Performance Evaluation of Position-Controlled Electric Power Steering Systems Using a Resistive Torque Device

摘要

The present invention provides a method of simulating disturbance torque to an electric power steering (EPS) system 1 operating in an angle control mode for bench testing. A commercially available resistive torque device 2, such as an electromagnetic brake, is used to apply the desired disturbance torque. A torque transducer 3 and an angle sensor 4, which are connected between the EPS system 1 and resistive torque device 2, are used to measure the system response. An external control device 5 provides angularcommands and other necessary signals to the EPS system 1 for it to function in an angle control mode. Another external control device 6 is used to apply other system loads as needed to produce desired vehicle behavior. One or more controllers 7 are used to determine and command the desired resistive torque, steering angle, and other system loads through devices 2,5 and 6, respectively.