Multi-axle vehicle experiment bench capable of realizing dynamic load simulation and working method thereof

Abstract

The invention relates to a multi-axle vehicle experiment bench capable of realizing dynamic load simulation and a working method thereof. The multi-axle vehicle experiment bench comprises a chassis, a data acquisition system, a whole vehicle controller and a dynamic load adjusting device, the chassis controls the movement state and posture change of the whole vehicle through the suspension system, the steering system, the braking system and the driving system; the dynamic load adjusting device is installed on the chassis and comprises an upper layer load adjusting mechanism and a lower layer load adjusting mechanism which drive balancing weights on the load adjusting mechanisms to move in the transverse direction and the longitudinal direction respectively. The data acquisition system comprises a wheel corner sensor, a vehicle speed sensor, a yaw velocity sensor, a whole vehicle transverse acceleration sensor and a whole vehicle longitudinal acceleration sensor; the whole vehicle controller controls the dynamic load adjusting device to work according to set simulation working conditions and collected whole vehicle dynamic parameters, and changes of dynamic loads between all axles and left and right wheels are adjusted in real time. The experiment bench can truly and reliably simulate the dynamic load, the engineering application range of the experiment bench is expanded, and the simulation range of the experiment bench to the load change of the whole vehicle is expanded.

Description

technical field [0001] The invention belongs to the technical field of multi-axle vehicle experiment devices, and in particular relates to a multi-axle vehicle experiment bench capable of realizing dynamic load simulation and a working method thereof. Background technique [0002] Heavy-duty multi-axle vehicles are widely used in many fields such as large-scale wind power equipment installation, large-scale bridge construction, heavy-duty intercontinental missile transportation, and all-terrain combat off-road. A multi-axle heavy-duty vehicle refers to a vehicle with more than two axles. It has the characteristics of multi-axle bearing and super-long frame, which can improve the load quality of the whole vehicle, reduce the load quality of a single axle, and damage the road surface. Complete transportation and installation of large equipment. However, the multi-axle heavy-duty vehicles have changing road conditions, which can easily cause vertical load changes during drivin...

AI Technical Summary

Problems solved by technology

[0005] The existing patents help to solve the load simulation problem of heavy vehicles when they are statically turning, but there are still some shortcomings and limitations, mainly as follows: (1) It is difficult for the traditional test bench to simulate the load caused by the dynamic steering of the vehicle and the acceleration and deceleration of the vehicle Transfer characteristics, insufficient reliability and realism of experimental simulations

During the dynamic steering process of a multi-axle heavy-duty vehicle, the load of the whole vehicle is transferred from the inside to the outside, resulting in inconsistent tire loads on both sides of the axle; moreover, when the multi-axle heavy-duty vehicle accelerates and decelerates, it will cause the load of the whole vehicle to change forward and backward, which in turn affects the overall load. Vehicle performance, so that the tire mechanical properties of multi-axle vehicles are quite different under light load, heavy load and super heavy load.

However, the traditional test bench is difficult to simulate the load transfer characteristics of the vehicle in the process of dynamic steering and acceleration and deceleration, which limits the scope of the experiment and lacks authenticity.

(2) The traditional test bench cannot simulate the load shaking that occurs when the vehicle is driving on a potholed road or transporting liquid goods, etc., and the engineering applicability is insufficient

When a multi-axle vehicle is running on an uneven road, there is a certain height difference between the ground contacted by each tire, which causes the load to shake

In addition, when a multi-axle vehicle transports liquid cargo, the liquid sloshing will also cause drastic changes in the vehicle load, which will affect the vehicle dynamics and ultimately affect the experimental analysis results

It is difficult for traditional test benches to effectively simulate the drastic changes in vehicle load caused by load shaking, resulting in poor experimental test results and limited test range

(3) The traditional test bench is restricted when simulating the unbalanced load of the vehicle caused by the dynamic attitude change of the vehicle

In the actual use of multi-axle vehicles, the attitude of the whole vehicle is often adjusted by controlling the active suspension, which leads to uneven load distribution of the whole vehicle, serious unbalanced loads on some wheels, and affects the tire force analysis results; at the same time, due to the long body of multi-axle vehicles, When driving on a sloped road, due to the height difference between the wheels, the vehicle body is inclined, and the vertical load of the vehicle is seriously unbalanced.

However, the vehicle attitude of the existing test bench is fixed, and it is difficult to simulate the unbalanced load phenomenon caused by the change of the vehicle attitude, resulting in single experimental test results and incomplete test results

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