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Development of a Mini-UAV for Urban Environments. Tony Dodd and Beniamin Apopei. Overview. UAVs@Sheffield The urban environment The challenges Quadrotor MAV Future plans. UAVs@Sheffield. Platform development Control, mission planning, co-operative UAVs
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Development of a Mini-UAV for Urban Environments Tony Dodd and Beniamin Apopei
Overview • UAVs@Sheffield • The urban environment • The challenges • Quadrotor MAV • Future plans IET Seminar on Micro UAVs
UAVs@Sheffield • Platform development • Control, mission planning, co-operative UAVs • Simulation/hardware-in-the-loop co-simulation • Communications (wireless, fibre optics) • Smart and morphing structures • Advanced composites • Aerodynamics and design optimisation • Energy management IET Seminar on Micro UAVs
Industrial links/projects • Three Rolls-Royce UTCs • Boeing sponsored AMRC • ASTRAEA • Blue Bear Systems Research • Home Office • EADS • SEAS DTC? IET Seminar on Micro UAVs
Technology carrier platform MAV group project Autonomous control (inertial and GPS) … UG/MSc Projects IET Seminar on Micro UAVs
WUN Intelligent UAV Group • 19 research led universities • UK, Europe, US, China, Australia, Canada • Brings together world’s leading experts • Collaboration, funding and exchange IET Seminar on Micro UAVs
Security Military Communications relay Pollution monitoring Police and surveillance Traffic monitoring Fire brigade Search and rescue Crowd control Building inspection Mapping ... Urban Applications IET Seminar on Micro UAVs
MoD Grand Challenge • “Create a system with a high degree of autonomy that can detect, identify, monitor and report a comprehensive range of military threats in an urban environment” [7] • www.challenge.mod.uk [7] IET Seminar on Micro UAVs
The Urban Environment [1] IET Seminar on Micro UAVs
The Urban Environment [1] [2] IET Seminar on Micro UAVs
The Urban Environment [1] [2] [3] IET Seminar on Micro UAVs
The Urban Environment [1] [2] [3] IET Seminar on Micro UAVs
The Challenges • Simultaneous location and mapping (SLAM) • Autonomous/semi-autonomous control • Collision avoidance • Gusting and turbulence • Reliable wireless communications • Stealth • Power and energy management • User interface/mission management • Portable IET Seminar on Micro UAVs
Urban UAVs • Fixed wing – OTH reconnaissance (superior range and endurance) [6] IET Seminar on Micro UAVs
Urban UAVs • Fixed wing – OTH reconnaissance (superior range and endurance) • Rotary wing – urban operation (between and inside buildings) IET Seminar on Micro UAVs
Urban UAVs • Fixed wing – OTH reconnaissance (superior range and endurance) • Rotary wing – urban operation (between and inside buildings) • Advanced rotary/flapping wing (indoors) [5] IET Seminar on Micro UAVs
Urban UAVs • Fixed wing – OTH reconnaissance (superior range and endurance) • Rotary wing – urban operation (between and inside buildings) • Advanced rotary/flapping wing (indoors) • Lighter than air? [4] IET Seminar on Micro UAVs
Quadrotor MAV Design requirements: • VTOL • Stable and highly manoeuvrable • All electric • Indoor and outdoor operation • Flight time > 10 min • MTOW > 3.5kg (initial prototype > 400g) • Portable and robust IET Seminar on Micro UAVs
Why Quadrotor? • Very efficient – all power to lift • Better payload/size ratio – compact • More stable • More manoeuvrable • More robust/fault tolerant IET Seminar on Micro UAVs
Sensors Inertial measurement unit GPS Firewire cameras Ultrasonic Laser Power Brushless motors Tilting, counter-rotating props (+ configuration) Lithium polymer batteries Structure Glass and carbon fibre chassis Processing Microcontroller Dual FPGA-DSP processors (Firewire ports) COTS Components [8] [9] [10] IET Seminar on Micro UAVs
Quadrotor Prototype I IET Seminar on Micro UAVs
IMU Development • COTS gyros and accelerometers (Analog Devices) • Gyros - 300 deg/s • Accelerometers - 2g • PCB design • Analogue to digital conversion by microcontroller • Very low cost < £200 IET Seminar on Micro UAVs
Simulation and control IET Seminar on Micro UAVs
Simulation and control • Lyapunov stability analysis – hovering operating point • Input coupling/correlation analysis • Hovering control • Nonlinear control – simulation • Tuned PID – simulation and real IET Seminar on Micro UAVs
User interface IET Seminar on Micro UAVs
Quadrotor Prototype II IET Seminar on Micro UAVs
Tiltrotor Mechanism IET Seminar on Micro UAVs
Video IET Seminar on Micro UAVs
Future plans Technical challenges • Sensor fusion • Navigation and collision avoidance • SLAM • Active/passive vibration suppression User interface/mission management Batteries and structure Testing and applications IET Seminar on Micro UAVs
References [1] http://www.americasarmy.com/gallery/index.php?id=27 [Accessed 2 February 2007] [2]http://www2.soros.org/photogalleries/mw_gallery.php?series=/resources/events/mw9/hemmerle/ [Accessed 2 February 2007] [3] http://www.actionla.org/Iraq/IraqReport/iraq_gallery_03/pages/IMGP0060.html [Accessed 2 February 2007] [4] http://www.otherlandtoys.co.uk/silver-mylar-blimp-envelope-p-941.html [Accessed 2 February 2007] [5] http://bicoreeos.solarbotics.net/mav.html [Accessed 2 February 2007] [6] http://www.nd.edu/~mav/photo.htm [Accessed 2 February 2007] [7] http://www.challenge.mod.uk [Accessed 3 February 2007] [8] http://www.traquair.com/ [Accessed 3 February 2007] [9] http://www.unibrain.com/Products/VisionImg/Fire_i_BC.htm [Accessed 3 February 2007] [10] http://www.xsens.com/ [Accessed 3 February 2007] IET Seminar on Micro UAVs