Multi-objective optimization method for electric-hydraulic composite power steering system

A multi-objective optimization and steering system technology, applied in the field of multi-objective optimization of electro-hydraulic hybrid power steering system, can solve problems such as the existence of handling stability and poor steering feel

Active Publication Date: 2016-12-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a multi-objective optimization method for the electric-hydraulic hybrid power steering system, so as to solve the problems of the hydraul

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  • Multi-objective optimization method for electric-hydraulic composite power steering system
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  • Multi-objective optimization method for electric-hydraulic composite power steering system

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Embodiment Construction

[0079] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

[0080] refer to figure 1 As shown, a multi-objective optimization method for an electro-hydraulic hybrid power steering system of the present invention is applied to an electro-hydraulic hybrid power steering system, and the system includes: a mechanical steering module, an electric power assist module, a hydraulic power assist module and ECU4, corresponding sensor;

[0081] The mechanical steering module includes a steering wheel 1, a steering shaft 2, a recirculating ball steering device 8, a steering rocker arm 9, wheels 10 and a torque sensor 3 connected in sequence;

[0082] The electric booster module includes a booster motor A6 and a speed reduction mechanism 5;

[0083] The hydraul...

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Abstract

The invention discloses a novel multi-objective optimization method for an electric-hydraulic composite power steering system. A booster part of the electric-hydraulic composite power steering system consists of an electric booster steering module and a hydraulic booster module, and controlling the of the two booster modules is realized through a coupler, so that the problems that the booster characteristic adjustability of a hydraulic booster system and an electrical-controlled hydraulic booster system, which are used by a conventional large-scaled bus is poor, and when the large-scale bus travels at a middle speed or at a high speed, the steering road feel of the conventional large-scaled bus is poor are solved. Besides, through multi-objective optimizing of the electric-hydraulic composite power steering system, the steering road feel and the steering energy consumption are used as targets, the steering sensitivity is used as a constraint condition, and based on an improved multi-island genetic algorithm which is amended by simulated annealing, so that the selected parameters of the electric-hydraulic composite power steering system are optimally designed, and compared with the optimization result of the multi-island genetic algorithm, the optimized electric-hydraulic composite power steering system can obtain better global convergence, higher convergence rate, better steering road feel and better steering economy.

Description

technical field [0001] The invention relates to the technical field of automobile power steering systems, and specifically refers to a multi-objective optimization method for an electro-hydraulic compound power steering system. Background technique [0002] At present, the power steering systems commonly used in existing automobiles include: hydraulic power steering systems, electronically controlled hydraulic power steering systems and electric power steering systems. Among them, the hydraulic power steering system and the electronically controlled hydraulic power steering system can provide greater power assistance under low-speed operating conditions and reduce the burden on the driver when steering; however, the steering feel is poor under high-speed operating conditions, and there are problems with handling stability. The electric power steering system is composed of a controller, a power assist motor, a steering wheel torque sensor of a reduction mechanism, and a vehic...

Claims

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Application Information

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IPC IPC(8): B62D5/04B62D5/06G06F17/50G06N3/12
CPCB62D5/04B62D5/064G06F30/17G06F30/367G06F2111/04G06N3/126
Inventor 赵万忠栾众楷王春燕陈亮宇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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