Study on the Steady-State Cornering Behaviors of TTW's

• Main Authors: RUEI-FU WANG, 王瑞福
• Other Authors: Mau-Pin Hsu
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/3253m7

碩士 === 國立臺灣科技大學 === 機械工程系 === 100 === This research team has previously developed two kinds of tilting three-wheelers, namely, 1F/2R and 2F/1R. After improvements on the tilting mechanism, the 1F/2R has achieved the same riding sensation as any two-wheeled vehicles. As for the 2F/1R, the problem of unable to return to the upright position after tilting at low-speed cornering was corrected. However, without computer simulation, we were unable to predict the cornering characteristics of both vehicle models based on the front/rear tire sideslip angles. Following the previous research, this study, using the LMS VL-Motion softwar, aimed at why these two vehicle models would act differently in their cornering behaviors. The results of this study successfully solved the puzzle why previously we could not predict the cornering characteristics of any type of TTW’s, based on the slip angles of front and rear tires. Since the tilting of vehicle body of a TTW would change the kinematic steering angle, both the roll angle and slip angle must be considered in correctly predicting a TTW’s cornering characteristics. Calculations from analytical equation and simulation results agreed with each other and confirmed this speculation. In addition, more simulation analysis was made on the full-body-tilting model and partial-body-tilting models of the 1F/2R type. The results showed that the rollover resistance and the slip-away speed of partial-body-tilting models were not as good as the full-body-tilting models. To improve this condition, one should increase the payload of the front tire and make the rear wheels tilt at turns.