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Open AccessArticle

Pedestrian Navigation Method Based on Machine Learning and Gait Feature Assistance

1
School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, China
2
College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(5), 1530; https://doi.org/10.3390/s20051530
Received: 15 January 2020 / Revised: 21 February 2020 / Accepted: 5 March 2020 / Published: 10 March 2020
(This article belongs to the Special Issue Wearable Electronic Sensors)
In recent years, as the mechanical structure of humanoid robots increasingly resembles the human form, research on pedestrian navigation technology has become of great significance for the development of humanoid robot navigation systems. To solve the problem that the wearable inertial navigation system based on micro-inertial measurement units (MIMUs) installed on feet cannot effectively realize its positioning function when the body movement is too drastic to be measured correctly by commercial grade inertial sensors, a pedestrian navigation method based on construction of a virtual inertial measurement unit (VIMU) and gait feature assistance is proposed. The inertial data from different positions of pedestrians’ lower limbs are collected synchronously via actual IMUs as training samples. The nonlinear mapping relationship between inertial information from the human foot and leg is established by a visual geometry group-long short term memory (VGG-LSTM) neural network model, based on which the foot VIMU and virtual inertial navigation system (VINS) are constructed. The VINS experimental results show that, combined with zero-velocity update (ZUPT), the integrated method of error modification proposed in this paper can effectively reduce the accumulation of positioning errors in situations where the gait type exceeds the measurement range of the inertial sensors. The positioning performance of the proposed method is more accurate and stable in complex gait types than that merely using ZUPT. View Full-Text
Keywords: pedestrian navigation; virtual inertial navigation system; machine learning; gait phase recognition; gait feature assistance pedestrian navigation; virtual inertial navigation system; machine learning; gait phase recognition; gait feature assistance
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MDPI and ACS Style

Zhou, Z.; Yang, S.; Ni, Z.; Qian, W.; Gu, C.; Cao, Z. Pedestrian Navigation Method Based on Machine Learning and Gait Feature Assistance. Sensors 2020, 20, 1530.

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