Download or read book Development of Vehicle Rollover Maneuver No distinctive title written by Roy S. Rice and published by . This book was released on 1978 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Vehicle Rollover Maneuver Executive summary written by Roy S. Rice and published by . This book was released on 1978 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Vehicle Rollover Maneuver No distinctive title written by Roy S. Rice and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Vehicle Rollover Maneuver Volume I Final Report written by R. S. Rice and published by . This book was released on 1978 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Vehicle Rollover Maneuver written by Roy S. Rice and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Vehicle Rollover Maneuver Executive summary written by Roy S. Rice and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Vehicle Rollover Maneuver Volume II Executive Summary Report written by R. S. Rice and published by . This book was released on 1978 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling of Maneuver Induced Vehicle Rollover written by Dhanunjaya Chalumuri and published by . This book was released on 2005 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Development of Rollover Maneuvers Using Optimization Techniques written by O. Balling and published by . This book was released on 2004 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The continuing increase of routinely available computing power now allows optimization with objective functions based on time domain simulations of vehicle dynamics. This paper uses this technique to determine the steering controls which lead to very large transient lateral load transfer. The vehicle simulation uses a yaw plane vehicle model with a very capable tire model. The steering controls to be optimized are a function of their Fourier coefficients. Examples using a SUV model illustrate that very inexpensive computing platforms are able to implement millions of time domain runs in a reasonably short time in support of the optimization. Comparisons with simulations of the NHSTA fishhook maneuver provide context for the results, which lead to simulated load transfer slightly in excess of the simulated NHTSA test. The optimized runs exhibit maximum load transfer well within the confines of a two lane highway.
Download or read book The National Highway Traffic Safety Administration s Rating System for Rollover Resistance written by National Research Council (U.S.). Committee for the Study of a Motor Vehicle Rollover Rating System and published by Transportation Research Board. This book was released on 2002 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explains that the static stability factor is an indicator of a vehicle's propensity to roll over, and that US government ratings for vehicles do not reflect differences in rollover resistance. This report states that the 5-star system should allow discrimination among vehicles and incorporate results from road tests that measure vehicle control.
Download or read book Dynamic Stability and Control of Tripped and Untripped Vehicle Rollover written by Zhilin Jin and published by . This book was released on 2019-05-30 with total page 120 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.
Download or read book Effects of Light Truck and Roadside Characteristics on Rollover Technical Summary written by Andrzej G. Nalecz and published by . This book was released on 1994 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Untripped Manoeuvre Induced Rollover Prevention for Sport Utility Vehicles written by Vincent Hermann Wehrmeyer and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Rollover accidents account for a high number of serious injuries and fatalities and thus it is greatly important to reduce the number of occurrences. Although a large number of rollovers result from factors external to the vehicle design such as environmental obstacles there is a significant portion of rollover accidents which are preventable. On-road untripped rollovers are directly related to the vehicle design. It is possible to do work in this area to improve vehicle-related safety factors. During rollover, lateral acceleration acts on the centre of gravity of the vehicle over turning it about the outer wheels. Thus the method to reduce or prevent rollover of this study stemmed from decreasing the overturning moment by reducing the movement arm though which the lateral acceleration acts. This is achieved by lower the ride height of the test vehicle using slow active suspension control of the test vehicle (Land Rover Defender 110) fitted with a hydro-pneumatic