Materials Research Society of Korea Mechatronics Laboratory

Geongsang National University Moon Won Ki

Performance appraisal of the truck where leaf spring and the independent suspension system is affixed

Optimization of Dynamic Characteristics of Heavy Truck

Materials Research Society of Korea Mechatronics Laboratory

Geongsang National University Moon Won Ki

Topic Overview

• What is Independent Suspension system?

• Why Independent suspension system?

• strength and weakness

• Example

• Goals

• ADAMS

Materials Research Society of Korea Mechatronics Laboratory

Geongsang National University Moon Won Ki

What is Independent Suspension system?

• The type where each wheel of the automobile is affixed independently in the frame

Macpherson Wishbone

Materials Research Society of Korea Mechatronics Laboratory

Geongsang National University Moon Won Ki

Rigid axle and independent suspension axle comparison

Independent suspension axle○ expensive○ Structure is complicate ○ It is suitable with special use

Rigid axle○ cheep○ It operates a pavement○ Non-packing, rough road and special objective incongruence

Materials Research Society of Korea Mechatronics Laboratory

Geongsang National University Moon Won Ki

Strength and Weakness

• It is used plentifully in the passenger car, the light truck and the mini van

• Strength– The stability of the car is improves because the center of car doing lowly.

– Lower part weight of the spring is light, so smooth ride

– The vibration which to the steering wheel shakes with side direction (Shimmy) does not happen well.

– The Tire and road surface ground connection characteristic get better.

• Weakness– There are many connecting portion, so structure is complicated, by these

attrition the wheel alignment changes.

– When traveling, the tire is quickly worn away because Tread and Wheel Alignment are changed by the wheel moves up and down

Materials Research Society of Korea Mechatronics Laboratory

Geongsang National University Moon Won Ki

Example

Materials Research Society of Korea Mechatronics Laboratory

Geongsang National University Moon Won Ki

Goals

• Modeling and Dynamic analysis of using ADAMS (Automatic Dynamic Analysis of Mechanical Systems)

• It shows the efficien cy the truck which installs independent suspension system better than the truck which affixes leaf spring from dynamic test in mountain terrain

Materials Research Society of Korea Mechatronics Laboratory

Geongsang National University Moon Won Ki

ADAMS

Leaf spring

Materials Research Society of Korea Mechatronics Laboratory

Geongsang National University Moon Won Ki

ADAMS

ADAMS modeling of the front chassis suspension & steering system

Materials Research Society of Korea Mechatronics Laboratory

Geongsang National University Moon Won Ki

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