A double-closed-loop control system and method for a multi-axis electro-hydraulic steering system

Abstract

The invention provides a double-closed-loop control system and method for a multi-axis electro-hydraulic steering system, which solves the technical problem that existing multi-axis steering has defects in steering control efficiency and precision. The system includes: a steering system control unit, which is configured to process the vehicle speed and the steering angle of the active steering axle to control the steering angle of the follow-up steering axle according to the instruction configuration control strategy, and optimize the steering angle of the follow-up steering axle according to the feedback rotation condition of the follow-up steering axle; and Human-computer interaction interface, vehicle speed sensor, active steering axle angle sensor, follow-up steering axle angle sensor, follow-up steering axle electromagnetic reversing valve, follow-up steering axle proportional directional valve group, proportional directional valve state sensor. Effectively suppress wheel chattering, improve feedback control system response speed, reduce tracking error, increase steering sensitivity at low corner deviation, and effectively solve the problem of proportional valve inaction. In practical application, the steering accuracy is improved, the wear of the tire during the steering process is reduced, and the service life of the tire is increased.

Description

technical field [0001] The invention relates to the technical field of large heavy-duty vehicle control, in particular to a double-closed-loop control system and method for a multi-axis electro-hydraulic steering system. Background technique [0002] In the existing technology, the multi-axis steering technology adopted by large heavy-duty special vehicles can overcome the driving defects caused by the characteristics of large heavy-duty heavy loads, high center of mass, large number of axles, and large wheelbase, and enhance the mobility and flexibility of special vehicles (Small field turning) and handling stability, so that the vehicle has better flexibility at low speeds to ensure flexible steering in a small space at low speeds, and at the same time has better handling stability at high speeds to ensure vehicle safety. The mechanical transmission hydraulic power steering technology in the multi-axis steering technology can realize multi-axis steering, but due to the li...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the embodiments of the present invention provide a double closed-loop control system and method for a multi-axis electro-hydraulic steering system to solve the technical problem of existing multi-axis steering with defects in steering control efficiency and precision

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