2 research outputs found

    Terrain-Dependent Slip Risk Prediction for Planetary Exploration Rovers

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    Wheel slip prediction on rough terrain is crucial for secure, long-term operations of planetary exploration rovers. Although rough, unstructured terrain hampers mobility, prediction by modeling wheel–terrain interactions remains difficult owing to unclear terrain conditions and complexities of terramechanics models. This study proposes a vision-based approach with machine learning for predicting wheel slip risk by estimating the slope from 3D information and classifying terrain types from image information. It considers the slope estimation accuracy for risk prediction under sharp increases in wheel slip due to inclined ground. Experimental results obtained with a rover testbed on several terrain types validate this method

    ИсслСдованиС эффСктов ΠΏΡ€ΠΎΡΠΊΠ°Π»ΡŒΠ·Ρ‹Π²Π°Π½ΠΈΡ ΠΏΡ€ΠΈ Π½Π°Π²ΠΈΠ³Π°Ρ†ΠΈΠΈ мобильного Ρ€ΠΎΠ±ΠΎΡ‚Π° ΠΏΡ€ΠΈ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΠΈ ΠΏΠΎ Π½Π΅ΠΎΠ΄Π½ΠΎΡ€ΠΎΠ΄Π½Ρ‹ΠΌ повСрхностям

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    Π’ Ρ€Π°Π±ΠΎΡ‚Π΅ прСдставлСно исслСдованиС ΠΏΡ€ΠΎΡΠΊΠ°Π»ΡŒΠ·Ρ‹Π²Π°Π½ΠΈΡ колёс мобильного Ρ€ΠΎΠ±ΠΎΡ‚Π° Π² Π·Π°Π΄Π°Ρ‡Π΅ Π½Π°Π²ΠΈΠ³Π°Ρ†ΠΈΠΈ ΠΏΡ€ΠΈ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΠΈ ΠΏΠΎ Π½Π΅ΠΎΠ΄Π½ΠΎΡ€ΠΎΠ΄Π½ΠΎΠΉ повСрхности. Π‘Ρ‹Π»ΠΈ ΠΏΡ€ΠΎΠ²Π΅Π΄Π΅Π½Ρ‹ экспСримСнты ΠΏΠΎ ΠΏΠΎΠ»ΡƒΡ‡Π΅Π½ΠΈΡŽ Π΄Π°Π½Π½Ρ‹Ρ… ΠΎ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΠΈ Ρ€ΠΎΠ±ΠΎΡ‚Π° ΠΏΠΎ повСрхностям с Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹ΠΌ свойствами. На основС ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹Ρ… Π΄Π°Π½Π½Ρ‹Ρ… Π±Ρ‹Π»ΠΈ построСны ΠΌΠΎΠ΄Π΅Π»ΠΈ зависимости коэффициСнта ΠΏΡ€ΠΎΡΠΊΠ°Π»ΡŒΠ·Ρ‹Π²Π°Π½ΠΈΡ колСса ΠΎΡ‚ Ρ‚ΠΎΠΊΠ° двигатСля с ΡƒΡ‡Ρ‘Ρ‚ΠΎΠΌ Π½ΠΎΡ€ΠΌΠΈΡ€ΠΎΠ²Π°Π½Π½ΠΎΠΉ ΡƒΠ³Π»ΠΎΠ²ΠΎΠΉ скорости колёс. Для Ρ„ΠΈΠ»ΡŒΡ‚Ρ€Π°Ρ†ΠΈΠΈ ΡˆΡƒΠΌΠΎΠ² Π² измСрСниях Ρ‚ΠΎΠΊΠ° Π΄Π²ΠΈΠ³Π°Ρ‚Π΅Π»Π΅ΠΉ Π±Ρ‹Π» настроСн Ρ„ΠΈΠ»ΡŒΡ‚Ρ€ Калмана. Π’ Π·Π°ΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠΈ Π±Ρ‹Π»Π° ΠΏΡ€ΠΎΠ²Π΅Π΄Π΅Π½Π° апробация Ρ€Π°Π±ΠΎΡ‚Ρ‹ систСмы ΠΎΡ†Π΅Π½ΠΊΠΈ ΠΏΡ€ΠΎΡΠΊΠ°Π»ΡŒΠ·Ρ‹Π²Π°Π½ΠΈΡ колёс мобильного Ρ€ΠΎΠ±ΠΎΡ‚Π°.This paper presents a study of the wheel slippage of a mobile robot in a navigation problem while moving on a heterogeneous surface. Experiments were carried out to obtain data on the motion of the robot on surfaces with different properties. Models of the relationship between wheel slippage and motor current, taking into account the normalized angular velocity of the wheels, were constructed based on the experimental data. A Kalman filter was tuned to filter the noise in the motor current measurements. Finally, the wheel slippage estimation system of the mobile robot was tested
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