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摘 要
ABS系統(tǒng)可以顯著提高或改善汽車緊急制動時的操控性和穩(wěn)定性，縮短了制動距離，是一種新型的汽車電子控制產(chǎn)品，并得到了越來越廣泛的應用。
本文以轎車為研究對象，展開對汽車ABS的研究。主要完成了以下的工作：
通過對單個車輪時的受力分析確定了影響車輪附著系數(shù)的主要因素；
通過比較電磁感應式輪速傳感器和霍爾效應傳感器的性能優(yōu)缺點，采用并設計了霍爾效應式輪速傳感器；
通過對控制結(jié)構的分析設計了以INTEL公司生產(chǎn)的80C196KC單片機為核心的實時控制系統(tǒng)，包括信號輸入電路、控制輸出電路、驅(qū)動電路等硬件部分；
經(jīng)比較各種控制方案，確定了“邏輯門限制法”作為控制方案，并選用加速度和滑移率的組合作為控制參數(shù)。采用事件門限來計算車輪的轉(zhuǎn)速。
本文通過學習比較根據(jù)所學只是設計了ABS控制系統(tǒng)。從理論上實現(xiàn)了ABS的控制功能，完成了設計要求。在設計過程中對汽車制動理論和制動裝置有了較為深入的了解，擴大了自己的知識面，自己解決問題的能力也得到了提高。
關鍵詞：防抱死制動系統(tǒng) 電子控制單元 門限值滑移率 輪速傳感器
ABSTRCT
Anti-lock Braking System (ABS) is an important device to improve the active safety of vehicle. ABS can greatly improve steering control ability during the brake maneuver and shorten stopping distance. Today with the improvement of the vehicle speed, ABS is applied widely.
With the car as the research object, the research on ABS has been carried on. And a series of work were finished:
The dynamic situation of wheel was analyzed. Then, the model of hydraulic ABS was built and assured main complication affect the wheeler appendiculate coefficient.
By comparing the capability of electromagnetism rotate speed sensor with Houer rotate speed sensor, we chose the later, and have designed a sensor of this kind.
Via analyse the control system structure, we have designed a real-time system with the singlechip 80c196kc produced by Intel company .It comprises with signal input, singlechip system, output, drive electro circuit and otherwise parts of hardware segment.
After comparing the different projects of the controllers, the method of logic rate has been comfirmed, and the combination of acceleration and slippage rate as been chose as control parameters. The time gate method to calculate the wheel rotate speed was adopted.
In this paper, based on the knowledge I have mastered, I designed a ABS system and realized the control function in theory, accomplished my assignment. I have gotten a in-depth understand of motorcar trig theory and equipment. It widen my knowledge scope, improved my ability of solving problems.
Kyewords: ABS electronic control slippage gate rotate speed sensor