| NEURO-FUZZY MODELLING AND STABLE PD CONTROLLER FOR
ANGULAR POSITION IN STEERING SYSTEMS |
Julio C. Ramos-Fernández1, Virgilio López-Morales2
, Marco A. Márquez-Ver1, Juan Manual Xicotencatl Pérez1, Joel Suarez-Cansino2 |
1Polytechnic University of Pachuca
2Autonomous University of Hidalgo State |
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| ABSTRACT |
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The precision agriculture and soil tillage are tasks which can be achieved by Automated Tractors (AT) through
the integration of several servomechanisms. In order to reach a high autonomy under various work conditions of the AT,
control laws’ design and tuning are paramount. The aim of this work is to develop an angle position controller for steering
systems applied to an AT. We introduce an automatic electronic steering system by using a fuzzy model, obtained through an
Adaptive Neuro-Fuzzy Inference System (ANFIS) algorithm training. A proportional derivative (PD) controller is also tuned
through a Takagi-Sugeno fuzzy model (T-S). Furthermore, several closed-loop stability tests were carried out, in numerical
simulation and real-time implementation. The feasibility of our methodology is illustrated through the tracking of several
angles’ profiles in a real test scenario. For the tracking of a trajectory or several set-points, we have obtained mean errors
about 0.6545 and 0.8651 degrees, respectively. Some mechatronic integrations to convert a conventional tractor into a basic
Autonomous Agriculture Off-road Tractor (AAOT) are also shown. |
| Key Words:
Fuzzy model, ANFIS modelling, Fuzzy system stabilization, Steering system control |
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Corresponding Author.
Virgilio López-Morales , Email. 
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