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An Investigation Of The Rollover Dynamics Of A Military Vehicle


An Investigation Of The Rollover Dynamics Of A Military Vehicle
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An Investigation Of The Rollover Dynamics Of A Military Vehicle


An Investigation Of The Rollover Dynamics Of A Military Vehicle
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Author : Robin Sharp
language : en
Publisher:
Release Date : 1979

An Investigation Of The Rollover Dynamics Of A Military Vehicle written by Robin Sharp and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with categories.




Dynamic Stability And Control Of Tripped And Untripped Vehicle Rollover


Dynamic Stability And Control Of Tripped And Untripped Vehicle Rollover
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Author : Zhilin Jin
language : en
Publisher: Morgan & Claypool Publishers
Release Date : 2019-05-30

Dynamic Stability And Control Of Tripped And Untripped Vehicle Rollover written by Zhilin Jin and has been published by Morgan & Claypool Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-05-30 with Technology & Engineering categories.


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.



Controller Design For Stability And Rollover Prevention Of Multi Body Ground Vehicles With Uncertain Dynamics And Faults


Controller Design For Stability And Rollover Prevention Of Multi Body Ground Vehicles With Uncertain Dynamics And Faults
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Author : Hsun-Hsuan Huang
language : en
Publisher:
Release Date : 2009

Controller Design For Stability And Rollover Prevention Of Multi Body Ground Vehicles With Uncertain Dynamics And Faults written by Hsun-Hsuan Huang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.


Abstract: Rollover prevention is a fundamental and significant issue for vehicle safety research. Passenger and commercial vehicles with a relatively high center of gravity are especially prone to rollover. Rollover is a threat especially for military vehicles, which operate in severe operational environments and maneuvers. Additional assistance from active anti-rollover control systems can mitigate the deficiency in human capability. Furthermore, the ant-rollover control systems have to accommodate perturbations in the rollover parameters (e.g., speed and road adhesion coefficient) and external disturbances (such as adverse weather and terrain conditions) and have to be fault-tolerant in order to enhance rollover prevention. Thus, with rollover prevention of military multi-body ground vehicles as the objective of this research, in this dissertation, we first propose a novel control system analysis and design technique by extending the popular Linear Quadratic Regulator (LQR) control design method specializing it for the 'control coupled output regulation' problem. Specifically, in this rollover prevention problem, a 'unified rollover index' is proposed, which captures both the roll dynamics and lateral dynamics, explicitly into the optimization procedure of the LQR framework, which results in a performance index with a coupled term in state and control variables. Thus, the proposed rollover prevention technique effectively incorporates the physical nature of the vehicle dynamics into the problem formulation resulting in significantly improved performance. Moreover, the proposed technique allows us to compare different controller configurations and select the most efficient controller structure in terms of both control effort as well as cost. It is shown that because of the inherent coupling the system has, sometimes it is possible that a well designed single controller (actuator) can result in better performance than multiple controllers (actuators) with improper design. The proposed methodology is illustrated with two applications in the vehicle dynamics area. In the first application, an active steering control system is designed which shows the improved roll over prevention capability of the proposed design compared to the existing designs in the literature. The second application considers a more complicated tractor semi-trailer vehicle and shows how a single active anti-roll bar system at the trailer unit gives better performance than multiple-axle actuators at tractor and trailer together with the double lane change maneuver as the external disturbance. Next the issue of robust control design to handle uncertainties in the vehicle dynamics parameters as well as component faults. Based on the theory of 'Linear interval parameter matrix families', a single robust full state feedback control gain is designed by a convex combination of the control gains designed for finite points (vertices) of the uncertain parameter space. The uncertainty in the forward speed of the vehicle and the road adhesion coefficient are considered I the he proposed robust controller design. The results show the efficacy of the proposed robust controller under the assumed perturbations. Therefore, the proposed techniques not only prevent rollover of multi-body ground vehicles with controllers of reduced control effort (which means actuator and power savings) but also guarantee the stability and performance for vehicles with uncertain dynamics and faults.



High Speed Off Road Vehicles


High Speed Off Road Vehicles
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Author : Bruce Maclaurin
language : en
Publisher: John Wiley & Sons
Release Date : 2018-09-17

High Speed Off Road Vehicles written by Bruce Maclaurin and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-17 with Technology & Engineering categories.


