کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5032841 | 1369999 | 2016 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A novel method of using accelerometry for upper limb FES control A novel method of using accelerometry for upper limb FES control](/preview/png/5032841.png)
- A novel method for using accelerometry for upper limb FES control is proposed.
- Method avoids the poor sensitivity at certain angles seen in existing methods.
- New method performed well in representative testing with stroke participants.
This paper reports on a novel approach to using a 3-axis accelerometer to capture body segment angle for upper limb functional electrical stimulation (FES) control. The approach calculates the angle between the accelerometer x-axis and the gravity vector, while avoiding poor sensitivity at certain angles and minimizing errors when true acceleration is relatively large in comparison to gravity. This approach was incorporated into a state-machine controller which is used for the real-time control of FES during upper limb functional task performance. An experimental approach was used to validate the new method. Two participants with different upper limb impairments resulting from a stroke carried out four different FES-assisted tasks. Comparisons were made between angle calculated from arm-mounted accelerometer data using our algorithm and angle calculated from limb-mounted reflective marker data. After removal of coordinate misalignment error, mean error across tasks and subjects ranged between 1.4 and 2.9°. The approach shows promise for use in the control of upper limb FES and other human movement applications where true acceleration is relatively small in comparison with gravity.
Journal: Medical Engineering & Physics - Volume 38, Issue 11, November 2016, Pages 1244-1250