IE_Lecture05-ed

IE_Lecture05-ed - Lecture 5 Industrial Ergonomics (ENGR...

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Lecture 5 Industrial Ergonomics (ENGR 3460U) Manual work Design usculoskeletal Musculoskeletal structor: Dr Ahmad Barari Instructor: Dr. Ahmad Barari Barari- ENGR 3460U 1
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ORCE- ELOCITY RELATIONSHIP FORCE VELOCITY RELATIONSHIP • The faster molecular bonds are formed, broken or reformed, the ss effective bonding less effective bonding ax muscle force with Max muscle force with slow motion • Force-velocity relationship Barari- ENGR 3460U 2
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ORCE- ELOCITY RELATIONSHIP FORCE VELOCITY RELATIONSHIP • Use momentum to assist work • Upward and downward otions- inimize motions Minimize fighting gravity • Isotonic contraction – ynamic strength dynamic strength measurement • Isokinetic – constant velocity measurement ometric- tatic strength Barari- ENGR 3460U 3 Isometric static strength
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PTIMIZE HUMAN STRENGTH OPTIMIZE HUMAN STRENGTH • 443 males, 108 females se optimum Use optimum postures • Use large muscles for power (87 psi strength) •D e s i gn tasks so that most can do! • Psychophsical trength Barari- ENGR 3460U 4 strength
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Muscle Strength moment data Barari- ENGR 3460U 5
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Barari- ENGR 3460U 6
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Barari- ENGR 3460U 7
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• Psychophsical strength Barari- ENGR 3460U 8
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• Psychophsical strength Barari- ENGR 3460U 9
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• Psychophsical strength Barari- ENGR 3460U 10
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IE_Lecture05-ed - Lecture 5 Industrial Ergonomics (ENGR...

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