Evaluation Method and Device for Wheelset Residual Dynamic Unbalance Based on Naive Bayes

Abstract

The present invention provides a naive Bayes-based wheel set residual dynamic unbalance evaluation method and device. The method comprises the following steps that: the routing operation data of target vehicles are acquired, the characteristic values of the routing operation data of the target vehicles are calculated, so that a training sample set is obtained; the wheel set residual dynamic unbalance of the target vehicles is obtained from the maintenance data of the target vehicles; Bayesian classifier training is performed according to a preset dynamic unbalance category set, the wheel set residual dynamic unbalance of the target vehicles and the training sample set, so that the wheel set residual dynamic unbalance evaluation model of the target vehicles is obtained; the characteristic value of the routing operation data of a vehicle to be evaluated is calculated according to the routing operation data of the vehicle to be evaluated; and a category to which the wheel set residual dynamic unbalance of the vehicle to be evaluated belongs is determined according to the characteristic value of the routing operation data of the vehicle to be evaluated and the wheel set residual dynamic unbalance evaluation model. With the method and device of the invention adopted, the state of a wheel set can be obtained under a condition that the wheel set is not disassembled.

Description

technical field [0001] The invention relates to the technical field of vehicle detection, in particular to a naive Bayesian-based method and device for evaluating the residual dynamic unbalance of a wheel set. Background technique [0002] In the machining process, due to the uneven distribution of materials, defects on the processing blank, and its own manufacturing reasons such as machining errors, assembly errors, and design errors, or factors such as impact, corrosion, and wear during use, the wheel may be damaged. Offset to the centroid. When the wheel set with offset center of mass rotates, centrifugal force must be generated under the influence of inertia, resulting in unbalanced wheel set failure. [0003] The unbalance quantity is the physical quantity that reflects the deviation of the center of mass of the wheel set. Its calculation method is the product of the unbalanced mass and the distance from the center of mass to the axis, and the unit is g m. The larger ...

AI Technical Summary

Problems solved by technology

The higher the running speed of the bus, the more severe the vibration, the distribution of wheel-rail contact points and the contact angle are constantly changing, which will lead to increased wear of the wheel rim, accelerate the peeling of the tread and the aging of other parts, increase the cost of operation and maintenance, and may cause oil in severe cases. Faults such as oil leakage from the shock absorber or broken axle box springs will deteriorate the running quality of the vehicle and bring safety hazards to the train operation

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