scholarly journals Optimal Design of the Six-Wheel Steering System with Multiple Steering Modes

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Haixiang Bu ◽  
Aijuan Li ◽  
Xin Huang ◽  
Wei Li ◽  
Jian Wang
Keyword(s):  
Working Conditions ◽  
Small Volume ◽  
Steering System ◽  
System Structure ◽  
Cad Model ◽  
Electronic Control ◽  
Road Vehicles ◽  
Wheeled Vehicle ◽  
Calculation Results ◽  
Passing Ability

Vehicles will face different working conditions during the use, and different working conditions have different requirements for vehicle functions, which results in many subdivided models. An off-road vehicle is a subdivision model produced to adapt to complex road conditions. In order to adapt to complex road conditions, vehicles should have a good passing ability, small size, and good flexibility. The six-wheeled vehicle has both good passing ability and small volume, which is the best choice for off-road vehicles. The design of the steering system becomes the key step to improve the flexibility of the six-wheeled vehicle. This paper mainly designs an independent steering system for a six-wheel electric vehicle with higher flexibility. The system is designed for six-wheel electric vehicles driven by six in-wheel motors. It mainly includes mechanical steering system and electronic control steering system. Both mechanical steering systems and electronic control steering system have multiple steering modes. Firstly, this paper introduces the various steering modes of the mechanical steering system and the electronic control steering system. Secondly, a CAD model is established by using the software Solidworks, and the system structure is introduced in detail combined with the CAD model. Finally, a kinematics model is established and calculated. The calculation results showed that the steering system can significantly improve the flexibility of the vehicle, so that the vehicle can complete the steering stably and quickly on complex road sections.

Advanced Automatic Steering Systems for Multiple Articulated Road Vehicles

2013 ◽  
Author(s):  
Sebastian Wagner ◽  
Gunter Nitzsche ◽  
Robert Huber
Keyword(s):  
Mechanical Stress ◽  
Kinematic Model ◽  
Steering System ◽  
Guidance System ◽  
Electronic Control ◽  
Road Vehicles ◽  
Control Units ◽  
Steer By Wire ◽  
Automatic Steering ◽  
Multi Body

This article describes a novel automatic steering system for a 30.73m long double articulated bus equipped with three independent steer-by-wire axles. Two model-based control design approaches are proposed. The first approach uses a kinetic vehicle model to design a train-like guidance system and a force-canceling that avoids excessive mechanical stress in the joints and the chassis. While the first approach requires high computational efforts, the second approach utilizes a kinematic model to design an extended Ackermann-steering system that performs well on available electronic control units (ECU). Multi-body-system (MBS) simulations show that both approaches offer high tracking performance and low mechanical stress in the chassis of the vehicle. Furthermore, road tests with the prototype AutoTram® Extra Grand confirm the simulation results.

The Stability Analysis of Slope of Shegang Protecting Dyke

2011 ◽  
Vol 261-263 ◽  
pp. 1841-1845
Author(s):  
Hui Qin Yao
Keyword(s):  
Stability Analysis ◽  
Working Conditions ◽  
Saturation Line ◽  
Dam Safety ◽  
Design Code ◽  
Embankment Dam ◽  
Safe Operation ◽  
Calculation Results ◽  
The Stability ◽  
Reinforcement Design

Appraisal of dam slope safety is essential for security and stability of the dyke that has been constructed for many years. According to the requirements of the appraisal of dam safety, the stability analysis of slope of Shegang dyke has been carried out by using Sweden circular-arc method, Bishop method, Engineer Corps method and Lowe method four methods under many kinds of working conditions and some conditions when the saturation line raising. Combined with the design code form embankment dam, the calculation results can be analyzed. The analysis can show that the security indexes of anti-slide under four kinds of working conditions and some conditions when the saturation line raising meet the requirements of the design code. This can provide basis for the reinforcement design of the dam, which also has a certain directive significance for the safe operation and observation of the dam in the future.

scholarly journals Analytic Solution for Double Optical Metasurface Beam Scanners

2021 ◽  
Author(s):  
Jingru Wang ◽  
Yuehe Ge ◽  
Zhizhang (David) Chen ◽  
Zhimeng Xu ◽  
Hai Zhang
Keyword(s):  
Small Volume ◽  
Analytic Solution ◽  
Low Cost ◽  
Beam Steering ◽  
Steering System ◽  
New Approach ◽  
Blind Zone ◽  
Inverse Solutions ◽  
Control Light ◽  
Light Beams

