vehicle systems, dynamics, and design a focus on …...“modular generalized framework for...
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1Vehicle Systems, Dynamics, and Design Laboratory
Vehicle Systems, Dynamics, and Design – a Focus on Novel/Unconventional Configurations
Dr. Imon ChakrabortyAssistant Professor
Department of Aerospace [email protected]
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2Vehicle Systems, Dynamics, and Design Laboratory
About the Speaker
Dr. Imon ChakrabortyAssistant ProfessorDepartment of Aerospace EngineeringAuburn University(August 2018 – present)
Ph.D., Aerospace Engineering (Dec 2015)Georgia Institute of Technology
M.S., Aerospace Engineering (Jul 2011)Georgia Institute of Technology
B.Tech., Mechanical Engineering (May 2009)National Institute of Technology Tiruchirappalli, India
Private Pilot Airplane, Single-Engine, Land(Mar 2013 – present)
Associate MemberAIAA Aircraft Design Technical Committee(Jun 2016 – present)
Research Focus
Flight Mechanics & Controls
Vehicle & Subsystems
Sizing & Analysis
Research Engineer IISchool of Aerospace EngineeringGeorgia Institute of Technology (Jan 2016 – July 2018)
Email: [email protected]
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Research Overview
❑ “Vehicle”
o Conventional configurations +
o Unconventional flight vehicles
❑ “Systems”
o Physics-based sizing of key vehicle (sub)systems
o Performance impact analysis
❑ “Dynamics”
o Simulate flight dynamics; assess stability & control
o Assess operator-friendliness
❑ “Design”
o Capture impacts of the aboveon overall vehicle design
o Demonstrate sizing capabilityfor unconventional concepts
Volocopter e-volo VC200 Aurora Flight Sciences eVTOL
Lilium JetEHANG184 AAV
Airbus A3 Vahana Carter/Mooney SR-C Air Taxi
By no means an exhaustive list!
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4Vehicle Systems, Dynamics, and Design Laboratory
NASA Funding to Study Novel Aircraft S&C Characteristics
❑ VSDDL part of team that recently received funding from NASA LaRC
o 3-year project (1 base year + 2 option years)
o Collaborative proposal between
o Research in Flight (Dr. Vivek Ahuja)
o Auburn University (Dr. Imon Chakraborty, Dr. Roy Hartfield)
❑ “Modular Generalized Framework for Assessing Aircraft Aero-Propulsive, Stability, and Control Characteristics”
o NASA ARMD, NRA “Research Opportunities in Aeronautics”, Subtopic 2.1.6
o Transformative Aeronautics Concepts Program (TACP)
o Transformational Tools and Technologies (TTT) Project
❑ Overarching goal is to bring Stability & Control (S&C) considerations earlier in the design phase for unconventional / novel aircraft configurations
o Distributed Electric Propulsion (DEP) concepts
o Urban Air Mobility (UAM) concepts, etc.
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5Vehicle Systems, Dynamics, and Design Laboratory
NASA Funding to Study Novel Aircraft S&C Characteristics
❑ For DEP/UAM concepts, there are multiple very different modes of flight
❑ Much more significant differences between “power-on” and “power-off” characteristics
❑ Significant coupling between aerodynamic and propulsive loads
o Difficult or impossible to consider aero & propulsion separately
❑ How best to represent aero-propulsive characteristics for
o Stability & control assessments?
o Uncertainty quantification?
o Vehicle flight simulation?
o Vehicle sizing process?
