Reliable Subjective Assessment of Vehicle Handling by Drivers: Is it an Elusive Goal?

2001 ◽  
Author(s):  
D. A. Crolla ◽  
J. P. Whitehead
Keyword(s):  
Subjective Assessment ◽  
Whole Body ◽  
Steering Wheel ◽  
Vehicle Handling ◽  
Dynamic Events ◽  
Safety Systems

Abstract Much progress has been made over recent years in understanding many aspects of driver-vehicle interactions, for example, linked to ergonomics/comfort of the cabin, influence of improved safety systems, interactions with ITS systems etc. However, in more dynamic situations, similar levels of understanding have not been achieved. Such dynamic events range from whole body motions such as vehicle handling and ride to component behaviour including, in particular, steering wheel feel and gearshift quality.

scholarly journals Modeling The Frontal Collison In Vehicles And Determining The Degree Of Injury On The Driver

2015 ◽  
Vol 67 (1) ◽  
pp. 115-120
Author(s):  
Oana Victoria Oţăt
Keyword(s):  
Dynamic Behaviour ◽  
Research Study ◽  
Research Paper ◽  
Passive Safety ◽  
Steering Wheel ◽  
Passive Safety Systems ◽  
Frontal Collision ◽  
Safety Systems

Abstract The present research study aims at analysing the kinematic and the dynamic behaviour of the vehicle’s driver in a frontal collision. Hence, a subsequent objective of the research paper is to establish the degree of injury suffered by the driver. Therefore, in order to achieve the objectives set, first, we had to define the type of the dummy placed in the position of the driver, and then to design the three-element assembly, i.e. the chair-steering wheel-dashboard assembly. Based on this model, the following step focused on the positioning of the dummy, which has also integrated the defining of the contacts between the components of the dummy and the seat elements. Seeking to model such a behaviour that would highly accurately reflect the driver’s movements in a frontal collision, passive safety systems have also been defined and simulated, namely the seatbelt and the frontal airbag.

Research on Algorithm to Improve Performance of Fluid-Assisted Polishing

2014 ◽  
Vol 602-605 ◽  
pp. 316-319
Author(s):  
Shao Song Wan ◽  
Jian Cao ◽  
Cong Yan
Keyword(s):  
Steering System ◽  
Steering Wheel ◽  
Response Property ◽  
Work Piece ◽  
Vehicle Handling ◽  
Directional Stability ◽  
Oil Tank ◽  
Input Response ◽  
Basic Experiments ◽  
Polishing Fluid

In present work, the distribution of electric field strength on the surface of work piece was analyzed through ANSYS and theoretical equation. Moreover, the attractive force acting on particles that disperses in ER polishing fluid was calculated. A series of basic experiments were conducted, it is aimed to find out the effective process parameters on the surface roughness using the work piece as electrode. Vehicle handling directional stability has been more and more important, experiments for steering wheel corner step input response, steering oil tank response property, steady state turning and steering angle of all steering wheels were conducted in this paper, the experimental results show that multi-wheel steering system can fulfill its function very well and reach target angle, it provides a new method for researching for the vehicle handling directional stability.

scholarly journals Biomechanical evaluation of SACH and uniaxial feet

1984 ◽  
Vol 8 (3) ◽  
pp. 147-154 ◽  
Author(s):  
J. C. H. Goh ◽  
S. E. Solomonidis ◽  
W. D. Spence ◽  
J. P. Paul
Keyword(s):  
Evaluation Method ◽  
Three Dimensional ◽  
Subjective Assessment ◽  
The United States ◽  
Whole Body ◽  
Assessment Procedure ◽  
Clear Trend ◽  
Gait Kinematics ◽  
Biomechanical Evaluation ◽  
Set Up

A review of prosthetic prescription practice reveals that in the United Kingdom about 85% of below and above-knee amputees are fitted with uniaxial feet, whereas in the United States about 80% are fitted with SACH feet. An evaluation method was developed to assess the performance of these two different types of feet. This included a subjective assessment procedure and a biomechanical evaluation of the function of the two feet and their effects on whole body gait kinematics and lower limb kinetics. Data were acquired by three Bolex H16 cine cameras and two Kistler force plates. This set-up allowed three-dimensional analysis on the prosthetic and contralateral sides of the subject. Investigations were undertaken in which an experimental prosthesis permitted the interchange of the ankle/foot while keeping the rest of the components the same. Altogether, six below knee and five above knee amputees were tested. No clear trend for preference for either type of foot was evident from the subjective survey; in general the patients showed a preference for the foot that they were accustomed to. Kinematic and kinetic analysis showed some differences in the function between the two prosthetic feet. It is the purpose of this paper to discuss these differences and their significance.