Abstract Optical metasurfaces are researched more and more intensively for the possible realization of lightweight and compact optical devices with novel functionalities. In this paper, a new beam-steering system based on double metasurface lenses (metalenses) is proposed and developed. The proposed system is lightweight, small volume, low cost, and easy to integrate. The exact forward and inverse solutions are derived respectively using the generalized Snell’s law of refraction. Given the orientations of the double metalenses, the pointing position can be accurately determined. If the desired pointing position is given, the required metalenses’ orientations can be obtained by applied global optimization algorithms to solve nonlinear equations related to the inverse problem. The relationships of the scan region and blind zone with the system parameters are derived. The method to eliminate the blind zone is given. Comparison with double Risley-prism systems is also conducted. This work provides a new approach to control light beams.

scholarly journals Analysis of driving properties of a three-wheeled vehicle with a newly designed steering system

2019 ◽  
Vol 254 ◽  
pp. 03008
Author(s):  
Ján Dižo ◽  
Miroslav Blatnický ◽  
Pavol Kurčík
Keyword(s):  
Rear Axle ◽  
Steering System ◽  
Point Of View ◽  
Wheeled Vehicle

This paper presents results of analyses of a three-wheeled vehicle with the newly designed steering system. Our design of steering system is intended to be mounted on a tricycle with the electric drivetrain. The standard steering system of a three-wheeled vehicle has disadvantage, that such a vehicle is unstable, when it is curving a curve mainly at higher speeds. It results to a breach of stability form the overturning point of view. The newly designed steering system of a three-wheeled vehicle contributes to increasing its stability. It means that a three-wheeled vehicle with the newly designed steering system is able to pass a curve with a smaller radius at higher speed. The main objectives of analyses presented in this paper is comparison of driving properties of a three-wheeled vehicle with two wheels on a rear axle with the standard steering system and with the newly designed steering system by means of simulation computations, which were carried out in Simpack package.

Automated Mechanical Transmission Technology and Development Trend

2014 ◽  
Vol 697 ◽  
pp. 280-284 ◽  
Author(s):  
Qi Chen ◽  
Yu Cai Zhao ◽  
Jian Bo Yin ◽  
Yun Bo Ma
Keyword(s):  
Technology Development ◽  
Automatic Transmission ◽  
Development Trend ◽  
Manual Transmission ◽  
System Structure ◽  
Mechanical Transmission ◽  
Electronic Control ◽  
Key Technology ◽  
Design And Optimization ◽  
And Performance

Automated Mechanical Transmission achieves automatic shifting by applying electronic control technology in traditional dry clutch and Manual Transmission,not only having the advantages of automatic transmission, but also keeping the performance of the original manual transmission. This paper generally introduces the function and performance characteristics of Automated Mechanical Transmission, and elaborates its system structure, working principle and key technology. The key technology is divided into 4 parts, including Electronic Control System, Clutch Control, Shift Strategy and Design and Optimization of the Actuator. Combining with the related companies' research and development products, the performance of the Automated Mechanical Transmission is further analyzed. At the same time, according to the current research status in the world, putting forward the following research focus and development trend of Automated Mechanical Transmission.Keywords: Automated Mechanical Transmission; Key Technology; Development Trend

Research and Realization of Simulation for Automobile Steering Resisting Torque

2015 ◽  
Vol 733 ◽  
pp. 745-748 ◽  
Author(s):  
Li Ying Wu ◽  
Tong Qiang Xu ◽  
Tian Luo
Keyword(s):  
Control System ◽  
Simulation Model ◽  
Working Conditions ◽  
Model Simulation ◽  
Steering System ◽  
System Control ◽  
Experiment Platform ◽  
Test Platform ◽  
Loading Device ◽  
Set Up

In this paper, through analyzing the generating mechanism of automobile steering resisting torque, we build MATLAB/SIMULINK torque simulation model and get the steering resisting torque under different working conditions. And the results show that the model has a higher accuracy through comparing it with actual measured steering resisting torque. Design and set up the experiment platform composed of three parts including steering system, control system and torque loading device. Based on the data of steering resisting torque obtained from the model simulation, we manipulate torque loading device to input a certain of resistance for steering system ,thus to realize accurate simulation of various steering condition on test platform ,which has paved the way for the development and debugging of EPS controller.

