Objectification of the feedback behavior of the suspension and steering system

As the four-wheel steering (4WS) system has great potentials, many researchers' attention was attracted to this technique and active research was made. As a result, passenger cars equipped with 4WS systems were put on the market a few years ago. This report tries to identify the essential elements of the 4WS technology in terms of vehicle dynamics and control techniques. Based on the findings of this investigation, the report gives a mechanism of electronically controlling the steering system depending on the variable pressure applied on it. This enhances the controlling and smoothens the operation of steering mechanism.

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Performance testing for an active/passive vibration isolation and steering system

10.2514/6.1996-1210 ◽

1996 ◽

Cited By ~ 1

Author(s):

Jeanne Sullivan ◽

James Gooding ◽

Michelle Idle ◽

Alok Das ◽

Terance Hoffman ◽

...

Keyword(s):

Vibration Isolation ◽

Performance Testing ◽

Steering System ◽

Passive Vibration Isolation

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Adaptive Control of Vehicle Yaw Rate with Active Steering System and Extreme Learning Machine - A Pilot Study

Proceedings in Adaptation, Learning and Optimization - Proceedings of ELM-2017 ◽

10.1007/978-3-030-01520-6_1 ◽

2018 ◽

pp. 1-11

Author(s):

Pak Kin Wong ◽

Wei Huang ◽

Ka In Wong ◽

Chi Man Vong

Keyword(s):

Adaptive Control ◽

Pilot Study ◽

Extreme Learning Machine ◽

Steering System ◽

Yaw Rate ◽

Active Steering ◽

Learning Machine ◽

Active Steering System

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Design and experiment of multi-mode steering system of agricultural machinery for hilly and mountainous area

Advances in Mechanical Engineering ◽

10.1177/16878140211034827 ◽

2021 ◽

Vol 13 (7) ◽

pp. 168781402110348

Author(s):

Kai Hu ◽

Wenyi Zhang

Keyword(s):

Negative Impact ◽

System Development ◽

Coupling Model ◽

Maximum Error ◽

Rear Wheel ◽

Steering System ◽

Mountainous Area ◽

Agricultural Machinery ◽

Hydraulic Cylinders ◽

Multi Mode

In order to improve the steering flexibility of agricultural machinery in hilly and mountainous areas, a multi-mode steering system with front wheel steering, rear wheel steering, and four-wheel steering has been developed. The hydraulic steering system based on load sensitivity principle and proportion-integration-differentiation (PID) controlling algorithm was designed, which overcomes the negative impact of external load changes on flow control accuracy. The mechanical-hydraulic-controlling coupling model established in the AMESim and the sequential quadratic combinatorial optimization algorithm (SQCOA) was adopted to obtain the optimal combination of PID parameters. The simulation results demonstrate that the parameters such as pressure, speed, displacement of hydraulic cylinders, etc. in different steering modes meet the design requirements. To examine and verify the system performance, the test platform was researched and developed for conducting steering radius and displacement measurement. The experimental data illustrated that the front and rear hydraulic cylinders have good synchronization accuracy in four-wheel steering mode, and the fast switch of steering mode can be realized. The maximum error rate of is steering radius 4.21% and 3.77%, respectively, in two-wheel steering and four-wheel steering modes. The research methods and conclusions can provide a theoretical basis and reference for the other steering system development.

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Establishment and comparison of a spatial dynamics model for virtual track train with different steering modes

Proceedings of the Institution of Mechanical Engineers Part K Journal of Multi-body Dynamics ◽

10.1177/14644193211024031 ◽

2021 ◽

pp. 146441932110240

Author(s):

Zhonghui Yin ◽

Jiye Zhang ◽

Haiying Lu

Keyword(s):

Pid Controller ◽

Dynamic Performance ◽

Spatial Dynamics ◽

Steering System ◽

Front Wheel ◽

Proportional Integral Derivative ◽

Dynamics Model ◽

Proposed Model ◽

Suspension Control ◽

Curved Section

To solve the urbanization and the economic challenges, a virtual track train (VTT) transportation system has been proposed in China. To evaluate the dynamic behavior of the VTT, a spatial dynamics model has been developed that considers the suspension system and the steering system. Additionally, the model takes into account road irregularity to make simulations more realistic. Based on the newly proposed dynamic model and a designed proportional–integral–derivative (PID) controller, simulation frames of the vehicle and of the VTT are established with the path-tracking performance. The results show that the vehicle and the VTT can run along a desired lane with allowable errors, verifying the proposed model. The vehicle and VTT with the four-wheel steering system show a better dynamic performance than the models with the front-wheel steering system in the curved section. Moreover, the simulation frame can be further applied to dynamics-related assessments, parameter optimization and active suspension control strategy.

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Modelling and Stability Analysis of Articulated Vehicles

Applied Sciences ◽

10.3390/app11083663 ◽

2021 ◽

Vol 11 (8) ◽

pp. 3663

Author(s):

Tianlong Lei ◽

Jixin Wang ◽

Zongwei Yao

Keyword(s):

Stability Analysis ◽

Critical Velocity ◽

Equations Of State ◽

Steering System ◽

Analysis Model ◽

Nonlinear Dynamic Model ◽

Equilibrium Equations ◽

Eigenvalue Method ◽

Articulated Vehicles ◽

The Stability

This study constructs a nonlinear dynamic model of articulated vehicles and a model of hydraulic steering system. The equations of state required for nonlinear vehicle dynamics models, stability analysis models, and corresponding eigenvalue analysis are obtained by constructing Newtonian mechanical equilibrium equations. The objective and subjective causes of the snake oscillation and relevant indicators for evaluating snake instability are analysed using several vehicle state parameters. The influencing factors of vehicle stability and specific action mechanism of the corresponding factors are analysed by combining the eigenvalue method with multiple vehicle state parameters. The centre of mass position and hydraulic system have a more substantial influence on the stability of vehicles than the other parameters. Vehicles can be in a complex state of snaking and deviating. Different eigenvalues have varying effects on different forms of instability. The critical velocity of the linear stability analysis model obtained through the eigenvalue method is relatively lower than the critical velocity of the nonlinear model.

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