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Steering zero calibration system and method based on multi-wheel steering system

A zero-point calibration and steering system technology, which is applied to vehicle steering/bump performance, instruments, measuring devices, etc., can solve problems such as easy misoperation, hydraulic cylinder assembly error, and inconvenient operation methods, and achieve the effect of avoiding system instability

Pending Publication Date: 2022-04-15
SHAANXI HEAVY DUTY AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the assembly error of the hydraulic cylinder and the potential movement frame between the mechanical parts, there is a certain deviation between the actual median position of the hydraulic cylinder, that is, the zero position of the axle tire steering and the theoretical design median position, which directly It affects the function and control accuracy of the multi-wheel steering system. Therefore, it is necessary to correct the steering zero position of each axle tire, that is, the steering zero position calibration
[0004] However, in the existing multi-wheel steering system, the steering zero calibration system is either complex in structure and needs to be calibrated by professional equipment; or the operation method is inconvenient, and only the designer has the authority to calibrate. When the steering zero needs to be recalibrated, non-designers have no authority Calibration; there are also some methods that are easy to misuse, because the steering zero position is usually only calibrated once before the vehicle leaves the factory, and can only be calibrated by professionals after professional training; at the same time, it is considered that the steering zero position is caused by adjusting or replacing structural parts such as hydraulic cylinders. Changes that require recalibration, turning to zero calibration should not be complicated, but also need to have safety and anti-misoperation mechanisms

Method used

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  • Steering zero calibration system and method based on multi-wheel steering system

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Experimental program
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Effect test

Embodiment 1

[0030] Example 1, such as figure 1 As shown, a steering zero calibration system based on a multi-wheel steering system is provided, including a steering mode switch 1, a PLC controller 2, a displacement sensor 3 for a bridge, a displacement sensor 4 for a bridge and a displacement sensor 5 for a bridge 5, the steering The signal connection between the mode switch 1 and the PLC controller 2, when all the tires of the vehicle are back to normal and the vehicle is started, the input information of the steering mode switch 1 is collected through the PLC controller 2, if the number of times the steering mode switch 1 is toggled When N times are met, a timer is also set in the PLC controller 2, and the number of times of turning the steering mode switch 1 meets N times. When N>0, the timer is started synchronously, and the PLC controller 2 enters zero calibration when the time T is recorded. program function module and start counting;

[0031]The first bridge displacement sensor 3,...

Embodiment 2

[0035] Embodiment 2, a method of steering zero calibration system based on a multi-wheel steering system, comprising the following steps:

[0036] S1. Taking a 5-axis off-road vehicle as an example, its multi-wheel steering system is realized by electronically controlled hydraulics. Among them, the joint action of the first and second axles is controlled by the steering wheel as the dual front axles, the third axle does not participate in the steering, and the fourth and fifth axles are hydraulically controlled to follow the steering of the front axle. 1 Put it in the off state, then start the vehicle to ensure that the electrical system is normal, and then turn the steering wheel left and right several times to make the centering of the rear axle of the fourth and fifth axles controlled by the steering wheel of the front axle, and the hydraulic system is completely back to the center, and then control the steering wheel to control a Return the bridge to the center, and clear ...

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Abstract

The invention provides a steering zero calibration system based on a multi-wheel steering system, which comprises a steering mode switch, a PLC (Programmable Logic Controller), a first-axle displacement sensor, a fourth-axle displacement sensor and a fifth-axle displacement sensor, the steering mode switch is in signal connection with the PLC, and input information of the steering mode switch is acquired through the PLC; the first-bridge displacement sensor, the fourth-bridge displacement sensor and the fifth-bridge displacement sensor are also in signal connection with the PLC, and the PLC collects actual zero readings of the first-bridge displacement sensor, the fourth-bridge displacement sensor and the fifth-bridge displacement sensor and makes a difference between the collected actual zero number and the theoretically designed zero number. According to the invention, the input module is arranged on the PLC, so that the system has the advantage of repeated dynamic calibration, a program does not need to be flashed and written for many times, the system can be used at any time, and the rapidity, accuracy and convenience of steering zero calibration are improved.

Description

technical field [0001] The invention belongs to the technical field of calibration of automobile steering systems, and in particular relates to a steering zero calibration system based on a multi-wheel steering system and a method thereof. Background technique [0002] The multi-wheel steering system is used in more and more fields due to its rich steering modes, small turning radius, strong passing ability, fast response speed and high control precision. It measures the tire rotation angle of each axle through the sensors installed on each axle, and uses a certain control strategy to realize the real-time follow-up steering of the rear axle to the front axle according to the relationship between the front and rear axle rotation angles. [0003] Since the rear axle of a traditional vehicle does not need steering, its neutral position, that is, the zero position of the steering, is realized through a mechanical structure. However, for a vehicle with a multi-wheel steering sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/22G01M17/06
Inventor 陈利东聂文福高锦杜浪东殷东生
Owner SHAANXI HEAVY DUTY AUTOMOBILE