVARIATE ORTHOGONAL FUNCTIONS
MODEL VALIDATION DATA FROM OTHER MANEUVERS
MEASURED DATA
FINAL MODEL
Explanatory variables: Response variables: α, β, p, q, r, δe , δa , δr , M, RPM, … CX , CY , CZ , Cl , Cm , Cn
![Page 10: NASA Aeronautics Research Institute Real-Time Onboard ... · • Flight Test Techniques for Rich Data Content – Multi-axes inputs over large range of flight conditions – Piloted](https://reader036.vdocuments.mx/reader036/viewer/2022071019/5fd323e0c4a42772d708b073/html5/thumbnails/10.jpg)
NASA Aeronautics Research Institute
Maneuver Example
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 10
-6 -5 -4 -3 -2 -1 0 1 2 3 46
8
10
12
14
16
18
20
22
24
β (deg)
α (
deg)
-15 -10 -5 0 5 10 15 20-8
-6
-4
-2
0
2
4
6
δa (deg)
δ r (de
g)
-20 -15 -10 -5 0 5 10 15-4
-3
-2
-1
0
1
2
3
p (deg/s)
r (d
eg/s
)
-6 -5 -4 -3 -2 -1 0 1 2 3 4-8
-6
-4
-2
0
2
4
6
β (deg)
δ r (de
g)
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NASA Aeronautics Research Institute
Maneuver Guidance Display
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 11
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NASA Aeronautics Research Institute
Modeling Display
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 12
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NASA Aeronautics Research Institute
Real-Time Demo
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 13
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NASA Aeronautics Research Institute
Dissemination of Research
• Publications – NASA TM-2012-217778 – Phase I Results
• Lectures / Presentations – SFTE Meeting September 2013 – NASA Dryden Controls & Dynamics Presentation
September 2013 – ICAST Presentation February 2014
• Upcoming Events – Invited Lecture SETP Symposium March 2014 – Invited Lecture ACGCS Meeting March 2014 – AIAA Paper June 2014
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 14
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NASA Aeronautics Research Institute
Next Steps
• Improve Modeling & Prediction Capabilities – Thrust vs aero effects – Full fuzzy model generation inflight
• Automate Data Collection – Real-time monitoring of flight data and
autonomous selection of data suitable for modeling and prediction
• Flight Controls – Use updated models for updated control
algorithms – Real-time checking of model adequacy
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 15
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NASA Aeronautics Research Institute
Closing Remarks
• Near Real-time Aero Modeling – Self-learning and monitoring vehicles – Rapid development – Robust flight control
• Demonstrated Successful Modeling Inflight – All axes, large envelope, nonlinear – Complete aero model ready before landing – Two methods giving similar results
• Great Project Model – Small closely-working team – Minimal administrative burdens
February 19–27, 2014
NASA Aeronautics Research Mission Directorate 2014 Seedling Technical Seminar 16