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Journal ArticleDOI

Recent Research on Vehicle Noise and Vibration

01 Jan 2012-International Journal of Vehicle Noise and Vibration (Inderscience Publishers Ltd)-Vol. 8, Iss: 4, pp 289-301
TL;DR: In this paper, a summary of recent research in the general area of vehicle noise, vibration and harshness (NVH) with an emphasis in the automotive field is presented, followed up on a previous review and classifies the phenomena by the main sources of NVH into powertrain, road and tyre, wind and other NVH.
Abstract: Vehicle noise, vibration and harshness (NVH) is usually among the top five attributes in terms of its priority in the design of automotive vehicles. Its priority in other types of vehicles (e.g., aerospace) is also important. Like other attributes of safety, performance, dynamics, fuel economy, NVH has to be considered closely in the design process. This manuscript presents a summary of recent research in the general area of NVH with an emphasis in the automotive field. It follows up on a previous review and classifies the phenomena by the main sources of NVH into powertrain, road and tyre, wind and other NVH. The last includes brake and chassis, squeak and rattle, electromechanical NVH, exterior (or drive-by) NVH and others. The paper provides a review of some of the recent literature in this field.
Citations
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Journal ArticleDOI
TL;DR: The novel concept of the loss of driver controllability is introduced here, and traditional comfort measures are examined and autonomous passenger awareness factors are proposed and path-planning methods are categorized in light of the offered factors.
Abstract: The prospect of driverless cars wide-scale deployment is imminent owing to the advances in robotics, computational power, communications, and sensor technologies. This promises highway fatality reductions and improvements in traffic and fuel efficiency. Our understanding of the effects arising from commuting in autonomous cars is still limited. The novel concept of the loss of driver controllability is introduced here. It requires a reassessment of vehicle's comfort criteria. In this review paper, traditional comfort measures are examined and autonomous passenger awareness factors are proposed. We categorize path-planning methods in light of the offered factors. The objective of the review presented in this article is to highlight the gap in path planning from a passenger comfort perspective and propose some research solutions. It is expected that this investigation will generate more research interest and bring innovative solutions into this field.

252 citations

Journal ArticleDOI
TL;DR: A compact state-of-the-art review of both NVH characteristics and relevant suppression methods for HEVs that can provide both substantially improved ride-comfort and reduced energy-consumption is provided.
Abstract: The need for more efficient and renewable means of transport makes the development of hybrid electric vehicles (HEVs) an important topic for both automobile manufacturers and academic researchers. Noise, vibration, and harshness (NVH) of a vehicle are important factors for vehicle users and essential for successful commercialization of this vehicle type. This paper is a compact state-of-the-art review of both NVH characteristics and relevant suppression methods for HEVs. The NVH-related problems are categorized into three categories: engine, powertrain, motor-related. A detailed overview of each category/problem-type is provided, the NVH-suppression methods for different types of HEVs are introduced, and their respective advantages discussed. In addition, emerging developments and ideas for future improvements are summarized. As a result, the paper should be particularly helpful for researchers, who are interested in the development of high-performance HEVs that can provide both substantially improved ride-comfort and reduced energy-consumption.

135 citations

Journal ArticleDOI
TL;DR: Younger drivers showed higher comfort, enjoyment and acceptance with familiar automateddriving styles, whereas older drivers preferred unfamiliar, automated driving styles tending to be faster than their age-affected manual driving styles.
Abstract: Automated driving has the potential to improve the safety and efficiency of future traffic and to extend elderly peoples' driving life, provided it is perceived as comfortable and joyful and is accepted by drivers. Driving comfort could be enhanced by familiar automated driving styles based on drivers' manual driving styles. In a two-stage driving simulator study, effects of driving automation and driving style familiarity on driving comfort, enjoyment and system acceptance were examined. Twenty younger and 20 older drivers performed a manual and four automated drives of different driving style familiarity. Acceptance, comfort and enjoyment were assessed after driving with standardised questionnaires, discomfort during driving via handset control. Automation increased both age groups' comfort, but decreased younger drivers' enjoyment. Younger drivers showed higher comfort, enjoyment and acceptance with familiar automated driving styles, whereas older drivers preferred unfamiliar, automated driving styles tending to be faster than their age-affected manual driving styles. Practitioner Summary: Automated driving needs to be comfortable and enjoyable to be accepted by drivers, which could be enhanced by driving style individualisation. This approach was evaluated in a two-stage driving simulator study for different age groups. Younger drivers preferred familiar driving styles, whereas older drivers preferred driving styles unaffected by age.

129 citations


Cites background from "Recent Research on Vehicle Noise an..."

  • ...Noise, vibration and harshness have been identified as main variables affecting physiological driving comfort (Qatu 2012)....

    [...]

Journal ArticleDOI
TL;DR: This review gives a detailed description of different geometries of the components and the materials used in a disc brake system.
Abstract: Disc brakes have evolved over time to be a reliable method of decelerating and stopping a vehicle. There have been different designs of disc brake systems for different applications. This review gives a detailed description of different geometries of the components and the materials used in a disc brake system. In spite of all the improvements, there are still many operational issues related to disc brakes that need to be understood in greater detail and resolved. There has been a lot of research going on about these issues and at the same time different methods are being proposed to eliminate or reduce them. There has also been intensive fundamental research going on about the evolution of the tribological interface of the disc-pad system. One major purpose of the present paper is to give a comprehensive overview of all such developments.

