Electro-hydraulic hybrid power steering system control device and control method thereof
A technology of steering system and compound power, applied in the direction of electric steering mechanism, power steering mechanism, steering mechanism, etc., can solve the problems of small maximum assist torque, poor steering road feel, poor handling stability, etc., to eliminate tracking error and improve control Accuracy and the effect of improving steering stability
Active Publication Date: 2018-06-26
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 an electric-hydraulic hybrid power steering system control device and its control method to solve the problems of the hydraulic power steering system and the electronically controlled hydraulic power steering system in the prior art. Under working conditions, the steering feel is poor, the handling stability is poor, and the maximum assist torque output by the electric power steering system is small
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[0030] 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.
[0031] refer to figure 1 As shown, an electro-hydraulic hybrid power steering system control device of the present invention is applied to the electro-hydraulic hybrid steering system, and the system includes: a driver model 1, a steering wheel model 2, a torque sensor 3, and a steering gear 4 , wheel 5;
[0032] The driver model 1 inputs the steering torque through the steering wheel model 2, transmits the torque to the wheels 5 through the steering column and the steering gear 4, drives the wheels 5 to rotate, and realizes system steering.
[0033] The above-mentioned control device includes: a mechanical torque control module 6, a Hinf control module 8, an electric power assist actuator ...
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The invention discloses a control device for an electric-hydraulic composite power steering system and a control method of the control device. An assisting force part of the electric-hydraulic composite power steering system is composed of an electric assisting force executing mechanism and a hydraulic assisting force executing mechanism. An assisting force coupling module achieves coupling of assisting force of the two modules. By the adoption of the control method, different steering modes are selected according to angle signals of a steering wheel, vehicle speed signals, yaw velocity signals and the like, different assisting force module working modes are selected when a vehicle is in different states, and the problems that a hydraulic assisting force system and an electric control hydraulic assisting force system which are adopted by a traditional passenger vehicle are relatively poor in assisting force characteristic adjustability, and the steering road sense of the passenger vehicle at the medium and high speed is relatively low are solved.
Description
technical field [0001] The invention relates to the technical field of automobile power steering system control, and specifically refers to an electric-hydraulic compound power steering system control device and a control method based on the 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 ...
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IPC IPC(8): B62D5/065B62D5/04
CPCB62D5/0463B62D5/065
Inventor 赵万忠栾众楷王春燕陈亮宇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS