Fuzzy Control Design for the Semi-Active Suspension of Vehicle 鄭佳玟、林志哲
E-mail: [email protected]
ABSTRACT
The main purpose in this thesis is to design a fuzzy controller for the semi-active suspension to achieve ride comfort and handling safety at the same time. The full-car model is defined by CarSim and the fuzzy controller is implemented by MATLAB Simulink.
Comparing from the passive suspension and traditional semi-active suspensions in different road profiles, the fuzzy controller has better performance in ride comfort and handling safety. In addition, a window-root-mean-square value is proposed to measure the ride comfort and it can represent the actual comfort more instantly than the past continuous-root-mean-square value. Using the road profiles with different wavelengths and constant amplitudes, turning around in ring-type smooth road, and lane change drive mode etc to test these controllers, the proposed fuzzy controller can achieve ride comfort and handling safety at the same time.
Keywords : adjustable shock absorber ; semi-active suspension ; comfort ; safety ; CarSim ; RMS Table of Contents
封面內頁 簽名頁 授權書 ...iii 中文摘要 ...iv 英文摘要 ...v 誌謝 ...vi 目錄 ...vii 圖目錄 ...ix 表目錄 ...xii 符號說明 ...xv 第 一章 緒論 ...1 1.1 前言 ...1 1.2 研究動機與本文架構 ....2 1.3 文獻回顧 ...3 第二章 汽車之懸吊 系統介紹 ...6 2.1 車輛座標定義 ...6 2.2 懸吊系統組成元件 ...8 2.3 懸吊系統 分類 ...10 2.3.1 依連桿形式分類 ...10 2.3.2 依性能分類 ...12 第三章 被 動式懸吊全車模型之建立與分析 ...15 3.1 全車模型之懸吊系統的數學模型 ...16 3.2 CarSim軟體介紹與全車 模型建立 ...21 3.2.1 CarSim之介紹 ...21 3.2.2 被動式懸吊系統之建立 ...22 3.2.3 半 主動式懸吊系統之建立 ...25 3.2.4 全車模型之建立 ...27 3.2.5 測試路面之建立
...31 3.3 懸吊系統全車模型的模擬分析 ...33 3.3.1 全車模型之性能指標定義 ...33 3.3.2 懸吊系統之舒適性能分析 ...36 3.3.3 懸吊系統之安全性能分析 ...49 第四章 半主動式懸吊系統之 模糊控制器設計 ...63 4.1 半主動式懸吊系統之模糊控制器設計 ...65 4.1.1 定義輸入輸出變數 ...65 4.1.2 車身垂直加速度取樣方式探討 ...66 4.1.3 模糊控制器規則之設計 ...72 4.2 半主動式懸吊系統之 模糊控制器舒適性能分析 ...76 4.2.1 混合波長路面之舒適性能分析 ...76 4.2.2 車速切換控制之舒適性能分析 ...83 4.2.3 變換振幅路面之舒適性能分析 ...87 4.3 半主動式懸吊系統模糊控制器之安全性能分析 ...93 4.3.1 車道變換之安全性模擬與分析 ...94 4.3.2 環形平坦路面之安全性模擬與分析 ...97 第五章 結論與未 來展望 ...101 5.1 結論 ...101 5.2 未來展望 ...102 參考文獻
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