A multiple sensor fusion based drift compensation algorithm for mecanum wheeled mobile robots

摘要

This paper investigates a multiple sensor fusion based drift compensation technique for a mecanum wheeledmobile robot platform. The mobile robot is equipped with high-precision encoders integrated to the wheels and fouraccelerometers placed on its chassis. The proposed algorithm combines the information from the encoders and theacceleration sensors to estimate the total drift in the acceleration dimension. The inner loop controller is designedutilizing a disturbance-observer-based acceleration control structure which is blind against the slipping motion of thewheels. The estimated drift acceleration from the sensor fusion is then mapped back to the joint space of the robot andused as additional compensation over the existing controllers. The proposed algorithm is tested on a series of experiments.The results of the experiments are also compared with those of a recent study in order to provide a benchmark evaluation.The enhanced tracking performance yielding towards smaller error magnitudes in the experiments illustrate the efficacyand success of the proposed control architecture in attenuating the positioning drift of mecanum wheeled robots.