Modeling and Kinematics Simulation Analyze of Conventional Suspension with Double Trailing Arms for Light Off-Road Vehicles

2013 ◽  
Vol 312 ◽  
pp. 673-678 ◽  
Author(s):  
Rui Ling Wang ◽  
Jian Zhu Zhao ◽  
Guo Ye Wang ◽  
Xiao Kai Chen ◽  
Liang Li
Keyword(s):  
Working Conditions ◽  
Vertical Plane ◽  
Front Wheel ◽  
Road Vehicles ◽  
Steering Angle ◽  
Helical Springs ◽  
Kinematics Simulation ◽  
Body Dynamics ◽  
Suspension Model ◽  
Multi Body

To study the kinematics characteristics of conventional suspension with double trailing arms for light off-road vehicles, suspension model of a light off-road vehicle was established on multi-body dynamics software ADAMS/View, which has double trailing arms and helical springs, and make the suspension kinematics simulation for getting the caster angle and front-wheel steering angle curves on different working conditions. The results show that the double trailing arm lengths, the angles between double trailing arms and horizontal plane/vertical plane, bushing stiffness of the double trailing arms linking with frame are main parameters that affect the caster angle and front-wheel steering angle. The suspension model is rational.

In-the-Loop Simulation Based on the Test Bed of Automotive Steer-by-Wire System

2014 ◽  
Vol 705 ◽  
pp. 142-145
Author(s):  
Wen Ming Yu
Keyword(s):  
Steering System ◽  
System Structure ◽  
Test Bed ◽  
Qualitative Simulation ◽  
Simulation Based ◽  
Steer By Wire ◽  
Working Principle ◽  
Simulation Results ◽  
Wire System

Automotive steer-by-wire system uses electronic signaling to transfer the command and causes the motor-driven steering. It can improve the maneuverability and stability of the driver steering. This article first discussed the car-by-wire steering system structure and working principle. Then, it builds the in-the-loop simulation based on the test bed of automotive steer-by-wire system. Moreover, this paper researches the test bad design of the automotive steer-by-wire system. The operation module controller is designed based on the of the automotive steer-by-wire system. At last, we can find out the qualitative simulation results.

Investigation of a Double-Arched Bridges Mechanical Behavior by the Static Load Test

2014 ◽  
Vol 501-504 ◽  
pp. 1297-1300
Author(s):  
Hai Yun Huang ◽  
Jun Ping Zhang
Keyword(s):  
Finite Element ◽  
Comparative Analysis ◽  
Working Conditions ◽  
Static Load ◽  
Element Model ◽  
Load Test ◽  
Structural Deformation ◽  
Static Load Test ◽  
Load Bearing Capacity ◽  
Calculation Results

An on-site static load test of a reinforced concrete double-arch bridge with fracture is carried out, and a comparative analysis of the measured experimental results of the bridge working conditions and the calculation results of Midas/civil Finite Element Model is performed. The results show that the performance and structural deformation recoverability of the bridge is weak. The bridges overall load-bearing capacity does not satisfy its designed requirements.

The Pure Electric Vehicle Dynamic Performance Simulation

2012 ◽  
Vol 260-261 ◽  
pp. 353-356 ◽  
Author(s):  
Zhi Zhang ◽  
Min Rui Guo ◽  
Pei Zhang
Keyword(s):  
Electric Vehicle ◽  
Working Conditions ◽  
Dynamic Performance ◽  
Simulation Software ◽  
System Structure ◽  
Vehicle Dynamic ◽  
Performance Simulation ◽  
Electric Car ◽  
Vehicle Simulator ◽  
Simulation Results

Modeling and simulation technology is the key technical one of researching and developing pure electric car. Firstly analyzes system structure of the simulation software ADVISOR (Advanced Vehicle Simulator), use ADVISOR to model and simulate the dynamic performance of the pure electric vehicle. And then take a pure electric vehicle for example, mainly simulate the dynamic performance in the way of the typical working conditions CYC_UDDS, and compare dynamic performance simulation results under two different transmission, optimalize dynamic performance of pure electric vehicle.

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