【導讀】本論文對電動助力轉向系統(tǒng)試驗臺進行了分析和設計。通過研究EPS的工作過程，進。東華轉向器公司的產(chǎn)品，運用AutoCAD畫出試驗臺的裝配圖。液壓滑臺設計，并對一些關鍵部件進行了選擇、校核。

　　

【正文】 測試剛出廠的電動助力轉向系統(tǒng)，測試助力特性，工業(yè)計算機會生成助力特性曲線，并與數(shù)據(jù)庫中的標注助力特性曲線進行比較，評價EPS 系統(tǒng)的好壞。 總結 本設計只是對電動助力轉向試驗臺機械結構的設計，軟件設計和硬件設計由另外兩位同學來完成。試驗臺根據(jù)車速信號來控制助力電動機的電流，以此來控制施加的助力轉矩的大小，可以得到電流與轉矩的關系曲線，然后與數(shù)據(jù)庫中的曲線相比較，可檢測 助力性能的好壞；次試驗臺也可以做轉向器的疲勞實驗，作為剛出廠時的檢測。由于本人能力有限，所以不足之處還請大家?guī)兔χ赋?。汽車電動助力轉向試驗臺涉及機械、汽車、電子和軟件設計等多學科領域，它的發(fā)展一定會促進 EPS 產(chǎn)品質量的提高，對中國汽車工業(yè)產(chǎn)生一定影響。 28 參考文獻 .汽車構造 (第三版下冊 )[M].北京 : 機械工業(yè)出版社 , .汽車設計 (第 四 版 )[M].北京 : 機械工業(yè)出版社 , . 汽車理論 (第三版 )[M].北京 : 機械工業(yè)出版社 ,20xx ,施國標 .汽車電動助力轉向技術的發(fā)展現(xiàn)狀與趨勢 [J].公路交通科技 ,20xx(3): 2328 ,何仁 .汽車電動轉向技術發(fā)展綜述 [J].長安大學學報 (自然科學版 ), 20xx(24): 3437 ,馮櫻 .電子控制式電動助力轉向系統(tǒng)的開發(fā)前景 [J].汽車科技 20xx.(3): 1722 ,周兆元主編 .互換性與測量技術基礎 (第二版 )[M].北京 : 機械工業(yè)出版社， .組合機床設計簡明手冊 [M].北京 : 機械工業(yè)出版社 , .汽車電動助力轉向系統(tǒng)的動力學分析與控制研究 [D].合肥工業(yè)大學碩士學位論文 ,20xx song, Kwangsuck Boo. Model development and control methodology of a new electric power steering system[J].Proc eedings of the Institution of Mec hanical Engineers. Part D, Journal of Automobile Engineering, 20xx, 218 萍 ,周兆元 主編 .互換 性與測量技 術基礎 (第二版 )[M].北京 : 機械工業(yè) 出版社 , 發(fā) ,馮櫻 ,劉洋 .電 動助力 轉向 系統(tǒng)助 力特 性的研 究 [J].湖 北汽車 工業(yè)學 報 , 20xx(15): 1217 ,陳遼軍 .機械工程及自動化簡明設計手冊 (第二版上冊 )[M].北京 : 機械工業(yè)出版社 , .機械設計 [M].北京 : 高等教育出版社 , Hanbin, Zhang Zhongfu. Offline Detection of Electric Power Steering[J].Wuhan: School of Mechantronic Engineering Wuhan University of Technology 29 致 謝 光陰荏苒，時光如梭，轉眼間，四年的大學學習生活已進入尾聲，往日的求學生活及知識的積累，將成為我心底最難忘的回憶和一筆終生的財富。汽車電動助力轉向試驗臺的研究啟迪了我的思維，開拓了我的視野，鍛煉了我的能力。自身能力的提高離不開我的指導老師羅紹新副教授的悉心指導和關懷。在此 論文完成之際，謹向您致以最誠摯的敬意！您淵博的學識、求實的作風、具有開拓性的科學研究和對事業(yè)的執(zhí)著追求精神，讓我體會到了現(xiàn)代學者的風采，同樣感到親人般的溫暖和關愛。我從你身上不僅學到了很多專業(yè)知識，而且學會了很多做人道理，這將是一筆永恒的財富，使我終生受益。還要感謝東華轉向器公司對我的幫助。 在多年的學習生活中，還得到了許多車輛系領導和老師的熱情關心和幫助，在這里我要感謝你們。 在這里我還要感謝我的父母，感謝你們對我養(yǎng)育，感謝各位老師，感謝你們傳授我知識，教我做人，感謝同學陪伴，感謝所有幫助過我的人，感謝你 們讓我順利完成了大學學習以及生活。 最后，向審閱本文的老師們致敬！ 周云鵬 20xx 年 6 月 于南京 30 附錄 A：英文資料 Offline Detection of Electric Power Steering (EPS) Xu Hanbin Zhang Zhongfu School of Mechantronic Engineering Wuhan University of Technology. Wuhan 430070, CHINA\ Abstract: Increasing use of electric power steering (EPS) systems, which affect vehicle dynamic behavior, has prompted the need for a more effective method of testing electric power steering systems, especially to electric control unit (ECU) in EPS. This research aims at building EPS offline platform for realization of performance detection. First, the control logic on EPS is analyzed, and all kinds of input signals influencing on EPS are analyzed and modeled. They include engine velocity, vehicle velocity, selfdiagnosis signal, starter signal and the steering angle. Then, the hardware intheloop simulation (HILS) system is designed. The industrial puter is selected as the main test platform with some ISAbus cards. In addition, the conversion interface is designed to suit the inout need of EPS and the