For our user study, we use a constant speed to allow for a performance comparison between subjects. For a curve radius of 75m the department of transportation recommends a speed of 48km/h [4] but since our simulator doesn’t take friction into account, we set the speed of the car in the simulator to 50km/h. This value was also chosen because this
requires approximately 17 seconds of steering input from the driver, while steering through the circular sections. This is long enough to evaluate the effectiveness of our haptic steering interface. For input, we used a simulator grade racing wheel, the Logitech G27 Racing Wheel, with an 28 cm diameter (see Figure 8) that was attached to a desk. Every 10ms, we log the position of the car and the position of the steering wheel. Drivers don’t control the speed of the vehicle but start the vehicle by pressing the gas pedal peripheral once with their foot which will cause the car to immediately drive at the target speed. To indicate whether car is moving or waiting for a subject to push the gas pedal, an engine sound is used. We use a short audio file that is played in a loop, and which does not convey any information about the performance of steering.
For our user study, we use a constant speed to allow for a performance comparison between subjects. For a curve radius of 75m the department of transportation recommends a speed of 48km/h [4] but since our simulator doesn’t take friction into account, we set the speed of the car in the simulator to 50km/h. This value was also chosen because thisrequires approximately 17 seconds of steering input from the driver, while steering through the circular sections. This is long enough to evaluate the effectiveness of our haptic steering interface. For input, we used a simulator grade racing wheel, the Logitech G27 Racing Wheel, with an 28 cm diameter (see Figure 8) that was attached to a desk. Every 10ms, we log the position of the car and the position of the steering wheel. Drivers don’t control the speed of the vehicle but start the vehicle by pressing the gas pedal peripheral once with their foot which will cause the car to immediately drive at the target speed. To indicate whether car is moving or waiting for a subject to push the gas pedal, an engine sound is used. We use a short audio file that is played in a loop, and which does not convey any information about the performance of steering.
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