Summary: | 碩士 === 國立臺北科技大學 === 車輛工程系所 === 99 === Riding comfort, an important issue in vehicle design, depends on performance of suspension is excellent or not. Wheel-hub motor vehicles have gradually been noticed because of the rise of environmental consciousness in recent years. Wheel-hub motor vehicle is the vehicle that installs the energy source-motor in the wheel. Even though this design can increase the power transmission efficiency, it makes riding comfort poorer because the unsprung mass is overweight. For improving this negative effect, this research used the vibration absorber to absorb the wheel vibration. Vibration absorbers can be an extra mass or be wheel-hub motor itself, besides, absorbers can also be used in traditional suspension to improve the riding comfort of vehicles. This thesis constructs a 3 d.o.f. quarter car math model which includes car body, wheel and vibration absorber to analyze the restrain effect of body vibration by using vibration optimization theory, and evaluate the effect of random road input on vehicle frequency response index and human body weighted acceleration R.M.S value. The conclusion of this thesis can give suggestions for application of vibration absorber on vehicle suspension in the future.
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