Influence of the speed and load on the tire-pressure monitoring- system performances by frequency method

doi:10.3969/j.issn.1674-8484.2022.03.003

Abstract

Abstract:

This paper investigated the influence of vehicle speed and load changes on vibration frequency to popularize the practical application of the tire-pressure monitoring-system with a frequency method. A signal-acquisition circuit of wheel-speed sensors was designed based on the tire-pressure monitoring principle with the frequency method. The wheel-speed signal abnormal points and the gear-tooth errors were corrected. The torsional vibration frequency was calculated by the Fourier transform and by the model parameter estimation, in the speed of 40~100 km/h, under three load states including no-load (2 people in front row), half-load (4 people), and full-load (4 people plus 50 kg in trunk). The experimental tests were carried out. The statistical test results showed that the four-wheel lack of air alarm time in the free driving state was 6~8 min, and the alarm time before speed compensation was 12~15 min; there were no false alarms for different loads. The problem of too long alarm time and false alarm is solved. Therefore, this method improves the performances of tire-pressure monitoring-system.

Key words: vehicle safety, tire pressure monitoring, wheel speed signals, vibration frequency, spectrum estimation

CLC Number:

U461.91

XIA Huaicheng, HAN Xiangyang, HU Kuanda. Influence of the speed and load on the tire-pressure monitoring- system performances by frequency method[J]. Journal of Automotive Safety and Energy, 2022, 13(3): 429-437.

Figures/Tables 15

References 13

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