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Mountain Bike Suspension Systems And Their Effect On Rider Performance Quantified Through Mechanical Psychological And Physiological Responses
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Book Synopsis Mountain Bike Suspension Systems and Their Effect on Rider Performance Quantified Through Mechanical, Psychological and Physiological Responses by : Mark C. Davie
Download or read book Mountain Bike Suspension Systems and Their Effect on Rider Performance Quantified Through Mechanical, Psychological and Physiological Responses written by Mark C. Davie and published by . This book was released on 2010 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mountain Bike Suspension Systems by : Mark Davie
Download or read book Mountain Bike Suspension Systems written by Mark Davie and published by LAP Lambert Academic Publishing. This book was released on 2011-04 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mountain bike suspension systems have been designed to improve riding performance and comfort for the cyclist. Additionally, a suspension system may reduce fatigue, energy expenditure, and enhance time trial performance. It has also been proposed, however, that using a rear suspension system on a mountain bike may be detrimental to the cyclist, causing the cyclist's energy to be dissipated via the rear suspension system. This book presents an investigation into mountain bike suspension systems and their effect on rider performance, quantifying the dynamic loads exerted on the bike frame and rider. Both the psychological and physiological effects of using a rear suspension system on cross-country cycling are also considered.
Book Synopsis Mountain Bike Rear Suspension Design: Utilizing a Magnetorheological Damper for Active Vibration Isolation and Performance by : Jacob R. Friesen
Download or read book Mountain Bike Rear Suspension Design: Utilizing a Magnetorheological Damper for Active Vibration Isolation and Performance written by Jacob R. Friesen and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The introduction of suspension systems to mountain bikes began in the late 1980's and early 1990's. These suspensions created two types of mountain bikes; the hardtail and the full suspension mountain bike. However, designers of full suspension bikes must balance the need for pedaling efficiency, which calls for a stiff suspension, with comfort and trail contact, which calls for a soft suspension. This thesis presents experimental and theoretical results from the development of a rear suspension system that has been designed for a mountain bike. A magnetorheological (MR) damper is used to design a rear suspension system that can balance the need of ride comfort through shock absorption and performance characteristics such as handling and pedaling efficiency by using active control. Two control algorithms have been tested in this study – on/off control and proportional control. The damping was adjusted by setting the damper current to different levels in order to measure the effects of the change in response of the bike. The rear suspension system has been integrated into an existing bike frame and tested on a shaker table as well as a mountain trail. Shaker table testing demonstrates the effectiveness of the damper, while the trail testing indicates that the MR damper-based shock absorber can be used to implement different control algorithms. The shaker table and trail testing results indicate that active damping control can be implemented using an MR damper. Using the results of these experimental tests, a theoretical test was simulated using a mathematical model; which was used to represent the mountain bike mounted to the shaker table. The results were plotted using transmissibility, power spectrum density, and frequency mode shape plots which indicated three applicable natural frequencies near 5, 9, and 10 Hz, when applying the mountain bike, rear suspension system, and rider weight/distribution used for this experiment. Upon the analysis using MATLAB, the mathematical model was determined to correctly represent the overall dynamics of the bicycle pertaining to the sprung mass. Additional accelerometers will need to be placed throughout the bicycle to determine if the mathematical model correctly represented the overall dynamics of the bicycle as a whole.
