Study of circular cross correlation and phase lag to estimate knee angle: an application to prosthesis
by Deepak Joshi, Sneh Anand
International Journal of Biomechatronics and Biomedical Robotics (IJBBR), Vol. 1, No. 2, 2010

Abstract: This paper present an application of cross correlation coefficient (CCC) to predict knee angle and propose a novel method to design unilateral transfemoral prosthesis. The phase lag at which peak CCC occurs is used to predict knee angle. Sixteen healthy subjects were required to walk in movement analysis lab. Circular cross correlation was preferred as the knee angle time series is periodic while walking. An error profile was generated to assess the suitability of this technique. One sampled t-test shows the mean error of 4.9° to 7.9° with 95% confidence interval. Thus, phase lag algorithm has the potential to be implemented in hardware to design adaptive unilateral transfemoral prosthesis.

Online publication date: Thu, 06-May-2010

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Biomechatronics and Biomedical Robotics (IJBBR):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com