1. College of Precision Instrument & Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
2. Research Institute of Highway, Ministry of Transport, Beijing 100088, China
Abstract：To characterize the measurement model of dual-wheel friction testers, the dynamic calibration method based on co-excitation source was proposed. In the method, counterforce constraint based dynamic calibration device was used for data collection, then data sequences matching was done, and mapping relation between the dataset of the objective sensor and that of the reference sensor was obtained. Finally, the parameters of measurement model were confirmed by grouping regression analysis and 2D optimization. The experimental results showed that the proposed method can achieve dynamic calibration of the dual-wheel friction tester′s measurement model with good adaptation to the variation of its state of motion. The residual sum of squares of fitting with the proposed method was reduced by over 50% comparing with the globle least square method.
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2019, Vol. 40 