Book Synopsis Kinetic and Vibration Analysis of Off-road Bicycle Suspension Systems by : Morris R. Levy
Download or read book Kinetic and Vibration Analysis of Off-road Bicycle Suspension Systems written by Morris R. Levy and published by . This book was released on 2000 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the present project was to quantify and compare differences in impact performance and damping effectiveness among various off-road bicycle suspension systems. Two experiments were conducted to compare suspensions. Fork impact performance was tested by measuring peak antero-posterior braking forces and impulses during impact with bumps of 6- and 10-cm height for five mountain bike suspension systems. These results were compared to a rigid fork condition. Comparisons among suspension systems showed small but significant differences in performance. While only marginal differences in peak force were found for the suspension conditions, more substantial differences in braking impulse were observed. Air-Oil design forks had the lowest braking impulse for the range of speeds and impact characteristics of this experiment. In another setting, an analysis of acceleration signals over a range of frequencies on two surface conditions (gravel and trail) was conducted to assess the damping effectiveness of the five suspension systems. The mountain bike was equipped with accelerometers mounted at the axle and frame. A spectral analysis of the signal was performed for each signal to provide a measure of fork effectiveness. Results showed that accelerations ranged from -33 to +40 g at the axle and from -13 to +13 g at the frame, while spectral analyses of the acceleration signals revealed two distinct frequency regions from 0 to 100 Hz and from 300 to 400 Hz. The various suspension systems were all effective in attenuating vibration over the first region. Vibration amplitudes at the frame were considerably less than at the axle for the suspension conditions while similar axle-frame vibrations were observed with the rigid fork. Lower frequency vibration amplitudes were typically greater on the trail than on gravel. In the frequency region between 300-400 Hz, the signal was attenuated at the frame for all conditions including the rigid fork. The quantification and comparison process of the various suspension forks using impulse provided an objective marker for performance, and allowed differentiation between various suspension conditions. Moreover, the effectiveness analysis through the use of accelerometers provided insight into the range of frequencies dampened by a suspension. The lower frequency range dampening suggested that effectiveness of a suspension fork can be quantified even though the experiment did not conclusively differentiate between the forks.
Book Synopsis Quantification and Optimization of Off-road Bicycle Suspension Performance by : Eric L. Wang
Download or read book Quantification and Optimization of Off-road Bicycle Suspension Performance written by Eric L. Wang and published by . This book was released on 1995 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physiological and Performance Characteristics of Elite Mountain Bike Cyclists by : Kelly Linaker
Download or read book Physiological and Performance Characteristics of Elite Mountain Bike Cyclists written by Kelly Linaker and published by . This book was released on 2004 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cross-country (XC) mountain bike (MTB) riding is a new cycling discipline and research examining the physiological demands of MTB racing is limited. The purpose of this study was to comprehensively measure physiological characteristics, to identify the performance demands of XC and time trial MTB racing and to simulate a field MTB race in the laboratory to measure the physiological responses associated with racing.
Book Synopsis Verification of Hardware-in-the-loop as a Valid Testing Method for Suspension Development by : Werner Ekhard Misselhorn
Download or read book Verification of Hardware-in-the-loop as a Valid Testing Method for Suspension Development written by Werner Ekhard Misselhorn and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A need for a cost effective, versatile and easy to use suspension component testing method has arisen, following the development of a four-state hydro-pneumatic semi-active spring-damper system. A method known as hardware-in-the-loop (HiL) was investigated, in particular its use and compatibility with tests involving physical systems previously HiL was used predominantly for Electronic Control Unit (ECU) testing. The suitability of HiL in the development of advanced suspension systems and their control systems, during which various vehicle models can be used, was determined. A first step in vehicle suspension design is estimating a desired spring and damper characteristic, and verifying that characteristic using software simulation. The models used during this step are usually low-order, simple models, which hampers quick development progress. To predict vehicle response before vehicle prototype completion, many researchers have attempted to use complex and advanced damper models to simulate the vehicle's dynamics, but these models all suffer from some drawback it is either based on empirical data, giving no indication of the physical parameters of the design sought: it may be overly complex, having many parameters and thus rendering software impractical: or it may be quick but based on the premise that there is no hysteresis in the damping character. It can be seen that an obvious answer exists use a physical commercially available or prototype damper in the software simulation instead of the mathematical model. In this way the suspension deflection, i.e. the true motion of the damper is used as excitation, and the true damper force is measured using a hydraulic actuator and load cell. The vehicle mass motions are simulated in a software environment. This is basically what HiL simulation does. The HiL method was verified by comparing HiL simulations and tests to globally accepted testing methods, employing widely-used vehicle models: linear single-degree-of-freedom (SDOF) and two-degrees-of-freedom (2DOF) or quarter-car models were used. The HiL method was also compared to a non-linear physical system to verify that the method holds for real vehicle suspension geometries. This meant that HiL had to perform adequately at both ends of the suspension-testing spectrum base software and real system simulation. The comparison of the HiL and software/real system simulation was done using the Error Coefficient of Variance (ECOV) between the compared signals: this quantitative measure proved very sensitive and performed dubiously in the presence of signal offsets, phase lags and scaling errors, but remains a tangible, measurable parameter with which to compare signals. Visual confirmation was also obtained to back the ECOV values. It was found that even using a relatively low-force actuator, the HiL simulation results followed the software/real system responses well. Phase lags and DC offsets in the HiL simulation's measured signals (as well as the real systems responses) has an adverse effect on the performance of the HiL simulation. Special attention must thus be paid to the zeroing of equipment and the amount/type of filters in the system, as these affect the HiL results dramatically. In all, HiL was proven to be a versatile and easy to use alternative to conventional mass-based suspension testing.
