A Control Algorithm for Electric Power Steering of Tire Blowout Vehicle to Reduce the Impact Torque on Steering Wheel

2013 ◽  
Author(s):  
Shaosong Li ◽  
Changfu Zong ◽  
Guoying Chen ◽  
Lei He
Keyword(s):  
Electric Power ◽  
Control Algorithm ◽  
Steering Wheel ◽  
Electric Power Steering ◽  
Power Steering ◽  
The Impact

scholarly journals Torque Control of Electric Power Steering Systems Based on Improved Active Disturbance Rejection Control

2020 ◽  
Vol 2020 ◽  
pp. 1-13 ◽  
Author(s):  
Shaodan Na ◽  
Zhipeng Li ◽  
Feng Qiu ◽  
Chao Zhang
Keyword(s):  
Electric Power ◽  
Control Method ◽  
Low Frequency ◽  
Torque Control ◽  
Steering Wheel ◽  
Electric Power Steering ◽  
Power Steering ◽  
Wheel Torque ◽  
Steering Torque ◽  
The Impact

In the electric power steering (EPS) system, low-frequency disturbances such as road resistance, irregular mechanical friction, and changing motor parameters can cause steering wheel torque fluctuation and discontinuity. In order to improve the steering wheel torque smoothness, an improved torque control method of an EPS motor is proposed in the paper. A target torque algorithm is established, which is related to steering process parameters such as steering wheel angle and angular speed. Then, a target torque closed-loop control strategy based on the improved ADRC is designed to estimate and compensate the internal and external disturbance of the system, so as to reduce the impact of the disturbance on the steering torque. The simulation results show that the responsiveness and anti-interference ability of the improved ADRC is better than that of the conventional ADRC and PI. The vehicle experiment shows that the proposed control method has good motor current stability, steering torque smoothness, and flexibility when there is low-frequency disturbance.

A New Control Strategy to Reduce Steering Torque Without Perceptible Vibration for Vehicles Equipped With Electric Power Steering

2010 ◽  
Vol 132 (5) ◽  
Author(s):  
Masahiko Kurishige ◽  
Osamu Nishihara ◽  
Hiromitsu Kumamoto
Keyword(s):  
Angular Velocity ◽  
Electric Power ◽  
Control Strategy ◽  
Steering Wheel ◽  
Velocity Control ◽  
Steering Control ◽  
Electric Power Steering ◽  
Power Steering ◽  
Wide Range ◽  
Steering Torque

This paper proposes a new electric power steering control strategy, which significantly reduces the effort needed to change the steering direction of stationary vehicles. Previous attempts to reduce undesirable steering vibration have failed to reduce the steering torque because high-assist gains tend to produce oscillation or increase noise sensitivity. Herein, to eliminate this vibration, a new control strategy was developed based on pinion angular velocity control using a newly developed observer based on a simplified steering model. Tests yielded excellent estimations of the pinion angular velocity, and this made it possible to eliminate vibration at all steering wheel rotation speeds. Experiments with a test vehicle confirmed significant steering torque reduction, over a wide range of steering wheel speeds, without vibration transmission to the driver. The proposed control strategy allowed use of an assist gain more than three times higher than is conventional. Additionally, the proposed control strategy does not require supplemental sensors.

Research on Assistance Control Algorithm for Electric Power Steering System Based on Robust Control Theory

2013 ◽  
Vol 655-657 ◽  
pp. 1397-1402
Author(s):  
Chao Ying Liu ◽  
Wen Jiang Wu ◽  
Zhan Zhong Wang ◽  
Zhan Feng Gao
Keyword(s):  
Robust Control ◽  
Electric Power ◽  
Control Algorithm ◽  
Steering System ◽  
Robust Controller ◽  
Electric Power Steering ◽  
Power Steering System ◽  
The Road ◽  
Power Steering ◽  
Electric Power Steering System

Assistance control is an important control model of electric power steering system. When designing assistance control algorithm, we should not only consider the handiness and stability of steering, but also think of the assistance stability and disturbance resistance from the road surface. In order to improve the overall performance of electric power steering, robust control theory is applied to develop the assistance control algorithm. Based on the above, a robust controller was designed. The influences of the assistance torque deviation and the road surface disturbance on steering were selected as the controlled output. Then the designed controller was tested on electric power steering test bed. The test results show that the robust controller is of better assistant performance than traditional PID controller.

Modeling and Simulation of Electric Power Steering System Based on Multi-Body Dynamics

2011 ◽  
Vol 121-126 ◽  
pp. 2091-2097
Author(s):  
Jian Jun Hu ◽  
Zheng Bin He ◽  
Peng Ge ◽  
Guo Yun Li
Keyword(s):  
Electric Power ◽  
Dynamic Characteristic ◽  
Degrees Of Freedom ◽  
Steering System ◽  
Network Control ◽  
Steering Wheel ◽  
Electric Power Steering ◽  
Power Steering System ◽  
Power Steering ◽  
Electric Power Steering System

In order to analyze dynamic characteristic accurately during steering, electric power steering system is selected as research object and dynamic equation of steering system is established. Combined with eleven degrees of freedom vehicle model and tire model at combined conditions of longitudinal slip and side slip, the integral-simulation model of electric power steering system is established. The dynamic response of steering system at different steering wheel angle, control methods, front wheel steering angle and braking force is analyzed. The simulation results show that electric power steering system with neural network control has good stability, tracking performance, assist characteristic and anti-interference ability. The established model can reflect the dynamic characteristic correctly and effectively during steering.

