traction control - uidaho.edu · lpepperl-fuchs proximity sensor nbb8-18gm30-e2-v1 ln-channel...

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