Book Synopsis The Effects of Selected Mountain Bike Front Suspension Forks on Handlebar Vibration and Ground Reaction Forces by : Marnie Laser
Download or read book The Effects of Selected Mountain Bike Front Suspension Forks on Handlebar Vibration and Ground Reaction Forces written by Marnie Laser and published by . This book was released on 1997 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Physiology and Bioenergetics of Ultraendurance Mountain Bike Racing by : John Metcalfe
Download or read book The Physiology and Bioenergetics of Ultraendurance Mountain Bike Racing written by John Metcalfe and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultraendurance mountain bike racing is a relatively new sport and has received scant research attention. The practical difficulty of field-testing during competition has played a role in this dearth of knowledge. The purpose of this thesis was to investigate the physiology and bioenergetics of cross-country marathon (XCM) and 24 hour team relay (24XCT) mountain bike racing. Study One analysed the physiological characteristics of XCM competitors and compared them to data from studies in the literature for Olympic-distance cross-country (XCO) mountain bike competitors. The XCM participants had lower mean peak aerobic capacity (58.4 ± 6.3 mL" g-1" in-1), greater body mass (72.8 ± 6.7 kg) and estimated percentage body fat (10.4 ± 2.4%) compared to values reported for XCO competitors in the literature. Stature (1.77 ± 6.0 m) and normalised peak power output (5.5 ± 0.7 W" g-1) were comparable. These data suggest that specific physiological characteristics of XCM competitors differ from those of XCO competitors. Study Two quantified and described the exercise intensity during a XCM race by monitoring heart rate responses. The mean heart rate (150 ± 10 beats" in-1) for the duration of the race equated to 82 percent of maximum heart rate and did not differ significantly throughout the race (p = 0.33). The data indicated that the XCM race was of a high aerobic intensity. Prior to the competition the relationship between heart rate and O2peak for each participant was established during an incremental laboratory test. Energy expenditure was estimated by assigning 20.2 kJ to each litre of oxygen consumed. The mean rate of energy expenditure during the race was estimated to be 59.9 kJ" in-1. Furthermore, no anthropometric or physiological measures were correlated to race speed, indicating that other factors contribute to race performance. The third study was a laboratory-based investigation to determine whether physiological factors relevant to 24XCT racing change with time of day. On separate days participants cycled on an ergometer for 20 min at 82 percent of maximum heart rate at 06:00, 12:00, 18:00, and 00:00 h. Significant differences (p
Author :Javier Garcia de Jalon Publisher :Springer Science & Business Media ISBN 13 :1461226007 Total Pages :456 pages Book Rating :4.4/5 (612 download)
Book Synopsis Kinematic and Dynamic Simulation of Multibody Systems by : Javier Garcia de Jalon
Download or read book Kinematic and Dynamic Simulation of Multibody Systems written by Javier Garcia de Jalon and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanical engineering, an engineering discipline born of the needs of the industrial revolution, is once again asked to do its substantial share in the call for industrial renewal. The general call is urgent as we face profound issues of productivity and competitiveness that require engineering solu tions, among others. The Mechanical Engineering Series features graduate texts and research monographs intended to address the need for informa tion in contemporary areas of mechanical engineering. The series is conceived as a comprehensive one that will cover a broad range of concentrations important to mechanical engineering graduate edu cation and research. We are fortunate to have a distinguished roster of consulting editors, each an expert in one of the areas of concentration. The names of the consulting editors are listed on the front page of the volume. The areas of concentration are applied mechanics, biomechanics, computa tional mechanics, dynamic systems and control, energetics, mechanics of material, processing, thermal science, and tribology. Professor Leckie, the consulting editor for applied mechanics, and I are pleased to present this volume of the series: Kinematic and Dynamic Simulation of Multibody Systems: The Real-Time Challenge by Professors Garcia de Jal6n and Bayo. The selection of this volume underscores again the interest of the Mechanical Engineering Series to provide our readers with topical monographs as well as graduate texts. Austin Texas Frederick F. Ling v The first author dedicates this book to the memory of Prof F. Tegerizo (t 1988), who introduced him to kinematics.
