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As the technique promoles, the traditional hydraulic steering controller (Hydraulic Power Steering) vehicles will be gradually steer controller (Electrical Power Steering) replaced. In mainland China is incrased, the demand of millions of electronical steering controller per year is increased, but the vehicle safety and vehicle maneuverability of design are usually not taken into consideration .The main focus is the cost. Since the design of electrical power steering controllers in the world is focused on the safety and maneuverability,the key techniqe would not be discovered. Therefore,a high efficient electrical power steering controller is designed and implemented in this thesis to meet the requirements of vehicle safety, vehicle maneuverability,and fuel saving.
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