A Timing Synchronization Method

Abstract

The invention discloses a timing synchronization method. The method includes the following steps that a vehicle model built in the TruckSim serves as a first model; a liquid model built in the Fluent serves as a second model; the calculation cycle of the first model serves as a dominant cycle; when timing synchronization occurs between the first model and the second model, data transferring is conducted; when timing synchronization does not occur between the first model and the second model, the second model enters a wait state until timing synchronization occurs; the second model maintains running continuously and is internally provided with a timing sequence discrimination method. The timing sequence discrimination method includes the steps that in the calculation cycle of each second model, when the deviation between the accumulated length of time of the first model and the accumulated length of time of the second model is smaller than or equal to a preset threshold, timing synchronization occurs between the first model and the second model. According to the timing synchronization method, the timing synchronization can be ensured when the two models are combined in use.

Description

technical field [0001] The invention relates to the field of vehicle dynamics simulation and control, and more specifically, the invention relates to a timing synchronization method. Background technique [0002] Road liquid tanker is an important carrier for the transportation of liquid chemical products. For tank trucks, especially tank trucks with trailers, under extreme working conditions, due to the coupling between the sloshing of the liquid inside the tank and the movement of the vehicle, it is easy to lose stability and cause folding, shimmy and rollover accidents. Due to the existence of this danger, it is difficult for researchers to study the stability of tank trucks through real vehicle tests. Therefore, it is very necessary to test the performance of tank truck dynamics and offline verification of stability control strategy. [0003] At present, there is no specific model for establishing the dynamics of the tanker. The establishment of the tanker model is mai...

AI Technical Summary

Problems solved by technology

At present, the technical solution adopted by most of the liquid tank vehicle modeling is to establish a linear equivalent model of the liquid, such as a simple pendulum model, a spring-proton model, etc., and then establish a simplified model or an accurate model of the vehicle. This technical solution is insufficient. The disadvantage is that the established dynamic model of the tank truck cannot fully consider the sloshing characteristics of the liquid

Or establish a nonlinear model of the liquid, and establish a simplified model of the vehicle, and combine the two to establish the dynamic model of the tank truck. This technical solution can fully reflect the nonlinear sloshing characteristics of the liquid, but the vehicle model is not accurate enough.

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