Ergonomics

ERGO= WORK :NORM= RULES

• It is also known as Human Engineering.

• Deals with the relationship between human+machine+environment.

• MAN+MACHINE relationship= anatomy(human and animal study), physiology(strength speed body dimensions etc.,) and psychology (how the operator behaves with respect to command etc.,)

Anthropology

• Study of human characters like height, weight, ratio of leg to shoulder length etc.,

• Usually anthropometric is a method of finding the mean of all the characteristics of human.

• Why it is needed??– To fix the boundary condition of work place– Height and shape of the seats and work tables– Design and location of handling levers and dashboard

panels knob etc.– Increased comfort leads to improved efficiency.

Driver seat dimension

seat design to meet H-point test, safety test, and comfort tests at the beginning of vehicle development.

Seating positions – detailed view

Reach ergonomics

Foot control ergonomics

Why suspension seat are necessary??• 1.7 Hz- recommended frequency, but most of

the heavy duty trucks may produce 4 Hz.• To reduce this suspension seats are came in to

effect.– hydraulic damper suspension– pneumatic damper suspension

Experimental set up

Laboratory set-up for testing the suspension seat.

INTERIOR ERGONOMICS

• Gear shifting lever.• Instrumental panel switch (reach distance).• Power window switch and door inside handler.• Front view angle and rear view angle.• Head room.• Leg room.• Steering horizantal & vertical distance.