NASA X-57 Maxwell Distributed Electric Propulsion concept
Uber eCRM-001 concept in hover mode
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6Vehicle Systems, Dynamics, and Design Laboratory
NASA Funding to Study Novel Aircraft S&C Characteristics
NASA X-57 Maxwell Distributed Electric Propulsion concept
Uber eCRM-001 concept in hover mode
❑ Joint project will enhance and further develop Flightstream tool
o Developed by Research in Flight
❑ Maintain acceptable balance between analysis fidelity and computational tractability
❑ First phase of project will focus on developing a Stability & Control “Toolbox” in Flightstream
o Allow early design phase assessment of static & dynamic stability characteristics
❑ The end-goal is to be able to better analyze novel aircraft concepts by performing
o Closed-loop control analysis
o Human-in-the-loop flight simulation
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7Vehicle Systems, Dynamics, and Design Laboratory
Flight Simulation Capability – “MADCASP”
❑ MADCASP: Modular Aircraft Dynamics & Control Algorithm Simulation Platform
o MATLAB/Simulink based flight simulation and control development tool
o Implementation will not be vehicle configuration-specific
o Interfaced with FlightGear for visualization of vehicle motion & trajectory
o Both pre-programmed maneuvers and pilot control inputs possible
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8Vehicle Systems, Dynamics, and Design Laboratory
Flight Simulation Capability – Hardware
❑ Location: Gavin 257
❑ Configuration/Setup: Working on it…
❑ Goal: Create a robust, high-utility flight simulation setup that is…
o Competitive with others in academia
o Highly flexible (must simulate different vehicles)
o For both research & instructional applications
Texas A&M Engineering Simulator (EFS) Fixed-base, modified T-37 cockpit
https://vscl.tamu.edu/facility/
Curved high FOV screen with projection system
Image: http://www.simpit.co.nz/index.php/features-2/projection-display-solutions/simpit-270-centurion
NASA X-57 simulator at NASA Armstrong Flight Research Center
https://www.nasa.gov/centers/armstrong/ne
ws/FactSheets/FS-109.html
F-35 Joint Strike Fighter flight simulator setup
(demonstrated at AIAA AVIATION 2018 Conference, Atlanta, GA)
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9Vehicle Systems, Dynamics, and Design Laboratory
Single, Side-by-Side, and Tandem Configurations
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10Vehicle Systems, Dynamics, and Design Laboratory
CAD: Anthony Comer
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11Vehicle Systems, Dynamics, and Design Laboratory
Single-seater – Pilot’s Eye View
Video: Anthony Comer
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12Vehicle Systems, Dynamics, and Design Laboratory
Side-by-Side Seating – Pilot’s Eye View
Video: Anthony Comer
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General Aviation (GA) Aircraft Safety Research
❑ Aviation Department operates Cessna 172’s equippedwith Garmin G1000 glass cockpits out of KAUO
o Collaboration opportunity: data-driven GeneralAviation (GA) safety research, for example…
❑ Touchdown analysis:
o How fast?
o Where?
o What “attitude”?
❑ Real-time monitoring
o Most GA aircraft donot have G1000’s!
o How can portableelectronics be usedfor meaningful, real-time monitoring?
Cessna 172 Skyhawk
Garmin G1000-equipped Cessna 172 cockpit
Auburn University Regional Airport (KAUO)
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14Vehicle Systems, Dynamics, and Design Laboratory
Goal: Sizing of Unconventional Flight Vehicle Concepts
Mass Properties Estimation
Mission Performance
Analysis
Aero-Propulsive Characterization
Sizing of Unconventional Flight Vehicles
Power, Energy, Weight Volume/Dimensions
Initial research focus on these two areas
• How much energy needed?
• How best to utilize >1 energy sources?
• Vehicle weight?• CG location?• Moments of inertia?
• Generate aero deck• Effect of aero-propulsive
interactions?
• How much power? • How much energy?• How heavy?• How big?
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Energy-Based Mission Performance Analysis
❑ Most aircraft flying today use consumable fuel for propulsion (mass reduces over the course of the flight)
❑ This is reflected in the mission analysis methods used in most aircraft sizing tools
❑ “Workarounds” and “tricking the code” needed to account for electric or hybrid-electric propulsion systems
o Not very convenient, often limited
❑ Goal: Create an energy-based mission performance analysis capability equally suited for hybrid, electric, and conventional propulsion systems
https://www.nasa.gov/sites/default/files/thumbnails/image/mod_iv.png
NASA X-57 Maxwell Distributed Electric Propulsion
Reserve
Takeoff LandingHold
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16Vehicle Systems, Dynamics, and Design Laboratory
Energy-Based Mission Performance Analysis
❑ Approach: Implement mission analysis based on the energy reservoir analogy
o Consistent and equivalent treatment of different propulsion systems
o Creation of different power / energy management variables (controls)
❑ Required capabilities & target applications:
o Modularity & uniform applicability to multiple propulsion system types
o Analysis of electric and hybrid-electric propulsion systems
o Research how to size multiple power sources & use multiple energy sources to maximize energy efficiency
Control Effector
Potential Energy
Kinetic Energy
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Propulsion & Energy System
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17Vehicle Systems, Dynamics, and Design Laboratory
Thank you!
❑ Email: [email protected]
❑ Website: www.vsddl.com
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