DEVELOPMENT OF STABILITY INDEX FOR TRACTORS AND ITS APPLICATION IN PROTECTIVE STRUCTURE DEPLOYMENT

8/18/98


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Table of Contents

DEVELOPMENT OF STABILITY INDEX FOR TRACTORS AND ITS APPLICATION IN PROTECTIVE STRUCTURE DEPLOYMENT

INTRODUCTION

Safety Instrumentation and Devices

Purpose

Vehicle Dynamics and Stability

Definition of Moving Variables of Tractor in Three Dimensions

Typical Instability of A Tractor

Definition of Stability Index

Static Stability Index

Dynamic Stability Index

Dynamic Stability Index

Tractor Overturn and Stability Index with Time

Static Lateral Stability Index

Rotation of Tractor Around X Axis

Dynamic Lateral Stability Index

Static Longitudinal Stability Index

Rotation of Tractor Around Y Axis

Dynamic Longitudinal stability Index

Turning Stability Index

Steady-State Turning Stability Index

Dynamic Turning Stability Index

Combination of Static Stability Indexes

Combination of Stability Indexes

Combination of Dynamic Stability Indexes

Equipment and Test

Installation of MSTS

Measuring System of Tractor Stability

Ford 8N Radio-Controlled Tractor

Diagram of A Radio-Controlled Tractor

Diagram of Electrical System of Radio-Control Tractor

Mechanical Parts

Clutch and Brake

Ford 800 Steering Modification

Test Design

Lateral Stability Test

Ford 800 Ramp Tests

Longitudinal Stability Test

Turning Stability Test

Results and Discussion

Information Flowing and Synchronization

Lateral Stability Test

Lateral Stability Index

Lateral Stability Test

Lateral Stability Test

Lateral Stability Index and Tractor Position

Lateral Stability Index

Longitudinal Stability Test

Longitudinal Stability Index

Longitudinal Stability Test

Longitudinal Stability Test

Longitudinal Stability Index

Lateral Turning Stability Index

Lateral Turning Stability Test

Lateral Turning Stability Test

Lateral Turning Stability Index

Lateral Turning Stability Test

Application of Stability Index in Protective Structure Deployment

Control Algorithm and Strategy

Diagram of Deployment Indicator Control

John Deere A Tractor Equipped with Radio Control System and Pop-up Flag

Installation of Pop-up Flag

Longitudinal Stability Index and Tractor Position

Conclusion

Conclusion (cont.)

Conclusion (cont.)

Author: Juhua LIU

Email: jhliu@lamar.colostate.edu

Home Page: http://lamar.colostate.edu/~jhliu

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