Method of controlling a chassis dynamometer

摘要

A method of controlling a chassis dynamometer (10) to simulate actual road conditions experienced by a vehicle (12) is disclosed. The chassis dynamometer (10) includes at least one actuator (14) coupled to a roller (16). The actuator (14) and roller (16) respond to commands from a controller (18). A load cell (22) is disposed between the actuator (14) and the roller (16) to measure the force exerted between vehicle's tires (24) and the surface of the roller (16). The method comprises the steps of rotating the roller (16) to attain a predetermined target force between the roller (16) and the vehicle (12) and includes the step of establishing a mathematical model of the target force between the roller (16) and the vehicle (12) and rotating the roller (16) in accordance with the mathematical model. The mathematical model accurately simulates the response of the actuator (14) and roller (16) for a given controller input to accurately predict the target force between the roller (16) and vehicle tires (24). Controller (18) input is determined based on the predicted target force to attain the predetermined target force.