Commercial vehicle steering system road simulation method, test bench and system

Abstract

The invention discloses a road simulation method for a steering system of a commercial vehicle, a test bench and a system, and the method comprises the following steps: S1, simulating a target signal comprising the steering resistance of the left and right sides of a front axle of the steering system through the test bench, and obtaining a response signal of the test bench; and S2, after the simulation is finished, comparing a difference value between the response signal of the test bed and the target signal, and when the difference value is smaller than a preset difference value, judging that the road simulation requirement of the steering system is met. According to the commercial vehicle steering system road simulation method provided by the invention, the horizontal resistance of the left steering knuckle of the front axle of the steering system and the horizontal resistance of the right steering knuckle of the steering system are used as new road simulation target signals, so that simulation reproduction of road working conditions of the steering system is realized; large coupling between vertical motion simulation response signals and lateral motion simulation response signals cannot be caused, the error between the simulation signals and target signals is small, and the simulation precision of the target signals meets the requirement.

Description

technical field [0001] The invention relates to the technical field of commercial vehicle system testing, in particular to a road simulation method, a test bench and a system for a steering system of a commercial vehicle. Background technique [0002] The road simulation scheme of the existing commercial vehicle steering system follows the road simulation scheme of the passenger car steering system, and selects the angle signal of the steering wheel input 1, the acceleration signal of the left steering knuckle 7 of the front axle, and the acceleration signal of the right steering knuckle 11 of the front axle. , the strain signal of the steering straight rod 5 and the strain signal of the steering tie rod 9 are a total of 5 points as road simulation targets, such as figure 1 shown. Taking the angle of the steering wheel input end as the steering system drive signal, the vertical excitation of the road surface to the front axle is simulated by the acceleration of the left ste...

AI Technical Summary

Problems solved by technology

[0003] During the driving process of commercial vehicles, the strain signal of the steering tie rod and the stiffness of the steering tie rod are relatively large, and the strain signal generated is relatively small, resulting in a large target simulation error. However, the steering system of a commercial vehicle will change the posture of the tie rod due to vertical vibration, and at the same time, a large strain will be generated, resulting in a large coupling between the vertical motion and the lateral motion, which makes the calculation of the transfer function difficult, resulting in the simulation of the target signal. Accuracy does not meet the requirements

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