Novel electronic power steering system testing platform and testing method thereof

The invention provides a novel electronic power steering system testing platform and a testing method thereof. A steering wheel is installed on an input shaft; a servo motor I uses a reduction box and a synchronous belt to drive the input shaft to make rotation, thereby realizing two kinds of ways of servo loading and hand-operated loading. A torque sensor and an angle sensor are connected to the input shaft. An output terminal of a tested piece electronic power steering (EPS) system a is connected with a damping loading unit by a gear wheel and rack driving mechanism; and bidirectional data transmission among an input loading and detection device, the tested piece EPS system, and an upper computer control and signal processing system is carried out. The upper computer simulates a road condition; and the damping unit is controlled to simulate performance testing and steering hand-feeling testing with a damping moment. The damping loading unit is formed by combination of a magnetic powder brake and a servo mot