電動(dòng)助力轉(zhuǎn)向系統(tǒng)的故障診斷與分析

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摘要: 隨著科學(xué)技術(shù)的不斷的飛速發(fā)展，現(xiàn)代汽車技術(shù)和電子技術(shù)的應(yīng)用越來(lái)越廣泛。而電動(dòng)助力轉(zhuǎn)向（electronic power steering 簡(jiǎn)稱 EPS）因其具有節(jié)能、環(huán)保、經(jīng)濟(jì)性和安全性等特點(diǎn)，被越來(lái)越多的汽車所采用。轉(zhuǎn)向系統(tǒng)作為汽車最重要的環(huán)節(jié)之一，其可靠性必須達(dá)到一定要求。但是隨著汽車工業(yè)的發(fā)展，轉(zhuǎn)向系統(tǒng)的復(fù)雜性也隨之增高，這使得進(jìn)行汽車故障診斷的必要性更加凸顯。電動(dòng)助力轉(zhuǎn)向作為一個(gè)新興的技術(shù)，故障診斷技術(shù)是實(shí)現(xiàn)其產(chǎn)品化的重要一環(huán)。本文主要針對(duì)電動(dòng)助力轉(zhuǎn)向系統(tǒng)的主要特性來(lái)展開(kāi)研究。
首先，對(duì)電動(dòng)助力轉(zhuǎn)向系統(tǒng)進(jìn)行一個(gè)大體的介紹，包括了電動(dòng)助力轉(zhuǎn)向系統(tǒng)發(fā)展概況、結(jié)構(gòu)和特點(diǎn)。
其次，確立EPS系統(tǒng)的故障樹(shù)模型，明確系統(tǒng)的故障的主要形式，并對(duì)不同結(jié)構(gòu)的EPS系統(tǒng)的主要故障部位進(jìn)行研究。
最后，進(jìn)行故障診斷系統(tǒng)的硬件與軟件的設(shè)計(jì)與研究。主要是對(duì)EPS系統(tǒng)主要故障部位信號(hào)采集處理與判別。
關(guān)鍵詞：電動(dòng)助力轉(zhuǎn)向系統(tǒng) EPS 故障診斷

Fault Diagnosis and Analysis of Electric Power Steering System

Abstract: With the rapid development of science and technology, modern automobile technology and the application of electronic technology is more and more widely. The electric power steering (EPS) because of its characteristics of energy saving, environmental protection, economy and safety, been adopted by more and more cars. As one of the most important link of a car, steering system’s reliability must meet certain requirements. But with the development of automobile industry, the complexity of the steering system is increased, which highlights the necessity of automobile fault diagnosis. Electric power steering as an emerging technology, fault diagnosis technology is an important part of achieve the transition. This paper focuses on the main features of electric power steering system.
First of all, give the electric power steering system a general introduction, including the development situation, structure and characteristics of electric power steering system.
Secondly, establish the FTA of EPS system, clearly understand the main form of system failure, and study the different structure of the main failure parts of the EPS system.
Finally, proceed the design and research of fault diagnosis system hardware and software. The failure part is mainly on the EPS system acquisition and discrimination.
Key Words：electric power steering EPS fault diagnosis technology

目錄
第一章 緒論 1
1.1 汽車轉(zhuǎn)向系統(tǒng)簡(jiǎn)介 1
1.1.1 電動(dòng)助力轉(zhuǎn)向系統(tǒng)發(fā)展簡(jiǎn)述 2
1.1.2 電動(dòng)助力轉(zhuǎn)向系統(tǒng)的組成和工作原理 2
1.1.3 電動(dòng)助力轉(zhuǎn)向系統(tǒng)優(yōu)點(diǎn)及關(guān)鍵技術(shù) 3
1.2 汽車故障診斷技術(shù) 5
1.2.1 汽車故障診斷技術(shù)發(fā)展歷史及趨勢(shì) 5
1.2.2 汽車故障診斷技術(shù)現(xiàn)狀 6
1.2.3 汽車故障診斷方式及方法 6
1.3 本文研究的主要內(nèi)容 7
第二章 基于故障樹(shù)方法的電動(dòng)助力轉(zhuǎn)向系統(tǒng)故障分析及原理 8
2.1 故障樹(shù)簡(jiǎn)述 8
2.1.1 故障樹(shù)發(fā)展歷史 8
2.1.2 故障樹(shù)模型 8
2.1.3 故障樹(shù)分析在EPS故障診斷中的重要意義和必要性 10
2.2 故障樹(shù)的分析 10
2.2.1 故障樹(shù)原理 10
2.2.2 可靠性框圖 11
第三章 電動(dòng)助力轉(zhuǎn)向系統(tǒng)故障樹(shù)分析和建立 13
3.1 EPS故障樹(shù)分析 13
3.1.1 EPS主要故障分析 13
3.1.2 EPS故障樹(shù)建立 15
3.2 轉(zhuǎn)向軸助力式EPS系統(tǒng)故障診斷 16
3.2.1 轉(zhuǎn)矩傳感器故障診斷 16
3.2.2 發(fā)動(dòng)機(jī)轉(zhuǎn)速及車速傳感器故障診斷 17
3.2.3 電動(dòng)機(jī)與離合器故障診斷 18
3.2.4 ECU故障診斷 19
第四章 電動(dòng)助力轉(zhuǎn)向系統(tǒng)故障診斷系統(tǒng)的硬件設(shè)計(jì) 23
4.1 硬件設(shè)計(jì) 23
4.1.1 總體控制系統(tǒng)組成 23
4.1.2 轉(zhuǎn)矩信號(hào)處理電路 24
4.1.3 車速信號(hào)處理電路 24
4.1.4 電動(dòng)機(jī)轉(zhuǎn)速信號(hào)處理電路 25
4.1.5 電動(dòng)機(jī)反饋電流信號(hào)處理電路 25
第五章 電動(dòng)助力轉(zhuǎn)向系統(tǒng)故障診斷系統(tǒng)的軟件設(shè)計(jì) 27
5.1 軟件設(shè)計(jì) 27
5.1.1 總體控制程序設(shè)計(jì) 27
5.1.2 轉(zhuǎn)矩傳感器故障診斷程序 27
5.1.3 電機(jī)及驅(qū)動(dòng)電路故障診斷程序 28
5.1.4 車速及發(fā)動(dòng)機(jī)轉(zhuǎn)速傳感器故 障診斷程序 28
第六章 總結(jié)與展望 33
6.1 總結(jié) 33
6.2 展望 33
致謝 34
參考文獻(xiàn) 35