Assessing perceptions and alerts of tractor instability

Nicolas Ochoa Lleras, Sean N. Brennan, Dennis James Murphy, Jennifer M. Klena, Philip M. Garvey, Henry Joseph Sommer, III

Research output: Contribution to journalArticle

Abstract

This paper presents ongoing results from a Tractor Driving Simulator study at Penn State University studying how tractor overturn events can be prevented. The simulator is used to expose subjects, in a controlled environment, to situations that would be unsafe to test in the field. Two sets of experiments are examined here. The first experiment consisted of a tilt perception study whose goal was to quantify the ability of subjects to remember and reproduce certain poses with pitch and roll angles. Nineteen subjects were individually exposed to a tilt angle; then, they used a controller to drive the simulator until they perceived they have reached the exposure angle; the process was repeated with 28 different poses representing combinations of pitch and roll of the tractor cabin. Overall, subjects reproduced angles with a smaller amplitude than they were exposed to, indicating that they were overestimating their tilt angles while actively controlling the cabin angle. Roll angles presented an overestimation of 8%, while pitch was accurately reproduced. There was no statistically significant difference between experienced tractor operators and non-experienced subjects, nor any significant influence of pitch angle on roll perception, or vice versa. The second experiment compared visual, haptic, and acoustic interfaces to alert a subject that they were driving at a hazardous roll angle. A screen with a bubble display-indicating the pitch and roll angles of the cabin-was enhanced with auditory (buzzers) and haptic (vibration on the steering wheel) alerts. When the simulator cab tilts over a pre-defined safety threshold, an alert was given to the operator along one or more alerting systems. The experiment collected the reaction times of the subjects to each type of alert interface to determine which one was the most effective at capturing the driver's attention.

Original languageEnglish (US)
Pages (from-to)7-12
Number of pages6
JournalChemical Engineering Transactions
Volume58
DOIs
StatePublished - Jan 1 2017

Fingerprint

Simulators
Experiments
Wheels
Acoustics
Display devices
Controllers

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

Cite this

Lleras, Nicolas Ochoa ; Brennan, Sean N. ; Murphy, Dennis James ; Klena, Jennifer M. ; Garvey, Philip M. ; Sommer, III, Henry Joseph. / Assessing perceptions and alerts of tractor instability. In: Chemical Engineering Transactions. 2017 ; Vol. 58. pp. 7-12.
@article{0761e74969324f1eba57cd5500136beb,
title = "Assessing perceptions and alerts of tractor instability",
abstract = "This paper presents ongoing results from a Tractor Driving Simulator study at Penn State University studying how tractor overturn events can be prevented. The simulator is used to expose subjects, in a controlled environment, to situations that would be unsafe to test in the field. Two sets of experiments are examined here. The first experiment consisted of a tilt perception study whose goal was to quantify the ability of subjects to remember and reproduce certain poses with pitch and roll angles. Nineteen subjects were individually exposed to a tilt angle; then, they used a controller to drive the simulator until they perceived they have reached the exposure angle; the process was repeated with 28 different poses representing combinations of pitch and roll of the tractor cabin. Overall, subjects reproduced angles with a smaller amplitude than they were exposed to, indicating that they were overestimating their tilt angles while actively controlling the cabin angle. Roll angles presented an overestimation of 8{\%}, while pitch was accurately reproduced. There was no statistically significant difference between experienced tractor operators and non-experienced subjects, nor any significant influence of pitch angle on roll perception, or vice versa. The second experiment compared visual, haptic, and acoustic interfaces to alert a subject that they were driving at a hazardous roll angle. A screen with a bubble display-indicating the pitch and roll angles of the cabin-was enhanced with auditory (buzzers) and haptic (vibration on the steering wheel) alerts. When the simulator cab tilts over a pre-defined safety threshold, an alert was given to the operator along one or more alerting systems. The experiment collected the reaction times of the subjects to each type of alert interface to determine which one was the most effective at capturing the driver's attention.",
author = "Lleras, {Nicolas Ochoa} and Brennan, {Sean N.} and Murphy, {Dennis James} and Klena, {Jennifer M.} and Garvey, {Philip M.} and {Sommer, III}, {Henry Joseph}",
year = "2017",
month = "1",
day = "1",
doi = "10.3303/CET1758002",
language = "English (US)",
volume = "58",
pages = "7--12",
journal = "Chemical Engineering Transactions",
issn = "1974-9791",
publisher = "AIDIC-Italian Association of Chemical Engineering",

}

Assessing perceptions and alerts of tractor instability. / Lleras, Nicolas Ochoa; Brennan, Sean N.; Murphy, Dennis James; Klena, Jennifer M.; Garvey, Philip M.; Sommer, III, Henry Joseph.