suspension system. An experimental validated mathematical model representing the test vehicle is created to develop a rollover prevention control system that reduces the vehiclea̲2́Ơ4́Øs ride height and reduces the propensity to rollover. The control system applies one of three discrete suspension settings depending on the severity of the manoeuvre as well as lowering the ride height. The model is used to simulate the Fishhook 1B and the ISO 3888 Double Lane Change manoeuvres to evaluate the roll prevention system. The rollover prevention control system improved the two wheel lift off speed of the vehicle through a Fishhook 1 B manoeuvre by 64%, the body roll angle of the vehicle through the Double Lane Change manoeuvre by 13% and the body roll rate by 25.7%. The control system significantly improved the vehiclea̲2́Ơ4́Øs response with regard to smooth flat on-road untripped rollover. Further improvements are possible with the use of the proposed control system in conjunction with a fully active suspension system to allow for faster corrective action.||Oorrol ongelukke is verantwoordelik vir a̲2́ƠË−n hoe aantal van ernstige beseerings en dodelike ongelukke en dus is dit van groot belang om die hoeveelheid ongelukke te verminder. Alhoewel meeste oorrol ongelukke is as gevolg van faktore anders as die voortuig se ontwerp, soos byvoorbeeld omgewingshindernisse, is daar a̲2́ƠË−n groot percentasie van oorrol ongelukke wat vermybaar is. On-pad onbelemmerde rollovers is direk verwant aan die voertuigontwerp. Dit is moontlik om werk in hierdie area te doen om voertuigverwante veiligheidsfaktore te verbeter. Tydens rolloverwerking tree laterale versnelling op die swaartepunt van die voertuig oor en draai dit om die buitenste wiele. Dus die metodiek in hierdie studie om oorrol te verminder of te verhoed, stem uit vermindering van die omkeer oomblik afgeneem, deur om die bewegingsarm waardeur die laterale versnelling werk, te verminder. Dit word behaal deur die rithoogte van die toetsvoertuig te verlaag deur gebruik te maak van 'n stadig aktiewe opskortingsbeheer van die toetsvoertuig (Land Rover Defender 110) wat met 'n hidro-pneumatiese suspensie stelsel toegerus is. 'N eksperimentele gevalideerde wiskundige model wat die toetsvoertuig verteenwoordig, word geskep om 'n rollover-voorkomingsbeheerstelsel te ontwikkel wat die voertuig se rithoogte verminder en die geneigdheid om oor te skakel, verminder. Die beheerstelsel pas een van drie diskrete skorsingsinstellings toe, afhangende van die erns van die maneuver asook die verlaging van die rithoogte. Die model word gebruik om die Fishhook 1B en die ISO 3888 Double Lane Change maneuvers te simuleer om die rolvoorkomingsisteem te evalueer. Die rollover-voorkomings-beheerstelsel het die twee-wiel oplig-snelheid van die voertuig verbeter deur 'n Fishhook 1 B-maneuver met 64%, die liggaamsrolhoek van die voertuig deur die Double Lane Change-maneuver met 13% en die liggaamsrolkoers met 25.7% te verbeter. Die beheersingsstelsel het die voertuig se reaksie aansienlik verbeter met betrekking tot gladde plat op-pad onbelemmerde oorrol. Verdere verbeterings is moontlik met die gebruik van die voorgestelde kontrolesisteem in samewerking met 'n ten volle aktiewe suspensie om vinniger regstellende aksie toe te laat.
Download or read book Recent Developments in Automotive Safety Technology written by Daniel J Holt and published by SAE International. This book was released on 2004-09-23 with total page 697 pages. Available in PDF, EPUB and Kindle. Book excerpt: Automotive engineers have been working to improve vehicle safety ever since the first car rolleddown some pathway well over 100 years ago. Today, there are many new technologies being developedthat will improve the safety of future vehicles. Featuring the 69 best safety-related SAE technical papers of 2003, this book provides the most comprehensive information available on current and emerging developments in automotive safety. It gives readers a feel for the direction engineers are taking to reduce deaths and injuries of vehicle occupants as well as pedestrians. All of the papers selected for this book meet the criteria for inclusion in SAE Transactions--the definitive collection of the year's best technical research in automotive engineering technology.
Download or read book Rollover of Heavy Commercial Vehicles written by C.B Winkler and published by . This book was released on 1999 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Vehicles in use Sub limit Maneuvers Volume II Technical Report Final Report written by D. E. Johnston and published by . This book was released on 1977 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
