Wrist Angle Paper Experiment Comparison

[dymnz]

After #44, see table 'paper_sel.xlsx'

• 4-ch sEMG w/ random placement. Try to achieve comparable performance.
• Compare separate FLX/EXT w/ most paper
• Compare separate PRO/SUP w/ paper 7 & 10 on table
  • 7: Bayesian Filtering of Surface EMG for Accurate Simultaneous and Proportional Prosthetic Control (2014)
  • 10: Continuous Estimation of Wrist Angles for Proportional Control Based on Surface Electromyography (2016)

Note

• No need for Magn/Pot. angle groudtruth in this case, since FLX/EXT won't happen w/ PRO/SUP

  • 45

• Separating FLX/EXT and PRO/SUP means that 4-ch sEMG is redundant since 2-ch sEMG is enough to capture the muscle activity of PRO/SUP and FLX/EXT separately
  • What is the rationale behind using 4-ch sEMG v.s. 2-ch sEMG when measuring separate FLX/EXT and PRO/SUP?
  • Accuray
    • Why stop at 4-ch then?

TODO

• [x] Decide procedure

[dymnz]

Electrode location

• Equal distance placement w/ 4-ch sEMG
• Forming a ring around the thickest part of the forearm (~4.5cm from elbow)
  • Circumference 27.5cm, divided by 4 --> 6.9cm lateral inter-electrode distance
  • Placing clockwise, labelled 1-4
• Exact placement
  • Baseline test: Ring starting from the top of the forearm w/ palm facing down
  • "Random" test: Ring starting from the top of the forearm w/ palm facing down, then rotate 45d
• Reference electrode placed near the bony area near wrist

[dymnz]

Recording

• Separate PRO/SUP/FLX/EXT
• 5 iteration in each session w/ 3 session
• Segments are separated in post-processing
• For nICA

  • FLX/EXT/PRO/SUP, 1iter. each in 1 session (3 session in total)

Cross-validation

• Segments from different sessions are mixed
• 4-1 cross validation (12-3 in this case)
• Separate FLX/EXT and PRO/SUP training for now (1, 3)