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Overload identification system based on vibration state of two-axle vehicle
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on April 06, 2021 by SAE International in United States
Event: SAE WCX Digital Summit
Non-contact overload identification refers to a method that visually identifies the vibration state of the vehicle without contacting the vehicle, calculates the vehicle load combined with the vehicle dynamics model, and then judges whether the passing vehicle is overloaded. Because of convenient detection, infrastructure, low price and the characteristics of information, it has great advantages in the field of overload recognition. However, this recognition method mainly uses the single mass vibration model at present, which will have a large error due to the coupling effect of front and rear suspension. Moreover, there are requirements for obtaining the position of vehicle center of mass, which is difficult to implement in practice. In this paper, a vehicle vibration model with two modes is presented. The Sobol algorithm was used to analyze the parameter sensitivity of the model, and then the model was optimized according to the analysis results. After carsim simulation, the experiment was carried out with Yuejin Shangjun X500 as the experimental vehicle. The side-mounted camera captures the parameters of the vehicle vibration, judges which mode of vibration the vehicle belongs to, and then calculates the vehicle load by putting it into the corresponding mathematical model. The simulation and experimental results show that the maximum error of this method is within 15%, which is a great improvement compared with the single mass vibration model. This method has positive significance for popularizing the technology of visual identification of overloaded vehicles.