Measuring the Dynamic Structural Load of an Off-Road Bicycle Frame

Champoux, Yvan; Vittecoq, P.; Maltais, P.; Auger, E.; Gauthier, Benoît

doi:10.1111/j.1747-1567.2004.tb00161.x

Cited by 13 publications

(10 citation statements)

References 8 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These standards mainly serve as guidelines for the measurement and analysis of vibration levels transmitted to humans. More recently, vibration transmitted to humans has been the subject of several studies in sports including ice hockey [3], baseball [4], golf [5] and bicycling [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. In road cycling specifically, ride quality has become one of the most sought-after characteristics of a road bicycle by customers as well as by bicycle manufacturers.…”

Section: Introductionmentioning

confidence: 99%

“…Over the past three decades, the bicycle/cyclist system has been the object of several studies which can be classified according to the following four categories: (1) Transducer development and measurement of loads transmitted at the contact points between the cyclist and the bicycle (Alvarez and Vinyolas [6], Rowe et al [7], Reiser et al [8], Drouet et al [9], Bolourchi and Hull [10], De Lorenzo and Hull [11], Drouet and Champoux [12,13], Caya et al [14] Champoux et al [15], Arpinar-Avsar et al [16] and Chiementin et al [17]); (2) Road-induced excitation measurement and replication in the laboratory (Lépine et al [18]); (3) Vibration transmissibility of the bicycle and its components, and ride comfort (Petrone and Giubilato [19], Olieman et al [20], Giubilato and Petrone [21], Lépine et al [22], Thite et al [23]); (4) Model development (Perrier et al [24,25]). From a mechanical engineering standpoint, the aforementioned published literature sheds light on the inherent complexity of the study of the bicycle/cyclist system, and by extension, of the vibrational behaviour of this system.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Road bike comfort: on the measurement of vibrations induced to cyclist

2013

View full text Add to dashboard Cite

With ride quality being one of the most sought-after characteristics of a road bicycle by customers as well as by bicycle manufacturers, the vibrational behaviour of the bicycle/cyclist system has grown into an active field in sport engineering research in recent years. When assessing this behaviour, bicycle transmissibility and ride comfort, controlling test conditions to obtain repeatable load and acceleration measurements at the cyclist's contact points with the bicycle cannot be overemphasized. Surprisingly however, this consideration has not yet been specifically addressed in the literature. The aim of this paper is a first effort to investigate the effect of a selected set of test conditions on the measurement of vibration induced to the cyclist by a road bicycle. Our results showed that all the test conditions selected had a significant effect on the level of vibration induced to the cyclist.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Road bike comfort: on the measurement of vibrations induced to cyclist

2013

View full text Add to dashboard Cite

show abstract

“…These transducers measure loads at the contact interface between the cyclist and the bicycle [1][2][3][4][5][6]. They also enable us to assess a metric to quantify VIB with the ultimate goal of reducing it.…”

Section: Introductionmentioning

confidence: 99%

The relative contribution of road bicycle components on vibration induced to the cyclist

2014

View full text Add to dashboard Cite

Improving comfort in road bicycle design is a paramount concern for cyclists, who are affected by the vibrations caused by constant contact with the road surface. The cycling community has deployed many efforts in the attempt to understand and improve bicycle comfort. However, these attempts have been focused on specific components such as the fork, frame and wheels without knowing their relative influence on vibration induced to the bicyclist (VIB). The objective of this paper is to assess the relative contribution of bicycle components on the VIB at the cyclist's hands and buttocks. A factorial design test comparing the VIB in acceleration, force and power of different bicycle components has already shown that the handlebar and fork are the preponderant components for the VIB measured at the cyclist's hands. At the buttocks, the preponderant components are the wheels and frame.

show abstract

“…Performance features measured in a laboratory include adding strain gauges to the handlebars to measure the force exerted by the arms reported by Champoux et al(2004) or measurement of force at the saddle using pressure pads detailed by Potter et al(2008). Turbo trainers, rollers and treadmills require the cyclist to use their own bike to perform tests, whereas a cycle ergometer has to be fitted to each individual.…”

Section: Introductionmentioning

confidence: 99%

Model based Automated Cycling Ergometer

Chakravorti

Lugo

Philpott

et al. 2014

Procedia Engineering

View full text Add to dashboard Cite

Laboratory testing of cyclists is currently undertaken using turbo trainers or cycle ergometers. The benefits of laboratory testing are the ability to measure performance: (i) more accurately and repeatedly and (ii) under controlled conditions enabling, for example, video analysis to determine joint-specific power production or enable novel instrumentation to be applied to the bicycle, for example, to measure seat interface pressure. Influence of the bicycle fit on torque production have been presented by Irriberri et al (2008) and Peveler et al(2007). Market leading bicycle ergometer manufacturers, such as Lode and Monark, provide feedback on performance metrics including cadence and force measurement. However, neither ergometer provides real time adaptation of bicycle fit to the resolution (i.e. < mm precision) required by elite athletes or allows adjustments to position whilst cycling under simulated road / track conditions. The objective of the research presented in this paper is to demonstrate and provide initial validation results for a novel, fully automated cycle ergometer that incorporates faster, repeatable and more accurate adjustments to bicycle geometry. The ergometer also allows the cyclist to use their preferred handlebars and saddle to accommodate the different cycling disciplines, e.g. track, road, mountain and BMX. The ergometer enables fitting adjustments to be controlled whilst cycling and aims to reduce initial set-up times for different athletes to about 30 seconds as opposed to 30 minutes (required by the end-users current ergometer instantiations). Instrumented cranks have been fitted to monitor the torque and force generated by the crank movements in 2-axes through 360 degrees of crank motion. The ergometer can be coupled (via a user selectable clutch mechanism) to an AC servo motor within the drive chain which supports the application of models of bicycle performance to the ergometer to enable torque versus position versus speed profiles as derived from road and / or track trials to be readily mapped into the laboratory environment

show abstract

Measuring the Dynamic Structural Load of an Off-Road Bicycle Frame

Cited by 13 publications

References 8 publications

Road bike comfort: on the measurement of vibrations induced to cyclist

Road bike comfort: on the measurement of vibrations induced to cyclist

The relative contribution of road bicycle components on vibration induced to the cyclist

Model based Automated Cycling Ergometer

Contact Info

Product

Resources

About