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Author : Kenneth Kwok-Ming Chong
Publisher :
ISBN 13 :
Total Pages : 146 pages
Book Rating : 4.:/5 (952 download)
Download or read book Real Time Simulation of Vehicle Dynamics Under Rollover and Crash Condition written by Kenneth Kwok-Ming Chong and published by . This book was released on 2004 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Annette L. Rizer
Publisher :
ISBN 13 :
Total Pages : 102 pages
Book Rating : 4.3/5 (91 download)
Download or read book Simulations of Vehicle Dynamics During Rollover. Final Report written by Annette L. Rizer and published by . This book was released on 1989 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dieter Schramm
Publisher : Springer
ISBN 13 : 3662544830
Total Pages : 450 pages
Book Rating : 4.6/5 (625 download)
Download or read book Vehicle Dynamics written by Dieter Schramm and published by Springer. This book was released on 2017-07-03 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors examine in detail the fundamentals and mathematical descriptions of the dynamics of automobiles. In this context, different levels of complexity are presented, starting with basic single-track models up to complex three-dimensional multi-body models. A particular focus is on the process of establishing mathematical models based on real cars and the validation of simulation results. The methods presented are explained in detail by means of selected application scenarios. In addition to some corrections, further application examples for standard driving maneuvers have been added for the present second edition. To take account of the increased use of driving simulators, both in research, and in industrial applications, a new section on the conception, implementation and application of driving simulators has been added.
Author : Mariana Alvarado Nava
Publisher :
ISBN 13 :
Total Pages : 190 pages
Book Rating : 4.:/5 (968 download)
Download or read book Vehicle Dynamics Using Computer Simulations and Event Data Recorders written by Mariana Alvarado Nava and published by . This book was released on 2016 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The police crash investigation department requires an engineering study of a vehicle crash before presenting a case to the judicial system. Vehicle crash reconstruction simulations establish new scientific basis for the judiciary system. Computer models are used to reconstruct the vehicle performance, since the dynamic performance of a vehicle collision cannot be repeated in real time. Vehicle dynamics is the engineering study of a vehicle based on mechanics and physics. This thesis uses modern techniques in combination with the information of Event Data Recorders (EDR) to help the judiciary system identify the safety parameters and condition of vehicles. The research analysis mainly focuses on the performance of police vehicles. The EDR is a device installed in the vehicle to record how the driver responds to a crash event. Since 2004 the event data recorders are mandatory in every vehicle. Also, the EDR is able to analyze the change in velocity of the vehicle at the time of the impact. The analysis of the change in velocity allows a base structure for computer simulation. A 3-D computer solid model of a 2004 Ford Crown Victoria is developed using Solidwoks. Also, dynamic computer simulations are developed using Adams View. The solid models consist of a tire assembly, a suspension assembly and a vehicle structure. These are assembled to form a complete model of the vehicle. The main objective is to analyze the vehicle's performance during tactile driving maneuverers. The second objective is to provide new alternative methods to demonstrate a crash reconstruction to the judicial system. This method will provide a simpler, faster, and more accurate analysis of a vehicle dynamics. Additionally, the outcome of these simulations will provide a theoretical basis for future vehicle design.
Author : Soltani Hamed
Publisher : LAP Lambert Academic Publishing
ISBN 13 : 9783659711190
Total Pages : 208 pages
Book Rating : 4.7/5 (111 download)
Download or read book Rollover Simulation, Validation, and Control Using Dynamic Models written by Soltani Hamed and published by LAP Lambert Academic Publishing. This book was released on 2015-05-13 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Driving simulation by using actual driving conditions in a virtual environment enable researcher to conduct various experiments. It will be an accurate and economy tool for in different areas such as vehicle dynamic control, intelligent transportation systems and traffic safety. This study serves to advance vehicle dynamics simulations and controls with a primary focus on rollover propensity. The main consideration in determining fundamental vehicle handling propensities was the vehicle characterization maneuver known as slowly increasing steer (SIS). The rollover maneuvers used were the National Highway Transportation Safety Administration (NHTSA) J-Turn and fishhook maneuvers. These maneuvers were selected due to their higher potential rollover propensity. The simulation models used for the study are Vehicle Dynamic Analysis Non Linear (VDANL) and Human Vehicle Environment (HVE).
