Featured Research

from universities, journals, and other organizations

Auto Gear-Change Bicycle: Computer Controlled Bicycle Gear Changes Optimize Power, Comfort

Date:
January 14, 2009
Source:
Inderscience Publishers
Summary:
Researchers in Taiwan are designing a computer for pedal cyclists that tells them when to change gear to optimize the power they develop while maintaining comfort.

Researchers in Taiwan are designing a computer for pedal cyclists that tells them when to change gear to optimize the power they develop while maintaining comfort.

Related Articles


As environmental pressures mount to find greener modes of transport, more and more people are turning to bicycling not only as an enjoyable form of exercise but also as their main mode of transport for commuting. But, athletes aside, few people know how to adjust the gears on their bicycle to get the most power out of their pedaling without becoming uncomfortable either through having to pedal too fast in a low gear on level roads or straining when going up hill or to maintain a high speed.

T.Y. Lin, Y.C. Chen, and H.C. Ping at the Department of Mechanical Engineering, at National Defense University, Tashi, Taiwan, ROC, explain how ergonomic studies show that cyclists can be in an optimum state during cycling with a fixed output power and cadence (pedaling speed). They have now developed a computer algorithm that gives any cyclist a gear shift strategy to cope with almost any cycling conditions and maintain this optimal state without reducing comfort.

The researchers point out that bicycles are a nineteenth century invention but there has been little fundamental change in the bicycle's components in the last 75 years or. Indeed, good derailleur gearing systems allow riders to move efficiently and feel comfortable but not necessarily optimally so for the untrained cyclist. Nevertheless, the derailleur gear system can fine-tune the relationship between the cyclist's leg strength, their cardiovascular system, and the riding environment.

Efforts to improve bicycles have tended to focus on modifying components and ignored the fact that seated in every saddle is a human being. Lin and colleagues have factored in the human element of cycling and considered that a fit and healthy non-athlete should be able to ride a bicycle for several hours generating 75 Watts of power without suffering fatigue and at a comfortable cadence of between 60 and 100 revolutions per minute.

The algorithm devised by the team and tested by simulation of a 12-speed bicycle provides a gear-shifting sequence with minimal power losses and gear shifts. "By following the sequence, riders can operate the derailleur system more easily," says the team, "Riders will also feel comfortable because all gear-ratios can be used, and gear-shifting actions will be smoother." The computer will automatically adjust to riding conditions, satisfying the human element. It would not be hard to imagine extending the concept to entirely automatic mechanical gear-changing system.


Story Source:

The above story is based on materials provided by Inderscience Publishers. Note: Materials may be edited for content and length.


Journal Reference:

  1. Lin et al. Development of an optimum bicycle shifting strategy based on human factors modelling. International Journal of Human Factors Modelling and Simulation, 2008; 1 (2): 159 DOI: 10.1504/IJHFMS.2008.022474

Cite This Page:

Inderscience Publishers. "Auto Gear-Change Bicycle: Computer Controlled Bicycle Gear Changes Optimize Power, Comfort." ScienceDaily. ScienceDaily, 14 January 2009. <www.sciencedaily.com/releases/2009/01/090113101116.htm>.
Inderscience Publishers. (2009, January 14). Auto Gear-Change Bicycle: Computer Controlled Bicycle Gear Changes Optimize Power, Comfort. ScienceDaily. Retrieved November 28, 2014 from www.sciencedaily.com/releases/2009/01/090113101116.htm
Inderscience Publishers. "Auto Gear-Change Bicycle: Computer Controlled Bicycle Gear Changes Optimize Power, Comfort." ScienceDaily. www.sciencedaily.com/releases/2009/01/090113101116.htm (accessed November 28, 2014).

Share This


More From ScienceDaily



More Computers & Math News

Friday, November 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

EU Pushes Google For Worldwide Right To Be Forgotten

EU Pushes Google For Worldwide Right To Be Forgotten

Newsy (Nov. 27, 2014) Privacy regulators recommend Google expand its requested removals to apply to all its web domains. Video provided by Newsy
Powered by NewsLook.com
Predictions Of Tablets' Demise Sound Familiar

Predictions Of Tablets' Demise Sound Familiar

Newsy (Nov. 26, 2014) The tablet's days are numbered, at least according to a recent IDC report. The market-research firm paints a grim outlook for tablets. Video provided by Newsy
Powered by NewsLook.com
Today's Prostheses Are More Capable Than Ever

Today's Prostheses Are More Capable Than Ever

Newsy (Nov. 26, 2014) Advances in prosthetics are making replacement body parts stronger and more lifelike than they’ve ever been. Video provided by Newsy
Powered by NewsLook.com
FCC Forces T-Mobile To Alert Customers Of Data Throttling

FCC Forces T-Mobile To Alert Customers Of Data Throttling

Newsy (Nov. 25, 2014) T-Mobile and the FCC have reached an agreement requiring the company to alert customers when it throttles their data speeds. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins