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Heavy vehicle electro-hydraulic servo steering system and control method capable of suppressing overshoot

A technology of steering system and electro-hydraulic servo, which is applied to vehicle components, steering mechanisms, adaptive control, etc., can solve problems such as the inability to suppress the overshoot angle of the system, affect the driving safety of the vehicle, and the dynamic instability of the whole vehicle, and achieve an improvement Operational flexibility, avoidance of throttling loss, and the effect of saving hardware cost and maintenance cost

Active Publication Date: 2022-06-24
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the response of the steering system is slow, it will not only affect the flexibility of the vehicle, but also affect the driver's judgment on the driving state and increase the driver's burden. However, the traditional steering system control method will lead to system overshoot while achieving fast response. becomes larger, the overshoot angle of the system cannot be suppressed
When the system overshoot is too large, it is easy to make the dynamic state of the whole vehicle unstable, affect the driving safety of the vehicle, and may even cause equipment damage and accidents
It can be seen that the dynamic response characteristics and overshoot characteristics of the steering system are a pair of contradictions in the system control.

Method used

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  • Heavy vehicle electro-hydraulic servo steering system and control method capable of suppressing overshoot
  • Heavy vehicle electro-hydraulic servo steering system and control method capable of suppressing overshoot
  • Heavy vehicle electro-hydraulic servo steering system and control method capable of suppressing overshoot

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Embodiment Construction

[0100] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0101] Please refer to figure 1 , The present invention provides a schematic diagram of an energy-saving heavy-duty vehicle electro-hydraulic servo steering system. As shown in the figure, the system includes a hydraulic subsystem, a mechanical subsystem, a data acquisition subsystem and a controller (19). The hydraulic subsystem includes an oil tank (1), a filter (2), a first check valve (3), a bidirectional quantitative pump (4), a first hydraulic control check valve (5), and a first relief valve ( 6), the second hydraulically controlled check valve (7), the left steering booster cylinder (9), the right steering booster cylinder (12), the electromagnetic switch valve (16), the third hydraulically controlled check valve (17), the second A relief valve (18), a fourth hydraulically controlled check valve (20), a servo driver (21), a second check valve (2...

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Abstract

The invention relates to a heavy vehicle electro-hydraulic servo steering system and a control method capable of suppressing overshoot. The heavy vehicle electro-hydraulic servo steering system comprises a hydraulic subsystem, a mechanical subsystem, a data acquisition subsystem and a controller. The data acquisition subsystem is used for acquiring the actual turning angle of a steering wheel and the pressure of each pressure sensor; the controller calculates and outputs control voltage of the servo driver according to the target rotating angle of the system, the actual rotating angle of the steering wheel and the pressure of each pressure sensor so as to control the hydraulic subsystem. According to the invention, corner closed-loop control of the system can be realized, and system overshoot can be reduced while high-dynamic tracking control of the system can be realized.

Description

technical field [0001] The invention belongs to the field of vehicle electro-hydraulic servo steering control, in particular to an electro-hydraulic servo steering system for heavy vehicles and a control method capable of suppressing overshoot. Background technique [0002] In order to meet the dynamic performance requirements of heavy-duty vehicle steering system for high steering load and high angle tracking, electro-hydraulic servo steering system is the first choice for heavy-duty vehicles because of its fast dynamic response, large output power and wide range. However, this system is usually driven by the engine to drive the quantitative pump to provide the power source, and controls the dual steering power cylinder through the servo proportional valve to drive the steering trapezoidal mechanism to achieve steering. However, the pump source pressure and flow rate of the commonly used electro-hydraulic servo steering system cannot be adjusted on demand, which leads to en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/06G05B13/04
CPCB62D5/064G05B13/042
Inventor 杜恒冯鑫育蔡梓扬张泽鑫李苏黄惠
Owner FUZHOU UNIV
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