【正文】 e up of a realtime bus structure (for example, FlexRay HTTP or CAN) connected to the equipment. Can easily and other system integration, unified coordination control. System work, sensor test driver39。 driver When steering system malfunction, EPS system does not support. Don39。 1 附錄 A 外文文獻原文： In recent years, along with the social life of car motorization, increasing quantities, cause the traffic situation intricate, make drivers to offer the operating frequency increases, driving you need to lighten the fatigue, improve ma nipulation portability and flexibility, and thus power steering system requirements for more and more is also high. So far, automotive steering system through the traditional mechanical steering system, hydraulic steering system and electric hydraulic steering system and electric power steering system four stages of development, the future is likely to wire control power steering system development. Now automotive steering system is in hydraulic steering system and electric hydraulic steering system to electric power steering system development stages of transition . 1. the traditional mechanical steering system Traditional mechanical steering system (MS) mainly by steering control agencies, steering gear and steering transmission mechanism 3 parts. Steering control mechanism is the pilot control redirector work institutions, including the steering wheel at the input from ponents. The steering wheel steering is ing from torque according to certain transmission amplifier and output increases force device, steering the earliest USES is the worm type, later have a screw nut type, rackand pinion type, circulation ball type and other forms. Steering transmission mechanism is passed to the output torque steering steering wheel agencies, including the steering wheel from pitman arm of ponents . When the car needs to change directions, the pilot through turned the steering wheel, steering moment, steering, via steering shaft, horizontal bars and straight bars such as the steering trapezoid arm parts, and to make the day deflection change of direction. Traditional mechanical steering system is the advantage of simple structure, reliable operation, the production cost is low. Its defect is also very obvious: (1) with the bus speed improvement and automotive quality increases, steering control, turning to more and more demanding increased the difficulty. (2) is the ratio is fixed, namely Angle transfer characteristics, cause the car can39。t change the steering response characteristics are unable to control and transmission in the process of steering cannot with speed and lateral acceleration and other parameters of the changes, the pilot must pensate for car before in turn the steering response characteristics of certain operating pensation, such virtually increased the mental and physical burdens driver . 2. hydraulic steering system Hydraulic steering system (HPS) is the traditional mechanical steering system basis with a set of additional hydraulic booster, generally by oil pump, vshaped belt wheel, oil injection equipment, power devices and control valves etc. It with hydraulic 2 oil pump is the power, through the movement to promote produced mechanical redirector work. Because the system through hydraulic works used to promote the traditional mechanical steering mechanism of steering movement so as to reduce the labor intensity, a driver in a certain extent, solve the traditional mechanical steering system caused because of transmission ratio fixed to light and sensitive the contradiction between. But, this kind of power steering system is driven by the steering wheel rotates the hydraulic system directly change torsion bar is the channel area to provide oiling the instrumentality of variable. Namely the discretion of size and speed boost have no relation with steering Angle, only concerned. Steering dish of greater perspective, turn the instrumentality of hydraulic systems provide is bigger also. Meanwhile, this system has the following weakness: (1) no matter car turn not to, as long as