My Class

1

IE 552 Mechanics of Musculoskeletal System Dr.
Andris Freivalds Class 36
2
Task Force (T) vsPerceived Force (P)
3
PSU CTD Risk Index
r2 0.52
4
(No Transcript)
5
PSU CTD Risk Index - 3

• Also a paper and pencil version
• Quicker, simpler to use for industry
• Validated with PC version
• On 12 sewing jobs
• Significant (p lt 0.001) correlation of scores
  with r2 0.66
• Action level 1.0 (similar to NIOSH Lifting)

6
(No Transcript)
7
PSU CTD Risk Index P/P 1
8
PSU CTD Risk Index P/P 2
9
PSU CTD Risk Index P/P 3
10
Videoclip Analyses

• Study videoclips
• Analyze using
• Strain Index
• PSU CTD Risk Index paper
• PSU CTD Risk Index PC
• Compare, discuss

11
(No Transcript)
12
(No Transcript)
13
(No Transcript)
14
(No Transcript)
15
(No Transcript)
16
(No Transcript)
17
(No Transcript)
18
Summary
Type of WRMSD Risk Analysis Range Action Level Stitch
Strain Index 0.1-1053 5 20
CTD Risk Index P/P 0 - 4 1.0 1.46
CTD Risk Index - PC 0 300? IR? 12.8
19
OCRA and HAL

• OCRA exposure index complicated
• HAL TLV for hand activity level

20
Comparison of Various Tools
Tool Equip Posture Force Freq Learn Time Anal Time T/RT r Valid r
OWAS P/P Sh3 3 time Short Short 0.74-0.99 -
RULA P/P S5, El3 W3 4 2 Med Short - -
HAL P/P - 10 10 V.short V.short - -
SI P/P 5 5 5 Med Short - 86se 79sp
PSUCTD P/P 2-4 Cont Cont Short Med - r20.66
PSUCTD PC SEW5-7 Cont Cont Long Long 0.72 r20.52