42 citations

Journal ArticleDOI
TL;DR: It is concluded that phenomenological models are currently the most accurate and suitable models of predicting the bulk acoustic properties in the whole audible frequency range.
Abstract: Over the past 50 years, the characterisation of porous sound absorbing materials has been of increasing interest to both the acoustic engineers and customers. It is particularly important that acoustic engineers are able to predict the acoustical behaviour of these materials to get a quantitative measure of the acoustic energy absorption. This paper reviews the relevant literatures over this 50-year period and concludes that phenomenological models are currently the most accurate and suitable models of predicting the bulk acoustic properties in the whole audible frequency range. This review also presents the physical parameters which provide the link between the acoustical and material properties, as well as current experimental methods used to measure these parameters. Furthermore, the most common numerical methods for modelling porous materials are described.

38 citations

References
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MonographDOI
13 Dec 2006
TL;DR: The author explains how basic Equations of Elasticity, Laplace and Fourier Transforms, and Approximate Analytical Methods transformed into Eigenvalue and Modal Analysis Approach, which led to the modern Elastic Wave Propagation.
Abstract: Preface. Symbols. Chapter 1. Introduction: Basic Concepts and Terminology. Chapter 2. Vibration of Discrete Systems: Brief Review. Chapter 3. Derivation of Equations: Equilibrium Approach. Chapter 4. Derivation of Equations: Variation Approach. Chapter 5. Derivation of Equations: Integral Equation Approach. Chapter 6. Solution Procedure: Eigenvalue and Modal Analysis Approach. Chapter 7. Solution Procedure: Integral Transform Methods. Chapter 8. Transverse Vibration of Strings. Chapter 9. Longitudinal Vibration of Bars. Chapter 10. Torsional Vibration of Shafts. Chapter 11. Transverse Vibration of Beams. Chapter 12. Vibration of Circular Rings and Curved Beams. Chapter 13.Vibration of Membranes. Chapter 14. Transverse Vibration of Plates. Chapter 15. Vibration of Shells. Chapter 16. Elastic Wave Propagation. Chapter 17. Approximate Analytical Methods. A. Basic Equations of Elasticity. B. Laplace and Fourier Transforms. Index.

1,396 citations

Book
21 Sep 2011
TL;DR: In this article, the authors define multibody dynamics tailored to ground vehicles, including steering, suspension, and wheel and tire components, and apply them to a quarter car model and a three-dimensional vehicle.
Abstract: Introduction Units and Quantities Terminology Definitions Multibody Dynamics tailored to Ground Vehicles A Quarter Car Model Exercises Road Modeling Aspects Deterministic Profiles Random Profiles Exercises Tire Introduction Contact Geometry Steady State Forces and Torques Combined Forces Bore Torque Different Influences on Tire Forces and Torques First Order Tire Dynamics Exercises Drive Train Components and Concepts Wheel and Tire Differentials Transmission Clutch Power Sources Exercises Suspension System Purpose and Components Some Examples Steering Systems Kinematics of a Double Wishbone Suspension Exercises Force Elements Standard Force Elements Dynamic Force Elements Exercises Vertical Dynamics Goals From Complex to Simple Models Basic Tuning Optimal Damping Practical Aspects Nonlinear Suspension Forces Sky Hook Damper Exercises Longitudinal Dynamics Dynamic Wheel Loads Maximum Acceleration Driving and Braking Drive and Brake Pitch Exercises Lateral Dynamics Kinematic Approach Steady State Cornering Simple Handling Model Mechatronic Systems Exercises Driving Behavior of Single Vehicles Three-Dimensional Vehicle Model Driver Model Standard Driving Maneuvers Coach with Different Loading Conditions Different Rear Axle Concepts for a Passenger Car Exercises Bibliography Index

167 citations

Journal ArticleDOI
TL;DR: An overview of automotive NVH engineering can be found in this paper, where the authors classify the interior noise into powertrain-related NVH, road-and tyre-relatedNVH, and wind-related NEH.
Abstract: Vehicle noise, vibration and harshness (NVH) is an important vehicle attribute. It is usually among the top five attributes in terms of its priority in the design of any vehicle type. Like other attributes of safety, performance, dynamics and fuel economy, this attribute has to be considered closely in the design process. This manuscript presents an overview of automotive NVH engineering. It classifies the interior noise into powertrain-related NVH, road- and tyre-related NVH and wind-related NVH. This paper also discusses brake- and chassis-related NVH, squeak and rattle and electromechanical-related NVH. In addition, the paper addresses exterior NVH, frequently described as drive-by NVH. The phenomenon is divided into usual or expected NVH and unusual or unexpected NVH. The paper provides a review of some of the recent literature in the field of automotive NVH.

87 citations

Book
15 Jun 2008
TL;DR: A detailed and well-rounded overview of the dynamics of road vehicle systems is provided in this article, with specific focus on accident reconstruction and roll dynamics, as well as safety considerations are covered throughout the book.
Abstract: A detailed and well-rounded overview of the dynamics of road vehicle systems is provided in this book. 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. The authors’ emphasis on safety reflects growing consumer interest in vehicle safety. Safety considerations are covered throughout the book, with specific chapters on accident reconstruction and roll dynamics. The book focuses not only on mechanisms within a vehicle, but also on what the driver is trying to do.

71 citations