Virtual Force Field Based of Force-Feedback of Road Condition for Driving Assistant Design in Electric Vehicle

2011 ◽  
Vol 5 (6) ◽  
pp. 908-915 ◽  
Author(s):  
Jerome Carlier ◽  
◽  
Toshiyuki Murakami
Keyword(s):  
Force Field ◽  
Force Feedback ◽  
Driving Simulator ◽  
Road Accidents ◽  
Virtual Force ◽  
Steer By Wire ◽  
Road Condition ◽  
New Strategy ◽  
The Common ◽  
Wire System

Most of the common road accidents are due to the driver’s inappropriate behavior, lack of attention, tiredness, and road conditions which usually cause the vehicle to deviate from the roadway or crash into others. Although, thanks to the Steer-by-Wire system, recent research showed that is now possible to enhance vehicles’ manipulability and users’ safety by stimulating the drivers to react efficiently in common and critical situations. This paper describes a new strategy to assist the driver in his trajectories’ planning on a multiple-lane highway. A driving assistant is here designed to give appropriate and continuous tactile feedbacks generated from a virtual force field present in the roadway’s environment. First, the assistant algorithm global structure is presented. Then, a road condition dependant virtual force field based driving input is designed in order to avoid road deviations as well as to enhance safety in presence of potentially dangerous road conditions, as lack of adherence and visibility. The performance of the system is evaluated firstly through preliminary simulations, and then confirmed on a driving simulator.

Evaluation of Deadband Effect in Steer-by-Wire Force Feedback System by Using Driving Simulator

2014 ◽  
Vol 619 ◽  
pp. 288-291 ◽  
Author(s):  
Nuksit Noomwongs ◽  
Sunhapos Chantranuwathana
Keyword(s):  
Force Feedback ◽  
Driving Simulator ◽  
Feedback System ◽  
Dead Band ◽  
Feedback Model ◽  
Band Size ◽  
Steer By Wire ◽  
Wire System

This paper presents an evaluation of dead band in force feedback which affects on driving precision with Steer-by-Wire System by using Driving Simulator. Dead band is considered as a zero zone of a relation between Force feedback torque and hand wheel angle. Experimental was designed to focus on dead band size from 0 to ±10 degrees of Force feedback model. The result has shown that the driver has the best driving precision with dead band size of ±4 to ±6 degrees.

Design of MRF-Damper-Based Experimental System for Steer-by-Wire Force Feedback Study

2011 ◽  
Vol 101-102 ◽  
pp. 1177-1180
Author(s):  
Chao Bing Huang ◽  
Di Zheng ◽  
Zai He Yu ◽  
Li Yong Hu
Keyword(s):  
Force Feedback ◽  
General Structure ◽  
Experimental System ◽  
Haptic System ◽  
Steer By Wire ◽  
Wire System

In order to meet the requirements of research on steer-by-wire force feedback, a MRF- damper-based experimental system was developed. In the paper, the necessity of the experimental system was analyzed, the general structure and hardware components were introduced. The design of the rotary MRF dampers was illuminated in detail. Experiments showed that the MRF-damper-based haptic system can be used for the study of automobile steer-by-wire system.

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.

Application of thermodynamics of systems in a force field to the equilibrium properties of real fluids. Basic relations for pure substances

1982 ◽  
Vol 47 (8) ◽  
pp. 2170-2179
Author(s):  
Emerich Erdös
Keyword(s):  
Force Field ◽  
Intermolecular Forces ◽  
Point Of View ◽  
External Force Field ◽  
Virtual Force ◽  
Statistical Mechanical ◽  
Pure Substances ◽  
The Common ◽  
Real Fluids ◽  
State Functions

The real fluid, between the molecules of which intermolecular forces are acting is regarded as an ideal fluid without molecular interaction situated in an external force field. A force potential is assigned to this virtual force field, and it is shown that all the equilibrium properties of real fluids can be expressed in terms of this virtual potential or/and of its derivatives. Equations are given, expressing the common state functions of pure substances as functions of the virtual potential. In addition, it is shown that close relationships do exist between the approach mentioned above and the known fundamental approaches, such as the dynamical and statistical-mechanical one. Therefrom it is evident that the approach proposed here represents an additional alternative for the description of equilibrium properties of fluids which is equivalent to the existing approaches from the formal point of view.

Development of a Steer-by-Wire System with Force Feedback Using a Disturbance Observer

2004 ◽  
Author(s):  
Shoji Asai ◽  
Hiroshi Kuroyanagi ◽  
Shinji Takeuchi ◽  
Toshihiro Takahashi ◽  
Shoji Ogawa
Keyword(s):  
Disturbance Observer ◽  
Force Feedback ◽  
Steer By Wire ◽  
Wire System

Design and Finite Element Modal Analysis of Torque Feedback Subsystem in Automobile Steer by Wire System

2012 ◽  
Vol 253-255 ◽  
pp. 2163-2167
Author(s):  
Lei Yan Yu ◽  
Wan Zhong Zhao ◽  
Jian Bo Yi
Keyword(s):  
Modal Analysis ◽  
Force Feedback ◽  
Mechanical Parts ◽  
Contour Maps ◽  
Steer By Wire ◽  
Speed Reducer ◽  
Safety And Reliability ◽  
Drive Speed ◽  
Vibration Performance ◽  
Wire System

Safety and reliability are requirements of automobile steer by wire system. Firstly, steering force feedback subsystem of steer by wire is designed. Design of steer by wire system mechanical parts must consider effects of automobile vibration environment. Then, worm of worm drive speed reducer is modeled using ANSYS software and modal analysis is performed. Natural frequencies and vibration mode contour maps of each order are acquired. The results show that the modal analysis of worm is valid and can predict worm’s vibration performance; both structure and material affect the part’s vibration performances.

Rotary MR Actuators for Automotive Comfort Functionalities

2008 ◽  
Author(s):  
A. Wiehe ◽  
M. Aust ◽  
J. Maas
Keyword(s):  
Response Time ◽  
Motion Control ◽  
Eddy Current ◽  
Force Feedback ◽  
Modeling Method ◽  
Steer By Wire ◽  
Wire System

Improvement of comfort functionalities is an important distinguishing mark for competitiveness of automotive manufactures. The utilization of rotary MR actuators offers several new comfort functionalities. As an example an entry assist function is described in the following, where a rotary MR actuator is used for motion control of vehicle doors. Another possible application is force feedback generation for a steer-by-wire system. Furthermore a modeling method for eddy current phenomena is proposed, which can be used for optimizing the response time of MR actuators.

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