scholarly journals Development of Electrohydraulic Steering Control System for Tractor Automatic Navigation

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Chengqiang Yin ◽  
Qun Sun ◽  
Jian Wu ◽  
Chengqiang Liu ◽  
Jie Gao
Keyword(s):  
Control System ◽  
Design Method ◽  
Fast Response ◽  
Steering System ◽  
Matlab Simulation ◽  
Steering Control ◽  
Automatic Navigation ◽  
Servo Controller ◽  
Improved Design ◽  
Agricultural Tractors

The most of tractors employed in agriculture are equipped with an electrohydraulic actuator to implement steering control to realize automatic navigation. Electrohydraulic steering system plays an important role in realizing accurate steering control for an automatic navigation tractor because of its complicated characteristics. The objective of this paper is to develop an electrohydraulic steering control system used for automatically guided agricultural tractors. As for the identified electrohydraulic steering system model, a modified Smith control structure was discussed. Based on the structure, an improved design method for voltage servo controller and disturbance rejection controller was proposed to enhance the performance of the steering control subsystem. The effectiveness and the superiority of the proposed method were verified by simulation under Matlab. Simulation results demonstrated the efficiency of the proposed method by showing fast response, control accuracy, and robust performance for the steering control system.

Design and Integrated Simulation of the Electro-Hydraulic Servo System Based on AMESim and Matlab

2010 ◽  
Vol 44-47 ◽  
pp. 1355-1359 ◽  
Author(s):  
Xiang Xu ◽  
Zhi Xiong Li ◽  
Hong Ling Qin
Keyword(s):  
Control System ◽  
Design Method ◽  
Design Procedure ◽  
Servo System ◽  
Hydraulic Cylinder ◽  
Fast Response ◽  
Simulation Design ◽  
Integrated Simulation ◽  
Hydraulic Servo ◽  
Hydraulic Servo System

Since electro-hydraulic servo system has fast response and highest control accuracy, it has been widely used in industrial application, including aircraft, mining, manufacturing, and agriculture, etc. With the fast development of computer science, it is feasible and available to evaluate the performance of the designed control system via virtual simulation before the practical usage of the system. In order to optimize the design procedure of the electro-hydraulic proportional controller, the co-simulation design method based on AMESim-Matlab is presented for the electro-hydraulic servo system in this paper. High accuracy of the mathematical model of electro-hydraulic servo system was full-fitted by the use of AMESim, and the advantage of high solving precision for large amount of calculation was full played using Matlab. The PID controller was employed to realize the efficient control of the motion of the hydraulic cylinder. The united simulation technique was adopted to verify the good performance of the designed control system. The simulation results suggest that the proposed method is effective for the design of electro-hydraulic servo systems and thus has application importance.

A Study on μ-Synthesis Control for Four-Wheel Steering System to Enhance Vehicle Lateral Stability

2010 ◽  
Vol 133 (1) ◽  
Author(s):  
Guo-Dong Yin ◽  
Nan Chen ◽  
Jin-Xiang Wang ◽  
Ling-Yao Wu
Keyword(s):  
Control System ◽  
Experimental Tests ◽  
Steering System ◽  
Hardware In The Loop ◽  
Steering Control ◽  
Robust Controller ◽  
Control Scheme ◽  
Parameter Variations ◽  
Good Vehicle ◽  
Selection Of

This paper presents the design of μ-synthesis control for four-wheel steering (4WS) vehicle and an experimental study using a hardware-in-the-loop (Hil) setup. First, the robust controller is designed and the selection of weighting functions is discussed in the framework of μ-synthesis control scheme, considering the varying parameters induced by running vehicle condition. Second, in order to investigate the feasibility of the four-wheel steering control system, the 4WS vehicle control system is built using dSPACE DS1005 platform. The experimental tests are performed using the Hil setup which has been constructed using the devised rear steering actuating system. The dynamics performance is evaluated by experiment using the Hil setup under the condition of parameter variations. Finally, experimental results show that the μ-synthesis controller can enhance good vehicle lateral maneuverability.

Adaptive steering controller using a Kalman estimator for wheel-type agricultural tractors

Robotica ◽  
2001 ◽  
Vol 19 (5) ◽  
pp. 527-533 ◽  
Author(s):  
D. Wu ◽  
Q. Zhang ◽  
J. F. Reid
Keyword(s):  
Effective Means ◽  
Adaptive Controller ◽  
Steering System ◽  
Pid Controllers ◽  
Test Results ◽  
Steering Control ◽  
Command Signals ◽  
Agricultural Tractors ◽  
Agricultural Tractor ◽  
Performance Obstacles

This paper presents an adaptive steering controller for achieving accurate and prompt steering control with noisy steering command signals and drifting valve characteristics on an automated agricultural tractor with an electrohydraulic steering system. It is difficult to accomplish performance objectives with conventional PID controllers because of the effects of disturbances and unknown factors. The adaptive controller, consisted of an adaptive gain tuner and an adaptive nonlinearity compensator, was to overcome these performance obstacles. Test results indicated that this controller provided an effective means for achieving satisfactory steering control for automated tractor traveling on changing and unpredictable farm field courses.

