HUMAN-AND-HARDWARE-IN-THE-LOOP SIMULATOR FOR STUDYING VEHICLE LONGITUDINAL DYNAMICS

摘要

Vehicles' continuous improvement consists in both fuel efficiency and driving behavior, being one of the current objectives of automotive manufacturers. Taking into account the market demands and specifications, the powertrain architectures became more complex very fast. Numerical simulation is extensively used for multiple evaluation and calibration processes of different architectures. Usually, the simulations are done "offline", without feedback from the real system. "Online" simulations have one feedback degree from components of the real system (hardware-in-the-loop - HIL) and cannot ensure the human feedback on the vehicle comfort or driving pleasure. Therefore, it is difficult to compare various transmissions types even though some objective criteria are defined for a given maneuver or type of transmissions and it is more challenging when each market's particularities must be considered. This paper describes the development of a human-and-hardware-in-the-loop (H~2IL) simulator. One of the main objectives of the simulator is to allow regular drivers to assess the comfort and driving pleasure for different engine/transmission/vehicle configurations. The simulator consists in a virtual electric vehicle, having its own control. The simulator is a test platform and a tool for further developments and optimizations. The simulator allows reproducing different powertrain architectures and different driving profiles.