Traction Control
Nick CarterBrian McConnel
Kellee Korpi
Introduction
¢ System for FSAE Competition¢ Lab Tested and approved¢ No Final Testing ¢ Final Design
Objectives
¢ Slippage Detection & Traction Controll User ControlledlMeasure Wheel Velocitiesl Programmable Control Algorithml Control Vehicle Speed
Procedure
¢ Select allowable slip percent¢ Measure wheel velocities¢ Compare velocities to analyze slip¢ Determine if action is required¢ Cut spark if appropriate
System Overview
Power Supply
User Control
User Control
¢ System Override (On/Off)l 2 Position Toggle Switch
¢ Adjustable Slip Percentagel 6 Position Rotary Switch
User Control
User Control
PIN Code7 116 105 014 00
User Control
Inductive Sensors
Inductive Sensors
¢ +5 V Voltage Signall Pepperl-Fuchs Proximity Sensor
NBB8-18GM30-E2-V1l n-Channel MOSFET
BS170P
Inductive Sensors
¢ Targets (Vehicle Bolts)lWidth: 18 mml Spacing: >36 mm l Sensing Range: 8 mm
Inductive Sensors
Inductive Sensors
Inductive Sensors
Microcontroller
Microcontroller
¢ Input 6 Voltage Signal¢ Compare & Evaluate Information
¢ Output 1 Voltage Signal
l Rabbit RCM3110
Microcontroller
Microcontroller
Microcontroller
Test Data
5% 10% 15% 20%Left Side (Hz) 60 60 60 60Right Side (Hz) 73 73 73 73
Output No Slip No Slip No Slip No Slip
5% 10% 15% 20%Front (mHz) < 100 < 100 < 100 < 100Rear (Hz) > 3 > 3 > 3 > 3
Output Slip Slip Slip Slip
Test #2: Start-Up
Test #1: Cornering
Test Data
0%< > < > < > < >
Left Front (Hz) 60 57.2 63.1 54.1 66.3 51 70.3 48.1 74.8Right Front (Hz) 60 60 60 60 60 60 60 60 60Left Rear (Hz) 60 60 60 60 60 60 60 60 60Right Rear (Hz) 60 60 60 60 60 60 60 60 60
Output No Slip Slip Slip Slip Slip Slip Slip Slip Slip
Percent Error 0.00% 0.35% 0.16% 0.19% 0.45% 0.00% 1.88% 0.21% 3.89%
Left Front (Hz) 16 15.2 16.9 14.4 17.8 13.6 18.9 12.8 20Right Front (Hz) 16 16 16 16 16 16 16 16 16Left Rear (Hz) 16 16 16 16 16 16 16 16 16Right Rear (Hz) 16 16 16 16 16 16 16 16 16
Output No Slip Slip Slip Slip Slip Slip Slip Slip Slip
Percent Error 0.00% 0.00% 0.60% 0.00% 1.14% 0.00% 2.72% 0.00% 4.17%
Test #3: Single Wheel
5% 10% 15% 20%
Engine Control Unit
Engine Control Unit
¢ Cut Spark when Promptedl Performance Electronics, Ltd.
PE-ECU-1
Budget
Part Qty Budget Cost Actual Cost
Sensors 4 $264.00 $350.00Microcontroller 1 $210.00 $203.00
Packaging NA $30.00 $80.56Miscellaneous NA $135.00 $200.00
$639.00 $833.56Total
Schedule
Tasks & Milestones DateFound out there will be no race for 2005 10/5/2004Tested Digital Input on ECU 10/23/2004Received Sensors 10/26/2004Received Printed Circuit Board 11/18/2004Wired Vehicle Components 11/19/2004Found out the Engine blew up 12/1/2004Perfected Code 12/2/2004Code Accepted Actual Sensor Signal 12/2/2004Final Laboratory Testing 12/2/2004Project Demonstration 12/3/2004Project Completion 12/9/2004Project Presentation 12/10/2004
Specifications
Voltage 10 to 15 VDCSize (Containment) 7 x 5 x 3 in.
Size (User Control Box) 3.5 x 2 x 1.5 in.Current 50 mA
Sensors 4 ea.Sensor Range 8 mm
Operating Temperature -14 to 158 oFOperating Frequency <300 Hz
Engine Control Unit 1 Digital Input
Targetwidth 18 mm
spacing >36 mm
For Use With
The End