industrial puter. The system will be achieved with both simplicity and usability taken into account. The correlative control software is also developed with the good friendly interface. It can realize the storage of the testing data automatically. At last, the hardwarein theloop simulation system that can implement an actual load (prepared) torque delivered to the steering column is achieved. Experimental studies show that the hardwareintheloop simulation system can satisfy the need of offline detection. Keywords： simulation, electric power steering, hardwareintheloop I. Introduction Electric power steering (EPS) is more energy efficient and environmentally patible. It consumes approximately onetwentieth the energy of conventional hydraulic power steering systems and, as it does not contain any oil, it does not pollute the environment both when it is produced and discarded. As a result, this motivates the great increase of EPSequipped vehicles recently. Although electric power steering systems offer significant advantages over their hydraulic counterparts, electric motor technology and controls had not reached the point where they could be used in this application until just recently. Thus, it is very necessary to improve EPS quality continuously, especially to the core of EPS: electric control unit (ECU). It certainly leads to more tests on EPS, and the tests are also very important for ECU development. It is a problem to 31 process testing in the dynamics of unavailable hardware (not built yet or impossible or inconvenient to access). Now hardwareintheloop simulation (HILS) is introduced. Test in hardwareintheloop simulation is a viable alternative, allowing new electronic control units and software to be tested largely in a virtual environment, without real vehicles or prototypes. This report outlines the construction of the offline EPS detection systems, as well as their main ponents. And EPS experiment based on HILS has been achieved. II. EPS System A. Principle of EPS The EPS system consists of a torque sensor, which senses the driver’s movements of the steering wheel。 an ECU, which performs calculations on assisting force based on signals from the torque sensor。 a motor, which produces turning force according to output from the ECU。 and a reduction gear, which increases the turning force from the motor and transfers it to the steering mechanism. EPS is available in two types: a column type in which the reduction gear is located directly under the steering wheel, and a pinion type in which the reduction gear is attached to the pinion of the rack and pinion assembly. Each type of EPS system is speedsensitive— vehicle speed and engine rotation signals are input from the vehicle into the ECU. shows a vehicle with columntype EPS. The main purpose of any power steering system is, of course, to provide assist to the driver. This is achieved by the torque sensor, which measures the driver’s torque and sends a signal to the