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Open AccessArticle

Estimation for Runway Friction Coefficient Based on Multi-Sensor Information Fusion and Model Correlation

School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China
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Author to whom correspondence should be addressed.
Sensors 2020, 20(14), 3886; https://doi.org/10.3390/s20143886
Received: 21 May 2020 / Revised: 8 July 2020 / Accepted: 9 July 2020 / Published: 13 July 2020
Friction is a crucial factor affecting air accident occurrence on landing or taking off. Tire–runway friction directly contributes to aircraft stability on land. Therefore, an accurate friction estimation is a rising issue for all stakeholders. This paper summarizes the existing measurement methods, and a multi-sensor information fusion scheme is proposed to estimate the friction coefficient between the tire and the runway. Acoustic sensors, optical sensors, tread sensors, and other physical sensors form a sensor system that is used to measure friction-related parameters and fuse them through a neural network. So far, many attempts have been made to link the ground friction coefficient with the aircraft braking friction coefficient. The models that have been developed include the International Runway Friction Index (IRFI), Canada Runway Friction Index (CRFI), and other fitting models. Additionally, this paper attempts to correlate the output of the neural network (estimated friction coefficient) with the correlation model to predict the friction coefficient between the tire and the runway when the aircraft brakes. The sensor system proposed in this paper can be regarded as a mobile weather–runway–tire system, which can estimate the friction coefficient by integrating the runway surface conditions and the tire conditions, and fully consider their common effects. The role of the correlation model is to convert the ground friction coefficient to the grade of the aircraft braking friction coefficient and the information is finally reported to the pilots so that they can make better decisions. View Full-Text
Keywords: tire–runway friction; multi-sensor information fusion; sensor system; neural network; ground friction coefficient; aircraft braking friction coefficient; correlation model; mobile weather–runway–tire system tire–runway friction; multi-sensor information fusion; sensor system; neural network; ground friction coefficient; aircraft braking friction coefficient; correlation model; mobile weather–runway–tire system
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Niu, Y.; Zhang, S.; Tian, G.; Zhu, H.; Zhou, W. Estimation for Runway Friction Coefficient Based on Multi-Sensor Information Fusion and Model Correlation. Sensors 2020, 20, 3886.

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