design weekend poster v3
Post on 21-Jan-2017
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PURDUE Hyperloop Team
Air bearing levitation Pressurized tank supply
Sustained levitation 90s for 552 lbs 50s for max payload
Provides 0.0394in [1mm] air cushion AlumiRes (RC-3) urethane, cast in-house
Levitation
Structures
Lightweight skin of bi-directional, double ply carbon fiber.
Mounting brackets machined from 2024 aluminum Nomex core for loadbearing structural elements Floor Deck Chassis
1
Aerodynamics
Flow Visualization
Optimized pod shape using Bezier control points
Design to reduce drag Analyzed with ANSYS Fluent
Type of Battery: ANR26650M1-B LiFePO4 Cylindrical CellsBattery Specs: 3.3 V, 2.5 Ah, 8 Wh, 50 A continuous
Power
Emergency Operation Mode: 12 V
System Power Requirement
Emergency Wheel System
288 W
Braking 1056 W
Total ~1344 W
Normal Operation Mode: 12 V
System Power Requirement
Avionics and Altitude Control
1500 W
Braking 1056 W
Levitation 288 W
Total ~2844 W 90 batteries Rechargeable 49.5 V per pack Buck converter steps
down to 12 volts Each system has its
own converter
Project Manager: Paul Witsberger Assistant Project Manager: Megan SmithFaculty Advisors: Dr. Alina Alexeenko, Dr. Guillermo Paniagua
Attitude Control
4 magnetic thrusters Rotating Halbach
arrays Stepper motors tilt
the mechanism for Stabilization Thrust Braking
Minimal deflection during normal acceleration periods
Crumple zone at front edge of pod mitigates crash damage
Parameter Value
Lift Coefficient,
CL
0.262
DragCoefficient,
CD
0.518
Braking and Propulsion
Propulsion Compressed air propulsion 19.3 lbf (86N) of thrust for 10 seconds Single nozzle is integrated into SpaceX Pusher interface Reduces track time by approximately 5%
Braking Two braking regimes High to low speed, magnetic Low speed to stop, friction
2.4 Gs of constant deceleration Utilize center rail for both regimes
Central air supply
Machined channelsGap Height,
in [mm]Pod Speed, ft/s [m/s]
Required Mass Flow, kg/s [lbm/s]
0.0394 [1] 328 [100] 0.414 [0.1878]
0.0591 [1.5] 328 [100] 1.281 [0.5810]
0.0394 [1] 0 0.3369 [0.1528]
0.0591 [1.5] 0 1.137 [0.5158]Air bearing pressure distributions for different slot and hole orientations
Avionics Network
Dimensions: 120 length, 38 height, 36 widthMass: 552 lbm (250 kg)Travel Time: 19.3 secOperating Pressure: 0.02 psiBudget: $30,000Payload Capability: 15.3%Unique Features: -Air bearing levitation-Low mass and power-Passenger seat