A concise reference that provides an overview of the design of high speed off-road vehicles High Speed Off-Road Vehicles is an excellent, in-depth review of vehicle performance in off-road conditions with a focus on key elements of the running gear systems of vehicles. In particular, elements such as suspension systems, wheels, tyres, and tracks are addressed in-depth. It is a well-written text that provides a pragmatic discussion of off-road vehicles from both a historical and analytical perspective. Some of the unique topics addressed in this book include link and flexible tracks, ride performance of tracked vehicles, and active and semi-active suspension systems for both armoured and unarmoured vehicles. The book provides spreadsheet-based analytic approaches to model these topic areas giving insight into steering, handling, and overall performance of both tracked and wheeled systems. The author further extends these analyses to soft soil scenarios and thoroughly addresses rollover situations. The text also provides some insight into more advanced articulated systems. High Speed Off-Road Vehicles: Suspensions, Tracks, Wheels and Dynamics provides valuable coverage of: Tracked and wheeled vehicles Suspension component design and characteristics, vehicle ride performance, link track component design and characteristics, flexible track, and testing of active suspension test vehicles General vehicle configurations for combat and logistic vehicles, suspension performance modelling and measurement, steering performance, and the effects of limited slip differentials on the soft soil traction and steering behavior of vehicles Written from a very practical perspective, and based on the author’s extensive experience, High Speed Off-Road Vehicles provides an excellent introduction to off-road vehicles and will be a helpful reference text for those practicing design and analysis of such systems.



Vehicle Dynamics And Rollover Propensity Research


Vehicle Dynamics And Rollover Propensity Research
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Author :
language : en
Publisher:
Release Date : 1992

Vehicle Dynamics And Rollover Propensity Research written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.




A Study Of The Vehicle Ride Dynamics Aspect Of Ground Mobility


A Study Of The Vehicle Ride Dynamics Aspect Of Ground Mobility
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Author : B. D. Van Deusen
language : en
Publisher:
Release Date : 1965

A Study Of The Vehicle Ride Dynamics Aspect Of Ground Mobility written by B. D. Van Deusen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Vehicles categories.




Simulations Of Vehicle Dynamics During Rollover Final Report


Simulations Of Vehicle Dynamics During Rollover Final Report
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Author : Annette L. Rizer
language : en
Publisher:
Release Date : 1989

Simulations Of Vehicle Dynamics During Rollover Final Report written by Annette L. Rizer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.




The Dynamics Of Tank Vehicle Rollover And The Implications For Rollover Protection Devices


The Dynamics Of Tank Vehicle Rollover And The Implications For Rollover Protection Devices
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Author : C. B. Winkler
language : en
Publisher:
Release Date : 1998

The Dynamics Of Tank Vehicle Rollover And The Implications For Rollover Protection Devices written by C. B. Winkler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Tank truck accidents categories.




Fundamentals Of Vehicle Dynamics


Fundamentals Of Vehicle Dynamics
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Author : Thomas Gillespie
language : en
Publisher: SAE International
Release Date : 2021-04-29

Fundamentals Of Vehicle Dynamics written by Thomas Gillespie and has been published by SAE International this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-04-29 with Technology & Engineering categories.


A world-recognized expert in the science of vehicle dynamics, Dr. Thomas Gillespie has created an ideal reference book that has been used by engineers for 30 years, ranging from an introduction to the subject at the university level to a common sight on the desks of engineers throughout the world. As with the original printing, Fundamentals of Vehicle Dynamics, Revised Edition, strives to find a middle ground by balancing the need to provide detailed conceptual explanations of the engineering principles involved in the dynamics of ground vehicles with equations and example problems that clearly and concisely demonstrate how to apply such principles. A study of this book will ensure that the reader comes away with a solid foundation and is prepared to discuss the subject in detail. Ideal as much for a first course in vehicle dynamics as it is a professional reference, Fundamentals of Vehicle Dynamics, Revised Edition, maintains the tradition of the original by being easy to read and while receiving updates throughout in the form of modernized graphics and improved readability. Inasmuch as the first edition proved to be so popular, the Revised Edition intends to carry on that tradition for a new generation of engineers.



Military Vehicle Rollover Analysis And Instrumentation Phase I Final Report


Military Vehicle Rollover Analysis And Instrumentation Phase I Final Report
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Author : B. G. Brune
language : en
Publisher:
Release Date : 1979

Military Vehicle Rollover Analysis And Instrumentation Phase I Final Report written by B. G. Brune and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with categories.