SLIDE 1
Overview
- Flight hazards in the urban wind field
- Flying anemometer for measurement of urban wind fields
- Vehicle dynamic response
- Unmanned Aircraft Traffic Management in Ohio
Safe and Efficient Navigation of UAS in the Urban Environment Jim - - PowerPoint PPT Presentation
Safe and Efficient Navigation of UAS in the Urban Environment Jim - - PowerPoint PPT Presentation
Safe and Efficient Navigation of UAS in the Urban Environment Jim Gregory Professor, Dept of Mechanical & Aerospace Engineering Director, Aerospace Research Center gregory.234@osu.edu 614-292-5024 Overview Flight hazards in the urban
SLIDE 2
SLIDE 3
FLIGHT HAZARDS
SLIDE 4
Urban Wind Fields
4
Isolated Roughness Flow Wake Interference Flow Skimming Flow
Zajic, D., et al (2011)
SLIDE 5
Vortex Ring State
- Loss of vehicle control,
thrust
- Random, violent pitch and
yaw motions (Johnson, 2004)
- Formation of large, unsteady
toroidal structure
- Limited descent speed
5
Johnson, 2005
SLIDE 6
FLYING ANEMOMETER
SLIDE 7
Drone Flights in Gusting Urban Wind Fields: Wake Response
Thorpe et al. AIAA 2018-4218 Sutkowy et al. AHS 74-2018-0135
SLIDE 8
Flying Anemometer
8
- A UAV mounted anemometer will be used to acquire high-frequency
wind field characteristics
- Can be positioned anywhere desired
Thorpe et al. AIAA 2018-4218
SLIDE 9
Atmospheric Measurements
9
Thorpe et al. AIAA 2018-4218
SLIDE 10
Atmospheric Measurements
- Building wake survey
– 12-m roof-level – 5-m leeward side – Airfield center freestream
- 5-minute/location survey
SLIDE 11
Atmospheric Measurements
- Distinct increase in large
scale turbulent structures in wake of building roof
- Reduction in turbulence
intensity in leeward shadow
- 16 Hz spike due to vehicle
vibration
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VEHICLE RESPONSE
SLIDE 13
Quadcopter Flight Mechanics
Singhal et al. AHS 75-2019-0391
SLIDE 14
Quadcopter Flight Mechanics
Singhal et al. AHS 75-2019-0391
SLIDE 15
Dynamic Maneuvers
Singhal et al. AHS 75-2019-0391
SLIDE 16
Unmanned Aircraft Traffic Management for Ohio
Jim Gregory Professor, Mechanical and Aerospace Engineering Director, Aerospace Research Center
SLIDE 17
Unmanned Aircraft Traffic Management
Turnkey UTM solution for the US 33 Smart Corridor, and a scalable solution for Ohio.
SLIDE 18
Active Radar and Spectrum Sensing
R1400 Active Radar S1200 RF Spectrum Sensor
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Passive Radar
- Radar system utilizing existing
“illuminators of opportunity”
– No active transmitter (no FCC license necessary) – Tuned to receive cell, digital TV, radio,
- etc. signals
– Equivalent performance to active radar systems
- Low-cost, scalable solution
– Simple hardware components – Distributed processing network
- Fills gaps between active radar
coverage areas – critical for statewide implementation of UTM
- Higher risk research, higher reward
SLIDE 20
UAS Radar Cross Section Measurement
- Develop extensive library of
UAS RCS signatures
– Expansion of existing RCS library developed at OSU Electro Science Laboratory – Multi-band characterization for active and passive radar systems – Provides truth data for active and passive radar systems
SLIDE 21
UAS Service Supplier AiRXOS Autonomous Services Platform
Key Integrated Services
- UAV traffic
management
- Coordinated airspace
management
- Flight and operational
authorization
- Conformance
monitoring
- Public and private UTM options
- Cyber-secure architecture
- Integrated with non-cooperative detection solution
SLIDE 22
Summary
- Flight Hazards in the Urban Wind Environment
- Flying Anemometer
- Quadcopter Response
- UTM