A direct-drive simulator steering wheel (sometimes abbreviated "DD") is a simulator steering wheel with a direct-drive mechanism between the drive and output, i.e. without gearing (as opposed to simulator steering wheels with reduction gearing via gears or belts[1][2][3][4]), and is used similarly as with other simulator steering wheels for providing torque feedback (often called ""force" feedback") so that the driver, through movement in the steering wheel, gets an interface for sensing what is happening to the car in the simulator. It is an example of human–computer interaction in driving simulators, racing simulators, and racing video games, and is an example of haptic technology
Direct-drive steering wheels typically differ from geared or belted sim racing wheels by being stronger (having more torque), and being able to more accurately reproduce details from the simulator. They are typically constructed using a 3-phase brushless AC servomotor (on more expensive models), or sometimes a hybrid stepper-servomotor, or only a stepper motor[5] (on very affordable models).
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