scholarly journals Mathematical modeling of the electric power steering system of a vehicle with a worm drive

2020 ◽  
Vol 3 (59) ◽  
pp. 101-107
Author(s):  
V. Skurikhin ◽  
K. Soroka ◽  
I. Aharkov
Keyword(s):  
Electric Power ◽  
Load Capacity ◽  
Steering System ◽  
Steering Wheel ◽  
Electric Power Steering ◽  
Power Steering System ◽  
Passenger Vehicles ◽  
Power Steering ◽  
Electric Power Steering System ◽  
Worm Drive

The complexity and variety of requirements imposed on modern cars have led to a variety of designs of steering amplifiers, which are based on various physical phenomena and patterns (mechanical, pneumatic, hydraulic, electrical, etc.). Despite the difference in design and operating principles, steering amplifiers of domestic and foreign production are based on a large number of complex components and parts, which reduces their reliability. In addition, due to the constant impact of amplifiers on the controlled wheels, the driver does not feel changes in the behavior of the car on the road when disturbing influences occur, which reduces traffic safety and can lead to an accident. Therefore, increasing the sensitivity of the steering wheel to adverse factors acting on the wheels of the car while driving is one of the important tasks of improving power steering system. Introduction of electric power steering systems for cargo and passenger vehicles with a load capacity of up to 20 tons. this is a very urgent problem. In contrast to power steering system, which is still used in the control systems of high-tonnage vehicles, electric power is much simpler in design, does not require much time and costs for operation and repair. Electric power steering system with worm drive, which has a gear ratio significantly higher than those used in passenger cars, is considered. For this purpose, the formula for calculating the active moment of resistance due to the angle of transverse inclination of the pin and the corresponding system of differential equations characterizing the electric power steering system with worm drive are derived. Based on this, a functional diagram of the electric power steering control system has been developed, which is unified for worm drive steering systems and can serve as a base for modeling the steering system of cargo and passenger vehicles.

scholarly journals Active Return-to-Center Control Based on Torque and Angle Sensors for Electric Power Steering Systems

2018 ◽  
Author(s):  
Pan-Pan Du ◽  
Hao Su ◽  
Gong-You Tang
Keyword(s):  
Electric Power ◽  
Control Method ◽  
Sudden Change ◽  
Steering Wheel ◽  
Vehicle Speed ◽  
Electric Power Steering ◽  
Complete Control ◽  
Power Steering ◽  
State Switching ◽  
Active Return

This paper presents a complete control strategy of the active return-to-center (RTC) control for electric power steering (EPS) systems. We first establish the mathematical model of the EPS system and analyze the source and influence of the self-aligning torque (SAT). Second, based on the feedback signals of steering column torque and steering wheel angle, we give the trigger conditions of a state switch between the steering assist state and the RTC state. In order to avoid the sudden change of the output torque for the driving motor when the state switches frequently between the steering assist state and the RTC state, we design an undisturbed state switching logic algorithm. This state switching logic algorithm ensures that the output value of the RTC controller is set to an initial value and increases in given steps up to a maximum value after entering the RTC state, and the output value of the RTC controller will reduce in given steps down to zero when exiting the RTC state. This therefore ensures smooth switch control between the two states and improves the driver’s steering feeling. Third, we design the RTC controller, which depends upon the feedback signals of the steering wheel angle and the angular velocity. In addition, the controller increases the auxiliary control function of the RTC torque based on vehicle speed. The experimental results show that the active RTC control method does not affect the basic assist characteristics, which effectively reduces the residual angle of the steering wheel at low vehicle speed and improves the RTC performance of the vehicle.

An Experiment on Electric Power Steering (EPS) System of a CAR

2011 ◽  
Vol 110-116 ◽  
pp. 4941-4950
Author(s):  
M. Akhtaruzzaman ◽  
Norrul’ Aine Binti Mohd Razali ◽  
Mohd. Mahbubur Rashid ◽  
Amir Akramin Shafie
Keyword(s):  
Electric Power ◽  
Control Strategies ◽  
Electronic System ◽  
Steering System ◽  
Control Technique ◽  
Steering Wheel ◽  
Steering Control ◽  
Electric Power Steering ◽  
Power Steering ◽  
Steering Effort

This paper describes an experiment on Electric Power Steering (EPS) system of a car. Nowadays EPS system can be considered as a Mechatronics system that reduces the amount of steering effort by directly applying the output of an electric motor to the steering system. In this paper, the constitutions, operational mechanism and control strategies of EPS system are introduced. A potentiometer measures driver input to the steering wheel, both direction and rate of turn. This information is fed into a microcontroller that determines the desired control signals to the motor to produce the necessary torque needed to assist. Although an electro hydraulic power assisted steering system can be used to reduce the fuel consumption, but the maximum benefit can be obtained if electronic system is applied instead of the hydraulic mechanism. The paper shows that a good power steering control technique is achieved by designing a Mechatronics system. The experimental results for the designed EPS system are also analyzed in this paper.

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