In: Chemical Engineering Transactions, Vol. 58, 01.01.2017, p. 7-12.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Assessing perceptions and alerts of tractor instability

AU - Lleras, Nicolas Ochoa

AU - Brennan, Sean N.

AU - Murphy, Dennis James

AU - Klena, Jennifer M.

AU - Garvey, Philip M.

AU - Sommer, III, Henry Joseph

PY - 2017/1/1

Y1 - 2017/1/1

N2 - This paper presents ongoing results from a Tractor Driving Simulator study at Penn State University studying how tractor overturn events can be prevented. The simulator is used to expose subjects, in a controlled environment, to situations that would be unsafe to test in the field. Two sets of experiments are examined here. The first experiment consisted of a tilt perception study whose goal was to quantify the ability of subjects to remember and reproduce certain poses with pitch and roll angles. Nineteen subjects were individually exposed to a tilt angle; then, they used a controller to drive the simulator until they perceived they have reached the exposure angle; the process was repeated with 28 different poses representing combinations of pitch and roll of the tractor cabin. Overall, subjects reproduced angles with a smaller amplitude than they were exposed to, indicating that they were overestimating their tilt angles while actively controlling the cabin angle. Roll angles presented an overestimation of 8%, while pitch was accurately reproduced. There was no statistically significant difference between experienced tractor operators and non-experienced subjects, nor any significant influence of pitch angle on roll perception, or vice versa. The second experiment compared visual, haptic, and acoustic interfaces to alert a subject that they were driving at a hazardous roll angle. A screen with a bubble display-indicating the pitch and roll angles of the cabin-was enhanced with auditory (buzzers) and haptic (vibration on the steering wheel) alerts. When the simulator cab tilts over a pre-defined safety threshold, an alert was given to the operator along one or more alerting systems. The experiment collected the reaction times of the subjects to each type of alert interface to determine which one was the most effective at capturing the driver's attention.

AB - This paper presents ongoing results from a Tractor Driving Simulator study at Penn State University studying how tractor overturn events can be prevented. The simulator is used to expose subjects, in a controlled environment, to situations that would be unsafe to test in the field. Two sets of experiments are examined here. The first experiment consisted of a tilt perception study whose goal was to quantify the ability of subjects to remember and reproduce certain poses with pitch and roll angles. Nineteen subjects were individually exposed to a tilt angle; then, they used a controller to drive the simulator until they perceived they have reached the exposure angle; the process was repeated with 28 different poses representing combinations of pitch and roll of the tractor cabin. Overall, subjects reproduced angles with a smaller amplitude than they were exposed to, indicating that they were overestimating their tilt angles while actively controlling the cabin angle. Roll angles presented an overestimation of 8%, while pitch was accurately reproduced. There was no statistically significant difference between experienced tractor operators and non-experienced subjects, nor any significant influence of pitch angle on roll perception, or vice versa. The second experiment compared visual, haptic, and acoustic interfaces to alert a subject that they were driving at a hazardous roll angle. A screen with a bubble display-indicating the pitch and roll angles of the cabin-was enhanced with auditory (buzzers) and haptic (vibration on the steering wheel) alerts. When the simulator cab tilts over a pre-defined safety threshold, an alert was given to the operator along one or more alerting systems. The experiment collected the reaction times of the subjects to each type of alert interface to determine which one was the most effective at capturing the driver's attention.

UR - http://www.scopus.com/inward/record.url?scp=85026373296&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85026373296&partnerID=8YFLogxK

U2 - 10.3303/CET1758002

DO - 10.3303/CET1758002

M3 - Article

AN - SCOPUS:85026373296

VL - 58

SP - 7

EP - 12

JO - Chemical Engineering Transactions

JF - Chemical Engineering Transactions

SN - 1974-9791

ER -