【正文】 轉(zhuǎn)向操縱機構(gòu)是駕駛員操縱轉(zhuǎn)向器工作的機構(gòu)，包括從方向盤到轉(zhuǎn)向器輸入端的零部件。目前汽車轉(zhuǎn)向系統(tǒng)正處在液壓助力轉(zhuǎn)向系統(tǒng)、電液助力轉(zhuǎn)向系統(tǒng)向電動助力轉(zhuǎn)向系統(tǒng)發(fā)展的過渡階段[1]。 6 the driver went leg activity space increases, more convenient. Shipturning plate and the steering without mechanical connection between, generating let pilot able to perceive cars driving condition and actual road conditions lk feeling is more difficult, so current power steering system wire used only for some concept car. Has not conducted batch production and installation, its reliability and cost is the main cause of blocking its development. Mainly displays in if micro controller appears problem, steering system will pletely failure, it is not like electric power steering system and electric hydraulic steering system and hydraulic steering system, in motor or hydraulic system problems, still can take the human to control the car [9]. The system of micro controller if malfunction, because no mechanical system is connected the steering wheel and steering gear, so it could not control cars to turn around. for wire control power steering system outlook Although wire control power steering system now not satisfactory, but SBW still clear is car development direction. SBW system eliminates mechanical connection between the design of steering wheel, tyre will be greatly simplified. Not only improve the design efficiency, but also improve the economy, and car improve overall safety. SBW system work mainly by the electronic ponents to assume. The application of electronic ponents marks a considerable amount of mechanical parts reductions, and steering system the size and weight of ease. The whole process of steering by electronic device to achieve, which greatly improved vehicle fuel efficiency. Because only in need to, we have energy consumption. Based on instantaneous driver condition, the control unit of data from receiving other systems, actuator force needed only supply tires. Steering performance improvement is dependent on sensor receives speed, traction control system and other related variables. When the accident happened to the driver, the most dangerous is the steering wheel collisions. In the car with SBW system, many injuries and deaths due to the steering wheel can be eliminated. Due to the elimination of the mechanical connection, so to high reliability is absolutely necessary. In Europe, have related standards, such as IEC 61508 and EN 61511 [10]. Pure electronic system cannot guarantee failure conditional probability of less than 10 times failure/hour. Because of this and designed the system structure of the fault tolerance, and accurate processing strategy method is necessary. In the control strategies to avoid the failure data errors, and from, active detection, self diagnosis and protection will be used to achieve safety and reliability [11]. For the foreseeable SWB system design and analysis of tolerance, it will bee one of the important before SWB popular topic. 譯文前言近年來，隨著社會生活的汽車化，汽車的保有量不斷增加，由此造成交通情況錯綜復(fù)雜，使得駕駛員轉(zhuǎn)向盤的操作頻率增大，這就需要減輕駕駛疲勞，提高操縱的輕便性和靈活性，因此對動力轉(zhuǎn)向系統(tǒng)的要求也越來越高。 (5) the crash to eliminate the possibility of hacking, don39。 (3) fort enhancement。 (2) removed originally steering system modules of mechanical connection between rigid, has greatly facilitated the system39。t work. Electric power steering system can realtime in different speed for car turned to provide different under the instrumentality of guarantee in lowspeed driving car deft and agile, high speed is stable and reliable. Electric power steering system generally consists of mechanical parts and controlling part. Mechanical parts mainly include transmission unit (the clutch, the steering assembly) and execution unit (electrical), etc. Control part mainly according to sensors to speed and torque signal for puting, drive motor control instructions issued to provide power for steering. EPS pared with HPS, except to save energy outside, due to the elimination of the hydraulic system and improve the environmental performance, solves the malpractices of hydraulic drive brings. The system is made of manufacturers to provide to the vehicle manufacturer, can be directly mounted. Under different conditions of different models, and different for different drivers steering properties, through software modification, convenient and quick. Complete EPS system also includes fault diagnosis and safety protection system. When malfunction happened, could stop booster, automatic recovery to manually control mode and warning signal, and show the memory of abnormal content such as torque sensor itself anomalies, and motor speed sensor abnormal work abnormal, battery abnormal etc [5]. Electric power steering system has bee the vehicle steering system technology development, but the system of mainstream has its limitations, because motor power steering and provide power is limited, if the body is heavier, steering system needs to have larger drive power, electric power steering system is ragged. So the system more for small cars, has lots of equipment to senior cars, and gradually to regular cars and small mercial vehicle development. wire control power steering system With power Steering technology development, the Wire control power Steering system (Steering By Wire, abbreviation SBW) is as automobile electronic technology development and grows the latest achievements of a brandnew Steering system. It through the wire transfer signals, control actuator action to replace traditional steering system of mechanical transmission and mechanical connection from the main controller, help torque in corresponding parameters, after decoding to turn his orders, by executive motor steering motor provides. SBW cancelled and steering wheel steering plate between mechanical connection device, now the steering wheel module, steering executive module and the main controller ECU, three main parts and automatic protection fault systems, power auxiliary module. It is made up of a realtime bus structure (for example, FlexRay HTTP or