Design and Full-Vehicle Tests of EPS Control System

In virtue of the development of power electronics technology, microcomputer control technology and motor control technology, electric power steering (EPS) can markedly improve the automotive dynamic performance and static performance, enhance the driver´s comfort and security, decrease environmental pollution. In this paper, the constitutions and its operational mechanism of electric power steering system are introduced, the power driver circuit of DC motor is discussed. The EPS controller and test-bed were devised, the steering efforts test was performed and analyzed. The test results revealed that the EPS system self-designed has marked steering handiness effort, steering controllability and road feeling, and can meet the requirement of steering performance. The controller design and test results in this paper provide useful references to the further improvement and industrialization of EPS.