Research on Algorithm to Improve Performance of Multi-Wheel Steering Control System

2014 ◽  
Vol 989-994 ◽  
pp. 3177-3180
Author(s):  
Shao Song Wan ◽  
Jian Cao ◽  
Qun Song Zhu ◽  
Cong Yan
Keyword(s):  
Network Performance ◽  
Capacity Utilization ◽  
Steering System ◽  
Steering Wheel ◽  
Response Property ◽  
Steering Control ◽  
Vehicle Handling ◽  
Directional Stability ◽  
Oil Tank ◽  
Input Response

There are many factors that can affect network performance, such as delay, packet loss and capacity utilization. Vehicle handling directional stability has been more and more important, experiments for steering wheel corner step input response, steering oil tank response property, steady state turning and steering angle of all steering wheels were conducted in this paper, the experimental results show that multi-wheel steering system can fulfill its function very well and reach target angle, it provides a new method for researching for the vehicle handling directional stability.

scholarly journals Research on Torque Ratio Based on the Steering Wheel Torque Characteristic for Steer-by-Wire System

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Yandong Han ◽  
Lei He ◽  
Xiang Wang ◽  
Changfu Zong
Keyword(s):  
Force Feedback ◽  
Characteristic Curve ◽  
Transmission Ratio ◽  
Steering Wheel ◽  
Vehicle Handling ◽  
Design Goal ◽  
Torque Transmission ◽  
Steer By Wire ◽  
Wheel Torque ◽  
Wire System

Steer-by-wire system can improve the performance of vehicle handling stability. Removing the mechanical linkages between the front wheels and the steering wheel leads to a key technique of force feedback for steer-by-wire system. In view of the characteristic of variable torque transmission ratio for steer-by-wire system, this paper proposes a method for designing torque ratio based on the steering wheel torque characteristic for steer-by-wire system. It converts the torque ratio design into equivalent assist torque design by analyzing their relationship. It achieves the torque ratio design at different conditions based on the negative equivalent assist torque characteristic curve. Simulations and vehicle experiments are conducted by the proposed method, and the results show that the design goal has been achieved and the steering wheel torque characteristic obtained is very similar to that of the reference car.

16-Bit A/D CAN Interface Steering Wheel Angle and Torque Acquisition System

2013 ◽  
Vol 846-847 ◽  
pp. 144-147
Author(s):  
Yun Hu Zhang ◽  
Chao Zhang
Keyword(s):  
Data Collection ◽  
High Precision ◽  
Can Bus ◽  
Driving Behavior ◽  
Software Implementation ◽  
Host Computer ◽  
Steering Wheel ◽  
Torque Sensor ◽  
Vehicle Handling ◽  
Torque Values

In this paper, a steering wheel angle and torque acquisition program consisted of a steering wheel angle and torque sensor, 16-bit Σ-A/D converter, SCM and CAN bus chip is described. It describes the A / D conversion, angle and torque values calculation , CAN Communication and host computer acquisition software implementation and other important processes for the method. On this basis, the steering wheel angle and torque data collection realization is finished,and it has operated in the actual vehicle environments. The results show that the system is of high precision, good stability, and it is suitable for driving behavior tests and vehicle handling and stability test.

scholarly journals Challenges in the Automotive JIS/JIT Production of Steering Wheels Involving Traceability

2021 ◽  
Vol 18 (2) ◽  
pp. 42-46
Author(s):  
Horea Mizgan ◽  
Ovidiu Ambruş
Keyword(s):  
Automotive Industry ◽  
Production Systems ◽  
Steering Wheel ◽  
Just In Time ◽  
Process Sequence ◽  
Design Changes ◽  
Equipment Manufacturing ◽  
Jit Production ◽  
New Challenges ◽  
Safety Systems

