Dissertation > Transportation > Road transport > Automotive Engineering > Automotive structural components > Steering system

The Study on the Control System of Auto Electronic Power Steering Based on DSP

Author YangXinHua
Tutor LvZhen
School Liaoning Technical University
Course Control Theory and Control Engineering
Keywords DSP Electric Power Steering Fuzzy PID PWM
CLC U463.4
Type Master's thesis
Year 2008
Downloads 143
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Automotive Electric Power Steering (Electric Power Steering System, EPS) control system is a new type of automobile power steering technology . Compared with traditional hydraulic power steering system , electric power steering system has a low speed steering lightweight, smooth high speed steering , energy conservation , is conducive to environmental protection and many other advantages . Automotive steering technology research hotspot in recent years , has important research value and broad application prospects . This paper first introduces the basic components of automotive electric power steering system works , using DSP chip hardware resources , design based the TMS320LF2407A microprocessor chip (DSP) control automotive electric power steering system . The use of the characteristics of the DC motor torque is proportional to the motor current , using the method of controlling an electric motor armature current , the assist control . The system the assist characteristic curve , assist control system proposed one kind of return is compensation control strategy , using fuzzy PID control algorithm for closed-loop control of the motor current ; using PWM technology control motor voltage to adjust the current size of the booster to reach help . the purpose of the steering . This paper carried out the hardware design of the system , including the H-bridge driver circuit and sensor signal processing circuit , relay and clutch control circuit design , software development and design of the control system on the basis of complete hardware circuit and control strategy . Finally, experimental results indicate that the booster system has good characteristics, to verify the correctness of the design of the entire system .

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