- 學位論文
輪胎變形量回授對主動式懸吊系統控制性能之影響
The influence of tire deformation feedback on vehicle active suspension control system
摘要
本文主旨是探討輪胎變形量自回授訊號中移除後對於主動式懸吊系統之乘坐舒適性及操控安全性之影響，比較FSMC及FLC兩種控制器的控制效能，為了探討各種回授信號對主動式懸吊系統之控制性能影響性，本研究採用了光學尺位置回授與加速度規加速度回授兩種不同的回授方法，並且考慮到輪胎變形量由回授訊號中移除對車輛懸吊系統的影響，以及採用不同回授方法對系統性能的影響，考慮到實用性；本研究亦嘗試以加速度規做為回授訊號之唯一來源，導入Jeanway舒適性準則；以之做比較驗證。主動式懸吊系統為動態時變且高度非線性系統，所以本文採用無需數學模式的智慧型控制理論。本文將採用兩種智慧型控制器應用於主動式懸吊系統：(一)、傳統模糊控制器、（二）、滑動模式模糊控制器，然後再比較兩者控制器遇到不同路面與車速下之車體垂直加速度、車體位移、功率頻譜密度等，並分析輪胎變形量變化對於主動式懸吊系統所造成之影響，並對實驗結果作更進一步的討論。最後，以本實驗室建立之1/4車之液壓伺服主動式懸吊系統實驗機台之實驗結果分析驗證之。
並列摘要
In the thesis, control strategy are adopted position feedback and acceleration feedback.This research is to study the tire deformation feedback control research for active suspension system. The contents are the way to improve the riding ability and comfortability of the vehicle. The active suspension system is a nonlinearandtime varying system. It is very hard to describe precisely in mathematics,,so this paper proposed intelligent control theorem model free based to describe the system reality. This research are adopted two kind of intelligent controllers (1).Fuzzy logic controller (2).Fuzzy sliding mode controller for active suspension system, and then make contrasts theirs performances under the different road profile. Further, to obtain the influence of tire deformation of active suspension system, verify the experimental results by a 1/4 car active suspension system was constructed in our lab.