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FSAE Instrumentation

FSAE Instrumentation. Presentation 12-04-07 Bret Isbell Al Mukmin Paul Otto Miguel Roncal Jud Ryckman Walter Thorn. FSAE/Project Application. FSAE Racecar Instrumenting engine and suspension characteristics Data aquisition using various on-board sensors

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FSAE Instrumentation

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  1. FSAE Instrumentation Presentation 12-04-07 Bret Isbell Al Mukmin Paul Otto Miguel Roncal Jud Ryckman Walter Thorn

  2. FSAE/Project Application • FSAE Racecar • Instrumenting engine and suspension characteristics • Data aquisition using various on-board sensors • Data analysis/Graphical user interface

  3. Hardware Options Options • National Instruments / cRIO -  (see next slide) • Budget - http://www.advantagemotorsports.com/PCG.htm     $700; Low resolution, not expandable • Build from scratch - Overly time consuming and technically too advanced • MoTec - Very capable, but costs above $5000 -All options require the purchase of additional sensors (about $2000)

  4. Benefits of NI & the cRIO • Free (already in our possession) • LabVIEW is a good development environment • LabVIEW is taught at Vanderbilt and free to students • We have contact with the local NI rep (Roger Hebert) • Small & portable, yet very capable & expandable

  5. NI cRIO

  6. Must haves:     -Shock Position/Rate        -Lat./Long. Accel   -Wheel Speed    -Engine RPM    -Oil Pressure    -Throttle Position    -Steering Position    Would be nice: -Brake Pressure    -Tire, Ambient, Water, Exhaust, Oil Temps-Wheel Load    Could Measure:    -Fuel Consumption Rate   -Fuel, Oil, Coolant Levels-Tire Pressure    -Ride Height    -Chassis Slip Angle    System Requirements - Measureables

  7. Measureables (cont.) Determine how often along the track we want to measure each sensor...

  8. System Requirements - Environmental • Electrical Magnetic Interference (EMI) - how to measure? • Water Exposure - either a waterpoof hardware interface, or a waterproof enclosure for the cRIO; water-resistant sensors • Vibration - measure? • Temperature - normal air temp. (40-90 F) • Weight - total system weight <20 lbs • Size - car has a 10"x12"x5" space available • Packaging - building a secure wiring harness • External Forces - in a location to minimize air resistance; out of the driver's way • Triggering - [derived based on storage capacity]

  9. System Requirements - Operational •     Triggering [derived] •     Data Transfer - download from cRIO to a computer •     Storage Capacity - 40 minutes minimum •     SAE stand alone compliance [next slide] •     User Interface •     Accessibility •     Filtering •     Math channels •     Visual/Display •     Data collection rates (Derived)

  10. FSAE Stand-Alone Requirements A "stand-alone data acquisition system" is a system that:-Monitors and records only.-Has no control or display function.-Is removable without affecting the running of the vehicle, i.e. it is in a separate "box".If the system meets these requirements, it does not have to be added to the cost of the vehicle for the FSAE competition.

  11. Currently have:  NI 9205 (32 channels)  NI 9215 (4 channels) Input voltages are variable Other modules available if needed Datasheets available here The cRIO has 64MB of internal memory Assuming we use all channels of both models, sampling at the max rate possible, this would yield a file size of 64MB after ~58 minutes of transfer time. This meets & exceeds our system requirement for storage capacity cRIO Modules, storage capacity

  12. Current Progress • LabVIEW 8.2 & FPGA will be available on Vandy's server before the end of the semester • Hardware Sensor Selection, Pricing • Proof of Concept Test with cRIO and pressure transducer • Website

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