A Steering Control System to Minimize Propulsion Losses of High-Speed Containerships—Part I: System Dynamics

1982 ◽  
Vol 104 (1) ◽  
pp. 1-8 ◽  
Author(s):  
R. E. Reid ◽  
J. W. Moore
Keyword(s):  
Control System ◽  
Modeling And Simulation ◽  
Time Domain ◽  
High Speed ◽  
Steering System ◽  
Performance Criteria ◽  
Domain Modeling ◽  
Added Resistance ◽  
Steering Control ◽  
Time Domain Modeling

The problem of steering control of high-speed containerships to minimize propulsion losses is addressed. The approach involves time domain modeling and simulation. A dynamic model of a containership and steering system in a seaway is constructed. Performance criteria for added resistance associated with yawing and steering are discussed. Losses resulting from yawing of the uncontrolled ship in heavy weather are shown by simulation to be significant. The results presented form a basis for design of a controller to minimize steering related losses.

Simulation Study of Vector Control System with Speed and Flux Closed-Loop

2013 ◽  
Vol 765-767 ◽  
pp. 1787-1790
Author(s):  
Zheng Zhong Li ◽  
Guo Fang Gao ◽  
Li Xia Guo
Keyword(s):  
Control System ◽  
Vector Control ◽  
Closed Loop ◽  
Control Method ◽  
Design Method ◽  
Matlab Simulation ◽  
Rotor Flux ◽  
Control Equation ◽  
Vector Control System ◽  
Is Design

Through the rotor-flux-oriented vector control equation and the decoupling control based on vector control method, this paper studied the design method of the flux regulator in the vector control system. The vector control system is design with flux division link, and gets in an ideal performance of timing in the matlab simulation.

scholarly journals Design Method of Electric Power Steering Control System Using Scheduled H∞ Control

1999 ◽  
Vol 119 (1) ◽  
pp. 83-90 ◽  
Author(s):  
Kazuhiro Yubai ◽  
Yuji Uga ◽  
Tatsuya Suzuki ◽  
Shigeru Okuma ◽  
Toshihiko Daidou
Keyword(s):  
Control System ◽  
Electric Power ◽  
Design Method ◽  
Steering Control ◽  
Electric Power Steering ◽  
Power Steering

A Novel Fuzzy Logic PID Algorithm for Submarine Hydraulic Rudder Control

2012 ◽  
Vol 236-237 ◽  
pp. 1222-1226
Author(s):  
Rong Sun ◽  
Sheng Liu ◽  
Lan Yong Zhang
Keyword(s):  
Fuzzy Logic ◽  
Control System ◽  
Simulation Analysis ◽  
Steering System ◽  
Steering Control ◽  
Displacement Control ◽  
Parameter Uncertainties ◽  
Performance Impact ◽  
Advantages And Disadvantages ◽  
Load Disturbance

According to the composition of the submarine hydraulic rudder system, the paper analyzed the different advantages and disadvantages of the rudder type, steering agencies and the hydraulic rudder control system as well as the scope of application. System steering bodies of pump control servo, variable pump displacement control system, steering control system and rudder hydrodynamic interference model were modeled. Fuzzy logic hydraulic servo parameter adjustment method is presented, and simulation analysis of the variable pump displacement control system and steering system. As the system parameter uncertainties and load disturbance, the performance impact of parameter variation and load disturbance simulation analysis.

Analysis of Steering Control Strategy on Tractor's Hydraulic Steering By-Wire System

2014 ◽  
Vol 487 ◽  
pp. 630-634 ◽  
Author(s):  
Zhi Xiong Lu ◽  
Jiang Xue Chang ◽  
Xue Feng Bai ◽  
Yang Lu ◽  
Jun Gan Wu
Keyword(s):  
Control Algorithm ◽  
Fast Response ◽  
Steering System ◽  
Front Wheel ◽  
Bench Test ◽  
Steering Control ◽  
Loop Control ◽  
Response Characteristics ◽  
Hydraulic Steering ◽  
Wire System

The structure and working principle of the hydraulic steering by-wire system were described, and the optimal control algorithm of the system was obtained by the comparative analysis. Fuzzy control was chosen as the steering systems control algorithm, and it can realize closed-loop control of the front wheel corner. Matlab/Simulink was used for the simulation of the entire system. The simulation got the fuel tank displacements response curve, and verified the accuracy of the system design, which can provide a reference to the design of tractors steering system. Bench test was proposed to verify the accuracy of the system. The bench test results showed that the hydraulic steering by-wire controller can realize systems steering function well, and the system improved the control accuracy and fast response characteristics.

A Coordinative Steering Control Method Based on PID Compensation for an Electric Vehicle

2014 ◽  
Vol 644-650 ◽  
pp. 475-484
Author(s):  
Hao Qiu ◽  
Song Feng Liang
Keyword(s):  
Electric Vehicle ◽  
Control Method ◽  
Mathematic Model ◽  
Steering System ◽  
Control Parameters ◽  
Matlab Simulation ◽  
Steering Control ◽  
Control Effect ◽  
Excellent Control ◽  
And Control

This paper presents a coordinating steering control method in an Electric Vehicle with Four-in-Wheel-Motors Drive and Four-Wheel Independent Steering. This control method applied a PID compensation to solve the absonant steering problem. This research builds a mathematic model for the control system and uses the Matlab simulation to verify the feasibility and control effect. Then it is applied in a real car environment for further experiment in which the paper studies the control effect with varied control parameters. According to the analysis of the experiment, a practical solution for steering System is proposed with excellent control effect.

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