Book Synopsis Mastering Mountain Bike Skills by : Brian Lopes
Download or read book Mastering Mountain Bike Skills written by Brian Lopes and published by Human Kinetics. This book was released on 2017-07-24 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: If you want to ride like a pro, you should learn from a pro! In Mastering Mountain Bike Skills, Third Edition, world-champion racer Brian Lopes and renowned riding coach Lee McCormack share their elite perspectives, real-life race stories, and their own successful techniques to help riders of all styles and levels build confidence and experience the full exhiliration of the sport. Mastering Mountain Bike Skills is the best-selling guide for all mountain biking disciplines, including enduro, pump track racing, dual slalom, downhill, cross-country, fatbiking, and 24-hour races. It absolutely captures the sport and offers everything you need to maximize performance and excitement on the trail. Learn how to select the proper bike and customize it for your unique riding style. Develop a solid skills base so you can execute techniques with more power and precision. Master the essential techniques to help you carve every corner, nail every jump, and conquer every obstacle in your path. Last, but not least, prepare yourself to handle every type of weather and trail condition that the mountain biking world throws at you. Whether you’re a recreational rider looking to rock the trails with friends, are a seasoned enthusiast, or are aspiring to be a top pro, Mastering Mountain Bike Skills will improve your ride and dust the competition. Don't just survive the trail—own the trail, and enjoy the thrill of doing it.
Book Synopsis Serious Cycling by : Edmund R. Burke
Download or read book Serious Cycling written by Edmund R. Burke and published by Human Kinetics. This book was released on 2002-02-12 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ride faster and more efficiently with Serious Cycling. Exercise scientists have unearthed a wealth of information that cyclists can use to improve their performance. However, most cyclists have never had access to this great body of knowledge. Now you do. Serious Cycling bridges the gap between scientific observation and cycling performance. It takes the latest scientific data on physiology, biomechanics, nutrition, injury prevention and recovery, and training, and translates it into practical applications that will have an immediate impact on your personal training program. Written by one of cycling's top experts, this book will help you build endurance, increase lactate threshold, and enhance cycling strength and power. Two-time U.S. Olympic team staff member Ed Burke has combined physiological training principles and real-world experiences to make Serious Cycling the reference that no elite cyclist should be without. The training methods and techniques he presents are what the top cyclists use. You'll learn how to - use power meters and heart rate monitors to gauge what is happening in your body while you work out; - prevent injuries and illness, even during periods of hard training and racing; - use proper nutrition and cutting-edge supplementation strategies to train harder and recover more effectively; - make your body and your bike work with—not against—each other, - get the best, most current information on proper positioning and cycling biomechanics; and - apply effective tactics and race strategies to ensure your success in time trials, road races, and criteriums. Whether you're a competitor, a club member, or a weekend century rider, Serious Cycling will give you the know-how—and the means to apply it—so that you can reach your full potential.
Book Synopsis Therapeutic Exercise by : Carolyn Kisner
Download or read book Therapeutic Exercise written by Carolyn Kisner and published by F.A. Davis. This book was released on 2022-10-17 with total page 3368 pages. Available in PDF, EPUB and Kindle. Book excerpt: The premier text for therapeutic exercise Here is all the guidance you need to customize interventions for individuals with movement dysfunction. You’ll find the perfect balance of theory and clinical technique—in-depth discussions of the principles of therapeutic exercise and manual therapy and the most up-to-date exercise and management guidelines.
