differences in steering behaviour between experts, experienced and novice drivers: a driving...
TRANSCRIPT
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DIFFERENCES IN STEERING BEHAVIOUR BETWEEN EXPERTS, EXPERIENCED AND NOVICE DRIVERS: A
DRIVING SIMULATOR STUDY
NAMAN SINGH NEGIPrecision and Microsystems Engineering Department
SUPERVISORS:
DR. IR. RIENDER HAPPEEIR. PETER VAN LEEUWEN
Bio-Mechatronics and Bio-Robotics Engineering Department
Mechanical, Maritime and Materials EngineeringDelft University of Technology, Netherlands
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PRESENTATION OUTLINE
1.INTRODUCTION TO THE TOPIC2.PAST RESEARCH3.OBJECTIVES4.EXPERIMENTS
a) RACING EXPERIMENTb) DOUBLE LANE CHANGE EXPERIMENTc) HIGH SPEED CORNERING EXPERIMENT
5.RESULTS AND DISCUSSION6.GENERAL DISCUSSION
a) COMBINED SUMMARY OF THE 3 EXPERIMENTSb) PROS AND CONS OF THE EXPERIMENTS
7. FUTURE RESEARCH
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Growth Of The Automotive Industry1886
Benz patent “vehicle powered by a gas engine”
1908Launch of Model-T
1913-1914 Conveyor belt-based assembly line
1927 A total of 15 million Model T’s sold
INTRODUCTION3
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The Rising Issue of Safety
Road crashesnearly 1.3 million people die each year average 3,287 deaths a day
9th leading cause of death 2.2% of all deaths globally
cost USD $518 billion globallyequivalent to1-2% annual GDP
INTRODUCTION4
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SAFETY LEGISLATION AND MEASURES
INTRODUCTION
1920’s 1930’s 1940’s 1950’s
1924: Safety Glass
1925:windscreen wiper
1950: Disc Brakes
1950: Seat Belts
1960’s 1970’s 1980’s 1990’s
1966: DOT, US
1968: FMVSS 1978: ABS
1974: Air-Bag
1979: Crash testing
1997: EuroNCAP
1995: ESC
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Support the driver in completing a task Complete or Partial Automation of the task
Electronic Stability Control (ESC) System
Issues Setting the threshold
Different driver needs Nuisance (“Cry wolf effect”)
ADVANCED DRIVER ASSIST SYSTEM (ADAS)
INTRODUCTION6
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NOVICE DRIVERfamiliar with the task of driving limited driving experience
EXPERIENCED DRIVERcertain level of expertise driving experience
EXPERT DRIVERShigh level of driving proficiency race car drivers, instructors in driving school
PAST RESEARCH7
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PAST RESEARCH
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Quantifying driver differencesperformance behavior
Focus novice, experienced and expert driverssteering behavior extreme driving (cornering and lane change)
Objective driver metrics performancebehavior
OBJECTIVES9
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10
3 driving simulator based experiments
Expert race drivers versus normal driversHigh speed driving task in a racing environment
Experienced versus novice driversDouble lane changeHigh speed cornering
EXPERIMENTS
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RACING EXPERIMENT
EXPERIMENTS 11
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Lane 1: 15 m
Lane 2: 25 m
Lane 3: 15 m
3.75 m
6.25 m
3.75 m30 m
25 m3 m
3 m
3 m
EXPERIMENTS
DOUBLE LANE CHANGE MANEUVER
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HIGH SPEED CORNERING
EXPERIMENTS
75 m
75 m75 m
75 m
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Curve 1: Long right hand curve, which turns through nearly 200 degrees
Curve 2: Combination of two fast curves
Curve 3: 180 degrees hairpin curve
Driving direction
RACING EXPERIMENT
RESULTS AND DISCUSSION14
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PERFORMANCEexperts
better performance lower lap-times (5 - 7 %)higher lateral acceleration (10 – 15 %)
RESULTS AND DISCUSSION15
Experts higher steering activity steering jerk 1.5-2 times higher in curve 1 and 2
STEERING BEHAVIOR
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-400 -300 -200 -100 0 100 200 300 400 500 600-400
-300
-200
-100
0
100
200
300
X-Direction
Y-D
irect
ion
Total Lap
Curve 1Curve 2
Curve 3
PATH STRATEGY
RESULTS AND DISCUSSION16
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DOUBLE LANE CHANGE (DLC) 3 main steering inputsManeuver A-C Maneuver C-DManeuver D-F
RESULTS AND DISCUSSION17
0 20 40 60 80 100 120-5
-4
-3
-2
-1
0
1
2
3
4
5
X-Direction
Y-D
irect
ion
Speed: 70 km/h
Novices
Experienced
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0 20 40 60 80 100 120-5