Author : Kun Jiang
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (126 download)
Download or read book Real-time Estimation and Diagnosis of Vehicle's Dynamics States with Low-cost Sensors in Different Driving Condition written by Kun Jiang and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enhancing road safety by developing active safety system is the general purpose of this thesis. A challenging task in the development of active safety system is to get accurate information about immeasurable vehicle dynamics states. More specifically, we need to estimate the vertical load, the lateral frictional force and longitudinal frictional force at each wheel, and also the sideslip angle at center of gravity. These states are the key parameters that could optimize the control of vehicle's stability. The estimation of vertical load at each tire enables the evaluation of the risk of rollover. Estimation of tire lateral forces could help the control system reduce the lateral slip and prevent the situation like spinning and drift out. Tire longitudinal forces can also greatly influence the performance of vehicle. The sideslip angle is one of the most important parameter to control the lateral dynamics of vehicle. However, in the current market, very few safety systems are based on tire forces, due to the lack of cost-effective method to get these information. For all the above reasons, we would like to develop a perception system to monitor these vehicle dynamics states by using only low-cost sensor. In order to achieve this objective, we propose to develop novel observers to estimate unmeasured states. However, construction of an observer which could provide satisfactory performance at all condition is never simple. It requires : 1, accurate and efficient models; 2, a robust estimation algorithm; 3, considering the parameter variation and sensor errors. As motivated by these requirements, this dissertation is organized to present our contribution in three aspects : vehicle dynamics modelization, observer design and adaptive estimation. In the aspect of modeling, we propose several new models to describe vehicle dynamics. The existent models are obtained by simplifying the vehicle motion as a planar motion. In the proposed models, we described the vehicle motion as a 3D motion and considered the effects of road inclination. Then for the vertical dynamics, we propose to incorporate the suspension deflection to calculate the transfer of vertical load. For the lateral dynamics, we propose the model of transfer of lateral forces to describe the interaction between left wheel and right wheel. With this new model, the lateral force at each tire can be calculated without sideslip angle. Similarly, for longitudinal dynamics, we also propose the model of transfer of longitudinal forces to calculate the longitudinal force at each tire. In the aspect of observer design, we propose a novel observation system, which is consisted of four individual observers connected in a cascaded way. The four observers are developed for the estimation of vertical tire force, lateral tire force and longitudinal tire force and sideslip angle respectively. For the linear system, the Kalman filter is employed. While for the nonlinear system, the EKF, UKF and PF are applied to minimize the estimation errors. In the aspect of adaptive estimation, we propose the algorithms to improve sensor measurement and estimate vehicle parameters in order to stay robust in presence of parameter variation and sensor errors. Furthermore, we also propose to incorporate the digital map to enhance the estimation accuracy. The utilization of digital map could also enable the prediction of vehicle dynamics states and prevent the road accidents. Finally, we implement our algorithm in the experimental vehicle to realize real-time estimation. Experimental data has validated the proposed algorithm.
Author : Moustapha Doumiati
Publisher : John Wiley & Sons
ISBN 13 : 1118579003
Total Pages : 215 pages
Book Rating : 4.1/5 (185 download)
Download or read book Vehicle Dynamics Estimation using Kalman Filtering written by Moustapha Doumiati and published by John Wiley & Sons. This book was released on 2012-12-14 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vehicle dynamics and stability have been of considerable interest for a number of years. The obvious dilemma is that people naturally desire to drive faster and faster yet expect their vehicles to be “infinitely” stable and safe during all normal and emergency maneuvers. For the most part, people pay little attention to the limited handling potential of their vehicles until some unusual behavior is observed that often results in accidents and even fatalities. This book presents several model-based estimation methods which involve information from current potential-integrable sensors. Improving vehicle control and stabilization is possible when vehicle dynamic variables are known. The fundamental problem is that some essential variables related to tire/road friction are difficult to measure because of technical and economical reasons. Therefore, these data must be estimated. It is against this background, that this book’s objective is to develop estimators in order to estimate the vehicle’s load transfer, the sideslip angle, and the vertical and lateral tire/road forces using a roll model. The proposed estimation processes are based on the state observer (Kalman filtering) theory and the dynamic response of a vehicle instrumented with standard sensors. These estimators are able to work in real time in normal and critical driving situations. Performances are tested using an experimental car in real driving situations. This is exactly the focus of this book, providing students, technicians and engineers from the automobile field with a theoretical basis and some practical algorithms useful for estimating vehicle dynamics in real-time during vehicle motion.
