Momentum - March 2018 - 6

STUDENT
FEATURE

GENERATION

ALL QUIET ON THE

SNOWMOBILE FRONT

The Michigan Tech Clean
Snowmobile team's sled
(foreground) in action
at the 2107 SAE Clean
Snowmobile Challenge.

Two mechanical engineering students at Michigan Technological
University chose snowmobile noise attenuation as the topic of their
senior design project.
FOR THE 2018 SAE CLEAN SNOWMOBILE COMPETITION
slated for March 5-10 in Houghton, Mich., the Michigan
Tech Clean Snowmobile team will be competing with
a 2016 Yamaha Venture BAT snowmobile. Through
generous support from Yamaha Motor Corp., three Best
Available Technology (BAT) snowmobiles were loaned
to MTU for testing and potential improvement for a more
sustainable future.
Of the three loaned snowmobiles, one was
disassembled to allow the engine to be relocated to the
Michigan Tech undergraduate dynamometer facility.
The engine sub-team has worked diligently to mate the
new engine platform with a MoTech engine control unit
(ECU) that is compatible with the electronic throttle
control on the competition snowmobile. Additionally, the
spare chassis parts were utilized for prototyping so that
original parts were saved to allow for stock configuration
to be re-instituted as needed.
6 March 2018

THE GOAL
One of the team's primary goals for the 2018 SAE competition is to pass
the SAE J1161 noise test as conducted by the staff and judges. For the
competition's Noise Event, a snowmobile is driven through a marked
150-ft-long recording area at a steady-state speed of 35 mph. A binaural
recording system is placed halfway through the recording area, at a 50ft perpendicular offset to the snowmobile direction of travel.
To pass the test, the A-weighted, slow response maximum level must
be lesser than or equal to 67 dBA. To allow for changing atmospheric
conditions that could affect results, an overshoot of 2 dBA is still
considered passing.
One of the MTU senior design teams for the 2017-2018 academic
year was tasked with characterizing the sound profile of the Yamaha
Venture snowmobile. The primary focus of the team was to characterize
the sound profile of the snowmobile and determine leading causes of
audible, high-intensity noise generation.
For noise data recording, our team utilized a Larson Davis LXT
MOMENTUM



Momentum - March 2018

Table of Contents for the Digital Edition of Momentum - March 2018

Momentum - March 2018
Contents
Companies mine talent at CDS competitions
All quiet on the snowmobile front
Monash University a double winner at Formula SAE-Australia
A return to glory days?
Setting the record straight on Baja SAE technical inspection
Paccar reveals new and future tech at CES 2018
OA-X contender moonlights as AFRL testbed
Chevy unveils larger, lighter 2019 Silverado
Students get the spotlight at SAE Carolina Section meeting
SAE 101: WCX World Congress Experience
More U.S.-born faculty: a university responsibility
Dossier: Lauren Goulet of John Deere
Help yourself by helping others
Just announced: new student scholarships—apply by March 15
Momentum - March 2018 - Momentum - March 2018
Momentum - March 2018 - Cover2
Momentum - March 2018 - Contents
Momentum - March 2018 - Companies mine talent at CDS competitions
Momentum - March 2018 - 3
Momentum - March 2018 - 4
Momentum - March 2018 - 5
Momentum - March 2018 - All quiet on the snowmobile front
Momentum - March 2018 - 7
Momentum - March 2018 - 8
Momentum - March 2018 - 9
Momentum - March 2018 - Monash University a double winner at Formula SAE-Australia
Momentum - March 2018 - 11
Momentum - March 2018 - A return to glory days?
Momentum - March 2018 - 13
Momentum - March 2018 - Setting the record straight on Baja SAE technical inspection
Momentum - March 2018 - 15
Momentum - March 2018 - Paccar reveals new and future tech at CES 2018
Momentum - March 2018 - OA-X contender moonlights as AFRL testbed
Momentum - March 2018 - Chevy unveils larger, lighter 2019 Silverado
Momentum - March 2018 - Students get the spotlight at SAE Carolina Section meeting
Momentum - March 2018 - SAE 101: WCX World Congress Experience
Momentum - March 2018 - More U.S.-born faculty: a university responsibility
Momentum - March 2018 - Dossier: Lauren Goulet of John Deere
Momentum - March 2018 - 23
Momentum - March 2018 - Just announced: new student scholarships—apply by March 15
Momentum - March 2018 - Cover3
Momentum - March 2018 - Cover4
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