【正文】 grams。 The parison of different control schemes to determine the logic threshold control method as the control program, and use a bination of acceleration and slip rate as the control parameter. Threshold used to calculate the event the wheel speed. By parison study is designed according to the ABS control school system. Theoretically achieve the ABS control functions to plete the design requirements. In the design process for automotive brake system with brake theory and deeper understanding and expand their knowledge, their problemsolving ability has been improved. Key words: Antilock braking system Electronic control unit Slip ratio threshold Wheel Speed Sensor Hydraulic control system 目 錄 摘 要 ........................................................................................................................................ I Abstract ....................................................................................................................................... II 第 1 章緒論 ................................................................................................................................... 1 課題背景 ......................................................................................................................... 1 ABS 防抱死控制系統(tǒng)的發(fā)展歷史及發(fā)展趨勢 ............................................................ 1 ABS 系統(tǒng)發(fā)展概況 ................................................................................................ 1 ABS 系統(tǒng)發(fā)展趨勢 .............................................................................................. 3 國內 ABS 系統(tǒng)研究的理論狀態(tài)和具有代表的 ABS 產品公司 ....................... 4 本文主要研究任務 ......................................................................................................... 5 第 2 章 防抱死制動系統(tǒng)基本原理 ............................................................................................. 6 汽車制動時的運動 ......................................................................................................... 6 制動時汽車受力分析 ........................................................................................... 6 滑移率定義 ........................................................................................................... 8 滑移率與附著系數(shù)的關系 ................................................................................... 8 汽車車輪抱死時運動情況 ........................................................................................... 10 制動時車輪運動方程 ................................................................................................... 11 采用防抱死制動系統(tǒng)的必要性 ................................................................................... 12 防抱死制動系統(tǒng)基本工作原理 ................................................................................... 13 第 3 章 速騰汽車 ABS 系統(tǒng)的硬件設計 ................................................................................. 16 防抱死制動系統(tǒng)的基本組成 ....................................................................................... 16 防抱死制動系統(tǒng)的布置形式 ....................................................................................... 18 防抱死制動系統(tǒng)輪速傳感器選擇 ............................................................................... 20 輪速傳感器的分類 ............................................................................................. 20 霍爾式傳感器的設計 ......................................................................................... 21 電子控制單元設計 ....................................................................................................... 22 80C196KC 最 小系統(tǒng) 簡介 .................................................................................. 23 時鐘電路和復位電路設計 ................................................................................. 25 EPROM 和 RAM 的擴展 ................................................................................... 26 ABS 液壓調節(jié)系統(tǒng)設計 .............................................................................................. 27 電源設計 ....................................................................................................................... 28 信號輸入電路設計 ....................................................................................................... 29 電磁閥驅動電路 ........................................................................................................... 30 泵電機驅動電路的設計 ............................................................................................... 32 ABS 系統(tǒng)報警 LED 燈設計 ...................................................................................... 33 故障診斷硬件電路設計 ............................................................................................. 34 硬件抗干擾設計 ......................................................................................................... 35 第 4 章 速騰汽車 ABS 系統(tǒng)的軟件設計 ................................................................................. 36 控制方案和控制參數(shù)的選取 ....................................................................................... 37 控制參數(shù)及其計算 ....................................................................................................... 38 門限角減速度的求取 ......................................................................................... 38 門限角加速度的求取 ......................................................................................... 39 路面識別技術 ..................................................................................................... 39 車身參考速度的確定 ......................................................................................... 40 程序設計 ....................................................................................................................... 41 第 5 章 結論與展望 ................................................................................................................... 43 研究工作總結 ....................................................................................