Coordinated control strategy for vehicle electro-hydraulic compound steering system

2020 ◽  
pp. 095440702094948
Author(s):  
Zhiqiang Guo ◽  
Haixiao Wu ◽  
Wanzhong Zhao ◽  
Chunyan Wang
Keyword(s):  
Energy Consumption ◽  
Control Strategy ◽  
Coordinated Control ◽  
Steering System ◽  
Compound System ◽  
Hydraulic Power ◽  
Elman Neural Network ◽  
Power Steering ◽  
Predictive Controller ◽  
Hydraulic Power Steering

In order to reduce steering energy consumption and improve steering feeling of heavy commercial vehicle, a novel electro-hydraulic compound steering system is proposed, which combines the function of electro-hydraulic power steering and electric power steering. The electro-hydraulic compound steering system dynamic model is established and the coordinated control strategy of dual actuators is proposed by analyzing the structure and dynamic characteristics of electro-hydraulic compound steering system. The genetic algorithm is used to optimize the steering assist torque distribution, and an Elman neural network predictive controller with fuzzy compensation is designed to solve the nonlinear problem of the electro-hydraulic compound system. Finally, the simulation is carried out by using Amesim/Simulink. The simulation results show that the coordinated control strategy designed in this paper enables the electro-hydraulic compound steering system significantly better than the traditional electro-hydraulic power steering system in steering feeling and energy consumption.

Electric Hydraulic Power Steering System Simulation Study

2013 ◽  
Vol 373-375 ◽  
pp. 154-157
Author(s):  
Jun Wang ◽  
Li Chao Xu
Keyword(s):  
Control Strategy ◽  
Steering System ◽  
Vehicle Speed ◽  
Motor Speed ◽  
Rotary Valve ◽  
Hydraulic Power ◽  
Power Steering System ◽  
Power Steering ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering

Properly controlling electro hydraulic power steering system can improve steering performance. The relation of motor speed, vehicle speed and steering speed is gained, according to the influence of motor speed on the steering performance. The force and angle input is set in the driver input model. Rotary valve is simulated by four orifices. The steering resistance between tire and ground is simulated by the coulomb friction on two tips of the rack. The method of double closed-loops PID is used to control the motor. The influence of the control strategy on the steering performance is realized by the simulations of three typical situation, which includes steering portability, road feel, the speed of assist force response and its stability. The results of simulation validate the availability of the control strategy, which is the basic of optimization.

Simulation on Displacement Characteristics of Variable Displacement of Double-Action Vane Pump

2010 ◽  
Vol 152-153 ◽  
pp. 1088-1091
Author(s):  
Lei Chen ◽  
Pan Zhang
Keyword(s):  
Simulation Model ◽  
High Speed ◽  
Steering System ◽  
Vane Pump ◽  
Hydraulic Power ◽  
Power Steering ◽  
Simulink Simulation ◽  
Variable Displacement ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering

On of the practical difficulties of high speed automotive hydraulic power steering is that the output exceeds the actual demands of the system, i.e., there is a substantial power loss. This paper discusses the configuration and the action principle of a new variable displacement of double-action vane pump, which consists of floating blocks. The pump belongs to an automotive hydraulic power steering system, and prosperous utilization is expected. In the meantime the mathematical and simulation model for hydraulic power steering of automobile were established and the Matlab Simulink simulation model was presented. Different parameters of pump are selected in simulating programming. The simulating results are analyzed and compared.

Design of Traditional Hydraulic Steering System with Variable Power

2014 ◽  
Vol 644-650 ◽  
pp. 755-758
Author(s):  
Jie Li ◽  
Jian Tong Song ◽  
Li Hong Wang ◽  
Jv Biao Yao
Keyword(s):  
High Speed ◽  
Steering System ◽  
Vehicle Speed ◽  
Hydraulic Power ◽  
Power Steering System ◽  
Power Characteristics ◽  
Power Steering ◽  
Hydraulic Steering ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering

Conventional hydraulic steering system has the problems of "low-speed heavy, high-speed flight" and energy-wasting when steering, the main reason is after the system is designed, the power characteristics are fixed. To solve this problem it is necessary to achieve the power characteristics of changing power steering system according to speed of vehicles, in order to offer the power that matches the speed. Using vehicle speed sensor signal to control pilot solenoid unloading valve to regulate the pressure of hydraulic system, can achieve the regulation of power characteristics, this article is based on such idea to design variable hydraulic power steering system for hydraulic power steering system of light trucks.

Discussion Structure of Variable Displacement of Double Action Vane Pump

2011 ◽  
Vol 80-81 ◽  
pp. 616-620
Author(s):  
Lei Chen ◽  
Pan Zhang ◽  
Hai Yan Wang ◽  
Ji An
Keyword(s):  
Flow Model ◽  
Steering System ◽  
Vane Pump ◽  
Hydraulic Power ◽  
Power Steering System ◽  
Power Steering ◽  
Variable Displacement ◽  
Flow Changes ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering

This paper discusses the configuration and the action principle of a new variable displacement of double-action vane pump, which consists of floating blocks. The floating blocks that may move up and down in accordance with the rotational speed of the pump. The pump belongs to an automotive hydraulic power steering system, and prosperous utilization is expected. The theoretical flow model of the new pump was established and the pump flow changes under different speed were compared.

Modeling and Simulation Based on AMESim and Simulink Electric Hydraulic Power Steering System

2013 ◽  
Vol 706-708 ◽  
pp. 1150-1153
Author(s):  
Gui Hua Fang ◽  
Wen Shuai Zheng ◽  
Li Bo Zhang
Keyword(s):  
Steering System ◽  
Hydraulic Power ◽  
Power Steering System ◽  
Vehicle Handling ◽  
Power Steering ◽  
Simulation Based ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering ◽  
The Impact ◽  
Main Factor

This article using AMESim and Simulink software co-simulation technology and appropriate software to establish the simulation model of the key components of the steering system, it is found the factor which affect vehicle handling and stability of steering system in the structure by analyzing the impact of various parameters on the car steering system. It is to verify the feasibility of the model and study how steering system of all kinds of main factor to influence the vehicle steering stability through Simulink and AMESim software co-simulation results cf vehicle steering stability GB experiments.

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