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Information Fusion of GPS, INS and Odometer Sensors for Improving Localization Accuracy of Mobile Robots in Indoor and Outdoor Applications

Published online by Cambridge University Press:  27 May 2020

Sofia Yousuf
Affiliation:
Department of Mechatronics, College of Engineering, Karachi Institute of Economics and Technology (PAF-KIET), Karachi, Pakistan. E-mail: [email protected]
Muhammad Bilal Kadri*
Affiliation:
Department of Mechatronics, College of Engineering, Karachi Institute of Economics and Technology (PAF-KIET), Karachi, Pakistan. E-mail: [email protected]
*
*Corresponding author. E-mail: [email protected]

Summary

In mobile robot localization with multiple sensors, myriad problems arise as a result of inadequacies associated with each of the individual sensors. In such cases, methodologies built upon the concept of multisensor fusion are well-known to provide optimal solutions and overcome issues such as sensor nonlinearities and uncertainties. Artificial neural networks and fuzzy logic (FL) approaches can effectively model sensors with unknown nonlinearities and uncertainties. In this article, a robust approach for localization (positioning) of a mobile robot in indoor as well as outdoor environments is proposed. The neural network is utilized as a pseudo-sensor that models the global positioning system (GPS) and is used to predict the robot’s position in case of GPS signal loss in indoor environments. The data from proprioceptive sensors such as inertial sensors and GPS are fused using the Kalman and the complementary filter-based fusion schemes in the outdoor case. To eliminate the position inaccuracies due to wheel slippage, an expert FL system (FLS) is implemented and cascaded with the sensor fusion module. The proposed technique is tested both in simulation and in real scenarios of robot movements. The simulations and results from the experimental platform validate the efficacy of the proposed algorithm.

Type
Articles
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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