Mts SWIFT 20 Ultra Sensor Uživatelský manuál Strana 122
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SWIFT 20 Sensors
122
Slalom Curve Driving Example
Analyzing SWIFT Data
Slalom Curve Driving Example
Shown below is actual road data taken with the MTS SWIFT Sensor, located at
the front passenger side of a mid-size passenger vehicle. Data shown is corrected
to translate the forces and moments from the center of the transducer to the center
of the tire.
The outputs from slalom (side to side steering) curve driving can be noted in the
graph above:
Time 4 to 12 seconds shows the steering maneuvers. All other times show
straight driving on an average road surface.
Fx: The tractive force remains relatively constant since no acceleration nor
deceleration is occurring during these driving maneuvers.
Fy: The lateral force can be seen alternating from positive to negative with an
amplitude of roughly 500 lb force as the vehicle changes directions with steering
maneuvers.
Fz: The side to side weight distribution of the vehicle during these steering
maneuvers can be noted in the vertical force outputs. The stationary vertical force
of slightly over 1000 lb as noted above is seen to vary by nearly 400 lb.
Mx: The Mx output noted is corrected to give the overturning moment at the
center of the tire, primarily caused by the lateral force Fy at the rolling radius of
the tire.
My: There is little acceleration or brake torque applied during the steering
maneuvers, as noted in the My output.
Mz: The aligning moments generated from the steering maneuvers can be noted
to be in the order of 1000 in•lb for this particular test.
Slalom Curve Driving
-2000
-1500
-1000
-500
0
500
1000
1500
2000
02468101214
time in seconds
Output - Lbs
-8000
-6000
-4000
-2000
0
2000
4000
6000
8000
Output- In-Lbs
Fx (tractive force) - Lbs
Fy ( lateral force) - Lbs
Fz (normal force) - Lbs
Mx (overturning moment) - In
-
My (wheel torque) - In-Lbs
Mz (aligning torque) -In-Lbs
- SWIFT® 20 (Ultra) Sensor 1
- Product Information 1
- Publication information 2
- Contents 3
- Analyzing SWIFT Data 111 4
- Maintenance 123 5
- Troubleshooting 127 5
- Assembly Drawings 141 5
- If You Contact MTS by Phone 9
- SWIFT 20 Sensors 10
- Technical Support 10
- Before You Begin 11
- Conventions 12
- SWIFT 20 Sensors Preface 13
- Hardware Overview 15
- Construction 18
- Non-spinning 20
- Transducer Interface 21
- Additional 21
- Design Features 22
- Coordinate System 23
- Specifications 25
- Calibration 29
- Cross talk 31
- Interface 31
- Low-Profile TI Front Panel 34
- AngleFixed=0 35
- occurred on 39
- Low-Profile TI Rear Panel 41
- Induction Power Source 42
- Low-Profile TI Jumpers 43
- Interfacing with RPC 44
- Software Utilities 45
- Introduction 46
- More about TIXFER 49
- Zero Method 56
- Error Messages 57
- Shunt Error Status 58
- Select a Zero Method 60
- Calibration File Elements 61
- Upload the Calibration File 64
- Edit the Calibration File 66
- Description 68
- Download the Calibration File 70
- Installing the Transducer 73
- Ground to 83
- Data Recorder 83
- Considerations for 85
- Choosing a Zero 86
- Axes Icon 88
- Angle Zero 93
- Switch and Indicator 93
- Bridge Zero 93
- Effect of Zero 96
- Reference on SWIFT 96
- Collecting Data 98
- Road Simulator 100
- Bolt Torque Sequence 103
- For slip-ring 104
- AngleFixed 105
- Communication Configurations 106
- Cable Configurations 108
- Termination Jumper 110
- Analyzing SWIFT Data 111
- The Data 112
- Direction 113
- Fx Offset=165N 114
- Fz Data (Vertical Force) 115
- Mx Data (Overturning Moment) 116
- My Data (Brake Moment) 119
- Slalom Curve Driving Example 122
- Maintenance 123
- Transducer 124
- SWIFT 20 Sensors Maintenance 125
- Troubleshooting 127
- Signal Outputs appears to 129
- TI electronics have been 129
- value is 131
- value is set in the TI 131
- Troubleshooting Guide 133
- Assembly Drawings 141
- Cable Drawings 142
- SWIFT 20A Mechanical Parts 156
- SWIFT 20T Mechanical Parts 163
- Common Parts 170
- ISO 9001:Certified QMS 176
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