Author : Jerzy Kisilowski
Publisher : Springer Nature
ISBN 13 : 3030913988
Total Pages : 309 pages
Book Rating : 4.0/5 (39 download)
Download or read book Modeling of Road Traffic Events written by Jerzy Kisilowski and published by Springer Nature. This book was released on 2022-01-01 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: This books reviews and brings readers up to date with the latest research knowledge on road traffic safety. It describes and discusses mathematical descriptions of the process of a motor vehicle crash and indicates the various factors that impact on collision models. It tackles also vehicle stability and shows how the forces generated in crashes result in different extents of post-accident repair. Mathematical models that simulate vehicle stability data are compared with those of real vehicles. Practical uses of the models are explained to readers. The book will be of interest to researchers in transport and vehicle technology well as automotive industry professionals.
Author : Matthew Huang
Publisher : CRC Press
ISBN 13 : 142004186X
Total Pages : 499 pages
Book Rating : 4.4/5 (2 download)
Download or read book Vehicle Crash Mechanics written by Matthew Huang and published by CRC Press. This book was released on 2002-06-19 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: Governed by strict regulations and the intricate balance of complex interactions among variables, the application of mechanics to vehicle crashworthiness is not a simple task. It demands a solid understanding of the fundamentals, careful analysis, and practical knowledge of the tools and techniques of that analysis. Vehicle Crash Mechanics s
Author : Christopher D Armstrong
Publisher : SAE International
ISBN 13 : 0768095247
Total Pages : 484 pages
Book Rating : 4.7/5 (68 download)
Download or read book Rollover Accident Reconstruction written by Christopher D Armstrong and published by SAE International. This book was released on 2018-11-02 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collision Reconstruction Methodologies - Volume 6B - The last ten years have seen explosive growth in the technology available to the collision analyst, changing the way reconstruction is practiced in fundamental ways. The greatest technological advances for the crash reconstruction community have come in the realms of photogrammetry and digital media analysis. The widespread use of scanning technology has facilitated the implementation of powerful new tools to digitize forensic data, create 3D models and visualize and analyze crash vehicles and environments. The introduction of unmanned aerial systems and standardization of crash data recorders to the crash reconstruction community have enhanced the ability of a crash analyst to visualize and model the components of a crash reconstruction. Because of the technological changes occurring in the industry, many SAE papers have been written to address the validation and use of new tools for collision reconstruction. Collision Reconstruction Methodologies Volumes 1-12 bring together seminal SAE technical papers surrounding advancements in the crash reconstruction field. Topics featured in the series include: • Night Vision Study and Photogrammetry • Vehicle Event Data Recorders • Motorcycle, Heavy Vehicle, Bicycle and Pedestrian Accident Reconstruction The goal is to provide the latest technologies and methodologies being introduced into collision reconstruction - appealing to crash analysts, consultants and safety engineers alike.
Author : Kushal Mohan
Publisher :
ISBN 13 :
Total Pages : 70 pages
Book Rating : 4.:/5 (19 download)
Download or read book Modeling and Simulation of an All Terrain Vehicle Dynamic Responses and Its Driver on an Uneven Terrain, in Rollover, and in Frontal Flip Crashes written by Kushal Mohan and published by . This book was released on 2018 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new interest in the field of dynamic response analysis is expanding as the number of accidents involving the all-terrain vehicles (ATV) are increasing in daily life. All-terrain vehicles are four wheeled motorbikes made for off-road utilities and recreation. The vehicle safety is an important feature to the public and automotive industry. Accident statistics show that deaths have been increasing year after year for this category of ATV accidents. This is due to several factors including, unsupervised and careless driving habits of the human beings and tendency of these vehicles to undergo unsafe dynamics. Rollover and Frontal flips are two of the table toppers in this category of injuries. The aim of this thesis is to reconstruct the dynamic response of an all-terrain vehicle and its driver in typical crashes. First the dynamics of the vehicle on an uneven road is examined. Next, among all the crash causes, two types of crash simulations; i.e., side rollover and frontal flip are considered. These simulations are carried out using the multibody dynamics simulation tool MSC-ADAMS and the occupant safety design analyzing tool MADYMO. The primary tasks of this thesis are (i) creating an ATV computer model, (ii) creating three different tracks for uneven road performance, roll over and frontal flip simulations (iii) including a hybrid III 50th percentile dummy to analyze the potential injuries and fatalities in these events. The results are analyzed and compared with the awareness of various specifications. Overall the study indicates that the ATV accidents could pose significant potential for injury and fatality to the driver.