Abstract The purpose of this article is to present the new challenges faced by the automotive industry and specifically by the steering wheel producers in terms of product design changes, process changes and the solution to solve them, the concept of TTM - Total Traceability Management. The article presents the traceability solution as a proved solution for managing JIS (Just in Sequency) & JIT (Just in Time) manufacturing concepts in terms of customer demand sequence attainment, process sequence attainment, and technical test verifications. The research is based on case studies deployed in production facilities, in the companies TRW and Key Safety Systems. Both entities are steering wheel producers with JIS&JIT conditioned production systems and are also using latest technology in synchronizing the traceability communication with various cars producers (Porsche, BMW, Daimler, etc.). This concept of manufacturing and delivery of the products to the famous automotive companies is crucial for the supplier including the base of business, because the entire work in this domain is completely automatic by robots. That means: all the final products (cars end others), including the components from different suppliers, also the technology of assembling, it need to be adapted in order to be performed by robots. The components as steering wheels, and many others, arrive at the assembling line at OEMs (Original Equipment Manufacturing) facilities and the robots work on directly the buffers with these components in order to ensure the continuous assembling process in the condition of total flexibility and without errors.

Upper Body Development of Full-Sized Humanoid, HART, for Vehicle-Driving Task

2019 ◽  
Author(s):  
Kiwon Sohn ◽  
Mark Markiewicz
Keyword(s):  
Low Cost ◽  
Upper Body ◽  
Whole Body ◽  
Steering Wheel ◽  
Body Development ◽  
Hardware Configuration ◽  
Driving Task ◽  
Electrical Components ◽  
Low Cost Manufacturing ◽  
Control System Architecture

Abstract In this paper, the development of an upper body for the full-sized humanoid, HART is presented. The main design objective of HART platform is to enable the bipedal robot to drive off-the-shelf vehicles in real world environments. Continued from the previous efforts which focused on the lower body, the same technical design requirements, kinematic adaptation and low cost manufacturing, were kept being explored for HART’s upper body building in this study. First, the control system architecture and whole body hardware configuration of the robot are presented. Then, the mechanical and electrical components of each joint and its design process are described. The kinematic analysis and motion trajectory generation are also provided for the vehicle-driving task such as steering-wheel manipulation. Last, the built platform is tested through experimentation using physical vehicles to evaluate the presented design.

Influence of Tire Characteristic Properties on the Vehicle Lateral Transient Response

1995 ◽  
Vol 23 (2) ◽  
pp. 72-95 ◽  
Author(s):  
C. Schröder ◽  
S. Chung
Keyword(s):  
Transient Response ◽  
Evaluation Method ◽  
Lateral Acceleration ◽  
Steering Wheel ◽  
Wheel Load ◽  
Vehicle Handling ◽  
Pulse Input ◽  
Simulation Techniques ◽  
Parameter Evaluation ◽  
Model Frequency

Abstract This paper summarizes results from a recent program of tire-vehicle system research, using simulation techniques to identify the influence of tire characteristics on the vehicle response functions of yaw rate and lateral acceleration. Tire characteristics such as cornering stiffness, cornering stiffness-wheel load dependency, self-aligning torque, and dynamic tire behavior were varied with respect to a control tire. Computer simulations of vehicles undergoing a steering wheel pulse input were carried out using ADAMS full vehicle models and the Magic Formula tire model. Frequency responses were obtained from these vehicle handling simulations. The Four Parameter Evaluation Method of Lateral Transient Response was used to judge the vehicle handling performance. The influences of tire characteristic properties on the vehicle lateral transient response are explained by this method.

Improved handling characteristics of off-road vehicles by applying active control of steering wheel torque

2011 ◽  
Vol 2 (1) ◽  
pp. 66-74
Author(s):  
J. Kis ◽  
L. Jánosi
Keyword(s):  
Active Control ◽  
Research Work ◽  
Rear Wheel ◽  
Steering Wheel ◽  
Road Vehicles ◽  
Vehicle Handling ◽  
Handling Characteristics ◽  
Driving Speed ◽  
Wheel Torque ◽  
High Center

Driving speed of agricultural mobile machines have been increased in the recent years, raisingserious questions about vehicle handling characteristics considering the high center-of-gravity, multi-massconfiguration and rear-wheel-steering of these vehicles. The next generation of steering systems on offroad vehicles will incorporate a steering column mechatronic subsystem which will generate tactilefeedback for operator. This paper presents our research work to utilize steering wheel torque to improveoff-road vehicle handling characteristics.

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