Book Synopsis Handbook of Sports Medicine and Science, The Paralympic Athlete by : Yves Vanlandewijck
Download or read book Handbook of Sports Medicine and Science, The Paralympic Athlete written by Yves Vanlandewijck and published by Wiley-Blackwell. This book was released on 2011-01-31 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This brand new Handbook addresses Paralympic sports and athletes, providing practical information on the medical issues, biological factors in the performance of the sports and physical conditioning. The book begins with a comprehensive introduction of the Paralympic athlete, followed by discipline-specific reviews from leading authorities in disability sport science, each covering the biomechanics, physiology, medicine, philosophy, sociology and psychology of the discipline. The Paralympic Athlete also addresses recent assessment and training tools to enhance the performance of athletes, particularly useful for trainers and coaches, and examples of best practice on athletes' scientific counseling are also presented. This new title sits in a series of specialist reference volumes, ideal for the use of professionals working directly with competitive athletes.
Book Synopsis ABC of Prehospital Emergency Medicine by : Tim Nutbeam
Download or read book ABC of Prehospital Emergency Medicine written by Tim Nutbeam and published by John Wiley & Sons. This book was released on 2023-05-15 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the newly revised second edition of ABC of Prehospital Emergency Medicine, a team of experienced prehospital practitioners deliver a comprehensive up-to-date guide to the rapidly evolving field of prehospital emergency medicine. The book includes evidence-based practice and expert opinion to meet the needs of the PHEM training curriculum covering operational, clinical and system considerations. An international team of expert editors and contributors have also provided readers with: A thorough introduction to prehospital emergency medicine, including activation and deployment, personal protective equipment, and scene safety and assessment Comprehensive exploration of the primary survey, airway, breathing, and circulation assessments Practical discussions of prehospital anesthesia, analgesia, sedation, monitoring and ultrasound The prehospital management of medical, trauma and psychiatric emergencies How to care for special groups, including the elderly, obstetric, pediatric, and bariatric patients Considerations in mass casualty and chemical, biological, radiation, and nuclear incidents. ABC of Prehospital Emergency Medicine is essential reading for paramedics, doctors, nurses and other prehospital practitioners. The text is ideal for those undertaking subspecialty PHEM training, those studying for postgraduate prehospital degree modules, or practitioners undertaking PHEM exams.
Book Synopsis The Social Construction of Technological Systems by : Wiebe E. Bijker
Download or read book The Social Construction of Technological Systems written by Wiebe E. Bijker and published by MIT Press. This book was released on 1989 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The impact of technology on society is clear and unmistakeable. The influence of society on technology is more subtle. The 13 essays in this book have been written by a diverse group of scholars united by a common interest in creating a new field - the sociology of technology. They draw on a wide array of case studies - from cooking stoves to missile systems, from 15th-century Portugal to today's Al labs - to outline an original research program based on a synthesis of ideas from the social studies of science and the history of technology. Together they affirm the need for a study of technology that gives equal weight to technical, social, economic, and political questions"--Back cover.
Book Synopsis Bicycling Science by : Frank Rowland Whitt
Download or read book Bicycling Science written by Frank Rowland Whitt and published by MIT Press (MA). This book was released on 1982 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The bicycle is almost unique among human-powered machines in that it uses human muscles in a near-optimum way. This new edition of the bible of bicycle builders and bicyclists provides just about everything you could want to know about the history of bicycles, how human beings propel them, what makes them go faster, and what keeps them from going even faster. The scientific and engineering information is of interest not only to designers and builders of bicycles and other human-powered vehicles but also to competitive cyclists, bicycle commuters, and recreational cyclists. The third edition begins with a brief history of bicycles and bicycling that demolishes many widespread myths. This edition includes information on recent experiments and achievements in human-powered transportation, including the "ultimate human- powered vehicle," in which a supine rider in a streamlined enclosure steers by looking at a television screen connected to a small camera in the nose, reaching speeds of around 80 miles per hour. It contains completely new chapters on aerodynamics, unusual human-powered machines for use on land and in water and air, human physiology, and the future of bicycling. This edition also provides updated information on rolling drag, transmission of power from rider to wheels, braking, heat management, steering and stability, power and speed, and materials. It contains many new illustrations.