-4
-3
-2
-1
0
1
2
3
4
5
X-Direction
Y-D
irect
ion
Speed: 105 km/h
Novices
Experienced
0 20 40 60 80 100 120-5
-4
-3
-2
-1
0
1
2
3
4
5
X-Direction
Y-D
irect
ion
Speed: 70 km/h
Novices
Experienced
Novices offset from center position while entering the first lanedelay in control inputs
-20 0 20 40 60 80 100 120-40
-30
-20
-10
0
10
20
30
40
X-Direction (m)
Ste
erin
g A
ngle
(de
g)
Speed: 70 km/h
Novices
Experienced
-20 0 20 40 60 80 100 120-50
-40
-30
-20
-10
0
10
20
30
40
X-Direction (m)
Ste
erin
g A
ngle
(de
g)
Speed: 105 km/h
Novices
Experienced
RESULTS AND DISCUSSION18
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PERFORMANCE
Average Number Of Cones Hit Per Run
Root Mean Square Deviation From The Mid Path
RESULTS AND DISCUSSION19
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REPEATABILITY
Root Mean Square Deviation From Mean Path
RESULTS AND DISCUSSION20
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higher steering activity (steering rate and steering jerk )S
teeri
ng
Wheel A
ng
le
RESULTS AND DISCUSSION
CONTROL STRATEGY
lower initial maximum steering angle (speed >85)higher steering angle for the other two maneuvers Novices
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Novicesinsufficient initial input imprecise timing
lag behind in terms of input versus vehicle positioningtry to compensate for this lag higher steering activity in the later stagessteering jerk (30%)
RESULTS AND DISCUSSION22
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HIGH SPEED CORNERING TASK
-100 -50 0 50 100 150-20
0
20
40
60
80
100
120
140
160
Curve 1
Curve 2
RESULTS AND DISCUSSION23
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Experienced driversbetter performance lower lap-times (14%)maintain a higher lateral acceleration (14 %) similar to results from the racing experiment
PERFORMANCE
RESULTS AND DISCUSSION24
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Experienced drivershigher steering activity
steering jerk (12%)steering reversal rate(20%)
similar to the results found in the racing experiment
STEERING BEHAVIOR
RESULTS AND DISCUSSION25
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PATH STRATEGY
No particular strategy
Novices higher deviation from their mean path0.68 meters (experts = 0.52 m)p<0.05
RESULTS AND DISCUSSION26
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PERFORMANCERacing Experiment
experts better performance lap-times (5-7%) and lateral acceleration (10-14%)
High Speed Corneringexperiencedbetter performance lap-times (14%) and lateral acceleration (14%)
Double Lane Changeexperiencedbetter performance average number of cones hit mean deviation from mid-path
GENERAL DISCUSSION
COMBINED SUMMARY OF THE 3 EXPERIMENTS27
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COMBINED SUMMARY OF THE 3 EXPERIMENTS
GENERAL DISCUSSION
STEERING BEHAVIORRacing
expertshigher steering activity steering jerk (1.5-2 times)
High Speed Corneringexperiencedhigher steering activity steering jerk (12%) and steering reversal rate (20%)
Double Lane Change :experiencedappropriate control inputs (steering angle)accurate timing of steering input
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OTHER RESULTSSteering metrics
steering jerksteering ratesteering reversal rate timing (position) of steering input
Significant difference in path strategyconsistency in following the strategy
Overlap in performance
GENERAL DISCUSSION
COMBINED SUMMARY OF THE 3 EXPERIMENTS29
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Racing Experiment significant steering behavior differenceshigh speed curve steering jerk 1.5-2 times higher for experts
High speed corneringsignificant steering behavior differences12% difference in steering jerk
DLC testno Degradation of performance with speedskill versus loss of control cannot be correlatedsignificant steering behavior differences30% difference in steering jerk
PROS & CONS OF THE PERFORMED EXPERIMENTS30
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Adaptable ESC system optimal performance extreme conditions
Driver performance monitoringreal time uncontrolled driving
Assess skill in real life driving situations using all control inputs
Include driver variability into driver models for computer simulation
FUTURE RESEARCH31
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THANK YOU FOR YOUR ATTENTION
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