The Research Of Electric Power Steering Test Bench Based On Hardware-In-Loop System

By the mature development of electronic technology and the lower costs, The Electric Power Steering (EPS) is widely concerned, which has low-power-consumption, high efficiency and environmental protection. In the steering system with the electronic control technology, Electric Power steering (EPS) make heavy complex hydraulic system to be replaced, and help the driver to steer easier and flexibly. By the basis for the development of EPS, researchers pay attention to the Electric Power Steering Test bench as an EPS testing platform for R&D.According to the commission of the China Automotive Technology&Research Center, This article design an Electric Power Steering Test bench based on Hardware-in-Loop (HIL). The specific test program is designed in accordance with national standards; test results can reflect part of the performance of the EPS. In order to facilitate testing, the entire experimental program is realized by the auxiliary controller and HIL system. According to the experimental needs, this paper designs and build mechanical structure of EPS test bench. The auxiliary controller under test program control two servo motors to analog steering wheel torque and the load torque, this part simulate vehicle steering environment for EPS. The German T5torque sensor detect the input torque and load torque, the motor current and EPS ECU sink current use the LEM current sensor to collect. The auxiliary controller collects the torque and current signal data, uploads data to the PC. The VC program prepared on a PC parses the incoming data and the curve shows the corresponding test results.The electric power steering test bench with dSPACE system constitutes a HIL system. This article Writes models on dSPACE’s ControlDesk and realizes of the experimental test program with Stateflow. The system Test the performance of the EPS and show the test curves for analysis in ControlDesk.