Electronically controlled hydraulic power steering system and multi-objective optimization method thereof

A multi-objective optimization, power-assisted steering technology, applied in power steering mechanism, steering mechanism, fluid steering mechanism, etc., can solve the problems of large steering energy consumption and great influence of driver's manipulation feeling.

Active Publication Date: 2016-10-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the existing research on the electronically controlled hydraulic power steering system, on the one hand, few people have studied the influence of the parameter setting of the mechanical and hydraulic components of the electronically controlled hydraulic power steering system on the steering feel and sensitivity of the car. , road feel, sensitivity, etc. are directly experienced by the driver, which has a great impact on the driver's control feeling; on the other hand, the existing electronically controlled hydraulic power steering system still consumes a lot of steering energy, and there is still a great potential for energy saving , and the comprehensive optimization of road sense, sensitivity, and energy consumption for the three disciplines of mechanics, hydraulics, and electricity has not yet been published.

Method used

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  • Electronically controlled hydraulic power steering system and multi-objective optimization method thereof
  • Electronically controlled hydraulic power steering system and multi-objective optimization method thereof
  • Electronically controlled hydraulic power steering system and multi-objective optimization method thereof

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Experimental program
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Effect test

Embodiment 1

[0063] Embodiment 1 Electronically controlled hydraulic power steering system

[0064] Such as figure 1 As shown, an electronically controlled hydraulic power steering system includes a steering mechanical part, a hydraulic power assist part, a signal sensor part and an electronic control unit ECU 16;

[0065] Wherein, the steering mechanical unit includes a steering wheel 1, a steering shaft 3, a rotary valve 24, a rack and pinion steering gear 4, and a steering tie rod 25 connected with wheels 5 at both ends connected in sequence, and a hydraulic cylinder 7 is also arranged on the tie rod. The hydraulic cylinder piston 8 is located in the hydraulic cylinder 7;

[0066] The hydraulic booster part includes a hydraulic oil tank 11 connected in sequence, a double-acting vane pump 12, an oil pump drive motor 13 directly connected to the double-acting vane pump, a rotary valve 24 connected to the double-acting vane pump 12 through the rotary valve oil inlet pipeline 14, and the r...

Embodiment 2

[0069] Embodiment 2 multidisciplinary collaborative optimization method

[0070] In this embodiment, the modeling software used is MATLAB-simulink, and the optimization software is isight;

[0071] In this embodiment, the system described in Embodiment 1 is used for multidisciplinary optimization calculation, figure 2 Schematic diagram of the process framework of the multidisciplinary optimization method, the specific steps are as follows:

[0072] Step 1: According to "Rotary Valve Hydraulic Power Steering System Modeling and Simulation Analysis" (Shi Peiji, Beijing Institute of Technology), "Brushless DC Motor Control System" (Xia Changliang, Science Press), "Electronic Control Hydraulic Power Steering System Design Research" (Zhang Junjun, Jiangsu University), "Electrohydraulic Power Steering System Control Strategy and Energy Consumption Analysis Method" (Su Jiankuan et al., Mechanical Design and Manufacturing) published methods to establish the electrohydraulic power st...

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PUM

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Abstract

The invention relates to an electronically controlled hydraulic power steering system and a multi-objective optimization method thereof. The electronically controlled hydraulic power steering system comprises a steering machine part, a hydraulic power steering part, a signal sensor part and an electronic control unit ECU. A driver gives a steering instruction through the steering machine part, multiple signal sensors transmit a speed signal, a steering wheel angle signal, a motor speed signal and the like to the electronic control unit ECU, the electronic control unit ECU issues an instruction to the hydraulic power steering part, to drive hydraulic oil to conduct ideal power steering; meanwhile, the electronically controlled hydraulic power steering system is subjected to multi-objective optimization, the mechanical parameters of the electronically controlled hydraulic power steering system, and the parameters of a hydraulic system part are subjected to optimization design through a collaborative optimization method by taking the steering road sense, sensitivity and energy consumption as the objectives, so that the comprehensive performances of the steering road sense, sensitivity and energy consumption of the steering system are better.

Description

technical field [0001] The invention relates to the field of automobile electronically controlled hydraulic steering systems, in particular to an electronically controlled hydraulic power steering system and a multi-objective optimization method thereof. Background technique [0002] The electronically controlled hydraulic power steering system is a new type of vehicle power that controls the rotation speed of the steering oil pump to drive the motor to pump oil to the steering system according to the steering wheel angle and vehicle speed signal when the car is turning, so that a certain pressure difference is generated on both sides of the steering hydraulic cylinder to assist the wheel steering. Steering system is widely used in automobile power steering at present. Compared with the traditional hydraulic power steering system, the electronically controlled hydraulic power steering system has the advantages of better handling feeling and dynamic response when the car is r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/06
CPCB62D5/064
Inventor 赵万忠崔滔文王春燕
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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