Author : Dario Vangi
Publisher : Butterworth-Heinemann
ISBN 13 : 0128127511
Total Pages : 215 pages
Book Rating : 4.1/5 (281 download)
Download or read book Vehicle Collision Dynamics written by Dario Vangi and published by Butterworth-Heinemann. This book was released on 2020-01-15 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vehicle Collision Dynamics provides a unified framework and timely collection of up-to-date results on front crash, side crash and car to car crashes. The book is ideal as a reference, with an approach that's simple, clear, and easy to comprehend. As the mathematical and software-based modelling and analysis of vehicle crash scenarios have not been systematically investigated, this is an ideal source for further study. Numerous academic and industry studies have analyzed vehicle safety during physical crash scenarios, thus material responses during crashes serve as one of the most important performance indices for mechanical design problems. In addition to mathematical methodologies, this book provides thorough coverage of computer simulations, software-based modeling, and an analysis of methods capable of providing more flexibility. - Unifies existing and emerging concepts concerning vehicle crash dynamics - Provides a series of latest results in mathematical-based modeling from front and oblique perspectives - Contains almost everything needed to capture the essence of model development and analysis for vehicle crash - Includes both numerical and simulation results given in each chapter - Presents a comprehensive, up-to-date reference that encourages further study
Author : Mark Rolland Knight
Publisher :
ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.:/5 (518 download)
Download or read book Simulation of Vehicle Collisions in Real Time written by Mark Rolland Knight and published by . This book was released on 2002 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Typical vehicle simulations require numerical integration at an integration time step no larger than 0.01 seconds, usually less than half that time. This does not leave enough time to carry out the complex calculations required for detailed collision calculations in real time. This thesis presents a method that strikes a compromise, which, although not carrying all the detail necessary for very accurate collision calculations, allows useful simulations to proceed in real time. The method has three parts: collision detection, estimation of the momentum transfer expected to result from the collision, and application of forces in real time to provide the desired momentum transfer. The method uses a common scene graph for collision detection, which allows the system to work with most of the common scene database formats without the need of specialized preprocessing. All of the collision detection and response calculations employ open-source code and are designed to work well at speeds required by real-time vehicle simulation. Examples based on VDANL vehicle dynamics simulation illustrate the utility of the methodology.
Author : Zhilin Jin
Publisher : Springer Nature
ISBN 13 : 3031015002
Total Pages : 116 pages
Book Rating : 4.0/5 (31 download)
Download or read book Dynamic Stability and Control of Tripped and Untripped Vehicle Rollover written by Zhilin Jin and published by Springer Nature. This book was released on 2022-06-01 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vehicle rollover accidents have been a serious safety problem for the last three decades. Although rollovers are a small percentage of all traffic accidents, they do account for a large proportion of severe and fatal injuries. Specifically, some large passenger vehicles, such as large vans, pickup trucks, and sport utility vehicles, are more prone to rollover accidents with a high center of gravity (CG) and narrow track width. Vehicle rollover accidents may be grouped into two categories: tripped and untripped rollovers. A tripped rollover commonly occurs when a vehicle skids and digs its tires into soft soil or hits a tripping mechanism such as a curb with a sufficiently large lateral velocity. On the other hand, the untripped rollover is induced by extreme maneuvers during critical driving situations, such as excessive speed during cornering, obstacle avoidance, and severe lane change maneuver. In these situations, the forces at the tire-road contact point are large enough to cause the vehicle to roll over. Furthermore, vehicle rollover may occur due to external disturbances such as side-wind and steering excitation. Therefore, it is necessary to investigate the dynamic stability and control of tripped and untripped vehicle rollover so as to avoid vehicle rollover accidents. In this book, different dynamic models are used to describe the vehicle rollover under both untripped and special tripped situations. From the vehicle dynamics theory, rollover indices are deduced, and the dynamic stabilities of vehicle rollover are analyzed. In addition, some active control strategies are discussed to improve the anti-rollover performance of the vehicle.
Author :
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (327 download)
Download or read book NADS written by and published by . This book was released on 2003 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rao V Dukkipati
Publisher : SAE International
ISBN 13 : 0768043468
Total Pages : 874 pages
Book Rating : 4.7/5 (68 download)
Download or read book Road Vehicle Dynamics written by Rao V Dukkipati and published by SAE International. This book was released on 2008-06-19 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a detailed and well-rounded overview of the dynamics of road vehicle systems. Readers will come to understand how physical laws, human factor considerations, and design choices come together to affect a vehicle's ride, handling, braking, and acceleration. Following an introduction and general review of dynamics, topics include: analysis of dynamic systems; tire dynamics; ride dynamics; vehicle rollover analysis; handling dynamics; braking; acceleration; and total vehicle dynamics.
Author :
Publisher :
ISBN 13 :
Total Pages : 93 pages
Book Rating : 4.:/5 (222 download)
Download or read book Simulations of Vehicle Dynamics During Rollover written by and published by . This book was released on 1989 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:
